MICROCHIP OPTION_REG

MCP19111
Digitally Enhanced Power Analog Controller
with Integrated Synchronous Driver
Synchronous Buck Features:
Microcontroller Features:
•
•
•
•
•
• Precision 8 MHz Internal Oscillator Block:
- Factory Calibrated
• Interrupt Capable
- Firmware
- Interrupt-on-Change Pins
• Only 35 Instructions to Learn
• 4096 Words On-Chip Program Memory
• High Endurance Flash:
- 100,000 write Flash Endurance
- Flash Retention: >40 years
• Watchdog Timer (WDT) with Independent
Oscillator for Reliable Operation
• Programmable Code Protection
• In-Circuit Debug (ICD) via Two Pins
• In-Circuit Serial Programming™ (ICSP™) via Two
Pins
• 14 I/O Pins and One Input-Only Pin
- 3 Open Drain Pins
• Analog-to-Digital Converter (ADC):
- 10-bit Resolution
- 12 Internal Channels
- 8 External Channels
• Timer0: 8-bit Timer/Counter with 8-Bit Prescaler
• Enhanced Timer1:
- 16-bit Timer/Counter with Prescaler
- 2 Selectable Clock Sources
• Timer2: 8-Bit Timer/Counter with Prescaler
- 8-bit Period Register
• I2CTM Communication:
- 7-bit Address Masking
- 2 Dedicated Address Registers
- SMBus/PMBusTM Compatibility
•
•
•
•
•
•
•
Input Voltage: 4.5V to 32V
Output Voltage: 0.5V to 3.6V
Switching Frequency: 100 kHz to 1.6 MHz
Quiescent Current: 5 mA Typical
High-Drive:
- +5V Gate Drive
- 1A/2A Source Current
- 1A/2A Sink Current
Low-Drive:
- +5V Gate Drive
- 2A Source Current
- 4A Sink Current
Peak Current Mode Control
Differential Remote Output Sense
Multi-Phase Systems:
- Master or Slave
- Frequency Synchronized
- Common Error Signal
Multiple Output Systems:
- Master or Slave
- Frequency Synchronized
Configureable Parameters:
- Overcurrent Limit
- Input Under Voltage Lockout
- Output Overvoltage
- Output Under Voltage
- Internal Analog Compensation
- Soft Start Profile
- Synchronous Driver Dead Time
- Switching Frequency
Thermal Shutdown
 2013 Microchip Technology Inc.
DS22331A-page 1
MCP19111
GPB2
GPB5
GPB1
-VSEN
+VSEN
+ISEN
-ISEN
28
27
26
25
24
23
22
Pin Diagram – 28-Pin QFN (MCP19111)
GPA0
1
21
GPB6
GPA1
2
20
VDD
GPA2
3
19
BOOT
GPB4
4
18
HDRV
GPA3
5
17
PHASE
GPA7
6
16
VDR
15
LDRV
MCP19111
EXP-29
DS22331A-page 2
8
9
10
11
12
13
14
GPA4
GPB0
GPB7
GND
VIN
PGND
7
GPA5/MCLR
GPA6
 2013 Microchip Technology Inc.
MCP19111
Timers
MSSP
1
Y
AN0
—
—
GPA1
2
Y
AN1
—
—
GPA2
3
Y
AN2
T0CKI
GPA3
5
Y
AN3
GPA4
9
N
—
—
Pull-up
A/D
GPA0
Interrupt
I/O
ANSEL
28-PIN SUMMARY
28-Pin QFN
TABLE 1:
Basic
Additional
IOC
Y
—
Analog Debug Output (1)
IOC
Y
—
Sync Signal In/Out (2, 3)
—
IOC
INT
Y
—
—
—
IOC
Y
—
—
—
IOC
N
—
—
MCLR
—
—
(4)
IOC
(5)
GPA5
8
N
—
—
Y
GPA6
7
N
—
—
—
IOC
N
—
GPA7
6
N
—
—
SCL
IOC
N
—
GPB0
10
N
—
—
SDA
IOC
N
—
—
GPB1
26
Y
AN4
—
—
IOC
Y
—
Error Signal In/Out (3)
GPB2
28
Y
AN5
—
—
IOC
Y
—
—
GPB4
4
Y
AN6
—
—
IOC
Y
ICSPDAT
ICDDAT
—
GPB5
27
Y
AN7
—
—
IOC
Y
ICSPCLK
ICDCLK
Alternate Sync
Signal In/Out (2, 3)
GPB6
21
N
—
—
—
IOC
Y
—
—
GPB7
11
N
—
—
—
IOC
Y
—
—
VIN
13
N
—
—
—
—
—
VIN
Device Input Voltage
VDR
16
N
—
—
—
—
—
VDR
Gate Drive Supply Input
Voltage
VDD
20
N
—
—
—
—
—
VDD
Internal Regulator Output
GND
12
N
—
—
—
—
—
GND
Small Signal Ground
PGND
14
N
—
—
—
—
—
—
Large Signal Ground
LDRV
15
N
—
—
—
—
—
—
Low-Side MOSFET
Connection
HDRV
18
N
—
—
—
—
—
—
High-Side MOSFET
Connection
PHASE
17
N
—
—
—
—
—
—
Switch Node
BOOT
19
N
—
—
—
—
—
—
Floating Bootstrap Supply
+VSEN
24
N
—
—
—
—
—
—
Output Voltage
Differential Sense
-VSEN
25
N
—
—
—
—
—
—
Output Voltage
Differential Sense
+ISEN
23
N
—
—
—
—
—
—
Current Sense Input
22
N
—
—
—
—
—
—
Current Sense Input
-ISEN
Note 1:
2:
3:
4:
5:
The Analog Debug Output is selected when the ATSTCON<BNCHEN> bit is set.
Selected when device is functioning as multiple output master or slave by proper configuration of the MLTPH<2:0> bits
in the BUFFCON register.
Selected when device is functioning as multi-phase master or slave by proper configuration of the MLTPH<2:0> bits in
the BUFFCON register.
The IOC is disabled when MCLR is enabled.
Weak pull-up always enabled when MCLR is enabled, otherwise the pull-up is under user control.
 2013 Microchip Technology Inc.
DS22331A-page 3
MCP19111
Table of Contents
1.0 Device Overview .......................................................................................................................................................................... 7
2.0 Pin Description ........................................................................................................................................................................... 10
3.0 Functional Description ................................................................................................................................................................ 15
4.0 Electrical Characteristics ............................................................................................................................................................ 21
5.0 Digital Electrical Characteristics ................................................................................................................................................. 27
6.0 Configuring the MCP19111......................................................................................................................................................... 35
7.0 Typical Performance Curves ...................................................................................................................................................... 51
8.0 System Bench Testing ................................................................................................................................................................ 55
9.0 Device Calibration ...................................................................................................................................................................... 57
10.0 Relative Efficiency Measurement ............................................................................................................................................... 65
11.0 Memory Organization ................................................................................................................................................................. 67
12.0 Device Configuration .................................................................................................................................................................. 79
13.0 Oscillator Modes......................................................................................................................................................................... 81
14.0 Resets ........................................................................................................................................................................................ 83
15.0 Interrupts .................................................................................................................................................................................... 91
16.0 Power-Down Mode (Sleep) ........................................................................................................................................................ 99
17.0 Watchdog Timer (WDT)............................................................................................................................................................ 101
18.0 Flash Program Memory Control ............................................................................................................................................... 103
19.0 I/O Ports ................................................................................................................................................................................... 109
20.0 Interrupt-On-Change .................................................................................................................................................................119
21.0 Internal Temperature Indicator Module..................................................................................................................................... 121
22.0 Analog-to-Digital Converter (ADC) Module .............................................................................................................................. 123
23.0 Timer0 Module.......................................................................................................................................................................... 133
24.0 Timer1 Module with Gate Control............................................................................................................................................. 135
25.0 Timer2 Module.......................................................................................................................................................................... 138
26.0 PWM Module............................................................................................................................................................................ 141
27.0 Master Synchronous Serial Port (MSSP) Module .................................................................................................................... 145
28.0 In-Circuit Serial Programming™ (ICSP™) ............................................................................................................................... 189
29.0 Instruction Set Summary .......................................................................................................................................................... 191
30.0 Development Support............................................................................................................................................................... 201
31.0 Packaging Information.............................................................................................................................................................. 205
Appendix A: Revision History............................................................................................................................................................. 209
Index ...................................................................................................................................................................................................211
The Microchip Web Site ..................................................................................................................................................................... 217
Customer Change Notification Service .............................................................................................................................................. 217
Customer Support .............................................................................................................................................................................. 217
Reader Response .............................................................................................................................................................................. 218
Product Identification System............................................................................................................................................................. 219
DS22331A-page 4
 2013 Microchip Technology Inc.
MCP19111
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The last character of the literature number is the version number, (e.g., DS30000A is version A of document DS30000).
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An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current
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To determine if an errata sheet exists for a particular device, please check with one of the following:
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 2013 Microchip Technology Inc.
DS22331A-page 5
MCP19111
NOTES:
DS22331A-page 6
 2013 Microchip Technology Inc.
MCP19111
1.0
DEVICE OVERVIEW
After initial device configuration using Microchip’s
MPLAB® X Integrated Development Environment (IDE)
software, the PMBus or I2C can be used by a host to
communicate with, or modify, the operation of the
MCP19111.
The MCP19111 is a highly integrated, mixed signal,
analog pulse-width modulation (PWM) current mode
controller with an integrated microcontroller core for
synchronous DC/DC step-down applications. Since the
MCP19111 uses traditional analog control circuitry to
regulate the output of the DC/DC converter, the integration of the PIC® microcontroller mid-range core is used
to provide complete customization of device operating
parameters, start-up and shut down profiles, protection
levels and fault handling procedures.
Two internal linear regulators generate two 5V rails.
One 5V rail is used to provide power for the internal
analog circuitry and is contained on-chip. The second
5V rail provides power to the PIC device and is present
on the VDD pin. It is recommended that a 1 µF capacitor
be placed between VDD and PGND. The VDD pin may
also be directly connected to the VDR pin, or connected
through a low-pass RC filter. The VDR pin provides
power to the internal synchronous driver.
The MCP19111 is designed to efficiently operate from
a single 4.5V to 32V supply. It features integrated
synchronous drivers, bootstrap device, internal linear
regulator and 4 kW nonvolatile memory all in a
space-saving 28-pin 5 mm x 5mm QFN package.
FIGURE 1-1:
TYPICAL APPLICATION CIRCUIT
VIN
GPA6
VIN
GPB1
TRACK
PGOOD
CNTL
ADDR1
ADDR0
SYNC
SMBus Alert
SCL
SDA
ICDDAT
MPLAB® X ICD
Programmer
ICDCLK
MCLR
 2013 Microchip Technology Inc.
GPA0
HDRV
GPA2
BOOT
GPB2
PHASE
+VOUT
GPA3
LDRV
-VOUT
GPB7
VDD
GPB6
MCP19111
VDR
GPA1
+ISEN
GPA4
-ISEN
GPA7
+VSEN
GPB0
-VSEN
GPB4
PGND
GPB5
GND
GPA5
DS22331A-page 7
MCP19111 SYNCHRONOUS BUCK BLOCK DIAGRAM
VIN
Bias Gen
dc current sense gain
VDD
VDD
LDO1
To ADC
LDO2
VIN
VDR
AVDD
3
+ISEN
BGAP
CSDGEN
bit
5R
4
-ISEN
ac current sense gain
R
+ISEN
UVLO
VDAC
6
BOOT
8
VOUT
OV
OV REF
5
8
VIN
VOUT
UV
UV REF
OC
Comp
8+5
HDRV
VREGREF
PHASE
BGAP
AVDD
4
Lo_on
-ISEN
DLY
4
Slave
Mode
VOUT
VOUT
LVL_SFT
LDRV
+VSEN
VDR
-VSEN
 2013 Microchip Technology Inc.
DLY
4
4
4
Lo_on
5
VZC
Master
Mode
Debug
MUX
OV
-VSEN
UV VIN_OK OCFLAG
I/O
A/D Mux
I/O(Digital Signals)
PGND
PIC CORE
I/O
+VSEN
GND
15
MCP19111
DS22331A-page 8
FIGURE 1-2:
MCP19111
FIGURE 1-3:
MICROCONTROLLER CORE BLOCK DIAGRAM
Configuration
13
Flash
4K x 14
Program
Memory
Program
Bus
PORTA
GPA0
GPA1
GPA2
GPA3
GPA4
GPA5
RAM
256
bytes
File
Registers
8 Level Stack
(13-bit)
14
8
Data Bus
Program Counter
RAM Addr
GPA6
GPA7
9
Addr MUX
Instruction reg
Direct Addr
7
8
Indirect
Addr
PORTB
GPB0
FSR reg
GPB1
GPB2
STATUS reg
8
3
Instruction
Decode &
Control
TESTCLKIN
Timing
Generation
GPB4
GPB5
MUX
Power-up
Timer
GPB6
GPB7
ALU
Power-on
Reset
Watchdog
Timer
8
W reg
MSSP
SDA
SCL
8 MHz Internal
Oscillator
MCLR
VIN VSS
PMDATL
Self read/
write flash
memory
Timer0
Timer1
Timer2
EEADDR
T0CKI
Analog interface
PWM
registers
 2013 Microchip Technology Inc.
DS22331A-page 9
MCP19111
2.0
PIN DESCRIPTION
The 28-Lead MCP19111 device features pins that have
multiple functions associated with each pin. Table 2-1
provides a description of the different functions. See
Section 2.1 “Detailed Pin Functional Description”
for more detailed information.
TABLE 2-1:
MCP19111 PINOUT DESCRIPTION
Name
GPA0/AN0/ANALOG_TEST
GPA1/AN1/CLKPIN
Function
Input
Type
Output
Type
GPA0
TTL
CMOS
General purpose I/O
AN0
AN
—
A/D Channel 0 input.
ANALOG_TEST
—
—
Internal analog signal multiplexer output (1)
GPA1
TTL
CMOS
General purpose I/O
Description
AN1
AN
—
A/D Channel 1 input.
CLKPIN
—
—
Switching frequency clock input or output (2 ,3)
GPA2
TTL
CMOS
General purpose I/O
AN2
AN
—
A/D Channel 2 input
T0CKI
ST
—
Timer0 clock input
INT
ST
—
External interrupt
GPA3
TTL
CMOS
General purpose I/O
AN3
AN
—
A/D Channel 3 input
GPA4
GPA4
TTL
OD
General purpose I/O
GPA5/MCLR
GPA5
TTL
—
General purpose input only
GPA2/AN2/T0CKI/INT
GPA3/AN3
MCLR
ST
—
GPA6
GPA6
ST
CMOS
GPA7/SCL
GPA7
ST
OD
General purpose open drain I/O
SCL
I2C
OD
I2C clock
GPB0
TTL
OD
SDA
I2C
OD
GPB1
TTL
CMOS
General purpose I/O
AN4
AN
—
A/D Channel 4 input
EAPIN
—
—
Error amplifier signal input/output (3)
GPB2/AN5
GPB2
TTL
CMOS
AN5
AN
—
A/D Channel 5 input
GPB4/AN6/ICSPDAT
GPB4
TTL
CMOS
General purpose I/O
AN6
AN
—
A/D Channel 6 input
ICSPDAT
ST
CMOS
GPB0/SDA
GPB1/AN4/EAPIN
Legend:
Note 1:
2:
3:
Master Clear with internal pull-up
General purpose I/O
I2C data input/output
General purpose I/O
Primary Serial Programming Data I/O
AN = Analog input or output CMOS =CMOS compatible input or output
OD = Open Drain
TTL = TTL compatible input
ST
=Schmitt Trigger input with CMOS levels I2C = Schmitt Trigger input with I2C
Analog Test is selected when the ATSTCON<BNCHEN> bit is set.
Selected when device is functioning as multiple output master or slave by proper configuration of the MLTPH<2:0> bits
in the BUFFCON register.
Selected when device is functioning as multi-phase master or slave by proper configuration of the MLTPH<2:0> bits in
the BUFFCON register.
DS22331A-page 10
 2013 Microchip Technology Inc.
MCP19111
TABLE 2-1:
MCP19111 PINOUT DESCRIPTION (CONTINUED)
Name
GPB5/AN7/ICSPCLK/
ALT_CLKPIN
Function
Input
Type
Output
Type
GPB5
TTL
CMOS
Description
General purpose I/O
AN7
AN
—
A/D Channel 7 input
ISCPCLK
ST
—
Primary Serial Programming Clock
ALT_CLKPIN
—
—
Alternate switching frequency clock input
or output (2,3)
GPB6
GPB6
TTL
CMOS
General purpose I/O
GPB7
GPB7
TTL
CMOS
General purpose I/O
VIN
VIN
—
—
Device input supply voltage
VDD
VDD
—
—
Internal +5V LDO output pin
VDR
VDR
—
—
Gate drive supply input voltage pin
GND
GND
—
—
Small signal quiet ground
PGND
PGND
—
—
Large signal power ground
LDRV
LDRV
—
—
High-current drive signal connected to the gate
of the low-side MOSFET
HDRV
HDRV
—
—
Floating high-current drive signal connected to
the gate of the high-side MOSFET
PHASE
PHASE
—
—
Synchronous buck switch node connection
BOOT
BOOT
—
—
Floating bootstrap supply
+VSEN
+VSEN
—
—
Positive input of the output voltage sense
differential amplifier
-VSEN
-VSEN
—
—
Negative input of the output voltage sense
differential amplifier
+ISEN
+ISEN
—
—
Current sense input
-ISEN
-ISEN
—
—
Current sense input
—
—
—
Exposed Thermal Pad
EP
Legend:
Note 1:
2:
3:
AN = Analog input or output CMOS =CMOS compatible input or output
OD = Open Drain
TTL = TTL compatible input
ST
=Schmitt Trigger input with CMOS levels I2C = Schmitt Trigger input with I2C
Analog Test is selected when the ATSTCON<BNCHEN> bit is set.
Selected when device is functioning as multiple output master or slave by proper configuration of the MLTPH<2:0> bits
in the BUFFCON register.
Selected when device is functioning as multi-phase master or slave by proper configuration of the MLTPH<2:0> bits in
the BUFFCON register.
 2013 Microchip Technology Inc.
DS22331A-page 11
MCP19111
2.1
2.1.1
Detailed Pin Functional
Description
GPA0 PIN
GPA0 is a general purpose TTL input or CMOS output
pin whose data direction is controlled in TRISGPA. An
internal weak pull-up and interrupt-on-change are also
available.
AN0 is an input to the A/D. To configure this pin to be
read by the A/D on channel 0, bits TRISA0 and ANSA0
must be set.
When the ATSTCON<BNCHEN> bit is set, this pin is
configured as the ANALOG_TEST function. It is a
buffered output of the internal analog signal
multiplexer. Signals present on this pin are controlled
by the BUFFCON register, see Register 8-2.
2.1.2
GPA1 PIN
GPA1 is a general purpose TTL input or CMOS output
pin whose data direction is controlled in TRISGPA. An
internal weak pull-up and interrupt-on-change are also
available.
AN1 is an input to the A/D. To configure this pin to be
read by the A/D on channel 1, bits TRISA1 and ANSA1
must be set.
When the MCP19111 is configured as a multiple output
or multi-phase MASTER or SLAVE, this pin is
configured to be the switching frequency
synchronization input or output, CLKPIN. See
Section 3.10.6
“Multi-Phase
System”
and
Section 3.10.7 “Multiple Output System” for more
information.
2.1.3
GPA2 PIN
GPA2 is a general purpose TTL input or CMOS output
pin whose data direction is controlled in TRISGPA. An
internal weak pull-up and interrupt-on-change are also
available.
AN3 is an input to the A/D. To configure this pin to be
read by the A/D on channel 3, bits TRISA3 and ANSA3
must be set.
2.1.5
GPA4 PIN
GPA4 is a true open drain general purpose pin whose
data direction is controlled in TRISGPA. There is no
internal connection between this pin and device VDD,
making this pin ideal to be used as an SMBus Alert pin.
This pin does not have a weak pull-up, but interrupt-onchange is available.
2.1.6
GPA5 PIN
GPA5 is a general purpose TTL input-only pin. An internal weak pull-up and interrupt-on-change are also
available.
For programming purposes, this pin is to be connected
to the MCLR pin of the serial programmer. See
Section 28.0 “In-Circuit Serial Programming™
(ICSP™)” for more information.
2.1.7
GPA6 PIN
GPA6 is a general purpose CMOS input/output pin
whose data direction is controlled in TRISGPA. An
interrupt-on-change is also available.
2.1.8
GPA7 PIN
GPA7 is a true open drain general purpose pin whose
data direction is controlled in TRISGPA. There is no
internal connection between this pin and device VDD.
This pin does not have a weak pull-up, but interrupt-onchange is available.
When the MCP19111 is configured for I2C
communication (see Section 27.2 “I2C Mode
Overview”), GPA7 functions as the I2C clock, SCL.
2.1.9
GPB0 PIN
AN2 is an input to the A/D. To configure this pin to be
read by the A/D on channel 2, bits TRISA2 and ANSA2
must be set.
GPB0 is a true open drain general purpose pin whose
data direction is controlled in TRISGPB. There is no
internal connection between this pin and device VDD.
This pin does not have a weak pull-up, but
interrupt-on-change is available.
When bit T0CS is set, the T0CKI function is enabled.
See Section 23.0 “Timer0 Module” for more
information.
When the MCP19111 is configured for I2C
communication (see Section 27.2 “I2C Mode
Overview”), GPB0 functions as the I2C clock, SDA.
GPA2 can also be configured as an external interrupt
by setting of the INTE bit. See Section 15.2 “GPA2/
INT Interrupt” for more information.
2.1.4
GPA3 PIN
GPA3 is a general purpose TTL input or CMOS output
pin whose data direction is controlled in TRISGPA. An
internal weak pull-up and interrupt-on-change are also
available.
DS22331A-page 12
 2013 Microchip Technology Inc.
MCP19111
2.1.10
GPB1 PIN
GPB1 is a general purpose TTL input or CMOS output
pin whose data direction is controlled in TRISGPB. An
internal weak pull-up and interrupt-on-change are also
available.
AN4 is an input to the A/D. To configure this pin to be
read by the A/D on channel 4, bits TRISB1 and ANSB1
must be set.
When the MCP19111 is configured as a multiple output
or multi-phase MASTER or SLAVE, this pin is configured to be the error amplifier signal input or output. See
Section 3.10.6
“Multi-Phase
System”
and
Section 3.10.7 “Multiple Output System”, for more
information.
2.1.11
GPB2 PIN
GPB2 is a general purpose TTL input or CMOS output
pin whose data direction is controlled in TRISGPB. An
internal weak pull-up and interrupt-on-change are also
available.
AN5 is an input to the A/D. To configure this pin to be
read by the A/D on channel 5, bits TRISB2 and ANSB2
must be set.
2.1.12
GPB4 PIN
GPB4 is a general purpose TTL input or CMOS output
pin whose data direction is controlled in TRISGPB. An
internal weak pull-up and interrupt-on-change are also
available.
2.1.14
GPB6 PIN
GPB6 is a general purpose TTL input or CMOS output
pin whose data direction is controlled in TRISGPB. An
internal weak pull-up and interrupt-on-change are also
available.
2.1.15
GPB7 PIN
GPB7 is a general purpose TTL input or CMOS output
pin whose data direction is controlled in TRISGPB. An
internal weak pull-up and interrupt-on-change are also
available.
2.1.16
VIN PIN
Device input power connection pin. It is recommended
that capacitance be placed between this pin and the
GND pin of the device.
2.1.17
VDD PIN
The output of the internal +5.0V regulator is connected
to this pin. It is recommended that a 1.0 µF bypass
capacitor be connected between this pin and the GND
pin of the device. The bypass capacitor should be
placed physically close to the device.
2.1.18
VDR PIN
The 5V supply for the low-side driver is connected to
this pin. The pin can be connected by an RC filter to the
VDD pin.
2.1.19
GND PIN
AN6 is an input to the A/D. To configure this pin to be
read by the A/D on channel 6, bits TRISB4 and ANSB4
must be set.
GND is the small signal ground connection pin. This pin
should be connected to the exposed pad, on the
bottom of the package.
ISCPDAT is the primary serial programming data input
function. This is used in conjunction with ICSPCLK to
serial program the device.
2.1.20
2.1.13
GBP5 PIN
GPB5 is a general purpose TTL input or CMOS output
pin whose data direction is controlled in TRISGPB. An
internal weak pull-up and interrupt-on-change are also
available.
AN7 is an input to the A/D. To configure this pin to be
read by the A/D on channel 7, bits TRISB5 and ANSB5
must be set.
ISCPCLK is the primary serial programming clock function. This is used in conjunction with ICSPDAT to serial
program the device.
This pin can also be configured as an alternate switching frequency synchronization input or output,
ALT_CLKPIN, for use in multiple output or multi-phase
systems. See Section 19.1 “Alternate Pin Function”
for more information.
 2013 Microchip Technology Inc.
PGND PIN
Connect all large signal level ground returns to PGND.
These large-signal level ground traces should have a
small loop area and minimal length to prevent coupling
of switching noise to sensitive traces.
2.1.21
LDRV PIN
The gate of the low-side or rectifying MOSFET is
connected to LDRV. The PCB tracing connecting LDRV
to the gate must be of minimal length and appropriate
width to handle the high peak drive currents and fast
voltage transitions.
2.1.22
HDRV PIN
The gate of the high-side MOSFET is connected to
HDRV. This is a floating driver referenced to PHASE.
The PCB trace connecting HDRV to the gate must be
of minimal length and appropriate width to handle the
high peak drive current and fast voltage transitions.
DS22331A-page 13
MCP19111
2.1.23
PHASE PIN
The PHASE pin provides the return path for the highside gate driver. The source of the high-side MOSFET,
drain of the low-side MOSFET and the inductor are
connected to this pin.
2.1.24
BOOT PIN
The BOOT pin is the floating bootstrap supply pin for
the high-side gate driver. A capacitor is connected
between this pin and the PHASE pin to provide the
necessary charge to turn on the high-side MOSFET.
2.1.25
+VSEN PIN
The non-inverting input of the unity gain amplifier used
for output voltage remote sensing is connected to the
+VSEN pin. This pin can be internally pulled-up to VDD
by setting PE1<PUEN> bit.
2.1.26
-VSEN PIN
The inverting input of the unity gain amplifier used for
output voltage remote sensing is connected to the
-VSEN pin. This pin can be internally pull-down to GND
by setting PE1<PDEN> bit.
2.1.27
+ISEN PIN
The non-inverting input of the current sense amplifier is
connected to the +ISEN pin.
2.1.28
-ISEN PIN
The inverting input of the current sense amplifier is
connected to the -ISEN pin.
2.1.29
EXPOSED PAD (EP)
There is no internal connection to the Exposed Thermal
Pad. The EP should be connected to the GND pin and
to the GND PCB plane to aid in the removal of the heat.
DS22331A-page 14
 2013 Microchip Technology Inc.
MCP19111
3.0
FUNCTIONAL DESCRIPTION
3.1
Linear Regulators
Two internal linear regulators generate two 5V rails.
One 5V rail is used to provide power for the internal
analog circuitry and is contained on-chip. The second
5V rail provides power to the internal PIC core and it is
present on the VDD pin. It is recommended that a 1 µF
capacitor be placed between VDD and PGND.
The VDR pin provides power to the internal
synchronous MOSFET driver. VDD can be directly
connected to VDR or connected through a low-pass RC
filter to provide noise filtering. A 1 µF ceramic bypass
capacitor should be placed between VDR and PGND.
When connecting VDD to VDR, the gate drive current
required to drive the external MOSFETs must be added
to the MCP19111 quiescent current, IQ(max). This total
current must be less than the maximum current,
IDD-OUT, available from VDD that is specified in
Section 4.2 “Electrical Characteristics”.
EQUATION 3-1:
TOTAL REGULATOR
CURRENT
I DD – OUT >  I Q + I DRIVE + I EXT 
Where:
- IDD-OUT is the total current available from VDD
- IQ is the device quiescent current
- IDRIVE is the current required to drive the
external MOSFETs
- IEXT is the amount of current used to power
additional external circuitry.
EQUATION 3-2:
GATE DRIVE CURRENT
I DRIVE =  Q gHIGH + Q gLOW   FSW
Where:
- IDRIVE is the current required to drive the
external MOSFETs
- QgHIGH is the total gate charge of the
high-side MOSFET
- QgLOW is the total gate charge of the
low-side MOSFET
- FSW is the switching frequency
Alternatively, an external regulator can be used to
power the synchronous driver. An external 5V source
can be connected to VDR. The amount of current
required from this external source can be found in
Equation 3-2. Care must be taken that the voltage
applied to VDR does not exceed the maximum ratings
found
in
Section 4.1
“Absolute
Maximum
Ratings (†)”.
 2013 Microchip Technology Inc.
3.2
Internal Synchronous Driver
The internal synchronous driver is capable of driving
two N-Channel MOSFETs in a synchronous rectified
buck converter topology. The gate of the floating
MOSFET is connected to the HDRV pin. The source of
this MOSFET is connected to the PHASE pin. The
HDRV pin source and sink current is configurable. By
setting the DRVSTR bit in the PE1 register, the highside is capable of sourcing and sinking a peak current
of 1A. By clearing this bit, the source and sink peak
current is 2A.
Note 1: The PE1<DRVSTR> bit configures the
peak source/sink current of the HDRV
pin.
The MOSFET connected to the LDRV pin is not
floating. The low-side MOSFET gate is connected to
the LDRV pin and the source of this MOSFET is
connected to PGND. The drive strength of the LDRV pin
is not configurable. This pin is capable of sourcing a
peak current of 2A. The peak sink current is 4A. This
helps keep the low-side MOSFET off when the
high-side MOSFET is turning on.
Note 1: Refer to Figure 1-1 for a graphical
representation
of
the
MOSFET
connections.
3.2.1
MOSFET DRIVER DEAD TIME
The MOSFET driver dead time is defined as the time
between one drive signal going low and the
complimentary drive signal going high. Refer to
Figure 6-2. The MCP19111 has the capability to adjust
both the high-side and low-side driver dead time
independently. The adjustment of the driver dead time
is controlled by the DEADCON register and is
adjustable in 4 ns increments.
Note 1: The DEADCON register controls the
amount of dead time added to the HDRV
or LDRV signal. The dead time circuitry is
enabled by the LDLYBY and HDLYBY
bits in the PE1 register.
3.2.2
MOSFET DRIVER CONTROL
The MCP19111 has the ability to disable the entire
synchronous driver or just one side of the synchronous
drive signal. The bits that control the MOSFET driver
can be found in the Register 8-1.
By
setting
ATSTCON<DRVDIS>,
the
entire
synchronous driver is disabled. The HDRV and LDRV
signals are set low and the PHASE pin is floating.
Clearing this bit allows normal operation.
DS22331A-page 15
MCP19111
Individual control of the HDRV or LDRV signal is
accomplished by setting or clearing the HIDIS or
LODIS bits in the ATSTCON register. When either
driver is disabled, the output signal is set low.
3.3
The MCP19111 contains a unity gain differential
amplifier used for remote sensing of the output voltage.
Connect the +VSEN and -VSEN pins directly at the load
for better load regulation. The +VSEN and -VSEN are the
positive and negative inputs, respectively, of the
differential amplifier.
Switching Frequency
The switching frequency is configurable over the range
of 100 kHz to 1.6 MHz. The Timer2 module is used to
generate the HDRV/LDRV switching frequency. Refer
to Section 26.0 “PWM Module” for more information.
Example 3-1 shows how to configure the MCP19111
for a switching frequency of 300 kHz.
EXAMPLE 3-1:
BANKSEL
CLRF
CLRF
MOVLW
MOVWF
MOVLW
MOVWF
MOVLW
MOVWF
MOVLW
MOVWF
3.5
SIMPLIFIED INTERNAL
COMPENSATION
+VSEN
Output Voltage
The output voltage is configured by the settings
contained in the OVCCON and OVFCON registers. No
external resistor divider is needed to set the output
voltage. Refer to Section 6.10 “Output Voltage
Configuration”.
3.4
FIGURE 3-1:
CONFIGURING FSW
T2CON
T2CON
TMR2
0x19
PR2
0x0A
PWMRL
0x00
PWMPHL
0x04
T2CON
;Turn off Timer2
;Initialize module
;Fsw=300 kHz
;Max duty cycle=40%
;No phase shift
;Turn on Timer2
Compensation
The MCP19111 is an analog peak current mode
controller with integrated adjustable compensation.
The CMPZCON register is used to adjust the
compensation zero frequency and gain. Figure 3-1
shows the internal compensation network with the
output differential amplifier.
-VSEN
VREF
3.6
Slope Compensation
In current mode control systems, slope compensation
needs to be added to the control path to help prevent
subharmonic oscillation when operating with greater
than 50% duty cycle. In the MCP19111, a negative
slope is added to the error amplifier output signal
before it is compared to the current sense signal. The
amount of slope added is controlled by the
SLPCRCON register, Register 6-7.
Note 1: To enable the slope compensation
circuitry, the ABECON<SLCPBY> bit
must be cleared.
The amount of slope compensation added should be
equal to the inductor current down slope during the
high-side off time.
3.7
Current Sense
The output current is differentially sensed by the
MCP19111. The sense element can be either a resistor
placed in series with the output, or the series resistance
of the inductor. If the inductor series resistance is used,
a filter is needed to remove the large AC component of
the voltage that appears across the inductor and leave
only the small AC voltage that appears across the
inductor resistance, as shown in Figure 3-2. This small
AC voltage is representative of the output current.
FIGURE 3-2:
INDUCTOR CURRENT
SENSE FILTER
VIN
-ISEN
+ISEN
RS
CS
L
RL
HDRV
To Load
PHASE
LDRV
DS22331A-page 16
 2013 Microchip Technology Inc.
MCP19111
The value of RS and CS can be found by using
Equation 3-3. When the current sense filter time
constant is set equal to the inductor time constant, the
voltage appearing across CS approximates the current
flowing in the inductor, multiplied by the inductor
resistance.
EQUATION 3-3:
CALCULATING FILTER
VALUES
L
------ =  R S  C S 
RL
Where:
- L is the inductance value of the output
inductor
- RL is the series resistance of the output
inductor
- RS is the current sense filter resistor
- CS is the current sense filter capacitor
Both AC gain and DC gain can be added to the current
sense signal. Refer to Section 6.3 “Current Sense
AC Gain” and Section 6.4 “Current Sense DC Gain”
for more information.
FIGURE 3-3:
3.7.1
PLACEMENT OF THE CURRENT
SENSE FILTER COMPONENTS
The amplitude of the current sense signal is typically
less than 100 mV peak-to-peak. Therefore, the small
signal current sense traces are very susceptible to
circuit noise. When designing the printed circuit board,
placement of RS and CS is very important. The +ISEN
and -ISEN traces should be routed parallel to each other
with minimum spacing. This Kelvin sense routing
technique helps minimize noise sensitivity. The filter
capacitor (CS), should be placed as close to the
MCP19111 as possible. This will help filter any noise
that is injected onto the current sense lines. The trace
connecting CS to the inductor should occur directly at
the inductor and not at any other +VSEN trace. The filter
resistor (RS), should be placed close to the inductor.
See Figure 3-3 for component placement. Care should
also be taken to avoid routing the +ISEN and -ISEN
traces near the high current switching nodes of the
HDRV, LDRV, PHASE, or BOOST traces. It is
recommended that a ground layer be placed between
these high current traces and the small signal current
sense traces.
CURRENT SENSE FILTER COMPONENT PLACEMENT
-ISEN
+ISEN
CS
RS
To
PHASE
 2013 Microchip Technology Inc.
INDUCTOR
To
Load
DS22331A-page 17
MCP19111
3.8
3.8.1
Protection Features
INPUT UNDER VOLTAGE LOCKOUT
The input under voltage lockout (UVLO) threshold is
configurable by the VINLVL register, Register 6-1.
When the voltage at the VIN pin of the MCP19111 is
below the configurable threshold, the PIR2<VINIF>
flag will be set. This flag is cleared by hardware once
the VIN voltage is greater than the configurable
threshold. By enabling the global interrupts or polling
the VINIF bit, the MCP19111 can be disabled when the
VIN voltage is below the threshold.
Note 1: The UVLO DAC must be enabled by setting the VINLVL<UVLOEN> bit.
2: Interrupt flag bits are set when an interrupt condition occurs, regardless of the
state of its corresponding enable bit or
the Global Enable bit (GIE) of the
INTCON register.
3.8.3
When the output under voltage DAC is enabled by
setting the ABECON<UVDCEN> bit, the voltage
measured between the +VSEN and -VSEN pins is
monitored and compared to the UV threshold
controlled by the OUVCON register (Register 6-12).
When the output voltage is below the threshold, the
PIR2<UVIF> flag will be set. Once set, firmware can
determine how the MCP19111 responds to the fault
condition and it must clear the UVIF flag.
By setting the PE1<UVTEE> bit, the HDRV and LDRV
signals will be asserted low when the UVIF flag is set.
The signals will remain low until the flag is cleared.
Note 1: The UV DAC must be enabled by setting
the ABECON<UVDCEN> bit.
2: Interrupt flag bits are set when an interrupt condition occurs, regardless of the
state of its corresponding enable bit or
the Global Enable bit (GIE) of the
INTCON register.
Some techniques that can be used to disable the
switching of the MCP19111 while the VINIF flag is set
include setting the ATSTCON<DVRDIS> bit, setting
the reference voltage to 0V, setting the PE1<PUEN>
bit, or setting the ATSTCON<HIDIS> and
ATSTCON<LODIS> bits.
3.8.2
OUTPUT OVERCURRENT
The MCP19111 senses the voltage drop across the
high-side MOSFET to determine when an output over
current (OC) exists. This voltage drop is configurable
by the OCCON register (Register 6-2), and is
measured when the high-side MOSFET is conducting.
To avoid false OC events, leading edge blanking is
applied to the measurements. The amount of blanking
is controlled by the OCLEB<1:0> bits in the OCCON
register. See Section 6.2 “Output Overcurrent” for
more information.
When the input voltage is greater than 20V or if the
RDSON of the high-side MOSFET is such that the
programmed overcurrent threshold does not produce
acceptable peak overcurrent protection, an alternative
method must be used to determine an overcurrent
situation. An alternative technique can use the
configurable output under voltage protection and the
PE1<UVTEE> bit to quickly terminate switching when
the output voltage drops because of an overcurrent
event.
Note 1: The OC DAC must be enabled by setting
the OCCON<OCEN> bit.
DS22331A-page 18
OUTPUT UNDER VOLTAGE
3: The output of the remote sense comparator is compared to the UV threshold.
Therefore, the offset in this comparator
should be considered when calculating
the UV threshold.
3.8.4
OUTPUT OVERVOLTAGE
When the output overvoltage DAC is enabled by setting
the ABECON<OVDCEN> bit, the voltage measured
between the +VSEN and -VSEN pins is monitored and
compared to the OV threshold controlled by the
OOVCON register (Register 6-13). When the output
voltage is above the threshold, the PIR2<OVIF> flag
will be set. Once set, firmware can determine how the
MCP19111 responds to the fault condition and it must
clear the OVIF flag.
By setting the PE1<OVTEE> bit, the HDRV and LDRV
signals will be asserted low when the OVIF flag is set.
The signals will remain low until the flag is cleared.
Note 1: The OV DAC must be enabled by setting
the ABECON<UVDCEN> bit.
2: Interrupt flag bits are set when an interrupt condition occurs, regardless of the
state of its corresponding enable bit or
the Global Enable bit (GIE) of the
INTCON register.
3: The output of the remote sense comparator is compared to the OV threshold.
Therefore, the offset in this comparator
should be considered when calculating
the OV threshold.
 2013 Microchip Technology Inc.
MCP19111
3.8.5
OVERTEMPERATURE
The MCP19111 features a hardware
shutdown protection typically set
firmware fault-handling procedure
shutdown the MCP19111 for an
condition.
3.9
overtemperature
at +160°C. No
is required to
overtemperature
PIC Microcontroller Core
Integrated into the MCP19111 is the PIC
microcontroller mid-range core. This is a fully functional
microcontroller, allowing proprietary features to be
implemented. Setting the CONFIG<CP> bit enables
the code protection. The firmware is then protected
from external reads or writes. Various status and fault
bits are available to customize the fault handling
response.
A minimal amount of firmware is required to properly
configure the MCP19111. Section 6.0 “Configuring
the MCP19111” contains detailed information about
each register that needs to be set for the MCP19111
device to operate. To aid in the development of the
required firmware, a Graphical User Interface (GUI)
has been developed. This GUI can be used to quickly
configure the MCP19111 for basic operation.
Customized or proprietary features can then be added
to the GUI generated firmware.
Note 1: The GUI can be found on the MCP19111
product page on www.microchip.com.
2: Microchip's MPLAB X Integrated
Development Environment Software is
required to use the GUI.
The MCP19111 device features firmware debug
support. See Section 30.0 “Development Support”
for more information.
3.10
Miscellaneous Features
3.10.1
DEVICE ADDRESSING
The communication address of the MCP19111 is
stored in the SSPADD register. This value can be
loaded when the device firmware is programmed or
configured by external components. By reading a voltage on a GPIO with the ADC, a device specific address
can be stored into the SSPADD register.
The MCP19111 contains a second address register,
SSPADD2. This is a 7-bit address that can be used as
the SMBus alert address when PMBus communication
is used. See Section 27.0 “Master Synchronous
Serial Port (MSSP) Module” for more information.
3.10.2
DEVICE ENABLE
A GPIO pin can be configured to be a device enable
pin. By configuring the pin as an input, the PORT
register or the interrupt on change (IOC) can be used
to enable the device. Example 3-2 shows how to
configure a GPIO as an enable pin by testing the PORT
register.
EXAMPLE 3-2:
BANKSEL
BSF
BANKSEL
BCF
:
:
:
WAIT_ENABLE:
BANKSEL
BTFSS
GOTO
BANKSEL
BSF
:
:
:
CONFIGURING GPA3 AS DEVICE ENABLE
TRISGPA
TRISGPA, 3
ANSELA
ANSELA, 3
;Set GPA3 as input
;Set GPA3 as digital input
;Insert additional user code here
PORTGPA
PORTGPA, 3
WAIT_ENABLE
ATSTCON
ATSTCON, 0
 2013 Microchip Technology Inc.
;Test GPA3 to see if pulled high
;A high on GPA3 indicated device to be enabled
;Stay in loop waiting for device enable
;Enable the device by enabling drivers
;Insert additional code here
DS22331A-page 19
MCP19111
3.10.3
OUTPUT POWER GOOD
The output voltage measured between the +VSEN and
-VSEN pins can be monitored by the internal ADC. In
firmware, when this ADC reading matches a user
defined power good value, a GPIO can be toggled to
indicate the system output voltage is within a specified
range. Delays, hysteresis and time out values can all
be configured in firmware.
3.10.4
OUTPUT VOLTAGE SOFT-START
During start-up, soft start of the output voltage is
accomplished in firmware. By using one of the internal
timers and incrementing the OVCCON or OVFCON
register on a timer overflow, very long soft start times
can be achieved.
3.10.5
OUTPUT VOLTAGE TRACKING
The MCP19111 can be configured to track another
voltage signal at start-up or shutdown. The ADC is
configured to read a GPIO that has the desired tracking
voltage applied to it. The firmware then handles the
tracking of the internal output voltage reference to this
ADC reading.
3.10.6
MULTI-PHASE SYSTEM
In a multi-phase system the output of each converter is
connected together. There is one master device that
sets the system switching frequency and provides each
slave device with an error signal, in order to regulate
the output to the same value.
The MCP19111 can be configured as a multi-phase
master or slave by the setting of the MLTPH<2:0> bits
in the BUFFCON register (Register 8-2). When set as
a multi-phase master device, the internal switching frequency clock is connected to GPA1 and the output of
the error amplifier is connected to GPB1. The GPIOs
need to be configured as outputs.
When set as a multi-phase slave device, the GPA1 pin
is configured as the CLKPIN function. The switching
frequency clock from the master device must be
connected to GPA1. The slave device will synchronize
its internal switching frequency clock to the master
clock. Phase shift can be applied by setting the
PWMPHL register of the slave device. The slave GPB1
pin is configured as the error signal input pin (EAPIN).
The master error amplifier output must be connected to
GPB1. Gain can be added to the master error amplifier
output signal by the SLVGNCON register setting
(Register 6-8). The slave device will use this master
error signal to regulate the output voltage. When set as
a slave device, GPA1 and GPB1 need to be configured
as inputs. Refer to Section 26.1 “Standard PulseWidth Modulation (PWM) Mode” for additional
information.
3.10.7
MULTIPLE OUTPUT SYSTEM
In a multiple output system, the switching frequency of
each converter should be synchronized to a master
clock to prevent beat frequencies from developing.
Phase shift is often added to the master clock to help
smooth the system input current. The MCP19111 has
the ability to function as a multiple output master or
slave by setting the appropriate MLTPH<2:0> bits in
the BUFFCON register (Register 8-2).
When configured as a multiple output master, the
GPA1 pin is set as the CLKPIN output function. The
internal switching frequency clock is applied to this pin
and is to be connected to the GPA1 pin of the slave
units.
When configured as a multiple output slave, the GPA1
pin is set as the CLKPIN input function. The switching
frequency clock of the master device is connected to
this pin. Phase shift can be applied by appropriately
setting the PWMPHL register of the slave device. Refer
to Section 26.1 “Standard Pulse-Width Modulation
(PWM) Mode”.
Note 1: The ALT_CLKPIN can also be used by
setting the APFCON<CLKSEL> bit.
3.10.8
SYSTEM BENCH TESTING
The MCP19111 is a highly integrated controller. To
facilitate system prototyping, various internal signals
can be measured by configuring the MCP19111 in
bench test mode. To accomplish this, the
ATSTCON<BNCHEN> bit is set. This configures GPA0
as the ANALOG_TEST feature. The signals measured
on GPA0 are controlled by the ASEL<4:0> bits of the
BUFFCON register. See Section 8.0 “System Bench
Testing” for more information.
Note 1: The factory-set calibration words are
write protected even when the
MCP19111 is placed in a Bench Test
mode.
Note 1: The ALT_CLKPIN can also be used by
setting the APFCON<CLKSEL> bit.
DS22331A-page 20
 2013 Microchip Technology Inc.
MCP19111
4.0
ELECTRICAL CHARACTERISTICS
4.1
ABSOLUTE MAXIMUM RATINGS (†)
VIN – VGND .................................................................................................................................................. -0.3V to +32V
VBOOT - VIN ................................................................................................................................................. -0.3V to +6.5V
VPHASE (continuous) ........................................................................................................................ GND – 0.3V to +30V
VPHASE (transient < 100 ns)............................................................................................................. GND – 5.0V to +30V
VDD internally generated ...................................................................................................................................+5V ±20%
VHDRV, HDRV Pin..........................................................................................................+VPHASE – 0.3V to VBOOT + 0.3V
VLDRV, LDRV Pin............................................................................................................. +(VGND – 0.3V) to (VDD + 0.3V)
Voltage on MCLR with respect to GND.................................................................................................... -0.3V to +13.5V
Maximum Voltage: any other pin..................................................................................... +(VGND – 0.3V) to (VDD + 0.3V)
Maximum output current sunk by any single I/O pin ...............................................................................................25 mA
Maximum output current sourced by any single I/O pin ..........................................................................................25 mA
Maximum current sunk by all GPIO ........................................................................................................................65 mA
Maximum current sourced by all GPIO ...................................................................................................................65 mA
ESD protection on all pins (HBM) ........................................................................................................................... 1.0 kV
ESD protection on all pins (MM)  100 V
† Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This
is a stress rating only and functional operation of the device at those or any other conditions above those indicated in
the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods
may affect device reliability.
 2013 Microchip Technology Inc.
DS22331A-page 21
MCP19111
4.2
Electrical Characteristics
Electrical Specifications: Unless otherwise noted, VIN = 12V, VREF = 1.2V, FSW = 300 kHz, TA = +25°C.
Boldface specifications apply over the TA range of -40°C to +125°C.
Parameter
Symbol
Min
Typ
Max
Units
VIN
4.5
—
32
V
Conditions
Input
Input Voltage
IQ
—
5
10
mA
Not switching
Shutdown Current
ISHDN
—
1.8
2.2
mA
Note 4
Adjustable Input Under
Voltage Lockout Range
UVLO
3
—
32
V
VINLVL is a LOG DAC
UVLOHYS
—
13
—
%
Hysteresis applied to
adjustable UVLO setpoint
Overcurrent Minimum
Threshold
OCMIN
—
160
—
mV
Overcurrent Maximum
Threshold
OCMAX
—
620
—
mV
Overcurrent Mid-Scale
Threshold
OCMID
240
400
550
mV
Overcurrent Step Size
Input Quiescent Current
Input Under Voltage
Lockout Hysteresis
Overcurrent
OCSTEP_SIZE
10
15
20
mV
Adjustable OC Leading
Edge Blanking Minimum
Set Point
LEBmin
—
114
—
ns
Adjustable OC Leading
Edge Blanking Maximum
Set Point
LEBmax
—
780
—
ns
Current Sense Minimum
AC Gain
IAC_GAIN
—
0
—
dB
Current Sense Maximum
AC Gain
IAC_GAIN
—
22.8
—
dB
Current Sense AC Gain
Mid Set Point
IAC_GAIN
8.5
11.5
14
dB
Current Sense AC Gain
Step Size
IAC_GAIN_STEP
—
1.5
—
dB
Current Sense AC Gain
Offset Voltage
IAC_OFFSET
-175
9
135
mV
Current Sense Minimum
DC Gain
IDC_GAIN
—
19.5
—
dB
Current Sense Maximum
DC Gain
IDC_GAIN
—
35.7
—
dB
Current Sense DC Gain
Mid Set Point
IDC_GAIN
27
28.6
30.3
dB
Current Sense DC Gain
Step Size
IDC_GAIN_STEP
—
2.3
—
dB
Current Sense
Note 1:
2:
3:
4:
Ensured by design. Not production tested.
VDD-OUT is the voltage present at the VDD pin. VDD is the internally generated bias voltage.
This is the total source current for all GPIO pins combined. Individually, each pin can source a maximum of
25 mA.
PE1 = 0x00h, ABECON = 0x00h, ATSTCON = 0x80h, WPUGPA = 0x00h, WPUGPB = 0x00h, and
SLEEP command issued to PIC core, see SECTION 16.0.
DS22331A-page 22
 2013 Microchip Technology Inc.
MCP19111
4.2
Electrical Characteristics (Continued)
Electrical Specifications: Unless otherwise noted, VIN = 12V, VREF = 1.2V, FSW = 300 kHz, TA = +25°C.
Boldface specifications apply over the TA range of -40°C to +125°C.
Parameter
Symbol
Min
Typ
Max
Units
Conditions
Current Sense DC Gain
Offset Voltage
IDC_OFFSET
1.4
1.56
1.7
V
Voltage for Zero Current
VZC
—
1.45
—
V
VZCCON = 0x80h
Adjustable VOUT Range
VOUT_RANGE
0.5
—
3.6
V
VOUT range with no external
voltage divider
VOUT Coarse Resolution
VOUT_COARSE
10.8
15.8
25.8
mV
VOUT_COARSE_MID
1.85
2.04
2.25
V
VOUT_FINE
—
0.8
1
mV
Adjustable Overvoltage
Range
OVRANGE
0
—
4.5
V
Adjustable Overvoltage
Mid Set Point
OVMID
1.8
2
2.3
V
Adjustable Overvoltage
Resolution
OVR
—
15
—
mV
Adjustable
Under Voltage Range
UVRANGE
0
—
4.5
Adjustable Under Voltage Mid Set Point
UVMID
1.8
2
2.3
V
UVR
—
15
—
mV
AVOL
0.95
1
1.05
V/V
Common Mode Range
VCMR
GND – 0.3
—
VDD + 1.0
V
Common Mode
Reject Ratio
CMRR
—
57
—
dB
VOS
—
40
—
mV
Minimum Zero Frequency
FZERO_MIN
—
350
—
Hz
Maximum Zero Frequency
Voltage Reference
VOUT Coarse
Mid Set Point
VOUT Fine Resolution
Output Overvoltage
Output Under Voltage
Adjustable Under Voltage
Resolution
Remote Sense Differential Amplifier
Closed Loop Voltage
Gain
Differential Amplifier
Offset
Note 1
See Section 9.5 “Calibration
Word 5” and Section 9.6
“Calibration Word 6”
Compensation
FZERO_MAX
—
35000
—
Hz
Minimum Error Amplifier
Gain
GEA_MIN
—
0
—
dB
Maximum Error Amplifier
Gain
GEA_MAX
—
36.15
—
dB
Note 1:
2:
3:
4:
Ensured by design. Not production tested.
VDD-OUT is the voltage present at the VDD pin. VDD is the internally generated bias voltage.
This is the total source current for all GPIO pins combined. Individually, each pin can source a maximum of
25 mA.
PE1 = 0x00h, ABECON = 0x00h, ATSTCON = 0x80h, WPUGPA = 0x00h, WPUGPB = 0x00h, and
SLEEP command issued to PIC core, see SECTION 16.0.
 2013 Microchip Technology Inc.
DS22331A-page 23
MCP19111
4.2
Electrical Characteristics (Continued)
Electrical Specifications: Unless otherwise noted, VIN = 12V, VREF = 1.2V, FSW = 300 kHz, TA = +25°C.
Boldface specifications apply over the TA range of -40°C to +125°C.
Parameter
Symbol
Min
Typ
Max
Units
Conditions
Internal Oscillator
Frequency
FOSC
7.60
8.00
8.40
MHz
Switching Frequency
FSW
—
FOSC/N
—
kHz
Switching Frequency
Range Select
N
5
—
80
—
(N–1)/N
—
%/
100
DTSTEP
—
4
—
ns
RHDRV-SCR
—
1
2.6

Measured at 500 mA
Note 1, High Range
—
2
3.5

Measured at 500 mA
Note 1, Low Range
—
1
2.6

Measured at 500 mA
Note 1, High Range
—
2
3.5

Measured at 500 mA
Note 1, Low Range
—
2
—
A
Note 1, High Range
—
1
—
A
Note 1, Low Range
—
2
—
A
Note 1, High Range
Oscillator
Maximum Duty Cycle
Dead Time Adjustment
Dead Time Step Size
HDRV Output Driver
HDRV Source
Resistance
HDRV Sink Resistance
RHDRV-SINK
HDRV Source Current
IHDRV-SCR
HDRV Sink Current
IHDRV-SINK
HDRV Rise Time
HDRV Fall Time
tRH
tFH
—
1
—
A
Note 1, Low Range
—
15
30
ns
Note 1, CLOAD = 3.3 nF,
High Range
—
15
30
ns
Note 1, CLOAD = 3.3 nF,
High Range
LDRV Output Driver
LDRV
Source Resistance
RLDRV-SCR
—
1
2.5

Measured at 500 mA
Note 1
LDRV Sink Resistance
RLDRV-SINK
—
0.5
1.0

Measured at 500 mA
Note 1
LDRV Source Current
ILDRV-SCR
—
2
—
A
Note 1
LDRV Sink Current
ILDRV-SINK
—
4
—
A
Note 1
LDRV Rise Time
tRL
—
15
30
ns
Note 1, CLOAD = 3.3 nF
LDRV Fall Time
tFL
—
7
15
ns
Note 1, CLOAD = 3.3 nF
Note 1:
2:
3:
4:
Ensured by design. Not production tested.
VDD-OUT is the voltage present at the VDD pin. VDD is the internally generated bias voltage.
This is the total source current for all GPIO pins combined. Individually, each pin can source a maximum of
25 mA.
PE1 = 0x00h, ABECON = 0x00h, ATSTCON = 0x80h, WPUGPA = 0x00h, WPUGPB = 0x00h, and
SLEEP command issued to PIC core, see SECTION 16.0.
DS22331A-page 24
 2013 Microchip Technology Inc.
MCP19111
4.2
Electrical Characteristics (Continued)
Electrical Specifications: Unless otherwise noted, VIN = 12V, VREF = 1.2V, FSW = 300 kHz, TA = +25°C.
Boldface specifications apply over the TA range of -40°C to +125°C.
Parameter
Symbol
Min
Typ
Max
Units
Conditions
VDD
4.6
5.0
5.4
V
VIN = 6.0V to 32V, Note 2
AVDD
—
5.0
—
V
VIN = 6.0V to 32V, Note 2
IDD
30
—
—
mA
Line Regulation
VDD/
(VDD x VIN)
—
0.05
0.1
%/V (VDD+1.0V)  VIN  20V
Note 2
Load Regulation
VDD/VDD
-1.75
-0.8
+0.5
%
IDD_SC
—
65
—
mA
Dropout Voltage
VIN – VDD
—
0.5
1
V
IDD = 30 mA,
VIN = VDD + 1.0V
Note 2
Power Supply
Rejection Ratio
PSRRLDO
—
60
—
dB
f  1000 Hz, IDD = 25 mA,
CIN = 0 µF, CDD = 1 µF
BG
-2.5%
1.23
+2.5%
V
Maximum GPIO
Sink Current
ISINK_GPIO
—
—
90
mA
Note 3, Note 1
Maximum GPIO
Source Current
ISOURCE_GPIO
—
—
90
mA
Note 3, Note 1
GPIO Weak
Pull-up Current
IPULL-UP_GPIO
50
250
400
µA
VDD = 5V
GPIO Output Low
Voltage
VOL
—
—
0.6
V
IOL = 7 mA, VDD= 5V,
TA = +90°C
GPIO Output
High Voltage
VOH
VDD – 0.7
—
—
V
IOH = -2.5 mA, VDD = 5V,
TA = +90°C
GPIO_IIL
—
±0.1
±1
µA
Negative current is defined as
current sourced by the pin,
TA = +90°C
VIL
GND
—
0.8
V
I/O Port with TTL buffer
VDD = 5V, TA = +90°C
GND
0.2VDD
V
I/O Port with Schmitt Trigger
buffer, VDD = 5V, TA = +90°C
GND
0.2VDD
V
MCLR, TA = +90°C
Linear Regulator
Bias Voltage, LDO Output
Internal Circuitry
Bias Voltage
Maximum VDD Output
Current
Output Short
Circuit Current
Band Gap Voltage
VIN = 6.0V to 20V,
VDD = 5.0V,
Note 2
IDD = 1 mA to 30 mA
Note 2
VIN = (VDD + 1.0V)
Note 2
GPIO Pins
GPIO Input
Leakage Current
GPIO Input Low Voltage
Note 1:
2:
3:
4:
Ensured by design. Not production tested.
VDD-OUT is the voltage present at the VDD pin. VDD is the internally generated bias voltage.
This is the total source current for all GPIO pins combined. Individually, each pin can source a maximum of
25 mA.
PE1 = 0x00h, ABECON = 0x00h, ATSTCON = 0x80h, WPUGPA = 0x00h, WPUGPB = 0x00h, and
SLEEP command issued to PIC core, see SECTION 16.0.
 2013 Microchip Technology Inc.
DS22331A-page 25
MCP19111
4.2
Electrical Characteristics (Continued)
Electrical Specifications: Unless otherwise noted, VIN = 12V, VREF = 1.2V, FSW = 300 kHz, TA = +25°C.
Boldface specifications apply over the TA range of -40°C to +125°C.
Parameter
Symbol
Min
Typ
Max
Units
Conditions
GPIO Input High Voltage
VIH
2.0
—
VDD
V
I/O Port with TTL buffer,
VDD = 5V, TA = +90°C
0.8VDD
—
VDD
V
I/O Port with Schmitt Trigger
buffer, VDD = 5V, TA = +90°C
0.8VDD
—
VDD
V
MCLR, TA = +90°C
Thermal Shutdown
Thermal Shutdown
TSHD
—
160
—
°C
Thermal Shutdown
Hysteresis
TSHD_HYS
—
20
—
°C
Note 1:
2:
3:
4:
4.3
Ensured by design. Not production tested.
VDD-OUT is the voltage present at the VDD pin. VDD is the internally generated bias voltage.
This is the total source current for all GPIO pins combined. Individually, each pin can source a maximum of
25 mA.
PE1 = 0x00h, ABECON = 0x00h, ATSTCON = 0x80h, WPUGPA = 0x00h, WPUGPB = 0x00h, and
SLEEP command issued to PIC core, see SECTION 16.0.
Thermal Specifications
Parameter
Symbol
Min
Typ
Max
Units
Specified Temperature Range
TA
-40
—
+125
C
Operating Temperature Range
TA
-40
—
+125
C
Test Conditions
Temperature Ranges
Maximum Junction Temperature
TJ
—
—
+150
C
Storage Temperature Range
TA
-65
—
+150
C
JA
—
35.3
—
C/W
Thermal Package Resistances
Thermal Resistance, 28L-QFN 5x5
DS22331A-page 26
 2013 Microchip Technology Inc.
MCP19111
5.0
DIGITAL ELECTRICAL CHARACTERISTICS
5.1
Timing Parameter Symbology
The timing parameter symbols have been created with
one of the following formats:
1. TppS2ppS
2. TppS
T
F
Frequency
Lowercase letters (pp) and their meanings:
pp
cc
CCP1
ck
CLKOUT
cs
CS
di
SDI
do
SDO
dt
Data in
io
I/O port
mc
MCLR
Uppercase letters and their meanings:
S
F
Fall
H
High
I
Invalid (high-impedance)
L
Low
I2C only
AA
output access
BUF
Bus free
TCC:ST (I2C specifications only)
CC
HD
Hold
ST
DAT
DATA input hold
STA
START condition
FIGURE 5-1:
(I2C specifications only)
(I2C specifications only)
3. TCC:ST
4. Ts
TTime
osc
rd
rw
sc
ss
t0
t1
wr
OSC1
RD
RD or WR
SCK
SS
T0CKI
T1CKI
WR
P
R
V
Z
Period
Rise
Valid
High-impedance
High
Low
High
Low
SU
Setup
STO
STOP condition
LOAD CONDITIONS
Load Condition 1
Load Condition 2
VDD/2
RL
CL
Pin
VSS
CL
Pin
VSS
RL = 464
CL = 50 pF for all GPIO pins
 2013 Microchip Technology Inc.
DS22331A-page 27
MCP19111
5.2
AC Characteristics: MCP19111 (Industrial, Extended)
FIGURE 5-2:
EXTERNAL CLOCK TIMING
Q4
Q1
Q2
Q3
Q4
Q1
OSC
1
2
TABLE 5-1:
Param No.
EXTERNAL CLOCK TIMING REQUIREMENTS
Sym
Characteristic
Min
Typ†
Max
Units
FOSC
Oscillator Frequency(1)
—
8
—
MHz
1
TOSC
2
TCY
Oscillator
Period(1)
Instruction Cycle Time(1)
—
250
—
ns
—
1000
—
ns
Conditions
*
†
These parameters are characterized but not tested.
Data in “Typ” column is at VIN = 12V (VDD = 5V), +25°C unless otherwise stated. These parameters are for
design guidance only and are not tested.
Note 1: Instruction cycle period (TCY) equals four times the input oscillator time base period. All specified values
are based on characterization data for that particular oscillator type under standard operating conditions
with the device executing code.
FIGURE 5-3:
CLKOUT AND I/O TIMING
Q1
Q4
Q2
Q3
OSC
22
23
19
18
I/O Pin
(input)
15
17
I/O Pin
(output)
new value
old value
20, 21
DS22331A-page 28
 2013 Microchip Technology Inc.
MCP19111
TABLE 5-2:
Param
No.
CLKOUT AND I/O TIMING REQUIREMENTS
Sym
Characteristic
17
TosH2ioV OSC1 (Q1 cycle) to
18
TosH2ioI
19
TioV2osH Port input valid to OSC1
(I/O in setup time)
Port out valid
OSC1 (Q2 cycle) to Port input invalid
(I/O in hold time)
Min
Typ†
Max
—
50
150*
ns
Units Conditions
—
—
300
ns
100
—
—
ns
0
—
—
ns
20
TioR
Port output rise time
—
10
40
ns
21
TioF
Port output fall time
—
10
40
ns
22
22A
Tinp
INT pin high
or low time
25
40
—
—
—
—
ns
ns
23
23A
Trbp
Trbp
Port A change INT
high or low time
Tcy
—
—
ns
*
†
These parameters are characterized but not tested.
Data in “Typ” column is at VIN = 12V (VDD = 5V), +25C unless otherwise stated.
FIGURE 5-4:
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP
TIMER TIMING
VDD
MCLR
30
Internal
POR
33
PWRT
Time-out
32
OSC
Time-out
Internal
Reset
Watchdog
Timer
Reset
34
31
34
I/O Pins
 2013 Microchip Technology Inc.
DS22331A-page 29
MCP19111
TABLE 5-3:
Param
No.
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, AND POWER-UP
TIMER REQUIREMENTS
Sym
Characteristic
Typ†
Min
Max
Units
Conditions
30
TMCL
MCLR Pulse Width (low)
2
—
—
µs
VDD = 5V, -40°C to +85°C
31
TWDT
Watchdog Timer Time-out
Period (No Prescaler)
7
18
33
ms
VDD = 5V, -40°C to +85°C
32
TOST
Oscillation Start-up Timer
Period
—
1024TOSC
—
—
TOSC = OSC1 period
33*
TPWRT
Power up Timer Period
(4 x TWDT)
28
64
132
ms
VDD = 5V, -40°C to +85°C
34
TIOZ
I/O high-impedance from MCLR
Low or Watchdog Timer Reset
—
—
2.0
µs
*
†
These parameters are characterized but not tested.
Data in “Typ” column is at VIN = 12V (VDD = 5V), +25°C unless otherwise stated. These parameters are for
design guidance only and are not tested.
FIGURE 5-5:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
41
40
42
TABLE 5-4:
Param
No.
Sym
40*
Tt0H
41*
Tt0L
42*
Tt0P
*
†
TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Characteristic
T0CKI High Pulse Width
T0CKI Low Pulse Width
T0CKI Period
Min
Typ†
Max
Units
No Prescaler
0.5TCY + 20
—
—
ns
With Prescaler
10
—
—
ns
No Prescaler
0.5TCY + 20
—
—
ns
With Prescaler
10
—
—
ns
Greater of:
20 or TCY + 40
N
—
—
ns
Conditions
N = prescale value
(2, 4, ..., 256)
These parameters are characterized but not tested.
Data in “Typ” column is at VIN = 12V (VDD = 5V), +25°C unless otherwise stated. These parameters are for
design guidance only and are not tested.
DS22331A-page 30
 2013 Microchip Technology Inc.
MCP19111
FIGURE 5-6:
PWM TIMING
PWM (CLKPIN)
53
Note:
TABLE 5-5:
54
Refer to Figure 5-1 for load conditions.
PWM REQUIREMENTS
Param
No.
Sym
Characteristic
Min
53*
TccR
PWM (CLKPIN) output rise time
—
10
25
ns
TccF
PWM (CLKPIN) output fall time
—
10
25
ns
54*
*
†
Typ† Max Units
Conditions
These parameters are characterized but not tested.
Data in “Typ” column is at VIN = 12V (VDD = 5V), +25°C unless otherwise stated. Parameters are for design
guidance only and are not tested.
TABLE 5-6:
MCP19111 A/D CONVERTER (ADC) CHARACTERISTICS:
Standard Operating Conditions (unless otherwise stated)
Operating temperature
-40°C  TA  +125°C
Param
No.
Sym
Characteristic
Min
Typ†
Max
Unit
s
AD01
NR
Resolution
—
—
10
AD02
EIL
Integral Error
—
—
1
AD03
EDL
Differential Error
—
—
1
AD04
EOFF Offset Error
—
+3.0
+5.0
AD07
EGN
—
2
5
AD06
AD06A
VREF Reference Voltage(3)
—
AVDD
—
V
AD07
VAIN
Full-Scale Range
GND
—
AVDD
V
AD08
ZAIN
Recommended Impedance
of Analog Voltage Source
—
—
10
k
Gain Error
Conditions
bit
LSb AVDD = 5.0V
LSb No missing codes to 10 bits
AVDD = 5.0V
LSb AVDD = 5.0V
LSb AVDD = 5.0V
* These parameters are characterized but not tested.
† Data in ‘Typ’ column is at VIN = 12V (VDD = 5V), +25°C unless otherwise stated. These parameters are for
design guidance only and are not tested.
Note 1: Total Absolute Error includes integral, differential, offset and gain errors.
2: The A/D conversion result never decreases with an increase in the input voltage and has no missing
codes.
3: When ADC is off, it will not consume any current other than leakage current. The power-down current
specification includes any such leakage from the ADC module.
 2013 Microchip Technology Inc.
DS22331A-page 31
MCP19111
TABLE 5-7:
MCP19111 A/D CONVERSION REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Operating temperature
-40°C  TA  +125°C
Param
No.
Sym
AD130* TAD
Characteristic
A/D Clock Period
A/D Internal RC Oscillator
Period
AD131
TCNV Conversion Time
(not including Acquisition
Time)(1)
Min
Typ†
1.6
—
9.0
µs
TOSC-based, VREF 3.0V
3.0
—
9.0
µs
TOSC-based, VREF full range
3.0
6.0
9.0
µs
ADCS<1:0> = 11 (ADRC mode)
At VDD = 2.5V
1.6
4.0
6.0
µs
At VDD = 5.0V
—
11
—
TAD
Set GO/DONE bit to new data in
A/D Result register
AD132* TACQ Acquisition Time
AD133* TAMP Amplifier Settling Time
AD134 TGO Q4 to A/D Clock Start
Max Units
11.5
—
µs
—
—
5
µs
—
TOSC/2
—
—
—
TOSC/
2 + TCY
—
—
Conditions
If the A/D clock source is selected
as RC, a time of TCY is added
before the A/D clock starts. This
allows the SLEEP instruction to be
executed.
*
†
These parameters are characterized but not tested.
Data in ‘Typ’ column is at VIN = 12V (VDD = 5V), +25°C unless otherwise stated. These parameters are for
design guidance only and are not tested.
Note 1: ADRESH and ADRESL registers may be read on the following TCY cycle.
FIGURE 5-7:
A/D CONVERSION TIMING (NORMAL MODE)
BSF ADCON0, GO
134
1/2 TCY
131
Q4
130
A/D CLK
9
A/D DATA
8
7
6
3
OLD_DATA
ADRES
2
1
0
NEW_DATA
ADIF
GO
SAMPLE
DONE
132
SAMPLING STOPPED
Note 1: If the A/D clock source is selected as RC, a time of TCY is added before the A/D clock starts. This
allows the SLEEP instruction to be executed.
DS22331A-page 32
 2013 Microchip Technology Inc.
MCP19111
FIGURE 5-8:
A/D CONVERSION TIMING (SLEEP MODE)
BSF ADCON0, GO
134
131
Q4
130
A/D CLK
9
A/D DATA
8
7
6
OLD_DATA
ADRES
3
2
1
0
NEW_DATA
ADIF
GO
SAMPLE
DONE
132
SAMPLING STOPPED
Note 1: If the A/D clock source is selected as RC, a time of TCY is added before the A/D clock starts. This
allows the SLEEP instruction to be executed.
 2013 Microchip Technology Inc.
DS22331A-page 33
MCP19111
NOTES:
DS22331A-page 34
 2013 Microchip Technology Inc.
MCP19111
6.0
CONFIGURING THE MCP19111
The MCP19111 is an analog controller with digital
peripheral. This means that device configuration is
handled through register settings instead of adding
external components. The following sections detail how
to set the analog control registers.
6.1
The VINLVL<UVLOEN> bit must be set to enable the
input under voltage lockout circuitry.
Note:
The VINIF interrupt flag bit is set when an
interrupt condition occurs, regardless of
the state of its corresponding enable bit or
the Global Enable bit, GIE, of the INTCON
register.
Input Under Voltage Lockout
The VINLVL register contains the digital value that sets
the input under voltage lockout. When the input voltage
on the VIN pin to the MCP19111 is below this programmed level, the INTCON<VINIF> flag will be set.
This bit is automatically cleared when the MCP19111
VIN voltage rises above this programmed level.
REGISTER 6-1:
VINLVL: INPUT UNDER VOLTAGE LOCKOUT CONTROL REGISTER
R/W-0
U-0
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
UVLOEN
—
UVLO5
UVLO4
UVLO3
UVLO2
UVLO1
UVLO0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
UVLOEN: Under Voltage Lockout DAC Control bit
1 = Under Voltage Lockout DAC is enabled
0 = Under Voltage Lockout DAC is disabled
bit 6
Unimplemented: Read as ‘0’
bit 5-0
UVLO<5:0>: Under Voltage Lockout Configuration bits
UVLO<5:0> = 26.5*ln(UVLOSET_POINT/4)
 2013 Microchip Technology Inc.
x = Bit is unknown
DS22331A-page 35
MCP19111
6.2
Output Overcurrent
The MCP19111 features a cycle-by-cycle peak current
limit. By monitoring the OCIF interrupt flag, custom
overcurrent fault handling can be implemented.
To detect an output overcurrent, the MCP19111 senses
the voltage drop across the high-side MOSFET while it
is conducting. Leading edge blanking is incorporated to
mask the overcurrent measurement for a given amount
of time. This helps prevent false overcurrent readings.
When the input voltage is greater than 20V, or if the
RDSON of the high-side MOSFET is such that the
programmed overcurrent threshold does not produce
acceptable peak overcurrent protection, an alternative
method must be used to determine an output
overcurrent situation. An alternative technique can use
the configurable output under voltage protection and
the PE1<UVTEE> bit to quickly terminate switching
when the output voltage drops because of an
overcurrent event.
When an output overcurrent is sensed, the OCIF flag is
set and the high-side drive signal is immediately
terminated. Without any custom overcurrent handling
implemented, the high-side drive signal will be asserted
high at the beginning of the next clock cycle. If the
overcurrent condition still exists, the high-drive signal
will again be terminated.
The OCIF interrupt flag must be cleared in software.
However, if a subsequent switching cycle without an
overcurrent condition has not occurred, hardware will
immediately set the OCIF interrupt flag.
Register OCCON contains the bits used to configure
both the output overcurrent limit and the amount of
leading edge blanking (see Register 6-2).
The OCCON<OCEN> bit must be set to enable the
input under voltage lockout circuitry.
Note:
The OCIF interrupt flag bit is set when an
interrupt condition occurs, regardless of
the state of its corresponding enable bit or
the Global Enable bit, GIE, of the INTCON
register.
DS22331A-page 36
 2013 Microchip Technology Inc.
MCP19111
REGISTER 6-2:
OCCON: OUTPUT OVERCURRENT CONTROL REGISTER
R/W-0
R/W-0
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
OCEN
OCLEB1
OCLEB0
OOC4
OOC3
OOC2
OOC1
OOC0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
OCEN: Output Overcurrent DAC Control bit
1 = Output Overcurrent DAC is enabled
0 = Output Overcurrent DAC is disabled
bit 6-5
OCLEB<1:0>: Leading Edge Blanking
00 = 114 ns blanking
01 = 213 ns blanking
10 = 400 ns blanking
11 = 780 ns blanking
bit 4-0
OOC<4:0>: Output Overcurrent Configuration bits
00000 = 160 mV drop
00001 = 175 mV drop
00010 = 190 mV drop
00011 = 205 mV drop
00100 = 220 mV drop
00101 = 235 mV drop
00110 = 250 mV drop
00111 = 265 mV drop
01000 = 280 mV drop
01001 = 295 mV drop
01010 = 310 mV drop
01011 = 325 mV drop
01100 = 340 mV drop
01101 = 355 mV drop
01110 = 370 mV drop
01111 = 385 mV drop
10000 = 400 mV drop
10001 = 415 mV drop
10010 = 430 mV drop
10011 = 445 mV drop
10100 = 460 mV drop
10101 = 475 mV drop
10110 = 490 mV drop
10111 = 505 mV drop
11000 = 520 mV drop
11001 = 535 mV drop
11010 = 550 mV drop
11011 = 565 mV drop
11100 = 580 mV drop
11101 = 595 mV drop
11110 = 610 mV drop
11111 = 625 mV drop
 2013 Microchip Technology Inc.
x = Bit is unknown
DS22331A-page 37
MCP19111
6.3
Current Sense AC Gain
The current measured across the inductor is a square
wave that is averaged by the capacitor (CS) connected
between +ISEN and -ISEN. This very small voltage plus
the ripple can be amplified by the current sense AC
gain circuitry. The amount of gain is controlled by the
CSGSCON register.
REGISTER 6-3:
CSGSCON: CURRENT SENSE AC GAIN CONTROL REGISTER
U-0
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
—
Reserved
Reserved
Reserved
CSGS3
CSGS2
CSGS1
CSGS0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
Unimplemented: Read as ‘0’
bit 6-4
Reserved
bit 3-0
CSGS<3:0>: Current Sense AC Gain Setting bits
0000 = 0 dB
0001 = 1.0 dB
0010 = 2.5 dB
0011 = 4.0 dB
0100 = 5.5 dB
0101 = 7.0 dB
0110 = 8.5 dB
0111 = 10.0 dB
1000 = 11.5 dB
1001 = 13.0 dB
1010 = 14.5 dB
1011 = 16.0 dB
1100 = 17.5 dB
1101 = 19.0 dB
1110 = 20.5 dB
1111 = 22.0 dB
DS22331A-page 38
x = Bit is unknown
 2013 Microchip Technology Inc.
MCP19111
6.4
Current Sense DC Gain
DC gain can be added to the sensed inductor current to
allow it to be read by the ADC. The amount of DC gain
added is controlled by the CSDGCON register.
Adding DC gain to the current sense signal used by the
control loop may also be needed in some multi-phase
systems to account for device and component
differences. The CSDGEN bit determines if the gained
current sense signal is added back to the AC current
signal (see Register 6-4). If the CSDGEN bit is cleared,
DC gain can still be added, but the gained signal is not
added back to the AC current signal.
REGISTER 6-4:
CSDGCON: CURRENT SENSE DC GAIN CONTROL REGISTER
R/W-0
U-0
U-0
U-0
R/W-x
R/W-x
R/W-x
R/W-x
CSDGEN
—
—
—
Reserved
CSDG2
CSDG1
CSDG0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
CSDGEN: Current Sense DC Gain Enable bit
1 = DC gain current sense signal used in control loop.
0 = DC gain current sense signal only read by ADC.
bit 6-4
Unimplemented: Read as ‘0’
bit 3
Reserved
bit 2-0
CSDG<2:0>: Current Sense DC Gain Setting bits
000 = 19.5 dB
001 = 21.8 dB
010 = 24.1 dB
011 = 26.3 dB
100 = 28.6 dB
101 = 30.9 dB
110 = 33.2 dB
111 = 35.7 dB
 2013 Microchip Technology Inc.
x = Bit is unknown
DS22331A-page 39
MCP19111
6.5
Voltage for Zero Current
In multi-phase systems it may be necessary to provide
some offset to the sensed inductor current. The
VZCCON register can be used to provide a positive or
negative offset in the sensed current. Typically, the
VZCCON will be set to 0x80h, which corresponds to
the sensed inductor current centered around 1.45V.
However, by adjusting the VZCCON register, this
centered voltage can be shifted up or down by
approximately 3.28 mV per step.
REGISTER 6-5:
VZCCON: VOLTAGE FOR ZERO CURRENT CONTROL REGISTER
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
VZC7
VZC6
VZC5
VZC4
VZC3
VZC2
VZC1
VZC0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
x = Bit is unknown
VZC<7:0>: Voltage for Zero Current Setting bits
00000000 = -420.00 mV Offset
00000001 = -416.72 mV Offset
•
•
•
10000000 = 0 mV Offset
•
•
•
11111110 = +413.12 mV Offset
11111111 = +416.40 mV Offset
DS22331A-page 40
 2013 Microchip Technology Inc.
MCP19111
6.6
FIGURE 6-1:
Compensation Setting
The MCP19111 uses a peak current mode control
architecture. A control reference is used to regulate the
peak current of the converter directly. The inner current
loop essentially turns the inductor into a voltagecontrolled current source. This reduces the control-tooutput transfer function to a simple single-pole model of
a current source feeding a capacitor. The desired
response of the overall loop can be tuned by proper
placement of the compensation zero frequency and
gain. Figure 6-1 shows a simplified drawing of the
internal compensation. See Register 6-6 for the
adjustable zero frequency and gain settings.
REGISTER 6-6:
SIMPLIFIED
COMPENSATION
+VSEN
-VSEN
VREF
CMPZCON: COMPENSATION SETTING CONTROL REGISTER
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
CMPZF3
CMPZF2
CMPZF1
CMPZF0
CMPZG3
CMPZG2
CMPZG1
CMPZG0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
CMPZF<3:0>: Compensation Zero Frequency Setting bits
0000 = 1500 Hz
0001 = 1850 Hz
0010 = 2300 Hz
0011 = 2840 Hz
0100 = 3460 Hz
0101 = 4300 Hz
0110 = 5300 Hz
0111 = 6630 Hz
1000 = 8380 Hz
1001 = 9950 Hz
1010 = 12200 Hz
1011 = 14400 Hz
1100 = 18700 Hz
1101 = 23000 Hz
1110 = 28400 Hz
1111 = 35300 Hz
bit 3-0
CMPZG<3:0>: Compensation Gain Setting bits
0000 = 36.15 dB
0001 = 33.75 dB
0010 = 30.68 dB
0011 = 28.43 dB
0100 = 26.10 dB
0101 = 23.81 dB
0110 = 21.44 dB
0111 = 19.10 dB
1000 = 16.78 dB
1001 = 14.32 dB
1010 = 12.04 dB
1011 = 9.54 dB
1100 = 7.23 dB
1101 = 4.61 dB
1110 = 2.28 dB
1111 = 0.00 dB
 2013 Microchip Technology Inc.
x = Bit is unknown
DS22331A-page 41
MCP19111
6.7
Slope Compensation
A negative voltage slope is added to the output of the
error amplifier. This is done to prevent subharmonic
instability when:
1.
2.
The amount of negative slope added to the error amplifier output is controlled by Register 6-7.
The slope compensation is enabled by setting the
SLCPBY bit in the ABECON register.
the operating duty cycle is greater than 50%
wide changes in the duty cycle occur.
REGISTER 6-7:
SLPCRCON: SLOPE COMPENSATION RAMP CONTROL REGISTER
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
SLPG3
SLPG2
SLPG1
SLPG0
SLPS3
SLPS2
SLPS1
SLPS0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
SLPG<3:0>: Slope Compensation Amplitude Configuration bits
0000 = 0.017 VPK-PK, measured for 50% duty cycle waveform
0001 = 0.022 VPK-PK, measured for 50% duty cycle waveform
0010 = 0.030 VPK-PK, measured for 50% duty cycle waveform
0011 = 0.040 VPK-PK, measured for 50% duty cycle waveform
0100 = 0.053 VPK-PK, measured for 50% duty cycle waveform
0101 = 0.070 VPK-PK, measured for 50% duty cycle waveform
0110 = 0.094 VPK-PK, measured for 50% duty cycle waveform
0111 = 0.125 VPK-PK, measured for 50% duty cycle waveform
1000 = 0.170 VPK-PK, measured for 50% duty cycle waveform
1001 = 0.220 VPK-PK, measured for 50% duty cycle waveform
1010 = 0.300 VPK-PK, measured for 50% duty cycle waveform
1011 = 0.400 VPK-PK, measured for 50% duty cycle waveform
1100 = 0.530 VPK-PK, measured for 50% duty cycle waveform
1101 = 0.700 VPK-PK, measured for 50% duty cycle waveform
1110 = 0.940 VPK-PK, measured for 50% duty cycle waveform
1111 = 1.250 VPK-PK, measured for 50% duty cycle waveform
bit 3-0
SLPS<3:0>: Slope Compensation V/t Configuration bits
6.7.1
SLPS<3:0> CONFIGURATION
The SLPS<3:0> directly controls the V/t of the
added ramp. This byte should be set proportional to
the switching frequency according to the following
equation.
F SW
n =  --------------------- – 1
100 000
6.7.2
x = Bit is unknown
SLPG<3:0> CONFIGURATION
The SLPG<3:0> controls the amplitude of the added
ramp. The values listed above correspond to a 50%
duty cycle waveform and is true only if the SLPS<3:0>
bits are set according to the equation in Section 6.7.1
“SLPS<3:0> Configuration”. If less amplitude is
required, the SLPS<3:0> bits can be adjusted to a
lower switching frequency.
Where:
FSW = Device switching frequency
n = Decimal equivalent of SLPS<3:0>
DS22331A-page 42
 2013 Microchip Technology Inc.
MCP19111
6.8
MASTER Error Signal Gain
Note:
When operating in a multi-phase system, the output of
the MASTER’s error amplifier is used by all SLAVE
devices as their control signal. It is important to balance
the current in all phases to maintain a uniform
temperature across all phases. Component tolerances
make this balancing difficult. Each SLAVE device has
the ability to gain or attenuate the MASTER error signal
depending upon the settings of Register 6-8.
REGISTER 6-8:
The SLVGNCON register is configured in
the multi-phase SLAVE device.
SLVGNCON: MASTER ERROR SIGNAL INPUT GAIN CONTROL REGISTER
U-0
U-0
U-0
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
—
—
—
SLVGN4
SLVGN3
SLVGN2
SLVGN1
SLVGN0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
SLVGN<4:0>: MASTER Error Signal Gain bits
00000 = -3.3 dB
00001 = -3.1 dB
00010 = -2.9 dB
00011 = -2.7 dB
00100 = -2.5 dB
00101 = -2.3 dB
00110 = -2.1 dB
00111 = -1.9 dB
01000 = -1.7 dB
01001 = -1.4 dB
01010 = -1.2 dB
01011 = -1.0 dB
01100 = -0.8 dB
01101 = -0.6 dB
01110 = -0.4 dB
01111 = -0.2 dB
10000 = 0.0 dB
10001 = 0.2 dB
10010 = 0.4dB
10011 = 0.7 dB
10100 = 0.9 dB
10101 = 1.1 dB
10110 = 1.3 dB
10111 = 1.5 dB
11000 = 1.7 dB
11001 = 1.9 dB
11010 = 2.1 dB
11011 = 2.3 dB
11100 = 2.6 dB
11101 = 2.8 dB
11110 = 3.0 dB
11111 = 3.2 dB
 2013 Microchip Technology Inc.
x = Bit is unknown
DS22331A-page 43
MCP19111
6.9
MOSFET Driver Programmable
Dead Time
FIGURE 6-2:
The turn-on delay of the high-side and low-side drive
signals can be configured independently to allow different MOSFETs and circuit board layouts to be used to
construct an optimized system. See Figure 6-2.
HDRV
Setting the HDLYBY and LDLYBY bits of the PE1
register enables the high-side and low-side delay,
respectively. The amount of delay added is controlled
in the DEADCON register. See Register 6-9 for more
information.
REGISTER 6-9:
MOSFET DRIVER
DEAD TIME
HDLY
LDLY
LDRV
DEADCON: DRIVER DEAD TIME CONTROL REGISTER
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
HDLY3
HDLY2
HDLY1
HDLY0
LDLY3
LDLY2
LDLY1
LDLY0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
HDLY<3:0>: High-Side Dead Time Configuration bits
0000 = 11 ns delay
0001 = 15 ns delay
0010 = 19 ns delay
0011 = 23 ns delay
0100 = 27 ns delay
0101 = 31 ns delay
0110 = 35 ns delay
0111 = 39 ns delay
1000 = 43 ns delay
1001 = 47 ns delay
1010 = 51 ns delay
1011 = 55 ns delay
1100 = 59 ns delay
1101 = 63 ns delay
1110 = 67 ns delay
1111 = 71 ns delay
bit 3-0
LDLY<3:0>: Low-Side Dead Time Configuration bits
0000 = 4 ns delay
0001 = 8 ns delay
0010 = 12 ns delay
0011 = 16 ns delay
0100 = 20 ns delay
0101 = 24 ns delay
0110 = 28 ns delay
0111 = 32 ns delay
1000 = 36 ns delay
1001 = 40 ns delay
1010 = 44 ns delay
1011 = 48 ns delay
1100 = 52 ns delay
1101 = 56 ns delay
1110 = 60 ns delay
1111 = 64 ns delay
DS22331A-page 44
x = Bit is unknown
 2013 Microchip Technology Inc.
MCP19111
6.10
Output Voltage Configuration
Note:
Two registers control the error amplifier reference
voltage. The reference is coarsely set in 15 mV steps
and then finely adjusted in 0.82 mV steps above the
coarse setting (see Registers 6-10 and 6-11). Higher
output voltages can be achieved by using a voltage
divider connected between the output and the +VSEN
pin. Care must be taken to ensure maximum voltage
rating compliance on all pins.
REGISTER 6-10:
The OVFCON<VOUTEN> bit must be set
to enable the output voltage setting
registers.
OVCCON: OUTPUT VOLTAGE SET POINT COARSE CONTROL REGISTER
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
OVC7
OVC6
OVC5
OVC4
OVC3
OVC2
OVC1
OVC0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
x = Bit is unknown
OVC<7:0>: Output Voltage Set Point Coarse Configuration bits
OVC<7:0> = (VOUT/15.8 mV)+15.8 mV
REGISTER 6-11:
OVFCON: OUTPUT VOLTAGE SET POINT FINE CONTROL REGISTER
R/W-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
VOUTEN
—
—
OVF4
OVF3
OVF2
OVF1
OVF0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
VOUTEN: Output Voltage DAC Enable bit
1 = Output Voltage DAC is enabled
0 = Output Voltage DAC is disabled
bit 6-5
Unimplemented: Read as ‘0’
bit 4-0
OVF<4:0>: Output Voltage Set Point Coarse Configuration bits
OVF<4:0> = (VOUT – VOUT_COARSE)/0.8 mV
 2013 Microchip Technology Inc.
x = Bit is unknown
DS22331A-page 45
MCP19111
6.11
Output Under Voltage
The output voltage is monitored, and when it is below
the output under voltage threshold, the UVIF flag is set.
This flag must be cleared in software. See
Section 15.3.1.4 “PIR2 Register” for more
information.
The output under voltage threshold is controlled by the
OUVCON register, as shown in Register 6-12.
REGISTER 6-12:
OUVCON: OUTPUT UNDER VOLTAGE DETECT LEVEL CONTROL REGISTER
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
OUV7
OUV6
OUV5
OUV4
OUV3
OUV2
OUV1
OUV0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
6.12
x = Bit is unknown
OUV<7:0>: Output Under Voltage Detect Level Configuration bits
OUV<7:0> = (VOUT_UV_Detect_Level)/15 mV
Output Overvoltage
The output voltage is monitored, and when it is above
the output over voltage threshold, the OVIF flag is set.
This flag must be cleared in software. See
Section 15.3.1.4 “PIR2 Register” for more
information.
The output over voltage threshold is controlled by the
OOVCON register, as shown in Register 6-13.
REGISTER 6-13:
OOVCON: OUTPUT OVERVOLTAGE DETECT LEVEL CONTROL REGISTER
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
OOV7
OOV6
OOV5
OOV4
OOV3
OOV2
OOV1
OOV0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
x = Bit is unknown
OOV<7:0>: Output Overvoltage Detect Level Configuration bits
OOV<7:0> = (VOUT_OV_Detect_Level)/15 mV
DS22331A-page 46
 2013 Microchip Technology Inc.
MCP19111
6.13
Analog Peripheral Control
The MCP19111 has various analog peripherals. These
peripherals can be configured to allow customizable
operation. Refer to Register 6-14 more information.
6.13.1
DIODE EMULATION MODE
The MCP19111 can operate in either diode emulation
or synchronous rectification mode. When operating in
diode emulation mode, the LDRV signal is terminated
when the voltage across the low-side MOSFET is
approximately 0V. This condition is true when the
inductor current reaches approximately 0A. Both the
HDRV and LDRV signals are low until the beginning of
the next switching cycle. At that time, the HDRV signal
is asserted high, turning on the high-side MOSFET.
When operating in Synchronous Rectification mode,
the LDRV signal is held high until the beginning of the
next switching cycle. At that time, the HDRV signal is
asserted high, turning on the high-side MOSFET.
6.13.4
OUTPUT VOLTAGE SENSE
PULL-UP/PULL-DOWN
A high-impedance pull-up on the +VSEN pin can be
configured by setting the PE1<PUEN> bit. When set,
the +VSEN pin is internally pulled-up to VDD.
A high-impedance pull-down on the -VSEN can be
configured by setting the PE1<PDEN> bit. When set,
the -VSEN pin is internally pulled-down to ground.
6.13.5
OUTPUT UNDER VOLTAGE
ACCELERATOR
The MCP19111 has additional control circuitry to allow
it to respond quickly to an output under voltage
condition. The enabling of this circuitry is handled by
the PE1<UVTEE> bit. When this bit is set, the
MCP19111 will respond to an output under voltage
condition by setting both the HDRV and LDRV signals
low and turning off both the high-side and low-side
MOSFETs.
The PE1<DECON> bit controls the operating mode of
the MCP19111.
6.13.6
6.13.2
The MCP19111 has additional control circuitry to allow
it to respond quickly to an output over voltage
condition. The enabling of this circuitry is handled by
the PE1<OVTEE> bit. When this bit is set, the
MCP19111 will respond to an output overvoltage
condition by setting both the HDRV and LDRV signals
low and turning off both the high-side and low-side
MOSFETs.
HIGH-SIDE DRIVE STRENGTH
The peak source and sink current of the high-side
driver can be configured to either be 1A source/sink or
2A source/sink. The PE1<DVRSTR> bit determines
the high-side drive strength.
6.13.3
MOSFET DRIVER DEAD TIME
As described in Section 6.9 “MOSFET Driver
Programmable Dead Time”, the MOSFET drive dead
time can be adjusted. In order to enable dead time
settings, the proper bypass bits must be cleared.
PE1<HDLYBY> and PE1<LDLYBY> control the delay
circuits. Clearing the respective bits allows the dead
time programmed by the DEADCON register to be
added to the appropriate turn-on edge.
 2013 Microchip Technology Inc.
OUTPUT OVERVOLTAGE
ACCELERATOR
DS22331A-page 47
MCP19111
REGISTER 6-14:
PE1: ANALOG PERIPHERAL ENABLE 1 CONTROL REGISTER
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
DECON
DVRSTR
HDLYBY
LDLYBY
PDEN
PUEN
UVTEE
OVTEE
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
DECON: Diode Emulation Mode bit
1 = Diode emulation mode enabled
0 = Synchronous rectification mode enabled
bit 6
DVRSTR: High-Side Drive Strength Configuration bit
1 = High-side 1A source/sink drive strength
0 = High-side 2A source/sink drive strength
bit 5
HDLYBY: High-Side Dead Time Bypass bit
1 = High-side dead time bypass is enabled
0 = High-side dead time bypass is disabled
bit 4
LDLYBY: Low-Side Dead Time Bypass bit
1 = Low-side dead time bypass is enabled
0 = Low-side dead time bypass is disabled
bit 3
PDEN: -VSEN Weak Pull Down Enable bit
1 = -VSEN weak pull down is enabled
0 = -VSEN weak pull down is disabled
bit 2
PUEN: +VSEN Weak Pull Up Enable bit
1 = +VSEN weak pull up is enabled
0 = +VSEN weak pull up is disabled
bit 1
UVTEE: Output Under Voltage Accelerator Enable bit
1 = Output under voltage accelerator is enabled
0 = Output under voltage accelerator is disabled
bit 0
OVTEE: Output Over Voltage Accelerator Enable bit
1 = Output over voltage accelerator is enabled
0 = Output over voltage accelerator is disabled
DS22331A-page 48
x = Bit is unknown
 2013 Microchip Technology Inc.
MCP19111
6.14
Analog Blocks Enable Control
Various analog circuit blocks can be enabled or
disabled, as shown in Register 6-15. Addition enable
bits are located in the ATSTCON register.
6.14.1
OUTPUT OVERVOLTAGE ENABLE
The output overvoltage is enabled by setting the
ABECON<OVDCEN> bit. Clearing this bit will disable
the output overvoltage circuitry and cause the setting in
the OOVCON register to be ignored.
6.14.2
OUTPUT UNDER VOLTAGE
ENABLE
The output under voltage is enabled by setting the
ABECON<UVDCEN> bit. Clearing this bit will disable
the output under voltage circuitry and cause the setting
in the OUVCON register to be ignored.
6.14.3
RELATIVE EFFICIENCY
MEASUREMENT CONTROL
6.14.6
INTERNAL TEMPERATURE
MEASUREMENT CONTROL
The internal temperature of the silicon can be
measured with the ADC. To enable the internal
temperature
measurement
circuitry,
the
ABECON<TMPSEN> bit must be set.
6.14.7
RELATIVE EFFICIENCY CIRCUITY
CONTROL
Section 10.0 “Relative Efficiency Measurement”
describes the procedure used to measure the relative
efficiency
of
the
system.
Setting
the
ABECON<RECIREN> bit enables the relative
efficiency measurement circuitry.
6.14.8
SIGNAL CHAIN CONTROL
Setting the ABECON<PATHEN> bit enables the
voltage control path. Under normal operation, this bit is
set.
Section 10.0 “Relative Efficiency Measurement”
describes the procedure used to measure the relative
efficiency
of
the
system.
Setting
the
ABECON<MEASEN> bit initiates the relative
measurement.
6.14.4
SLOPE COMPENSATION CONTROL
The slope compensation described in Register 6-7 can
be bypassed by setting the ABECON<SLCPBY> bit.
Under normal operation, this bit will always be set.
6.14.5
CURRENT MEASUREMENT
CONTROL
The peak current measurement circuitry is controlled
by the ABECON<CRTMEN> bit. Setting this bit
enables the current measurement circuitry. Under
normal operation, this bit will be set.
 2013 Microchip Technology Inc.
DS22331A-page 49
MCP19111
REGISTER 6-15:
ABECON: ANALOG BLOCK ENABLE CONTROL REGISTER
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
OVDCEN
UVDCEN
MEASEN
SLCPBY
CRTMEN
TMPSEN
RECIREN
PATHEN
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
OVDCEN: Output over voltage DAC control bit
1 = Output over voltage DAC is enabled
0 = Output over voltage DAC is disabled
bit 6
UVDCEN: Output under voltage DAC control bit
1 = Output under voltage DAC is enabled
0 = Output under voltage DAC is disabled
bit 5
MEASEN: Relative efficiency measurement control bit
1 = Initiate relative efficiency measurement
0 = Relative efficiency measurement not in progress
bit 4
SLCPBY: Slope compensation bypass control bit
1 = Slope compensation is disabled
0 = Slope compensation is enabled
bit 3
CRTMEN: Current measurement circuitry control bit
1 = Current measurement circuitry is enabled
0 = Current measurement circuitry is disabled
bit 2
TMPSEN: Internal temperature sensor control bit
1 = Internal temperature sensor circuitry is enabled
0 = Internal temperature sensor circuitry is disabled
bit 1
RECIREN: Relative efficiency circuitry control bit
1 = Relative efficiency measurement circuitry is enabled
0 = Relative efficiency measurement circuitry is disabled
bit 0
PATHEN: Signal chain circuitry control bit
1 = Signal chain circuitry is enabled
0 = Signal chain circuitry is disabled
DS22331A-page 50
x = Bit is unknown
 2013 Microchip Technology Inc.
MCP19111
7.0
TYPICAL PERFORMANCE CURVES
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore, outside the warranted range.
Note: Unless otherwise indicated, VIN = 12V, FSW = 300 kHz, TA = +25°C.
1.0
5.6
0.8
Quiesc
cent Current (mA)
5.4
0.6
INL (LSB)
5.2
5.0
4.8
4.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
4.4
-0.8
4.2
-40 -25 -10
5
20
35
50
65
80
-1.0
95 110 125
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
CODE
Temperature (ºC)
FIGURE 7-1:
IQ vs. Temperature.
FIGURE 7-4:
OVFCON DAC INL vs.
Code and Temperature (-40°C to +125°C).
0.2
0.0016
0.0
0.0014
0.0012
DNL (LSB)
INL (LSB)
-0.2
-0.4
-0.6
0.0010
0.0008
0.0006
-0.8
0.0004
-1.0
0.0002
0.0000
-1.2
0
64
128
CODE
192
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
CODE
256
FIGURE 7-2:
OVCCON DAC INL vs.
Code and Temperature (-40°C to +125°C).
FIGURE 7-5:
OVFCON DAC DNL vs.
Code and Temperature (-40°C to +125°C).
0.030
5.09
0.025
5.08
0.020
5.07
-40ºC
VDD (V)
DNL (LSB)
IDD = 1 mA
0.015
+125ºC
5.06
0.010
5.05
0.005
+25ºC
5.04
0
64
128
CODE
192
256
FIGURE 7-3:
OVCCON DAC DNL vs.
Code and Temperature (-40°C to +125°C).
 2013 Microchip Technology Inc.
6
8 10 12 14 16 18 20 22 24 26 28 30 32
Input Voltage, VIN (V)
FIGURE 7-6:
VDD vs. Input Voltage.
DS22331A-page 51
MCP19111
Note: Unless otherwise indicated, VIN = 12V, FSW = 300 kHz, TA = +25°C.
5.07
5.06
3.35
3.33
5.04
5.03
- 40ºC
+25ºC
VREGREF (V)
VDD (V)
5.05
5.02
OVCCON = 0xDCh
3.34
+125ºC
3.32
3.31
3.30
3.29
3.28
5.01
3.27
5.00
3.26
4.99
3.25
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
Current (mA)
FIGURE 7-7:
VDD vs. Output Current.
-40 -25 -10
20 35 50 65 80 95 110 125
Temperature (ºC)
FIGURE 7-10:
VREGREF vs. Temperature
(VREGREF = 3.3V).
80
OVCCON = 0x28h
0.62
0.61
0.60
0 59
0.59
HD
DRV Dead Time (ns)
0.63
VREGREF (V)
5
70
60
50
-40ºC
40
125ºC
+125ºC
30
0.58
20
0.57
10
+25ºC
-40 -25 -10
5
0
20 35 50 65 80 95 110 125
Temperature (ºC)
FIGURE 7-8:
VREGREF vs. Temperature
(VREGREF = 0.6V).
2
4
FIGURE 7-11:
HDLY Code.
1.84
6
8
10
HDLY CODE
14
16
HDRV Dead Time vs.
70
OVCCON = 0x78h
+25ºC
LDR
RV Dead Time (ns)
1.83
1.82
VREGREF (V)
12
1.81
1.80
1.79
1.78
60
50
40
+125ºC
30
20
-40ºC
10
1.77
-40 -25 -10
5
20 35 50 65 80 95 110 125
Temperature (ºC)
FIGURE 7-9:
VREGREF vs. Temperature
(VREGREF = 1.8V).
DS22331A-page 52
0
0
2
FIGURE 7-12:
LDLY Code.
4
6
8
10
LDLY CODE
12
14
16
LDRV Dead Time vs.
 2013 Microchip Technology Inc.
MCP19111
Note: Unless otherwise indicated, VIN = 12V, FSW = 300 kHz, TA = +25°C.
1.4
8.05
DRVSTR = 0
Oscillattor Frequency (MHz)
HDR
RV Resistance ()
1.3
1.2
1.1
1.0
RHDRV-SOURCE
0.9
0.8
0.7
0.6
RHDRV-SINK
0.5
0.4
-40 -25 -10
5
FIGURE 7-13:
Temperature.
CR
RNT Voltage (V)
HDR
RV Resistance ()
RHDRV-SOURCE
1.5
1.0
RHDRV-SINK
0.5
-40 -25 -10
5
FIGURE 7-14:
Temperature.
HDRV RDSon vs.
RLDRV-SOURCE
1.0
0.8
0.6
RLDRV-SINK
0.2
-40 -25 -10
FIGURE 7-15:
Temperature.
5
7.99
7.98
7.97
7.96
1.64
1.63
1.62
1.61
1.60
1.59
1.58
1.57
1.56
1.55
1.54
1.53
20 35 50 65 80 95 110 125
Temperature (ºC)
LDRV RDSon vs.
 2013 Microchip Technology Inc.
5
20 35 50 65 80 95 110 125
Temperature (ºC)
Oscillator Frequency vs.
RIND = 3.0 m
0
5
10
15
20
Output Current (A)
FIGURE 7-17:
Current.
Percen
ntage of Occurences
LDR
RV Resistance ()
1.4
0.4
8.00
20 35 50 65 80 95 110 125
Temperature (ºC)
1.6
1.2
8.01
FIGURE 7-16:
Temperature.
DRVSTR = 1
2.0
8.02
-40 -25 -10
3.0
2.5
8.03
7.95
20 35 50 65 80 95 110 125
Temperature (ºC)
HDRV RDSon vs.
8.04
25
30
CRNT Voltage vs. Output
24%
22%
20%
18%
16%
14%
12%
10%
8%
6%
4%
2%
0%
30
38
FIGURE 7-18:
CMRR.
47
56
64
73
CMRR (dB)
81
90
100
Remote Sense Amplifier
DS22331A-page 53
MCP19111
NOTES:
DS22331A-page 54
 2013 Microchip Technology Inc.
MCP19111
8.0
SYSTEM BENCH TESTING
8.1
To allow for easier system design and bench testing,
the MCP19111 device features a multiplexer used to
output various internal analog signals. These signals
can be measured on the GPA0 pin through a unity gain
buffer. The configuration control of the GPA0 pin is
found in the ATSTCON register, as shown in
Register 8-1.
Control of the signals present at the output of the unity
gain buffer is found in the BUFFCON register, as shown
in Register 8-2.
REGISTER 8-1:
8.1.1
Analog Bench Test Control
ATSTCON REGISTER
The ATSTCON register contains the bits used to disable the MOSFET drivers and configure the GPA0 pin
as the unity gain buffer out, as shown in Register 8-1.
Note 1: The DRVDIS bit is reset to ‘1’ so the highside and low-side drivers are in a known
state after reset. This bit must be cleared
by software for normal operation.
ATSTCON: ANALOG BENCH TEST CONTROL REGISTER
R/W-1
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-1
Reserved
—
—
Reserved
HIDIS
LODIS
BNCHEN
DRVDIS
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
Reserved
bit 6-5
Unimplemented: Read as ‘0’
bit 4
Reserved
bit 3
HIDIS: High-side driver control bit
1 = High-side driver is disabled
0 = High-side driver is enabled
bit 2
LODIS: Low-side driver control bit
1 = Low-side driver is disabled
0 = low-side driver is enabled
bit 1
BNCHEN: GPA0 bench test configuration control bit
1 = GPA0 is configured for analog bench test output
0 = GPA0 is configured for normal operation
bit 0
DRVDIS: MOSFET driver disable control bit
1 = High-side and low-side drivers are set low, PHASE pin is floating
0 = High-side and low-side drivers are set for normal operation
 2013 Microchip Technology Inc.
x = Bit is unknown
DS22331A-page 55
MCP19111
8.2
Unity Gain Buffer
When measuring signals with the unity gain buffer, the
buffer offset must be added to the measured signal.
The factory measured buffer offset can be read from
memory location 2087h. Refer to Section 11.1.1
“Reading Program Memory as Data” for more information.
The unity gain buffer module is used during a multiphase application and while operating in Bench Test
mode.
When the ATSTCON<BNCHEN> bit is set, the device
is in Bench Test mode and the ASEL<4:0> bits of the
BUFFCON register determine which internal analog
signal can be measured on the GPA0 pin.
REGISTER 8-2:
BUFFCON: UNITY GAIN BUFFER CONTROL REGISTER
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
MLTPH2
MLTPH1
MLTPH0
ASEL4
ASEL3
ASEL2
ASEL1
ASEL0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-5
MLTPH<2:0>: System configuration bits
000 = Device set as stand-alone unit
001 = Device set as multiple output MASTER
010 = Device set as multiple output SLAVE
011 = Device set as multi-phase MASTER
100 = Device set as multi-phase SLAVE
bit 4-0
ASEL<4:0>: Multiplexer output control bit
00000 = Voltage proportional to current in the inductor
00001 = Error amplifier output plus slope compensation, input to PWM comparator
00010 = Input to slope compensation circuitry
00011 = Band gap reference
00100 = Output voltage reference
00101 = Output voltage after internal differential amplifier
00110 = Unimplemented
00111 = Voltage proportional to the internal temperature
01000 = Internal ground for current sense circuitry, see Section 6.5 “Voltage for Zero Current”
01001 = Output overvoltage comparator reference
01010 = Output under voltage comparator reference
01011 = Error amplifier output
01100 = For a multi-phase SLAVE, error amplifier signal received from MASTER
01101 = For multi-phase SLAVE, error signal received from MASTER with gain,
see Section 6.8 “MASTER Error Signal Gain”
01110 = VIN divided down by 1/5
01111 = DC inductor valley current
10000 = Unimplemented
•
•
•
11100 = Unimplemented
11101 = Overcurrent reference
11110 = Unimplemented
11111 = Unimplemented
DS22331A-page 56
 2013 Microchip Technology Inc.
MCP19111
9.0
DEVICE CALIBRATION
9.1
Calibration Word 1
The DOV<3:0> bits at memory location 2080h set the
offset calibration for the output voltage remote sense
differential amplifier. Firmware must read these values
and write them to the DOVCAL register for proper
calibration.
Read-only memory locations 2080h through 208Fh
contain factory calibration data. Refer to Section 18.0
“Flash Program Memory Control” for information on
how to read from these memory locations.
The FCAL<6:0> bits at memory location 2080h set the
internal oscillator calibration. Firmware must read
these values and write them to the OSCCAL register
for proper calibration.
REGISTER 9-1:
CALWD1: CALIBRATION WORD 1 REGISTER
U-0
U-0
R/P-1
R/P-1
R/P-1
R/P-1
—
—
DOV3
DOV2
DOV1
DOV0
bit 13
bit 8
U-0
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
—
FCAL6
FCAL5
FCAL4
FCAL3
FCAL2
FCAL1
FCAL0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 13-12
Unimplemented: Read as ‘0’
bit 11-8
DOV<3:0>: Output voltage remote sense differential amplifier offset calibration bits.
bit 7
Unimplemented: Read as ‘0’
bit 6-0
FCAL<6:0>: Internal oscillator calibration bits.
 2013 Microchip Technology Inc.
DS22331A-page 57
MCP19111
9.2
Calibration Word 2
The TTA<3:0> bits at memory location 2082h calibrate
the overtemperature shutdown threshold point. Firmware must read these values and write them to the
TTACAL register for proper calibration.
The BGR<3:0> bits at memory location 2082h calibrate
the internal band gap. Firmware must read these
values and write them to the BGRCAL register for
proper calibration.
REGISTER 9-2:
CALWD2: CALIBRATION WORD 2 REGISTER
U-0
U-0
R/P-1
R/P-1
R/P-1
R/P-1
—
—
TTA3
TTA2
TTA1
TTA0
bit 13
bit 8
U-0
U-0
U-0
U-0
R/P-1
R/P-1
R/P-1
R/P-1
—
—
—
—
BGR3
BGR2
BGR1
BGR0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 13-12
Unimplemented: Read as ‘0’
bit 11-8
TTA<3:0>: Overtemperature shutdown threshold calibration bits.
bit 7-4
Unimplemented: Read as ‘0’
bit 3-0
BGR<3:0>: Internal band gap calibration bits.
DS22331A-page 58
x = Bit is unknown
 2013 Microchip Technology Inc.
MCP19111
9.3
Calibration Word 3
The VRO<3:0> bits at memory location 2083h calibrate
the offset of the buffer amplifier of the output voltage
regulation reference set point. This effectively changes
the band gap reference. Firmware must read these
values and write them to the VROCAL register for
proper calibration.
The ZRO<3:0> bits at memory location 2083h calibrate
the offset of the error amplifier. Firmware must read
these values and write them to the ZROCAL register for
proper calibration.
REGISTER 9-3:
CALWD3: CALIBRATION WORD 3 REGISTER
U-0
U-0
R/P-1
R/P-1
R/P-1
R/P-1
—
—
VRO3
VRO2
VRO1
VRO0
bit 13
bit 8
U-0
U-0
U-0
U-0
R/P-1
R/P-1
R/P-1
R/P-1
—
—
—
—
ZRO3
ZRO2
ZRO1
ZRO0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 13-12
Unimplemented: Read as ‘0’
bit 11-8
VRO<3:0>: Reference voltage offset calibration bits.
bit 7-4
Unimplemented: Read as ‘0’
bit 3-0
ZRO<3:0>: Error amplifier offset voltage calibration bits.
 2013 Microchip Technology Inc.
x = Bit is unknown
DS22331A-page 59
MCP19111
9.4
Calibration Word 4
The TANA<9:0> bits at memory location 2084h contain
the ADC reading from the internal temperature sensor
when the silicon temperature is at +30°C. The
temperature coefficient of the internal temperature
sensor is 16 mV/°C.
REGISTER 9-4:
CALWD4: CALIBRATION WORD 4 REGISTER
U-0
U-0
U-0
U-0
R/P-1
R/P-1
—
—
—
—
TANA9
TANA8
bit 13
bit 8
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
TANA7
TANA6
TANA5
TANA4
TANA3
TANA2
TANA1
TANA0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 13-10
Unimplemented: Read as ‘0’
bit 9-0
TANA<9:0>: ADC internal temperature sensor at +30°C calibration bits
TANA<9:0> = (Temperature x 13.3 mV/°C) +1.75
DS22331A-page 60
 2013 Microchip Technology Inc.
MCP19111
9.5
Calibration Word 5
The DIFC<7:0> bits at memory location 2085h contain
the offset voltage information for the output voltage
difference amplifier. The value is an 8-bit two’s
complement number that represents the number of the
OVCCON counts needed to adjust for the differential
amplifier offset. This value can be used to completely
remove the differential amplifier offset.
For example, the offset of the differential amplifier is
measured to be -64 mV. Since one OVCCON count
equals 16 mV, this represents 4 counts of the
OVCCON register. Therefore, the value stored at
location 2085h would be 0x84h, where the setting of
the DIFC7 bit represents a negative number.
REGISTER 9-5:
CALWD5: CALIBRATION WORD 5 REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
bit 13
bit 8
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
DIFC7
DIFC6
DIFC5
DIFC4
DIFC3
DIFC2
DIFC1
DIFC0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 13-8
Unimplemented: Read as ‘0’
bit 7-0
DIFC<7:0>: OVCCON counts to adjust for differential amplifier offset calibration bits
 2013 Microchip Technology Inc.
DS22331A-page 61
MCP19111
9.6
Calibration Word 6
The DIFF<7:0> bits at memory location 2086h contain
the offset voltage information for the output voltage
difference amplifier. The value is an 8-bit two’s
complement number that represents the number of the
OVFCON counts needed to adjust for the differential
amplifier offset. This value can be used to completely
remove the differential amplifier offset.
For example, the offset of the differential amplifier is
measured to be +4.2 mV. Since one OVFCON count
equals 0.7 mV, this represents six counts of the
OVFCON register. Therefore the value stored at
location 2086h would be 0x06h, where clearing the
DIFF7 bit represents a positive number.
REGISTER 9-6:
CALWD6: CALIBRATION WORD 6 REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
bit 13
bit 8
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
DIFF7
DIFF6
DIFF5
DIFF4
DIFF3
DIFF2
DIFF1
DIFF0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 13-8
Unimplemented: Read as ‘0’
bit 7-0
DIFF<7:0>: OVFCON counts to adjust for differential amplifier offset calibration bits
DS22331A-page 62
 2013 Microchip Technology Inc.
MCP19111
9.7
Calibration Word 7
The BUFF<7:0> bits at memory location 2087h
represent the offset voltage of the unity gain buffer. This
is an 8-bit two’s complement number. The MSB is the
sign bit. If the MSB is set to 1, the resulting number is
negative.
REGISTER 9-7:
CALWD7: CALIBRATION WORD 7 REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
bit 13
bit 8
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
BUFF7
BUFF6
BUFF5
BUFF4
BUFF3
BUFF2
BUFF1
BUFF0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 13-8
Unimplemented: Read as ‘0’
bit 7-0
BUFF<7:0>: Unity gain buffer offset voltage calibration bits
 2013 Microchip Technology Inc.
x = Bit is unknown
DS22331A-page 63
MCP19111
NOTES:
DS22331A-page 64
 2013 Microchip Technology Inc.
MCP19111
10.0
RELATIVE EFFICIENCY
MEASUREMENT
7.
With a constant input voltage, output voltage and load
current, any change in the high-side MOSFET on-time
represents a change in the system efficiency. The
MCP19111 is capable of measuring the on-time of the
high-side MOSFET. Therefore, the relative efficiency of
the system can be measured and optimized by
changing the system parameters, such as switching
frequency, driver dead time or high-side drive strength.
10.1
Relative Efficiency Measurement
Procedure
To measure the relative efficiency, the RELEFF register, ABECON<MEASEN> and ABECON<RECIREN>
bits, and the ADC RELEFF input are used. The
following steps outlines the measurement process:
1.
2.
3.
4.
5.
6.
Set the ABECON<RECIREN> bit to enable the
measurement circuitry.
Clear the ABECON<MEASEN> bit.
With the ADC, read the RELEFF channel and
store this reading as the High.
With the ADC, read the VZC channel and store
this reading as the Low.
Set the ABECON<MEASEN> bit to initiate a
measurement cycle.
Monitor the RELEFF<MSDONE> bit. When set,
it indicates the measurement is complete.
When the measurement is complete, use the ADC
to read the RELEFF channel. This value becomes
the Fractional variable in Equation 10 1. This
reading should be accomplished approximately
50ms after the RELESS<MSDONE> bit is set.
8. Read the value of the RE<6:0> bits in the
RELEFF register and store the reading as
Whole.
9. Clear the ABECON<MEASEN> bit.
10. The relative efficiency is then calculated by the
following equation:
EQUATION 10-1:
Fractional – Low 
 Whole + ------------------------------------------------
 High – Low  
Duty_Cycle = ------------------------------------------------------------------------------- PR2 + 1 
Where:
Whole = Value obtained in Step 8 of the
measurement procedure
Fractional = Value obtained in Step 7 of the
measurement procedure
High = Value obtained in Step 3 of the
measurement procedure
Low = Value obtained in Step 4 of the
measurement procedure
Note 1: The RELEFF<MSDONE> bit is set and
cleared automatically.
REGISTER 10-1:
RELEFF: RELATIVE EFFICIENCY MEASUREMENT REGISTER
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
MSDONE
RE6
RE5
RE4
RE3
RE2
RE1
RE0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
MSDONE: Relative efficiency measurement done bit
1 = Relative efficiency measurement is complete
0 = Relative efficiency measurement is not complete
bit 6-0
RE<6:0>: Whole clock counts for relative efficiency measurement result
 2013 Microchip Technology Inc.
x = Bit is unknown
DS22331A-page 65
MCP19111
NOTES:
DS22331A-page 66
 2013 Microchip Technology Inc.
MCP19111
11.0
MEMORY ORGANIZATION
FIGURE 11-1:
PROGRAM MEMORY MAP
AND STACK FOR
MCP19111
There are two types of memory in the MCP19111:
• Program Memory
• Data Memory
- Special Function Registers (SFRs)
- General Purpose RAM
11.1
Program Memory Organization
The MCP19111 has a 13-bit program counter capable
of addressing an 8K x 14 program memory space. Only
the first 4K x 14 (0000h-0FFFh) is physically
implemented. Addressing a location above this
boundary will cause a wrap-around within the first
4K x 14 space. The Reset vector is at 0000h and the
interrupt vector is at 0004h (see Figure 11-1). The width
of the program memory bus (instruction word) is
14-bits. Since all instructions are a single word, the
MCP19111 has space for 4K of instructions.
PC<12:0>
CALL, RETURN
RETFIE, RETLW
13
Stack Level 1
Stack Level 8
Reset Vector
0000h
Interrupt Vector
0004h
0005h
On-Chip Program
Memory
0FFFh
1000h
Shadows 000-FFFh
1FFFh
User IDs(1)
2000h
2003h
ICD Instruction(1)
2004h
Manufacturing Codes(1)
2005h
Device ID (hardcoded)(1)
2006h
Config Word(1)
2007h
Reserved
2008h
200Ah
200Bh
Reserved for
Manufacturing & Test(1)
Calibration Words(1)
207Fh
2080h
208Fh
2090h
Unimplemented
20FFh
2100h
Shadows 2000-20FFh
3FFFh
Note 1: Not code protected.
 2013 Microchip Technology Inc.
DS22331A-page 67
MCP19111
11.1.1
READING PROGRAM MEMORY AS
DATA
There are two methods of accessing constants in program memory. The first method is to use tables of
RETLW instructions. The second method is to set a
Files Select Register (FSR) to point to the program
memory.
11.1.1.1
RETLW Instruction
The RETLW instruction can be used to provide access
to tables of constants. The recommended way to create
such a table is shown in Example 11-1.
EXAMPLE 11-1:
constants
RETLW
RETLW
RETLW
RETLW
DATA0
DATA1
DATA2
DATA3
ACCESSING PROGRAM
MEMORY VIA FSR
constants
RETLW DATA0
;Index0 data
RETLW DATA1
;Index1 data
RETLW DATA2
RETLW DATA3
my_function
;… LOTS OF CODE…
MOVLW
LOW constants
MOVWF
FSR1L
MOVLW
HIGH constants
MOVWF
FSR1H
MOVIW 0[FSR1]
;THE PROGRAM MEMORY IS IN W
RETLW INSTRUCTION
;Index0 data
;Index1 data
my_function
;… LOTS OF CODE…
MOVLW
DATA_INDEX
call constants
;… THE CONSTANT IS IN W
11.1.1.2
EXAMPLE 11-2:
Indirect Read with Files Select
Register (FSR)
The program memory can be accessed as data by
setting bit 7 of the FSRxH register and reading the
matching INDFx register. The MOVIW instruction will
place the lower 8 bits of the addressed word in the
W register. Writes to the program memory cannot be
performed via the INDF registers. Instructions that
access the program memory via the FSR require one
extra instruction cycle to complete. Example 11-2
demonstrates accessing the program memory via an
FSR.
The HIGH directive will set bit<7> if a label points to a
location in program memory.
11.2
Data Memory Organization
The data memory (see Figure 11-1) is partitioned into
four banks, which contain the General Purpose
Registers (GPR) and the Special Function Registers
(SFR). The Special Function Registers are located in
the first 32 locations of each bank. Register locations
20h-7Fh in Bank 0, A0h-EFh in Bank 1 and 120h-16Fh
in Bank 2 are General Purpose Registers,
implemented as static RAM. All other RAM is
unimplemented and returns ‘0’ when read. The
RP<1:0> bits of the STATUS register are the bank
select bits.
RP1
RP0
0
0
-> Bank 0 is selected
0
1
-> Bank 1 is selected
1
0
-> Bank 2 is selected
1
1
-> Bank 3 is selected
To move values from one register to another register,
the value must pass throught the W register. This
means that for all register-to-register moves, two
instruction cycles are required.
The STATUS
contains:
register,
shown
in
Register 11-1,
• the arithmetic status of the ALU
• the Reset status
• the bank select bits for data memory (RAM)
The STATUS register can be the destination for any
instruction, like any other register. If the STATUS
register is the destination for an instruction that affects
the Z, DC or C bits, then the write to these three bits is
disabled. These bits are set or cleared according to the
device logic. Furthermore, the TO and PD bits are not
writable. Therefore, the result of an instruction with the
STATUS register as destination may be different than
intended.
DS22331A-page 68
 2013 Microchip Technology Inc.
MCP19111
For example, CLRF STATUS will clear the upper three
bits and set the Z bit. This leaves the STATUS register
as ‘000u u1uu’ (where u = unchanged).
Note 1: The C and DC bits operate as Borrow
and Digit Borrow out bits, respectively, in
subtraction.
Therefore, it is recommended that only BCF, BSF,
SWAPF and MOVWF instructions are used to alter the
STATUS register, because these instructions do not
affect any Status bits. For other instructions not
affecting any Status bits, see the Section 29.0
“Instruction Set Summary”.
REGISTER 11-1:
R/W-0
STATUS: STATUS REGISTER
R/W-0
IRP
RP1
R/W-0
RP0
R-1
TO
R-1
PD
R/W-x
Z
R/W-x
R/W-x
(1)
C(1)
DC
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
IRP: Register Bank Select bit (used for Indirect addressing)
1 = Reserved
0 = Bank 0, 1, 2, 3 (00h - FFh)
bit 6-5
RP<1:0>: Register Bank Select bits (used for Direct addressing)
00 = Bank 0 (00h - 7Fh)
01 = Bank 1 (80h - FFh)
10 = Bank 2 (100h - 17Fh)
11 = Bank 3 (180h - 1FFh)
bit 4
TO: Time-out bit
1 = After power-up, CLRWDT instruction or SLEEP instruction
0 = A WDT time-out occurred
bit 3
PD: Power-down bit
1 = After power-up or by the CLRWDT instruction
0 = By execution of the SLEEP instruction
bit 2
Z: Zero bit
1 = The result of an arithmetic or logic operation is zero
0 = The result of an arithmetic or logic operation is not zero
bit 1
DC: Digit Carry/Digit Borrow bit(1) (ADDWF, ADDLW, SUBLW, SUBWF instructions)
1 = A carry-out from the 4th low-order bit of the result occurred
0 = No carry-out from the 4th low-order bit of the result
bit 0
C: Carry/Borrow bit(1) (ADDWF, ADDLW, SUBLW, SUBWF instructions)(1)
1 = A carry-out from the Most Significant bit of the result occurred
0 = No carry-out from the Most Significant bit of the result occurred
Note 1:
11.2.1
For Borrow, the polarity is reversed. A subtraction is executed by adding the two’s complement of the
second operand. For rotate (RRF, RLF) instructions, this bit is loaded with either the high-order or low-order
bit of the source register.
SPECIAL FUNCTION REGISTERS
The Special Function Registers are registers used by
the CPU and peripheral functions for controlling the
desired operation of the device (see Table 11-1). These
registers are static RAM.
 2013 Microchip Technology Inc.
The special registers can be classified into two sets:
core and peripheral. The Special Function Registers
associated with the microcontroller core are described
in this section. Those related to the operation of the
peripheral features are described in the section of that
peripheral feature.
DS22331A-page 69
MCP19111
11.3
DATA MEMORY
TABLE 11-1:
MCP19111 DATA MEMORY MAP
File
Address
File
Address
File
Address
File
Address
Indirect addr.(1)
00h
Indirect addr. (1)
80h
Indirect addr.(1)
100h
Indirect addr. (1)
TMR0
01h
OPTION_REG
81h
TMR0
101h
OPTION_REG
181h
PCL
02h
PCL
82h
PCL
102h
PCL
182h
STATUS
03h
STATUS
83h
STATUS
103h
STATUS
183h
184h
180h
FSR
04h
FSR
84h
FSR
104h
FSR
PORTGPA
05h
TRISGPA
85h
WPUGPA
105h
IOCA
185h
PORTGPB
06h
TRISGPB
86h
WPUGPB
106h
IOCB
186h
PIR1
07h
PIE1
87h
PE1
107h
ANSELA
187h
ANSELB
PIR2
08h
PIE2
88h
BUFFCON
108h
PCON
09h
APFCON
89h
ABECON
109h
188h
PCLATH
0Ah
PCLATH
8Ah
PCLATH
10Ah
PCLATH
18Ah
INTCON
0Bh
INTCON
8Bh
INTCON
10Bh
INTCON
18Bh
TMR1L
0Ch
8Ch
10Ch
PORTICD(2)
18Ch
TMR1H
0Dh
8Dh
10Dh
TRISICD(2)
18Dh
T1CON
0Eh
8Eh
10Eh
ICKBUG(2)
18Eh
TMR2
0Fh
8Fh
10Fh
BIGBUG(2)
18Fh
190h
189h
T2CON
10h
VINLVL
90h
SSPADD
110h
PMCON1
PR2
11h
OCCON
91h
SSPBUF
111h
PMCON2
191h
92h
SSPCON1
112h
PMADRL
192h
CSGSCON
93h
SSPCON2
113h
PMADRH
193h
94h
SSPCON3
114h
PMDATL
194h
CSDGCON
95h
SSPMSK
115h
PMDATH
96h
SSPSTAT
116h
196h
117h
197h
12h
PWMPHL
13h
PWMPHH
14h
PWMRL
15h
PWMRH
16h
17h
VZCCON
97h
SSPADD2
SSPMSK2
195h
18h
CMPZCON
98h
118h
OSCCAL
198h
OVCCON
19h
OUVCON
99h
119h
DOVCAL
199h
OVFCON
1Ah
OOVCON
9Ah
11Ah
TTACAL
19Ah
OSCTUNE
1Bh
DEADCON
9Bh
11Bh
BGRCAL
19Bh
ADRESL
1Ch
SLPCRCON
9Ch
11Ch
VROCAL
19Ch
ADRESH
1Dh
SLVGNCON
9Dh
11Dh
ZROCAL
19Dh
ADCON0
1Eh
RELEFF
9Eh
11Eh
ADCON1
1Fh
9Fh
11Fh
ATSTCON
19Fh
20h
General
Purpose
Register
General
Purpose
Register
80 Bytes
EFh
Accesses
Bank 0
7Fh
Note 1:
2:
General
Purpose
Register
120h
1A0h
80 bytes
96 Bytes
Bank 0
A0h
19Eh
F0h
16F
Accesses
Bank 0
FFh
Bank 1
170h
1EF
Accesses
Bank 0
17Fh
Bank2
1F0h
1FFh
Bank3
Unimplemented data memory locations, read as '0'.
Not a physical register.
Only accessible when DBGEN = 0 and ICKBUG<INBUG> = 1.
DS22331A-page 70
 2013 Microchip Technology Inc.
MCP19111
TABLE 11-2:
Adr
Name
MCP19111 SPECIAL REGISTERS SUMMARY BANK 0
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR Reset
Value on
all other
resets(1)
Bank 0
00h
INDF
Addressing this location uses contents of FSR to address data memory (not a physical register)
xxxx xxxx xxxx xxxx
01h
TMR0
Timer0 Module’s Register
xxxx xxxx uuuu uuuu
02h
PCL
03h
STATUS
04h
FSR
05h
PORTGPA
GPA7
GPA6
06h
PORTGPB
GPB7
GPB6
07h
PIR1
—
ADIF
08h
PIR2
UVIF
—
09h
PCON
—
0Ah
PCLATH
—
0Bh
INTCON
GIE
Program Counter's (PC) Least Significant byte
IRP
RP1
RP0
TO
PD
Z
0000 0000 0000 0000
DC
C
0001 1xxx 000q quuu
GPA1
GPA0
xxxx xxxx uuuu uuuu
Indirect data memory address pointer
GPA5
xxxx xxxx uuuu uuuu
GPA4
GPA3
GPA2
GPB5
GPB4
—
GPB2
GPB1
GPB0
xxx- xxxx uuu- uuuu
BCLIF
SSPIF
—
—
TMR2IF
TMR1IF
-000 --00 -000 --00
OCIF
OVIF
—
—
VINIF
DCERIF
0-00 --00 0-00 --00
—
—
—
—
---- -qq- ---- -uu-
—
—
PEIE
T0IE
—
OT
POR
Write buffer for upper 5 bits of program counter
INTE
IOCE
T0IF
INTF
---0 0000 ---0 0000
IOCF(3)
0000 000x 0000 000u
0Ch TMR1L
Holding register for the Least Significant byte of the 16-bit TMR1
xxxx xxxx uuuu uuuu
0Dh TMR1H
Holding register for the Most Significant byte of the 16-bit TMR1
xxxx xxxx uuuu uuuu
0Eh
T1CON
0Fh
TMR2
10h
T2CON
11h
PR2
12h
—
—
T1CKPS1
—
—
—
T1CKPS0
—
—
TMR1CS
TMR1ON
TMR2ON
T2CKPS1
T2CKPS0
Timer2 Module Register
—
—
0000 0000 uuuu uuuu
Timer2 Module Period Register
—
--00 --00 --uu --uu
---- -000 ---- -000
1111 1111 1111 1111
Unimplemented
—
—
13h
PWMPHL
SLAVE Phase Shift Register
xxxx xxxx uuuu uuuu
14h
PWMPHH
SLAVE Phase Shift Register
xxxx xxxx uuuu uuuu
15h
PWMRL
PWM Register Low Byte
xxxx xxxx uuuu uuuu
16h
PWMRH
PWM Register High Byte
xxxx xxxx uuuu uuuu
17h
—
Unimplemented
18h
—
Unimplemented
19h
OVCCON
OVC7
OVC6
OVC5
OVC4
1Ah
OVFCON
VOUTON
—
—
OVF4
1Bh
OSCTUNE
—
—
—
TUN4
OVC3
—
—
—
—
OVC2
OVC1
OVC0
0000 0000 0000 0000
OVF3
OVF2
OVF1
OVF0
0--0 0000 0--0 0000
TUN3
TUN2
TUN1
TUN0
---0 0000 ---0 0000
1Ch ADRESL
Least significant 8 bits of the right-shifted result
xxxx xxxx uuuu uuuu
1Dh ADRESH
Most significant 2 bits of right-shifted result
---- --xx uuuu uuuu
1Eh
ADCON0
—
CHS4
CHS3
CHS2
CHS1
CHS0
GO/DONE
ADON
-000 0000 -000 0000
1Fh
ADCON1
—
ADCS2
ADCS1
ADCS0
—
—
—
—
-000 ---- -000 ----
Legend:
Note 1:
2:
3:
— = Unimplemented locations read as ‘0’, u = unchanged, x = unknown, q = value depends on condition shaded = unimplemented
Other (non power-up) resets include MCLR Reset and Watchdog Timer Reset during normal operation.
IRP & RP1 bits are reserved, always maintain these bits clear.
MCLR and WDT reset does not affect the previous value data latch. The IOCF bit will be cleared upon reset but will set again if the
mismatch exists.
 2013 Microchip Technology Inc.
DS22331A-page 71
MCP19111
TABLE 11-3:
Addr
MCP19111 SPECIAL REGISTERS SUMMARY BANK 1
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR Reset
Values on
all other
resets(1)
Bank 1
80h
INDF
81h
OPTION_REG
Addressing this location uses contents of FSR to address data memory (not a physical register)
82h
PCL
83h
STATUS
84h
FSR
85h
TRISGPA
TRISA7
TRISA6
TRISA5
TRISA4
TRISA3
86h
TRISGPB
TRISB7
TRISB6
TRISB5
TRISB4
87h
PIE1
—
ADIE
BCLIE
88h
PIE2
UVIE
—
89h
APFCON
—
—
8Ah
PCLATH
—
—
—
8Bh
INTCON
GIE
PEIE
T0IE
8Ch
—
Unimplemented
—
—
8Dh
—
Unimplemented
—
—
8Eh
—
Unimplemented
—
—
8Fh
—
Unimplemented
—
—
RAPU
INTEDG
T0CS
T0SE
PSA
PS2
PS1
PS0
DC
C
TRISA2
TRISA1
TRISA0
1111 1111 1111 1111
—
TRISB2
TRISB1
TRISB0
1111 1111 1111 1111
SSPIE
—
—
TMR2IE
TMR1IE
-000 --00 -000 --00
OCIE
OVIE
—
—
VINIE
DCERIE
0-00 --00 0-00 --00
—
—
—
—
—
CLKSEL
---- ---0 ---- ---0
Program Counter's (PC) Least Significant byte
IRP(2)
RP1(2)
xxxx xxxx uuuu uuuu
1111 1111 1111 1111
RP0
TO
PD
Z
0000 0000 0000 0000
Indirect data memory address pointer
xxxx xxxx uuuu uuuu
Write buffer for upper 5 bits of program counter
INTE
IOCE
T0IF
0001 1xxx 000q quuu
INTF
IOCF(4)
---0 0000 ---0 0000
0000 000x 0000 000u
90h
VINLVL
UVLOEN
—
UVLO5
UVLO4
UVLO3
UVLO2
UVLO1
UVLO0
0-xx xxxx 0-uu uuuu
91h
OCCON
OCEN
OCLEB1
OCLEB0
OOC4
OOC3
OOC2
OOC1
OOC0
0xxx xxxx 0uuu uuuu
92h
—
—
—
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
--xx xxxx --uu uuuu
—
Reserved
Reserved
Reserved
CSGS3
CSGS2
CSGS1
CSGS0
-xxx xxxx -uuu uuuu
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
xxxx xxxx uuuu uuuu
CSDGEN
—
—
—
Reserved
CSDG2
CSDG1
CSDG0
0--- xxxx 0--- uuuu
—
—
—
—
Reserved
Reserved
Reserved
Reserved
---- xxxx ---- uuuu
VZC7
VZC6
VZC5
VZC4
VZC3
VZC2
VZC1
VZC0
xxxx xxxx uuuu uuuu
CMPZF3
CMPZF2
CMPZF1
CMPZF0
CMPZG3
CMPZG2
CMPZG1
CMPZG0
xxxx xxxx uuuu uuuu
93h
CSGSCON
94h
95h
—
CSDGCON
96h
—
97h
VZCCON
98h
CMPZCON
99h
OUVCON
OUV7
OUV6
OUV5
OUV4
OUV3
OUV2
OUV1
OUV0
xxxx xxxx uuuu uuuu
9Ah
OOVCON
OOV7
OOV6
OOV5
OOV4
OOV3
OOV2
OOV1
OOV0
xxxx xxxx uuuu uuuu
9Bh
DEADCON
HDLY3
HDLY2
HDLY1
HDLY0
LDLY3
LDLY2
LDLY1
LDLY0
xxxx xxxx uuuu uuuu
9Ch
SLPCRCON
SLPG3
SLPG2
SLPG1
SLPG0
SLPS3
SLPS2
SLPS1
SLPS0
xxxx xxxx uuuu uuuu
9Dh
SLVGNCON
—
—
—
SLVGN4
SLVGN3
SLVGN2
SLVGN1
SLVGN0
---x xxxx ---u uuuu
9Eh
RELEFF
MSDONE
RE6
RE5
RE4
RE3
RE2
RE1
RE0
0000 0000 0000 0000
9Fh
—
Legend:
Note 1:
2:
3:
4:
— = Unimplemented locations read as ‘0’, u = unchanged, x = unknown, q = value depends on condition, shaded = unimplemented
Other (non power-up) resets include MCLR Reset and Watchdog Timer Reset during normal operation.
IRP & RP1 bits are reserved, always maintain these bits clear.
RA3 pull-up is enabled when pin is configured as MCLR in Configuration Word.
MCLR and WDT Reset does not affect the previous value data latch. The IOCF bit will be cleared upon reset but will set again if the
mismatch exists.
DS22331A-page 72
Unimplemented
—
—
 2013 Microchip Technology Inc.
MCP19111
TABLE 11-4:
Adr
Name
MCP19111 SPECIAL REGISTERS SUMMARY BANK 2
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR Reset
Value on
all other
resets(1)
Bank 2
100h
INDF
Addressing this location uses contents of FSR to address data memory (not a physical register)
xxxx xxxx xxxx xxxx
101h
TMR0
Timer0 Module’s Register
xxxx xxxx uuuu uuuu
102h
PCL
Program Counter's (PC) Least Significant byte
0000 0000 0000 0000
103h
STATUS
IRP(2)
RP1
(2)
RP0
TO
PD
Z
DC
C
0001 1xxx 000q quuu
104h
FSR
105h
WPUGPA
—
—
WPUA5
Indirect data memory address pointer
—
WPUA3
WPUA2
WPUA1
WPUA0
--1- 1111 --u- uuuu
106h
WPUGPB
WPUB7
WPUB6
WPUB5
WPUB4
—
WPUB2
WPUB1
—
1111 -11- uuuu -uu-
107h
PE1
DECON
DVRSTR
HDLYBY
LDLYBY
PDEN
PUEN
UVTEE
OVTEE
0000 1100 0000 1100
108h
BUFFCON
MLTPH2
MLTPH1
MLTPH0
ASEL4
ASEL3
ASEL2
ASEL1
ASEL0
0000 0000 0000 0000
109h
ABECON
OVDCEN
UVDCEN
MEASEN
SLCPBY
CRTMEN
TMPSEN
RECIREN
PATHEN
10Ah PCLATH
—
—
—
10Bh INTCON
GIE
PEIE
T0IE
xxxx xxxx uuuu uuuu
Write buffer for upper 5 bits of program counter
INTE
IOCE
T0IF
INTF
0000 0000 0000 0000
---0 0000 ---0 0000
IOCF(3)
0000 000x 0000 000u
10Ch
—
Unimplemented
—
—
10Dh
—
Unimplemented
—
—
10Eh
—
Unimplemented
—
—
—
Unimplemented
—
—
10Fh
110h
SSPADD
ADD<7:0>
0000 0000 0000 0000
111h
SSPBUF
112h
SSPCON1
Synchronous Serial Port Receive Buffer/Transmit Register
WCOL
SSPOV
SSPEN
CKP
113h
SSPCON2
GCEN
ACKSTAT
ACKDT
ACKEN
RCEN
PEN
RSEN
SEN
0000 0000 0000 0000
114h
SSPCON3
ACKTIM
PCIE
SCIE
BOEN
SDAHT
SBCDE
AHEN
DHEN
0000 0000 0000 0000
115h
SSPMSK
116h
SSPSTAT
R/W
UA
BF
117h
SSPADD2
118h
119h
xxxx xxxx uuuu uuuu
SSPM>3:0>
0000 0000 0000 0000
MSK<7:0>
SMP
CKE
D/A
P
S
1111 1111 1111 1111
—
—
ADD2<7:0>
0000 0000 0000 0000
SSPMSK2
MSK2<7:0>
1111 1111 1111 1111
—
Unimplemented
—
—
11Ah
—
Unimplemented
—
—
11Bh
—
Unimplemented
—
—
11Ch
—
Unimplemented
—
—
11Dh
—
Unimplemented
—
—
11Eh
—
Unimplemented
—
—
11Fh
—
Unimplemented
—
—
Legend:
Note 1:
2:
3:
— = Unimplemented locations read as ‘0’, u = unchanged, x = unknown, q = value depends on condition shaded = unimplemented
Other (non power-up) resets include MCLR Reset and Watchdog Timer Reset during normal operation.
IRP & RP1 bits are reserved, always maintain these bits clear.
MCLR and WDT reset does not affect the previous value data latch. The IOCF bit will be cleared upon reset but will set again if the
mismatch exists.
 2013 Microchip Technology Inc.
DS22331A-page 73
MCP19111
TABLE 11-5:
Addr
MCP19111 SPECIAL REGISTERS SUMMARY BANK 3
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR Reset
Values on
all other
resets(1)
Bank 3
180h
INDF
Addressing this location uses contents of FSR to address data memory (not a physical register)
xxxx xxxx uuuu uuuu
181h
OPTION_REG
RAPU
INTEDG
1111 1111 1111 1111
IRP(2)
RP1(2)
T0CS
T0SE
PSA
PS2
PS1
PS0
DC
C
182h
PCL
183h
STATUS
Program Counter's (PC) Least Significant byte
184h
FSR
185h
IOCA
IOCA7
IOCA6
IOCA5
IOCA4
IOCA3
IOCA2
IOCA1
IOCA0
0000 0000 0000 0000
186h
IOCB
IOCB7
IOCB6
IOCB5
IOCB4
—
IOCB2
IOCB1
IOCB0
0000 -000 0000 -000
187h
ANSELA
—
—
—
—
ANSA3
ANSA2
ANSA1
ANSA0
---- 1111 ---- 1111
188h
ANSELB
—
—
ANSB5
ANSB4
—
ANSB2
ANSB1
—
--11 -11- --11 -11-
189h
—
TO
PD
Z
0000 0000 0000 0000
Indirect data memory address pointer
18Ah PCLATH
18Bh INTCON
(5)
18Ch PORTICD
(5)
18Dh TRISICD
(5)
18Eh ICKBUG
(5)
18Fh BIGBUG
190h
RP0
PMCON1
xxxx xxxx uuuu uuuu
Unimplemented
—
—
—
GIE
PEIE
T0IE
—
Write buffer for upper 5 bits of program counter
INTE
0001 1xxx 000q quuu
IOCE
T0IF
INTF
IOCF(4)
—
---0 0000 ---0 0000
0000 000x 0000 000u
In-Circuit Debug Port Register
In-Circuit Debug TRIS Register
In-Circuit Debug Register
0--- ---- 0--- ----
In-Circuit Debug Breakpoint Register
—
CALSEL
—
—
—
WREN
---- ---- ---- ---WR
RD
Program Memory Control Register 2 (not a physical register)
-0-- -000 -0-- -000
191h
PMCON2
192h
PMADRL
PMADRL7
PMADRL6
PMADRL5
PMADRL4
PMADRL3
PMADRL2
PMADRL1
PMADRL0
0000 0000 0000 0000
193h
PMADRH
—
—
—
—
—
PMADRH2
PMADRH1
PMADRH0
---- -000 ---- -000
194h
PMDATL
PMDATL7
PMDATL6
PMDATL5
PMDATL4
PMDATL3
PMDATL2
PMDATL1
PMDATL0
0000 0000 0000 0000
195h
PMDATH
—
—
PMDATH5
PMDATH4
PMDATH3
PMDATH2
PMDATH1
PMDATH0
--00 0000 --00 0000
---- ---- ---- ----
196h
—
Unimplemented
—
—
197h
—
Unimplemented
—
—
198h
OSCCAL
—
FCALT6
FCALT5
FCALT4
FCALT3
FCALT2
FCALT1
FCALT0
xxxx xxxx uuuu uuuu
199h
DOVCAL
—
—
—
—
DOVT3
DOVT2
DOVT1
DOVT0
xxxx xxxx uuuu uuuu
19Ah TTACAL
—
—
—
—
TTA3
TTA2
TTA1
TTA0
xxxx xxxx uuuu uuuu
19Bh BGRCAL
Reserve
d
Reserved
Reserved
Reserved
BGRT3
BGRT2
BGRT1
BGRT0
xxxx xxxx uuuu uuuu
19Ch VROCAL
—
—
—
—
VROT3
VROT2
VROT1
VROT0
xxxx xxxx uuuu uuuu
19Dh ZROCAL
—
—
—
—
ZROT3
ZROT2
ZROT1
ZROT0
xxxx xxxx uuuu uuuu
LODIS
BNCHEN
DRVDIS
1--0 0001 1--0 0001
19Eh
19Fh
—
ATSTCON
Legend:
Note 1:
2:
3:
4:
5:
Unimplemented
—
—
—
—
HIDIS
—
—
— = Unimplemented locations read as ‘0’, u = unchanged, x = unknown, q = value depends on condition, shaded = unimplemented
Other (non power-up) resets include MCLR Reset and Watchdog Timer Reset during normal operation.
IRP & RP1 bits are reserved, always maintain these bits clear.
RA3 pull-up is enabled when pin is configured as MCLR in Configuration Word.
MCLR and WDT Reset does not affect the previous value data latch. The IOCF bit will be cleared upon reset but will set again if the
mismatch exists.
Only accessible when DBGEN = 0 and ICKBUG<INBUG> = 1.
DS22331A-page 74
 2013 Microchip Technology Inc.
MCP19111
11.3.0.1
OPTION Register
Note 1: To achieve a 1:1 prescaler assignment
for Timer0, assign the prescaler to the
WDT by setting PSA bit to ‘1’ of the
OPTION register. See Section 23.1.3
“Software Programmable Prescaler”
The OPTION register is a readable and writable
register, which contains various control bits to
configure:
•
•
•
•
Timer0/WDT prescaler
External GPA2/INT interrupt
Timer0
Weak pull-ups on PORTGPA and PORTGPB
REGISTER 11-2:
OPTION_REG: OPTION REGISTER (Note 1)
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
RAPU
INTEDG
T0CS
T0SE
PSA
PS2
PS1
PS0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
RAPU: Port GPx Pull-up Enable bit
1 = Port GPx pull-ups are disabled
0 = Port GPx pull-ups are enabled
bit 6
INTEDG: Interrupt Edge Select bit
0 = Interrupt on rising edge of INT pin
1 = Interrupt on falling edge of INT pin
bit 5
T0CE: TMR0 Clock Source Select bit
1 = Transition on T0CKI pin
0 = Internal instruction cycle clock
bit 4
T0SE: TMR0 Source Edge Select bit
1 = Increment on high-to-low transition on T0CKI pin
0 = Increment on low-to-high transition on T0CKI pin
bit 3
PSA: Prescaler Assignment bit
1 = Prescaler is assigned to WDT
0 = Prescaler is assigned to the Timer0 module
bit 2-0
PS<2:0>: Prescaler Rate Select bits
Note 1:
Bit Value
TMR0
Rate
WDT Rate
000
001
010
011
100
101
110
111
1: 2
1: 4
1: 8
1: 16
1: 32
1: 64
1: 128
1: 256
1: 1
1: 2
1: 4
1: 8
1: 16
1: 32
1: 64
1: 128
x = Bit is unknown
Individual WPUx bit must also be enabled.
 2013 Microchip Technology Inc.
DS22331A-page 75
MCP19111
11.4
11.4.3
PCL and PCLATH
The Program Counter (PC) is 13 bits wide. The low byte
comes from the PCL register, which is a readable and
writable register. The high byte (PC<12:8>) is not directly
readable or writable and comes from PCLATH. On any
Reset, the PC is cleared. Figure 11-2 shows the two
situations for loading the PC. The upper example in
Figure 11-2 shows how the PC is loaded on a write to PCL
(PCLATH<4:0>  PCH). The lower example in
Figure 11-2 shows how the PC is loaded during a CALL or
GOTO instruction (PCLATH<4:3>  PCH).
A computed function CALL allows programs to maintain
tables of functions and provide another way to execute
state machines or look-up tables. When performing a
table read using a computed function CALL, care
should be exercised if the table location crosses a PCL
memory boundary (each 256-byte block).
If using the CALL instruction, the PCH<2:0> and PCL
registers are loaded with the operand of the CALL
instruction. PCH<6:3> is loaded with PCLATH<6:3>.
11.4.4
FIGURE 11-2:
LOADING OF PC IN
DIFFERENT SITUATIONS
PCH
12
PCL
8 7
0
Instruction with
Destination
PC
5
8
PCLATH<4:0>
ALU Result
PCLATH
PCH
12 11 10 8 7
PCL
0
PC
GOTO, CALL
2
PCLATH<4:3>
11
Opcode <10:0>
The stack operates as a circular buffer. This means that
after the stack has been PUSHed eight times, the ninth
push overwrites the value that was stored from the first
push. The tenth push overwrites the second push (and
so on).
Note 1: There are no Status bits to indicate Stack
Overflow or Stack Underflow conditions.
2: There are no instructions/mnemonics
called PUSH or POP. These are actions
that occur from the execution of the
CALL, RETURN, RETLW and RETFIE
instructions or the vectoring to an
interrupt address.
MODIFYING PCL
Executing any instruction with the PCL register as the
destination simultaneously causes the Program
Counter PC<12:8> bits (PCH) to be replaced by the
contents of the PCLATH register. This allows the entire
content of the program counter to be changed by
writing the desired upper 5 bits to the PCLATH register.
When the lower 8 bits are written to the PCL register, all
13 bits of the program counter will change to the values
contained in the PCLATH register and those being
written to the PCL register.
11.4.2
COMPUTED GOTO
A computed GOTO is accomplished by adding an offset
to the program counter (ADDWF PCL). Care should be
exercised when jumping into a look-up table or
program branch table (computed GOTO) by modifying
the PCL register. Assuming that PCLATH is set to the
table start address, if the table length is greater than
255 instructions or if the lower 8 bits of the memory
address rolls over from 0xFFh to 0X00h in the middle
of the table, then PCLATH must be incremented for
each address rollover that occurs between the table
beginning and the table location within the table.
STACK
The MCP19111 has an 8-level x 1-bit wide hardware
stack (refer to Figure 11-1). The stack space is not part
of either program or data space and the Stack Pointer
is not readable or writable. The PC is PUSHed onto the
stack when CALL instruction is executed or an interrupt
causes a branch. The stack is POPed in the event of a
RETURN, RETLW or a RETFIE instruction execution.
PCLATH is not affected by a PUSH or POP operation.
PCLATH
11.4.1
COMPUTED FUNCTION CALLS
11.5
Indirect Addressing, INDF and
FSR Registers
The INDF register is not a physical register. Addressing
the INDF register will cause indirect addressing.
Indirect addressing is possible by using the INDF
register. Any instruction using the INDF register
actually accesses data pointed to by the File Select
Register (FSR). Reading INDF itself indirectly will
produce 00h. Writing to the INDF register directly
results in a no operation (although Status bits may be
affected). An effective 9-bit address is obtained by
concatenating the 8-bit FSR and the IRP bit of the
STATUS register, as shown in Figure 11-3.
A simple program to clear RAM location 40h-7Fh using
indirect addressing is shown in Example 11-3.
For more information, refer to Application Note AN556
– “Implementing a Table Read” (DS00556).
DS22331A-page 76
 2013 Microchip Technology Inc.
MCP19111
EXAMPLE 11-3:
MOVLW
MOVWF
NEXT
CLRF
INCF
BTFSS
GOTO
CONTINUE
FIGURE 11-3:
INDIRECT ADDRESSING
0x40
FSR
INDF
FSR
FSR,7
NEXT
;initialize pointer
;to RAM
;clear INDF register
;inc pointer
;all done?
;no clear next
;yes continue
DIRECT/INDIRECT ADDRESSING
Direct Addressing
RP1 RP0 6
Bank Select
From Opcode
Indirect Addressing
0
IRP
7 File Select Register
Bank Select
Location Select
00
01
10
0
Location Select
11
00h
180h
Data
Memory
7Fh
1FFh
Bank 0
Bank 1
Bank 2
Bank 3
For memory map detail, see Figure 11-2.
 2013 Microchip Technology Inc.
DS22331A-page 77
MCP19111
NOTES:
DS22331A-page 78
 2013 Microchip Technology Inc.
MCP19111
12.0
DEVICE CONFIGURATION
Note:
Device Configuration consists of Configuration Word,
Code Protection and Device ID.
12.1
Configuration Word
There are several Configuration Word bits that allow
different timers to be enabled and memory protection
options. These are implemented as Configuration
Word at 2007h.
REGISTER 12-1:
The DBGEN bit in Configuration Word is
managed
automatically
by
device
development tools, including debuggers
and programmers. For normal device
operation, this bit should be maintained as
a '1'.
CONFIG – CONFIGURATION WORD REGISTER
R/P-1
U-1
R/P-1
R/P-1
U-1
U-1
DBGEN
—
WRT1
WRT0
—
—
bit 13
bit 8
U-1
R/P-1
R/P-1
R/P-1
R/P-1
U-1
U-1
U-1
—
CP
MCLRE
PWRTE
WDTE
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 13
DBGEN: ICD Debug bit
1 = ICD debug mode disabled
0 = ICD debug mode enabled
bit 12
Unimplemented: Read as ‘1’
bit 11-10
WRT<1:0>: Flash Program Memory Self Write Enable bit
11 = Write protection off
10 = 000h to 3FFh write protected, 400h to FFFh may be modified by PMCON1 control
01 = 000h to 7FFh write protected, 800h to FFFh may be modified by PMCON1 control
00 = 000h to FFFh write protected, entire program memory is write protected.
bit 9-7
Unimplemented: Read as ‘1’
bit 6
CP: Code Protection
1 = Program memory code protection is disabled
0 = Program memory code protection is enabled
bit 5
MCLRE: MCLR Pin Function Select
1 = MCLR pin is MCLR function and weak internal pull-up is enabled
0 = MCLR pin is alternate function, MCLR function is internally disabled
bit 4
PWRTE: Power-up Timer Enable bit(1)
1 = PWRT disabled
0 = PWRT enabled
bit 3
WDTE: Watchdog Timer Enable bit
1 = WDT enabled
0 = WDT disabled
bit 2-0
Note 1:
Unimplemented: Read as ‘1’
Bit is reserved and not controlled by user.
 2013 Microchip Technology Inc.
DS22331A-page 79
MCP19111
12.2
Code Protection
12.4
Code protection allows the device to be protected from
unauthorized access. Internal access to the program
memory is unaffected by any code protection setting.
12.2.1
Four memory locations (2000h – 2003h) are
designated as ID locations where the user can store
checksum or other code identification numbers. These
locations are not accessible during normal execution
but are readable and writable during Program/Verify
mode. Only the Least Significant 7 bits of the ID
locations are reported when using MPLAB Integrated
Development Environment (IDE).
PROGRAM MEMORY PROTECTION
The entire program memory space is protected from
external reads and writes by the CP bit in the
Configuration Word. When CP = 0, external reads and
writes of the program memory are inhibited and a read
will return all ‘0’s. The CPU can continue to read
program memory, regardless of the protection bit
settings. Writing the program memory is dependent
upon the write protection setting. See Section 12.3
“Write Protection” for more information.
12.3
ID Locations
12.5
Device ID and Revision ID
The memory location 2006h is where the Device ID and
Revision ID are stored. The upper nine bits hold the
Device ID. The lower five bits hold the Revision ID.
Development tools, such as device programmers and
debuggers, may be used to read the Device ID and
Revision ID.
Write Protection
Write protection allows the device to be protected from
unintended self-writes. Applications, such as
bootloader software, can be protected while allowing
other regions of the program memory to be modified.
The WRT<1:0> bits in the Configuration Word define
the size of the program memory block that is protected.
REGISTER 12-2:
DEVICEID: DEVICE ID REGISTER(1)
R
R
R
R
R
R
DEV<8:3>
bit 13
R
R
bit 8
R
R
R
DEV<2:0>
R
R
R
REV<4:0>
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 13-5
x = Bit is unknown
DEV<8:0>: Device ID bits
DEVICEID<13:0> Values
Device
MCP19111
bit 4-0
Note 1:
DEV<8:0>
REV<4:0>
10 1111 100
x xxxx
REV<4:0>: Revision ID bits
These bits are used to identify the revision.
This location cannot be written.
DS22331A-page 80
 2013 Microchip Technology Inc.
MCP19111
13.0
OSCILLATOR MODES
13.3
The MCP19111 has one oscillator configuration which
is an 8 MHz internal oscillator.
13.1
Internal Oscillator (INTOSC)
The Internal Oscillator module provides a system
clock source of 8 MHz. The frequency of the internal
oscillator can be trimmed with a calibration value in the
OSCTUNE register.
13.2
Frequency Tuning in User Mode
In addition to the factory calibration, the base
frequency can be tuned in the user's application. This
frequency tuning capability allows the user to deviate
from the factory calibrated frequency. The user can
tune the frequency by writing to the OSCTUNE
register (see Register 13-1).
Oscillator Calibration
The 8 MHz internal oscillator is factory calibrated. The
factory calibration values reside in the read-only
Calibration Word 1 register. These values must be read
from the Calibration Word 1 register and stored in the
OSCCAL register. Refer to Section 18.0 “Flash
Program Memory Control” for the procedure on
reading from program memory.
Note 1: The FCAL<6:0> bits from the Calibration
Word 1 register must be written into the
OSCCAL register to calibrate the internal
oscillator.
REGISTER 13-1:
OSCTUNE – OSCILLATOR TUNING REGISTER
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
TUN4
TUN3
TUN2
TUN1
TUN0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
TUN<4:0>: Frequency Tuning bits
01111 = Maximum frequency
01110 =
•
•
•
00001 =
00000 = Center frequency. Oscillator Module is running at the calibrated frequency.
11111 =
•
•
•
10000 = Minimum frequency
 2013 Microchip Technology Inc.
DS22331A-page 81
MCP19111
13.3.1
OSCILLATOR DELAY UPON
POWER-UP, WAKE-UP AND
BASE FREQUENCY CHANGE
On power up, the device is held in reset by the
power-up time, if the power-up timer is enabled.
In applications where the OSCTUNE register is used to
shift the frequency of the internal oscillator, the
application should not expect the frequency of the
internal oscillator to stabilize immediately. In this case,
the frequency may shift gradually toward the new
value. The time for this frequency shift is less than eight
cycles of the base frequency.
TABLE 13-1:
Following a wake-up from Sleep mode or POR, an
internal delay of ~10 µs is invoked to allow the
memory bias to stabilize before program execution
can begin.
SUMMARY OF REGISTERS ASSOCIATED WITH CLOCK SOURCES
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
OSCTUNE
—
—
—
TUN4
TUN3
TUN2
TUN1
TUN0
81
Legend: — = unimplemented locations read as ‘0’. Shaded cells are not used by clock sources.
TABLE 13-2:
SUMMARY OF CALIBRATION WORD ASSOCIATED WITH CLOCK SOURCES
Name
Bits
Bit -/7
Bit -/6
Bit 13/5
Bit 12/4
Bit 11/3
Bit 10/2
Bit 9/1
Bit 8/0
CALWD1
13:8
—
—
—
—
DOV3
DOV2
DOV1
DOV0
7:0
—
FCAL6
FCAL5
FCAL4
FCAL3
FCAL2
FCAL1
FCAL0
Register
on Page
57
Legend: — = unimplemented locations read as ‘0’. Shaded cells are not used by clock sources.
DS22331A-page 82
 2013 Microchip Technology Inc.
MCP19111
14.0
RESETS
The reset logic is used to place the MCP19111 into a
known state. The source of the reset can be
determined by using the device status bits.
There are multiple ways to reset this device:
•
•
•
•
Power-on Reset (POR)
Overtemperature Reset (OT)
MCLR Reset
WDT Reset
To allow VDD to stabilize, an optional power-up timer
can be enabled to extend the Reset time after a POR
event.
Some registers are not affected in any Reset condition;
their status is unknown on POR and unchanged in any
other Reset. Most other registers are reset to a “Reset
state” on:
•
•
•
•
Power-on Reset
MCLR Reset
MCLR Reset during Sleep
WDT Reset
WDT wake-up does not cause register resets in the
same manner as a WDT Reset since wake-up is
viewed as the resumption of normal operation. TO and
PD bits are set or cleared differently in different Reset
situations, as indicated in Table 14-1. Software can use
these bits to determine the nature of the Reset. See
Table 14-2 for a full description of Reset states of all
registers.
A simplified block diagram of the On-Chip Reset Circuit
is shown in Figure 14-1.
The MCLR Reset path has a noise filter to detect and
ignore small pulses. See Section 5.0 “Digital
Electrical
Characteristics”
for
pulse-width
specifications.
FIGURE 14-1:
SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
External
Reset
MCLR/VPP pin
Sleep
WDT
Module
VDD Rise
Detect
WDT
Time-out
Reset
Power-on Reset
VDD
S
PWRT
On-Chip
RC OSC
Chip_Reset
11-bit Ripple Counter
R
Q
Enable PWRT
Note 1: Refer to the Configuration Word register (Register 12-1).
TABLE 14-1:
TIME-OUT IN VARIOUS
SITUATIONS
Power-up
PWRTE = 0
PWRTE = 1
Wake-up from
Sleep
TPWRT
—
—
 2013 Microchip Technology Inc.
DS22331A-page 83
MCP19111
TABLE 14-2:
STATUS/PCON BITS AND THEIR SIGNIFICANCE
POR
TO
PD
Condition
0
1
1
Power-on Reset
u
0
u
WDT Reset
u
0
0
WDT Wake-up
u
u
u
MCLR Reset during normal operation
u
1
0
MCLR Reset during Sleep
Legend: u = unchanged, x = unknown
14.1
Power-on Reset (POR)
The on-chip POR circuit holds the chip in Reset until
VDD has reached a high enough level for proper
operation. To take advantage of the POR, simply
connect the MCLR pin through a resistor to VDD. This
will eliminate external RC components usually needed
to create Power-on Reset.
Note:
The POR circuit does not produce an
internal Reset when VDD declines. To
re-enable the POR, VDD must reach VSS
for a minimum of 100 µs.
When the device starts normal operation (exits the
Reset condition), device operating parameters (i.e.,
voltage, frequency, temperature, etc.) must be met to
ensure proper operation. If these conditions are not
met, the device must be held in Reset until the
operating conditions are met.
14.2
MCLR
MCP19111 has a noise filter in the MCLR Reset path.
The filter will detect and ignore small pulses.
It should be noted that a WDT Reset does not drive
MCLR pin low.
Voltages applied to the MCLR pin that exceed its
specification can result in both MCLR Resets and
excessive current beyond the device specification
during the ESD event. For this reason, Microchip
recommends that the MCLR pin no longer be tied
directly to VDD. The use of an RC network, as shown in
Figure 14-2, is suggested.
An internal MCLR option is enabled by clearing the
MCLRE bit in the Configuration Word register. When
MCLRE = 0, the Reset signal to the chip is generated
internally. When the MCLRE = 1, the MCLR pin
becomes an external Reset input. In this mode, the
MCLR pin has a weak pull-up to VDD.
FIGURE 14-2:
RECOMMENDED MCLR
CIRCUIT
VDD
R1
1 k (or greater)
MCP19111
R2
MCLR
SW1
(optional)
100 
(needed with
capacitor)
C1
0.1 µF
(optional, not critical)
DS22331A-page 84
 2013 Microchip Technology Inc.
MCP19111
14.3
Power-up Timer (PWRT)
The Power-up Timer provides a fixed 64 ms (nominal)
time-out on power-up only, from POR Reset. The
Power-up Timer operates from an internal RC
oscillator. The chip is kept in Reset as long as PWRT is
active. The PWRT delay allows the VDD to rise to an
acceptable level. A Configuration bit (PWRTE), can
disable (if set) or enable (if cleared or programmed) the
Power-up Timer.
The Power-up Timer delay will vary from chip-to-chip
due to:
• VDD variation
• Temperature variation
• Process variation
Note:
14.4
Voltage spikes below VSS at the MCLR
pin, inducing currents greater than 80 mA,
may cause latch-up. Thus, a series resistor of 50-100 should be used when
applying a “low” level to the MCLR pin,
rather than pulling this pin directly to VSS.
Watchdog Timer (WDT) Reset
The Watchdog Timer generates a Reset if the firmware
does not issue a CLRWDT instruction within the time-out
period. The TO and PD bits in the STATUS register are
changed to indicate the WDT Reset. See Section 17.0
“Watchdog Timer (WDT)” for more information.
14.5
Power-Up Timer
The Power-up Timer optionally delays device execution
after a POR event. This timer is typically used to allow
VDD to stabilize before allowing the device to start
running.
The Power-up Timer is controlled by the PWRTE bit of
Configuration Word.
14.6
Start-up Sequence
Upon the release of a POR, the following must occur
before the device will begin executing:
• Power-up Timer runs to completion (if enabled)
• Oscillator start-up timer runs to completion
• MCLR must be released (if enabled)
The total time-out will vary based on PWRTE bit status.
For example, with PWRTE bit erased (PWRT disabled),
there will be no time-out at all. Figures 14-3, 14-4
and 14-5 depict time-out sequences.
Since the time-outs occur from the POR pulse, if MCLR
is kept low long enough, the time-outs will expire. Then,
bringing MCLR high will begin execution immediately
(see Figure 14-4). This is useful for testing purposes or
to synchronize more than one MCP19111 device
operating in parallel.
14.6.1
POWER CONTROL (PCON)
REGISTER
The Power Control register PCON (address 8Eh) has
two Status bits to indicate what type of Reset occurred
last.
FIGURE 14-3:
TIME-OUT SEQUENCE ON POWER-UP (DELAYED MCLR): CASE 1
VDD
MCLR
Internal POR
TPWRT
PWRT Time-out
TIOSCST
OST Time-out
Internal Reset
 2013 Microchip Technology Inc.
DS22331A-page 85
MCP19111
FIGURE 14-4:
TIME-OUT SEQUENCE ON POWER-UP (DELAYED MCLR): CASE 2
VDD
MCLR
Internal POR
TPWRT
PWRT Time-out
TIOSCST
OST Time-out
Internal Reset
TIME-OUT SEQUENCE ON POWER-UP (MCLR WITH VDD)
FIGURE 14-5:
VDD
MCLR
Internal POR
TPWRT
PWRT Time-out
TIOSCST
OST Time-out
Internal Reset
DS22331A-page 86
 2013 Microchip Technology Inc.
MCP19111
TABLE 14-3:
INITIALIZATION CONDITION FOR REGISTERS
Address
Power-on
Reset
MCLR Reset
WDT Reset
Wake-up from Sleep through
Interrupt
Wake-up from Sleep through
WDT Time-out
—
xxxx xxxx
uuuu uuuu
uuuu uuuu
INDF
00h/80h/
100h/180h
xxxx xxxx
xxxx xxxx
uuuu uuuu
TMR0
01h/101h
xxxx xxxx
uuuu uuuu
uuuu uuuu
PCL
02h/82h/
102h/182h
0000 0000
0000 0000
PC + 1(3)
STATUS
03h/83h/
103h/183h
0001 1xxx
000q quuu(4)
uuuq quuu(4)
FSR
04h/84h/
104h/184h
xxxx xxxx
uuuu uuuu
uuuu uuuu
PORTGPA
05h
xxxx xxxx
uuuu uuuu
uuuu uuuu
PORTGPB
06h
xxx- xxxx
uuu- uuuu
uuu- uuuu
PIR1
07h
-000 --00
-000 --00
-uuu --uu
PIR2
08h
0-00 --00
0-00 --00
u-uu --uu
PCON
09h
---- -qq-
---- -uu-
---- -uu-
PCLATH
0Ah/8Ah/
10Ah/18Ah
---0 0000
---0 0000
---u uuuu
INTCON
0Bh/8Bh/
10Bh/18Bh
0000 000x
0000 000u
uuuu uuuu(2)
TMR1L
0Ch
xxxx xxxx
uuuu uuuu
uuuu uuuu
TMR1H
0Dh
xxxx xxxx
uuuu uuuu
uuuu uuuu
T1CON
0Eh
--00 --00
--uu --uu
--uu --uu
TMR2
0Fh
0000 0000
uuuu uuuu
uuuu uuuu
T2CON
10h
---- -000
---- -000
---- -uuu
PR2
11h
1111 1111
1111 1111
uuuu uuuu
PWMPHL
13h
xxxx xxxx
uuuu uuuu
uuuu uuuu
PWMPHH
14h
xxxx xxxx
uuuu uuuu
uuuu uuuu
PWMRL
15h
xxxx xxxx
uuuu uuuu
uuuu uuuu
PWMRH
16h
xxxx xxxx
uuuu uuuu
uuuu uuuu
OVCCON
19h
0000 0000
0000 0000
uuuu uuuu
OVFCON
1Ah
0--0 0000
0--0 0000
u--u uuuu
OSCTUNE
1Bh
---0 0000
---0 0000
---u uuuu
(1)
1Ch
xxxx xxxx
uuuu uuuu
uuuu uuuu
ADRESH(1)
1Dh
---- --xx
---- --uu
---- ---uu
ADCON0(1)
1Eh
-000 0000
-000 0000
-uuu uuuu
ADCON1(1)
1Fh
-000 ----
-000 ----
-uuu ----
81h/181h
1111 1111
1111 1111
uuuu uuuu
85h
1111 1111
1111 1111
uuuu uuuu
86h
1111 1111
1111 1111
uuuu uuuu
Register
W
ADRESL
OPTION_REG
TRISGPA
TRISGPB
Legend:
Note 1:
2:
3:
4:
u = unchanged, x = unknown, – = unimplemented bit, reads as ‘0’, q = value depends on condition.
If VDD goes too low, Power-on Reset will be activated and registers will be affected differently.
One or more bits in INTCON and/or PIRx will be affected (to cause wake-up).
When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector (0004h).
See Table 14-5 for Reset value for specific condition.
 2013 Microchip Technology Inc.
DS22331A-page 87
MCP19111
TABLE 14-3:
INITIALIZATION CONDITION FOR REGISTERS (CONTINUED)
Address
Power-on
Reset
MCLR Reset
WDT Reset
Wake-up from Sleep through
Interrupt
Wake-up from Sleep through
WDT Time-out (Continued)
PIE1
87h
-000 --00
-000 --00
-uuu --uu
PIE2
88h
0-00 --00
0-00 --00
u-uu --uu
APFCON
89h
---- ---0
---- ---0
---- ---u
VINLVL
90h
0-xx xxxx
0-uu uuuu
u-uu uuuu
OCCON
91h
0xxx xxxx
0uuu uuuu
uuuu uuuu
CSGSCON
93h
-xxx xxxx
-uuu uuuu
-uuu uuuu
CSDGCON
95h
0--- xxxx
0--- uuuu
u--- uuuu
VZCCON
97h
xxxx xxxx
uuuu uuuu
uuuu uuuu
CMPZCON
98h
xxxx xxxx
uuuu uuuu
uuuu uuuu
OUVCON
99h
xxxx xxxx
uuuu uuuu
uuuu uuuu
OOVCON
9Ah
xxxx xxxx
uuuu uuuu
uuuu uuuu
DEADCON
9Bh
xxxx xxxx
uuuu uuuu
uuuu uuuu
SLPCRCON
9Ch
xxxx xxxx
uuuu uuuu
uuuu uuuu
SLVGNCON
9Dh
---x xxxx
---u uuuu
---u uuuu
RELEFF
9Eh
0000 0000
0000 0000
uuuu uuuu
WPUGPA
105h
--1- 1111
--u- uuuu
--u- uuuu
WPUGPB
106h
1111 -11-
uuuu -uu-
uuuu -uu-
PE1
107h
0000 1100
0000 1100
uuuu uuuu
BUFFCON
108h
000- 0000
000- 0000
uuu- uuuu
ABECON
109h
0000 0000
0000 0000
uuuu uuuu
SSPADD
110h
0000 0000
0000 0000
uuuu uuuu
SSPBUF
111h
xxxx xxxx
uuuu uuuu
uuuu uuuu
SSPCON1
112h
0000 0000
0000 0000
uuuu uuuu
SSPCON2
113h
0000 0000
0000 0000
uuuu uuuu
SSPCON3
114h
0000 0000
0000 0000
uuuu uuuu
SSPMSK
115h
1111 1111
1111 1111
uuuu uuuu
SSPSTAT
116h
SSPADD2
117h
0000 0000
0000 0000
uuuu uuuu
Register
SSPMSK2
118h
1111 1111
1111 1111
uuuu uuuu
IOCA
185h
0000 0000
0000 0000
uuuu uuuu
IOCB
186h
0000 -000
0000 -000
uuuu -uuu
ANSELA
187h
---- 1111
---- 1111
---- uuuu
ANSELB
188h
--11 -11-
--11 -11-
--uu -uu-
PMCON1
190h
-0-- -000
-0-- -000
-u-- -uuu
PMCON2
191h
---- ----
---- ----
---- ----
PMADRL
192h
0000 0000
0000 0000
uuuu uuuu
PMADRH
193h
---- -000
---- -000
---- -uuu
PMDATL
194h
0000 0000
0000 0000
uuuu uuuu
Legend:
Note 1:
2:
3:
4:
u = unchanged, x = unknown, – = unimplemented bit, reads as ‘0’, q = value depends on condition.
If VDD goes too low, Power-on Reset will be activated and registers will be affected differently.
One or more bits in INTCON and/or PIRx will be affected (to cause wake-up).
When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector (0004h).
See Table 14-5 for Reset value for specific condition.
DS22331A-page 88
 2013 Microchip Technology Inc.
MCP19111
TABLE 14-3:
INITIALIZATION CONDITION FOR REGISTERS (CONTINUED)
Address
Power-on
Reset
MCLR Reset
WDT Reset
Wake-up from Sleep through
Interrupt
Wake-up from Sleep through
WDT Time-out (Continued)
PMDATH
195h
--00 0000
--00 0000
--uu uuuu
OSCCAL
198h
-xxx xxxx
-uuu uuuu
-uuu uuuu
DOVCAL
199h
---- xxxx
---- uuuu
---- uuuu
TTACAL
19Ah
---- xxxx
---- uuuu
---- uuuu
BGRCAL
19Bh
---- xxxx
---- uuuu
---- uuuu
VROCAL
19Ch
---- xxxx
---- uuuu
---- uuuu
ZROCAL
19Dh
---- xxxx
---- uuuu
---- uuuu
19F
1--- 0001
1--- 0001
u--- uuuu
Register
ATSTCON
Legend:
Note 1:
2:
3:
4:
14.7
u = unchanged, x = unknown, – = unimplemented bit, reads as ‘0’, q = value depends on condition.
If VDD goes too low, Power-on Reset will be activated and registers will be affected differently.
One or more bits in INTCON and/or PIRx will be affected (to cause wake-up).
When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector (0004h).
See Table 14-5 for Reset value for specific condition.
Determining the Cause of a Reset
TABLE 14-4:
Upon any Reset, multiple bits in the STATUS and
PCON register are updated to indicate the cause of the
Reset. Table 14-4 and Table 14-5 show the Reset
conditions of these registers.
TABLE 14-5:
POR TO
RESET STATUS BITS AND
THEIR SIGNIFICANCE
PD
Condition
0
1
1
Power-on Reset
u
0
u
WDT Reset
u
0
0
WDT Wake-up from Sleep
u
1
0
Interrupt Wake-up from Sleep
u
u
u
MCLR Reset during normal
operation
u
1
0
MCLR Reset during Sleep
0
0
x
Not allowed. TO is set on POR
0
x
0
Not allowed. PD is set on POR
RESET CONDITION FOR SPECIAL REGISTERS (Note 2)
Program
Counter
STATUS
Register
PCON
Register
Power-on Reset
0000h
0001 1xxx
---- -u0-
MCLR Reset during normal operation
0000h
000u uuuu
---- -uu-
MCLR Reset during Sleep
0000h
0001 0uuu
---- -uu-
WDT Reset
0000h
0000 uuuu
---- -uu-
WDT Wake-up from Sleep
PC + 1
uuu0 0uuu
---- -uu-
PC + 1(1)
uuu1 0uuu
---- -uu-
Condition
Interrupt Wake-up from Sleep
Legend:
Note 1:
2:
u = unchanged, x = unknown, - = unimplemented bit, reads as ‘0’.
When the wake-up is due to an interrupt and Global Enable bit (GIE) is set, the return address is pushed on the stack
and PC is loaded with the interrupt vector (0004h) after execution of PC + 1.
If a Status bit is not implemented, that bit will be read as ‘0’.
 2013 Microchip Technology Inc.
DS22331A-page 89
MCP19111
14.8
Power Control (PCON) Register
The Power Control (PCON) register contains flag bits
to differentiate between a:
• Power-on Reset (POR)
• Over Temperature (OT)
The PCON register bits are shown in Register 14-1.
REGISTER 14-1:
PCON – POWER CONTROL REGISTER
U-0
U-0
U-0
U-0
U-0
R/W-0
R/W-0
U-0
—
—
—
—
—
OT
POR
—
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-3
Unimplemented: Read as '0'
bit 2
OT: Overtemperature Reset Status bit
1 = No Overtemperature Reset occurred
0 = An Overtemperature Reset occurred (must be set in software after an Overtemperature occurs)
bit 1
POR: Power-on Reset Status bit
1 = No Power-on Reset occurred
0 = A Power-on Reset occurred (must be set in software after a Power-on Reset occurs)
bit 0
Unimplemented: Read as '0'
TABLE 0-1:
Name
PCON
STATUS
SUMMARY OF REGISTERS ASSOCIATED WITH RESETS
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
—
—
—
—
—
OT
POR
—
90
IPR
RP1
RP0
TO
PD
Z
DC
C
69
Legend: — = unimplemented bit, reads as ‘0’. Shaded cells are not used by Resets.
Note 1: Other (non Power-up) Resets include MCLR Reset and Watchdog Timer Reset during normal operation.
DS22331A-page 90
 2013 Microchip Technology Inc.
MCP19111
15.0
INTERRUPTS
The MCP19111 has multiple sources of interrupt:
•
•
•
•
•
•
•
•
•
•
•
•
External Interrupt (INT pin)
Interrupt-On-Change (IOC) Interrupts
Timer0 Overflow Interrupt
Timer1 Overflow Interrupt
Timer2 Match Interrupt
ADC Interrupt
System Overvoltage Error
System Under Voltage Error
System Overcurrent Error
SSP
BCL
System Input Under Voltage Error
The Interrupt Control register (INTCON) and Peripheral
Interrupt Request Registers (PIRx) record individual
interrupt requests in flag bits. The INTCON register
also has individual and global interrupt enable bits.
The Global Interrupt Enable bit, GIE of the INTCON
register, enables (if set) all unmasked interrupts, or
disables (if cleared) all interrupts. Individual interrupts
can be disabled through their corresponding enable
bits in the INTCON register and PIEx registers. GIE is
cleared on Reset.
When an interrupt is serviced, the following actions
occur automatically:
• The GIE is cleared to disable any further interrupt.
• The return address is pushed onto the stack.
• The PC is loaded with 0004h.
15.1
Interrupt Latency
For external interrupt events, such as the INT pin or
PORTGPx change interrupt, the interrupt latency will
be three or four instruction cycles. The exact latency
depends upon when the interrupt event occurs (see
Figure 15-2). The latency is the same for one or
two-cycle instructions.
15.2
GPA2/INT Interrupt
The external interrupt on the GPA2/INT pin is
edge-triggered; either on the rising edge, if the INTEDG
bit of the OPTION register is set, or the falling edge, if
the INTEDG bit is cleared. When a valid edge appears
on the GPA2/INT pin, the INTF bit of the INTCON
register is set. This interrupt can be disabled by
clearing the INTE control bit of the INTCON register.
The INTF bit must be cleared by software in the
Interrupt Service Routine before re-enabling this
interrupt. The GPA2/INT interrupt can wake-up the
processor from Sleep, if the INTE bit was set prior to
going into Sleep. See Section 16.0 “Power-Down
Mode (Sleep)” for details on Sleep, and Section 16.1
“Wake-up from Sleep” for timing of wake-up from
Sleep through GPA2/INT interrupt.
Note:
The ANSEL register must be initialized to
configure an analog channel as a digital
input. Pins configured as analog inputs
will read ‘0’ and cannot generate an
interrupt.
The firmware within the Interrupt Service Routine (ISR)
should determine the source of the interrupt by polling
the interrupt flag bits. The interrupt flag bits must be
cleared before exiting the ISR, to avoid repeated
interrupts. Because the GEI bit is cleared, any interrupt
that occurs while executing the ISR will be recorded
through its interrupt flag, but will not cause the
processor to redirect to the interrupt vector.
Note 1: Individual interrupt flag bits are set,
regardless of the status of their
corresponding mask bit or the GIE bit.
2: When an instruction that clears the GIE
bit is executed, any interrupts that were
pending for execution in the next cycle
are ignored. The interrupts, which were
ignored, are still pending to be serviced
when the GIE bit is set again.
The RETFIE instruction exists the ISR by popping the
previous address from the stack, restoring the saved
context from the shadow registers and setting the GIE
bit.
For additional information on a specific interrupt’s operation, refer to its peripheral chapter.
 2013 Microchip Technology Inc.
DS22331A-page 91
MCP19111
FIGURE 15-1:
INTERRUPT LOGIC
UVIF
UVIE
OVIF
OVIE
OCIF
OCIE
VINIF
VINIE
T0IF
T0IE
INTF
INTE
IOCF
IOCE
ADIF
ADIE
BCLIF
BCLIE
Wake-up (If in Sleep mode)
Interrupt to CPU
PEIF
PEIE
SSPIF
SSPIE
GIE
TMR2IF
TMR2IE
TMR1IF
TMR1IE
FIGURE 15-2:
INT PIN INTERRUPT TIMING
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
CLKIN
(3)
CLKOUT
(4)
INT pin
(1)
INTF flag
(INTCON reg.)
(1)
(5)
Interrupt Latency(2)
GIE bit
(INTCON reg.)
INSTRUCTION FLOW
PC
PC
Instruction
Fetched
Instruction
Executed
Inst (PC)
Inst (PC – 1)
PC + 1
Inst (PC + 1)
Inst (PC)
PC + 1
—
Dummy Cycle
0004h
0005h
Inst (0004h)
Inst (0005h)
Dummy Cycle
Inst (0004h)
Note 1: INTF flag is sampled here (every Q1).
2: Asynchronous interrupt latency = 3-4 TCY. Synchronous latency = 3 TCY, where TCY = instruction cycle time.
Latency is the same whether Inst (PC) is a single cycle or a 2-cycle instruction.
3: CLKOUT is available only in INTOSC and RC Oscillator modes.
4: For minimum width of INT pulse, refer to AC specifications in Section 5.0 “Digital Electrical Characteristics”.
5: INTF is enabled to be set any time during the Q4-Q1 cycles.
DS22331A-page 92
 2013 Microchip Technology Inc.
MCP19111
15.3
Interrupt Control Registers
15.3.1
Note:
INTCON REGISTER
The INTCON register is a readable and writable register, that contains the various enable and flag bits for the
TMR0 register overflow, interrupt-on-change and external INT pin interrupts.
REGISTER 15-1:
Interrupt flag bits are set when an interrupt
condition occurs, regardless of the state of
its corresponding enable bit or the Global
Enable bit, GIE, of the INTCON register.
User software should ensure the appropriate interrupt flag bits are clear prior to
enabling an interrupt.
INTCON – INTERRUPT CONTROL REGISTER
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-x
GIE
PEIE
T0IE
INTE
IOCE
T0IF
INTF
IOCF
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
GIE: Global Interrupt Enable bit
1 = Enables all unmasked interrupts
0 = Disables all interrupts
bit 6
PEIE: Peripheral Interrupt Enable bit
1 = Enables all unmasked peripheral interrupts
0 = Disables all peripheral interrupts
bit 5
T0IE: TMR0 Overflow Interrupt Enable bit
1 = Enables the TMR0 interrupt
0 = Disables the TMR0 interrupt
bit 4
INTE: INT External Interrupt Enable bit
1 = Enables the INT external interrupt
0 = Disables the INT external interrupt
bit 3
IOCE: Interrupt-on-Change Enable bit(1)
1 = Enables the interrupt-on-change
0 = Disables the interrupt-on-change
bit 2
T0IF: TMR0 Overflow Interrupt Flag bit(2)
1 = TMR0 register has overflowed (must be cleared in software)
0 = TMR0 register did not overflow
bit 1
INTF: External Interrupt Flag bit
1 = The external interrupt occurred (must be cleared in software)
0 = The external interrupt did not occur
bit 0
IOCF: Interrupt-on-Change Interrupt Flag bit
1 = When at least one of the interrupt-on-change pins changed state
0 = None of the interrupt-on-change pins have changed state
Note 1:
2:
x = Bit is unknown
IOC register must also be enabled.
T0IF bit is set when TMR0 rolls over. TMR0 is unchanged on Reset and should be initialized before clearing T0IF bit.
 2013 Microchip Technology Inc.
DS22331A-page 93
MCP19111
15.3.1.1
PIE1 Register
The PIE1 register contains the Peripheral Interrupt
Enable bits, as shown in Register 15-2.
Note 1: Bit PEIE of the INTCON register must be
set to enable any peripheral interrupt.
REGISTER 15-2:
PIE1 – PERIPHERAL INTERRUPT ENABLE REGISTER 1
U-0
R/W-0
R/W-0
R/W-0
U-0
U-0
R/W-0
R/W-0
—
ADIE
BCLIE
SSPIE
—
—
TMR2IE
TMR1IE
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
UNIMPLEMENTED: Read as '0'
bit 6-0
ADIE: ADC Interrupt Enable bit
1 = Enables the ADC interrupt
0 = Disables the ADC interrupt
bit 6-0
BCLIE: MSSP Bus Collision Interrupt Enable bit
1 = Enables the MSSP Bus Collision Interrupt
0 = Disables the MSSP Bus Collision Interrupt
bit 6-0
SSPIE: Synchronous Serial Port (MSSP) Interrupt Enable bit
1 = Enables the MSSP interrupt
0 = Disables the MSSP interrupt
bit 6-0
UNIMPLEMENTED: Read as 0
bit 6-0
TMR2IE: Timer2 Interrupt Enable
1 = Enables the Timer2 interrupt
0 = Disables the Timer2 interrupt
bit 6-0
TMR1IE: Timer1 Interrupt Enable
1 = Enables the Timer1 interrupt
0 = Disables the Timer1 interrupt
DS22331A-page 94
x = Bit is unknown
 2013 Microchip Technology Inc.
MCP19111
15.3.1.2
PIE2 Register
The PIE2 register contains the Peripheral Interrupt
Enable bits, as shown in Register 15-3.
Note 1: Bit PEIE of the INTCON register must be
set to enable any peripheral interrupt.
REGISTER 15-3:
PIE2 – PERIPHERAL INTERRUPT ENABLE REGISTER 2
U-0
U-0
R/W-0
R/W-0
U-0
U-0
R/W-0
U-0
UVIE
—
OCIE
OVIE
—
—
VINIE
—
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
UVIE: Output Under Voltage Interrupt enable bit
1 = Enables the UV interrupt
0 = Disables the UV interrupt
bit 6
UNIMPLEMENTED: Read as '0'
bit 5
OCIE: Output Overcurrent Interrupt enable bit
1 = Enables the OC interrupt
0 = Disables the OC interrupt
bit 4
OVIE: Output Overvoltage Interrupt enable bit
1 = Enables the OV interrupt
0 = Disables the OV interrupt
bit 3-2
UNIMPLEMENTED: Read as '0'
bit 1
VINIE: VIN UVLO Interrupt Enable
1 = Enables the VIN UVLO interrupt
0 = Disables the VIN UVLO interrupt
bit 0
UNIMPLEMENTED: Read as '0'
 2013 Microchip Technology Inc.
x = Bit is unknown
DS22331A-page 95
MCP19111
15.3.1.3
PIR1 Register
The PIR1 register contains the Peripheral Interrupt
Flag bits, as shown in Register 15-4.
Note 1: Interrupt flag bits are set when an
interrupt condition occurs, regardless of
the state of its corresponding enable bit
or the Global Enable bit, GIE of the
INTCON register. User software should
ensure the appropriate interrupt flag bits
are clear prior to enabling an interrupt.
REGISTER 15-4:
PIR1 – PERIPHERAL INTERRUPT FLAG REGISTER 1
U-0
R/W-0
R/W-0
R/W-0
U-0
U-0
R/W-0
R/W-0
—
ADIF
BCLIF
SSPIF
—
—
TMR2IF
TMR1IF
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
UNIMPLEMENTED: Read as '0'
bit 6
ADIF: ADC Interrupt Flag bit
1 = ADC conversion complete
0 = ADC conversion has not completed or has not been started
bit 5
BCLIF: MSSP Bus Collision Interrupt Flag bit
1 = Interrupt is pending
0 = Interrupt is not pending
bit 4
SSPIF: Synchronous Serial Port (MSSP) Interrupt Flag bit
1 = Interrupt is pending
0 = Interrupt is not pending
bit 3-2
UNIMPLEMENTED: Read as '0'
bit 1
TMR2IF: Timer2 to PR2 Match Interrupt Flag
1 = Timer2 to PR2 match occurred (must be cleared in software)
0 = Timer2 to PR2 match did not occur
bit 0
TMR1IF: Timer1 Interrupt Flag
1 = Timer1 rolled over (must be cleared in software)
0 = Timer1 has not rolled over
DS22331A-page 96
x = Bit is unknown
 2013 Microchip Technology Inc.
MCP19111
15.3.1.4
PIR2 Register
The PIR2 register contains the Peripheral Interrupt
Flag bits, as shown in Register 15-5.
Note 1: Interrupt flag bits are set when an
interrupt condition occurs, regardless of
the state of its corresponding enable bit
or the Global Enable bit, GIE of the
INTCON register. User software should
ensure the appropriate interrupt flag bits
are clear prior to enabling an interrupt.
REGISTER 15-5:
PIR2 – PERIPHERAL INTERRUPT FLAG REGISTER 2
R/W-0
U-0
R/W-0
R/W-0
U-0
U-0
R/W-0
U-0
UVIF
—
OCIF
OVIF
—
—
VINIF
—
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
UVIF: Output undervoltage error interrupt flag bit
1 = Output undervoltage error has occurred
0 = Output undervoltage error has not occurred
bit 6
UNIMPLEMENTED: Read as '0'
bit 5
OCIF: Output overcurrent error interrupt flag bit
1 = Output overcurrent error has occurred
0 = Output overcurrent error has not occurred
bit 4
OVIF: Output overvoltage error interrupt flag bit
1 = Output overvoltage error has occurred
0 = Output overvoltage error has not occurred
bit 3-2
UNIMPLEMENTED: Read as '0'
bit 1
VINIF: VIN Status bit
1 = VIN is below acceptable level
0 = VIN is at acceptable level
bit 0
UNIMPLEMENTED: Read as '0'
TABLE 15-1:
Name
INTCON
x = Bit is unknown
SUMMARY OF REGISTERS ASSOCIATED WITH INTERRUPTS
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
GIE
PEIE
T0IE
INTE
IOCE
T0IF
INTF
IOCF
93
RAPU
INTEDG
T0CE
T0SE
PSA
PS2
PS1
PS0
75
PIE1
—
ADIE
BCLIE
SSPIE
—
—
TMR2IE
TMR1IE
94
OPTION_REG
PIE2
UVIE
—
OCIE
OVIE
—
—
VINIE
—
95
PIR1
—
ADIF
BCLIF
SSPIF
—
—
TMR2IF
TMR1IF
96
PIR2
UVIF
—
OCIF
OVIF
—
—
VINIF
—
97
Legend: — = unimplemented locations read as ‘0’. Shaded cells are not used by Interrupts.
 2013 Microchip Technology Inc.
DS22331A-page 97
MCP19111
15.4
Context Saving During Interrupts
During an interrupt, only the return PC value is saved
on the stack. Typically, users may wish to save key
registers during an interrupt (e.g., W and STATUS
registers). This must be implemented in software.
Temporary
holding
registers
W_TEMP
and
STATUS_TEMP should be placed in the last 16 bytes
of GPR (see Figure 11-2). These 16 locations are
common to all banks and do not require banking. This
makes context save and restore operations simpler.
The code shown in Example 15-1 can be used to:
•
•
•
•
•
Store the W register
Store the STATUS register
Execute the ISR code
Restore the Status (and Bank Select Bit register)
Restore the W register
Note:
The MCP19111 device does not require
saving the PCLATH. However, if
computed GOTOs are used in both the ISR
and the main code, the PCLATH must be
saved and restored in the ISR.
EXAMPLE 15-1:
MOVWF
SWAPF
SAVING STATUS AND W REGISTERS IN RAM
W_TEMP
STATUS,W
MOVWF
STATUS_TEMP
:
:(ISR)
:
SWAPF
STATUS_TEMP,W
MOVWF
SWAPF
SWAPF
STATUS
W_TEMP,F
W_TEMP,W
DS22331A-page 98
;Copy W to TEMP
;Swap status to
;Swaps are used
;Save status to
register
be saved into W
because they do not affect the status bits
bank zero STATUS_TEMP register
;Insert user code here
;Swap STATUS_TEMP register into W
;(sets bank to original state)
;Move W into STATUS register
;Swap W_TEMP
;Swap W_TEMP into W
 2013 Microchip Technology Inc.
MCP19111
16.0
POWER-DOWN MODE (SLEEP)
16.1
Wake-up from Sleep
The Power-Down mode is entered by executing a
SLEEP instruction.
The device can wake-up from Sleep through one of the
following events:
Upon entering Sleep mode, the following conditions
exist:
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
6.
7.
8.
9.
WDT will be cleared but keeps running, if
enabled for operation during Sleep.
PD bit of the STATUS register is cleared.
TO bit of the STATUS register is set.
CPU clock is not disabled.
Timer1 oscillator is unaffected, and peripherals
that operate from it may continue operation in
Sleep.
ADC is unaffected.
I/O ports maintain the status they had before
SLEEP was executed (driving high, low or
high-impedance).
Resets other than WDT are not affected by
Sleep mode.
Analog circuitry is unaffected by execution of
SLEEP instruction.
Refer to individual chapters for more details on
peripheral operation during Sleep.
To minimize current consumption, the following
conditions should be considered:
•
•
•
•
•
I/O pins should not be floating
External circuitry sinking current from I/O pins
Internal circuitry sourcing current from I/O pins
Current draw from pins with internal weak pull-ups
Modules using Timer1 oscillator
I/O pins that are high-impedance inputs should be
pulled to VDD or GND externally to avoid switching
currents caused by floating inputs.
The SLEEP instruction does not affect the analog
circuitry. The enable state of the analog circuitry does
not change with the execution of the SLEEP instruction.
External Reset input on MCLR pin, if enabled
POR Reset
Watchdog Timer, if enabled
Any external interrupt
Interrupts by peripherals capable of running
during Sleep (see individual peripheral for more
information)
The first two events will cause a device Reset. The last
three events are considered a continuation of program
execution. To determine whether a device Reset or
wake-up event occurred, refer to Section 14.7 “Determining the Cause of a Reset”.
The following peripheral interrupts can wake the device
from Sleep:
1.
2.
3.
4.
Timer1 interrupt. Timer1 must be operating as
an asynchronous counter
A/D conversion
Interrupt-on-change
External Interrupt from INT pin
When the SLEEP instruction is being executed, the next
instruction (PC + 1) is prefetched. For the device to
wake-up through an interrupt event, the corresponding
interrupt enable bit must be enabled. Wake-up will
occur regardless of the state of the GIE bit. If the GIE
bit is disabled, the device continues execution at the
instruction after the SLEEP instruction. If the GIE bit is
enabled, the device executes the instruction after the
SLEEP instruction, the device will then call the Interrupt
Service Routine. In cases where the execution of the
instruction following SLEEP is not desirable, the user
should have an NOP after the SLEEP instruction.
The WDT is cleared when the device wakes up from
Sleep, regardless of the source of wake-up.
Examples of internal circuitry that might be sourcing
current include modules, such as the DAC. See
Section 22.0 “Analog-to-Digital Converter (ADC)
Module” for more information on this module.
 2013 Microchip Technology Inc.
DS22331A-page 99
MCP19111
16.1.1
WAKE-UP USING INTERRUPTS
When global interrupts are disabled (GIE cleared) and
any interrupt source has both its interrupt enable bit
and interrupt flag bit set, one of the following will occur:
• If the interrupt occurs before the execution of a
SLEEP instruction:
- SLEEP instruction will execute as an NOP
- WDT and WDT prescaler will not be cleared
- TO bit of the STATUS register will not be set
- PD bit of the STATUS register will not be
cleared
FIGURE 16-1:
• If the interrupt occurs during or after the
execution of a SLEEP instruction:
- SLEEP instruction will be completely
executed
- Device will immediately wake-up from Sleep
- WDT and WDT prescaler will be cleared
- TO bit of the STATUS register will be set
- PD bit of the STATUS register will be cleared
Even if the flag bits were checked before executing a
SLEEP instruction, it may be possible for flag bits to
become set before the SLEEP instruction completes. To
determine whether a SLEEP instruction executed, test
the PD bit. If the PD bit is set, the SLEEP instruction
was executed as an NOP.
WAKE-UP FROM SLEEP THROUGH INTERRUPT
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
OSC
TOST
Interrupt Latency(1)
Interrupt flag
GIE bit
(INTCON reg.)
Processor in
Sleep
Instruction Flow
PC
PC
PC + 1
Instruction Inst(PC) = Sleep Inst(PC + 1)
Fetched
Instruction
Sleep
Inst(PC - 1)
Executed
PC + 2
PC + 2
PC + 2
0004h
Inst(0004h)
Inst(PC + 2)
Inst(PC + 1) Dummy Cycle Dummy Cycle
0005h
Inst(0005h)
Inst(0004h)
Note 1: GIE = 1 assumed. In this case, after wake-up, the processor calls the ISR at 0004h. If GIE = 0, execution
will continue in-line.
TABLE 16-1:
Name
INTCON
SUMMARY OF REGISTERS ASSOCIATED WITH POWER-DOWN MODE
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register on
Page
GIE
PEIE
T0IE
INTE
IOCE
T0IF
INTF
IOCF
93
IOCA
IOCA7
IOCA6
IOCA5
IOCA4
IOCA3
IOCA2
IOCA1
IOCA0
120
IOCB
IOCB7
IOCB6
IOCB5
IOCB4
—
IOCB2
IOCB1
IOCB0
120
PIE1
—
ADIE
BCLIE
SSPIE
—
—
TMR2IE
TMR1IE
94
PIE2
UVIE
—
OCIE
OVIE
—
—
VINIE
—
95
PIR1
—
ADIF
BCLIF
SSPIF
—
—
TMR2IF
TMR1IF
96
PIR2
UVIF
—
OCIF
OVIF
—
—
VINIF
—
97
IRP
RP1
RP0
TO
PD
Z
DC
C
69
STATUS
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used in Power-down mode.
DS22331A-page 100
 2013 Microchip Technology Inc.
MCP19111
17.0
WATCHDOG TIMER (WDT)
17.2
The WDT has a nominal time-out period of 18 ms (with
no prescaler). The time-out periods vary with
temperature, VDD and process variations from part to
part (see Table 5-4). If longer time-out periods are
desired, a prescaler with a division ratio of up to 1:128
can be assigned to the WDT under software control by
writing to the OPTION register. Thus, time-out periods
up to 2.3 seconds can be realized.
The Watchdog Timer is a free running timer. The WDT
is enabled by setting the WDTE bit of the Configuration
Word (default setting).
During normal operation, a WDT time-out generates a
device Reset. If the device is in Sleep mode, a WDT
time-out causes the device to wake-up and continue
with normal operation.
The WDT can be permanently disabled by clearing the
WDTE bit of the Configuration bit. See Section 12.1
“Configuration Word” for more information.
17.1
The CLRWDT and SLEEP instructions clear the WDT
and the prescaler, if assigned to the WDT, and prevent
it from timing out and generating a device Reset.
The TO bit in the STATUS register will be cleared upon
a Watchdog Timer time-out.
Watchdog Timer (WDT) Operation
During normal operation, a WDT time-out generates a
device RESET. If the device is in SLEEP mode, a WDT
time-out causes the device to wake-up and continue
with normal operation; this is known as a WDT wakeup. The WDT can be permanently disabled by clearing
the WDTE configuration bit.
17.3
WDT Programming
Considerations
Under worst-case conditions (i.e., VDD = Minimum,
Temperature = Maximum, Maximum WDT prescaler), it
may take several seconds before a WDT time-out
occurs.
The postscaler assignment is fully under software
control and can be changed during program execution.
FIGURE 17-1:
WDT Period
WATCHDOG TIMER WITH SHARED PRESCALER BLOCK DIAGRAM
FOSC/4
Data Bus
0
8
1
Sync
2 TCY
1
T0CKI
pin
T0SE
TMR0
0
0
T0CS
Set Flag bit T0IF
on Overflow
PSA
8-bit
Prescaler
1
PSA
8
PS<2:0>
Watchdog
Timer
1
WDT
Time-out
0
PSA
WDTE
Note 1: T0SE, T0CS, PSA, PS<2:0> are bits in the OPTION_REG register.
2: WDTE bit is in the Configuration Word register.
 2013 Microchip Technology Inc.
DS22331A-page 101
MCP19111
TABLE 17-1:
WDT STATUS
Conditions
WDT
WDTE = 0
CLRWDT Command
Cleared
Exit Sleep
TABLE 17-2:
SUMMARY OF REGISTERS ASSOCIATED WITH WATCHDOG TIMER
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
OPTION_REG
RAPU
INTEDG
T0CS
T0SE
PSA
Bit 2
Bit 1
Bit 0
PS<2:0>
Register on
Page
75
Legend: Shaded cells are not used by the Watchdog Timer.
Note 1: See Register 12-1 for operation of all Configuration Word register bits.
TABLE 17-3:
SUMMARY OF CONFIGURATION WORD ASSOCIATED WITH WATCHDOG TIMER
Name
Bits
Bit -/7
Bit -/6
Bit 13/5
CONFIG
13:8
7:0
—
—
DBGEN
—
CP
MCLRE
Bit 11/3
Bit 10/2
Bit 9/1
Bit 8/0
Register
on Page
—
WRT1
WRT0
—
—
79
PWRTE
WDTE
—
—
—
Bit 12/4
Legend: — = unimplemented location, read as ‘1’. Shaded cells are not used by Watchdog Timer.
DS22331A-page 102
 2013 Microchip Technology Inc.
MCP19111
18.0
FLASH PROGRAM MEMORY
CONTROL
The Flash program memory is readable and writable
during normal operation (full VIN range). This memory
is not directly mapped in the register file space.
Instead, it is indirectly addressed through the Special
Function Registers (see Registers 18-1 to 18-5).
There are six SFRs used to read and write this
memory:
•
•
•
•
•
•
PMCON1
PMCON2
PMDATL
PMDATH
PMADRL
PMADRH
When interfacing the program memory block, the
PMDATL and PMDATH registers form a two-byte
word, which holds the 14-bit data for read/write, and
the PMADRL and PMADRH registers form a two-byte
word, which holds the 13-bit address of the FLASH
location being accessed. These devices have 4K
words of program Flash with an address range from
0000h to 0FFFh.
The program memory allows single word read and a
by four word write. A four word write automatically
erases the row of the location and writes the new data
(erase before write).
The write time is controlled by an on-chip timer. The
write/erase voltages are generated by an on-chip
charge pump rated to operate over the voltage range
of the device for byte or word operations.
18.1
PMADRH and PMADRL Registers
The PMADRH and PMADRL registers can address up
to a maximum of 4K words of program memory.
When selecting a program address value, the Most
Significant Byte (MSB) of the address is written to the
PMADRH register and the Least Significant Byte
(LSB) is written to the PMADRL register.
18.2
PMCON1 and PMCON2 Registers
PMCON1 is the control register for the data program
memory accesses.
Control bits RD and WR initiate read and write,
respectively. These bits cannot be cleared, only set in
software. They are cleared in hardware at completion
of the read or write operation. The inability to clear the
WR bit in software prevents the accidental premature
termination of a write operation.
The WREN bit, when set, will allow a write operation.
On power-up, the WREN bit is clear.
The CALSEL bit allows the user to read locations in
test memory in case there are calibration bits stored in
the calibration word locations that need to be
transferred to SFR trim registers. The CALSEL bit is
only for reads, and if a write operation is attempted
with CALSEL = 1, no write will occur.
PMCON2 is not a physical register. Reading PMCON2
will read all '0's. The PMCON2 register is used
exclusively in the flash memory write sequence.
When the device is code protected, the CPU may
continue to read and write the Flash program memory.
Depending on the settings of the Flash Program
Memory Enable (WRT<1:0>) bits, the device may or
may not be able to write certain blocks of the program
memory, however, reads of the program memory are
allowed.
When the Flash Program Memory Code Protection
(CP) bit is enabled, the program memory is code
protected, and the device programmer (ICSP) cannot
access data or program memory.
 2013 Microchip Technology Inc.
DS22331A-page 103
MCP19111
18.3
Flash Program Memory
Control Registers
REGISTER 18-1:
R/W-0
PMDATL: PROGRAM MEMORY DATA LOW BYTE REGISTER
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
PMDATL<7:0>
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
x = Bit is unknown
PMDATL<7:0>: 8 Least Significant Data bits to Write or Read from Program Memory
REGISTER 18-2:
R/W-0
PMADRL: PROGRAM MEMORY ADDRESS LOW BYTE REGISTER
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
PMADRL<7:0>
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
x = Bit is unknown
PMADRL<7:0>: 8 Least Significant Address bits for Program Memory Read/Write Operation
REGISTER 18-3:
PMDATH: PROGRAM MEMORY DATA HIGH BYTE REGISTER
U-0
U-0
—
—
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
PMDATH<5:0>
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-0
PMDATH<5:0>: 6 Most Significant Data bits from Program Memory
DS22331A-page 104
x = Bit is unknown
 2013 Microchip Technology Inc.
MCP19111
REGISTER 18-4:
PMADRH: PROGRAM MEMORY ADDRESS HIGH BYTE REGISTER
U-0
U-0
U-0
U-0
—
—
—
—
R/W-0
R/W-0
R/W-0
R/W-0
PMADRH<3:0>
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-4
Unimplemented: Read as ‘0’
bit 3-0
PMADRH<3:0>: Specifies the 4 Most Significant Address bits or High bits for Program Memory Reads.
REGISTER 18-5:
PMCON1 – PROGRAM MEMORY CONTROL REGISTER 1
U-1
R/W-0
U-0
U-0
U-0
R/W-0
R/S-0
R/S-0
—
CALSEL
—
—
—
WREN
WR
RD
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
Unimplemented: Read as '1'
bit 6
CALSEL: Program Memory calibration space select
1 = Select test memory area for reads only (for loading calibration trim registers)
0 = Select user area for reads
bit 5-3
Unimplemented: Read as '0'
bit 2
WREN: Program Memory Write Enable bit
1 = Allows write cycles
0 = Inhibits write to the EEPROM
bit 1
WR: Write Control bit
1 = Initiates a write cycle to program memory. (The bit is cleared by hardware when write is complete.
The WR bit can only be set (not cleared) in software.)
0 = Write cycle to the Flash memory is complete
bit 0
RD: Read Control bit
1 = Initiates a program memory read. (The read takes one cycle. The RD is cleared in hardware; the
RD bit can only be set (not cleared) in software).
0 = Does not initiate a Flash memory read
 2013 Microchip Technology Inc.
DS22331A-page 105
MCP19111
18.3.1
READING THE FLASH PROGRAM
MEMORY
To read a program memory location, the user must
write two bytes of the address to the PMADRL and
PMADRH registers, and then set control bit RD
(PMCON1<0>). Once the read control bit is set, the
program memory Flash controller will use the second
instruction cycle after to read the data. This causes the
second instruction immediately following the “BSF
PMCON1,RD” instruction to be ignored. The data is
available, in the very next cycle, in the PMDATL and
PMDATH registers; it can be read as two bytes in the
following instructions. PMDATL and PMDATH registers will hold this value until another read or until it is
written to by the user (during a write operation).
EXAMPLE 18-1:
FLASH PROGRAM READ
BANKSELPM_ADR; Change STATUS bits RP1:0 to select bank with PMADR
MOVLWMS_PROG_PM_ADDR;
MOVWFPMADRH; MS Byte of Program Address to read
MOVLWLS_PROG_PM_ADDR;
MOVWFPMADRL; LS Byte of Program Address to read
BANKSELPMCON1; Bank to containing PMCON1
BSF PMCON1, RD; EE Read
NOP
; First instruction after BSF PMCON1,RD executes normally
NOP
; Any instructions here are ignored as program
; memory is read in second cycle after BSF PMCON1,RD
;
BANKSELPMDATL; Bank to containing PMADRL
MOVFPMDATL, W; W = LS Byte of Program PMDATL
MOVFPMDATH, W; W = MS Byte of Program PMDATL
FIGURE 18-1:
FLASH PROGRAM MEMORY READ CYCLE EXECUTION – NORMAL MODE
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Flash ADDR
PC
Flash DATA
PC + 1
INSTR (PC)
PMADRH,PMADRL
INSTR (PC + 1)
PC+3
PC
+3
PMDATH,PMDATL
INSTR (PC - 1) BSF PMCON1,RD INSTR (PC + 1)
Executed here
Executed here
Executed here
PC + 4
PC + 5
INSTR (PC + 3) INSTR (PC + 4)
NOP
Executed here
INSTR (PC + 3)
Executed here
INSTR (PC + 4)
Executed here
RD bit
PMDATH
PMDATL
Register
EERHLT
DS22331A-page 106
 2013 Microchip Technology Inc.
MCP19111
18.3.2
WRITING TO THE FLASH
PROGRAM MEMORY
A word of the Flash program memory may only be
written to if the word is in an unprotected segment of
memory, as defined in Section 12.1 “Configuration
Word” (bits WRT1:WRT0).
Note: The write protect bits are used to protect the
users’ program from modification by the
user’s code. They have no effect when
programming is performed by ICSP. The
code-protect bits, when programmed for
code protection, will prevent the program
memory from being written via the ICSP
interface.
Flash program memory must be written in four-word
blocks. See Figures 18-2 and 18-3 for more details. A
block consists of four words with sequential addresses,
with a lower boundary defined by an address, where
PMADRL<1:0> = 00. All block writes to program
memory are done as 16-word erase by four-word write
operations. The write operation is edge-aligned and
cannot occur across boundaries.
To write program data, it must first be loaded into the
buffer registers (see Figure 18-2). This is accomplished
by first writing the destination address to PMADRL and
PMADRH, and then writing the data to PMDATL and
PMDATH. After the address and data have been set,
then the following sequence of events must be
executed:
1.
2.
Write 55h, then AAh, to PMCON2 (Flash
programming sequence).
Set the WR control bit of the PMCON1 register.
All four buffer register locations should be written to
with correct data. If less than four words are being written to in the block of four words, then a read from the
program memory location(s) not being written to must
be performed. This takes the data from the program
location(s) not being written and loads it into the
PMDATL and PMDATH registers. Then the sequence
of events to transfer data to the buffer registers must be
executed.
To transfer data from the buffer registers to the program
memory, the PMADRL and PMADRH must point to the
last
location
in
the
four-word
block
(PMADRL<1:0> = 11). Then the following sequence of
events must be executed:
1.
2.
Write 55h, then AAh, to PMCON2 (Flash
programming sequence).
Set control bit WR of the PMCON1 register to
begin the write operation.
 2013 Microchip Technology Inc.
The user must follow the same specific sequence to
initiate the write for each word in the program block,
writing each program word in sequence (000, 001,
010, 011). When the write is performed on the last
word (PMADRL<1:0> = 11), a block of sixteen words is
automatically erased and the content of the four-word
buffer registers are written into the program memory.
After the “BSF PMCON1,WR” instruction, the processor
requires two cycles to set up the erase/write operation.
The user must place two NOP instructions after the WR
bit is set. Since data is being written to buffer registers,
the writing of the first three words of the block appears
to occur immediately. The processor will halt internal
operations for the typical 4 ms, only during the cycle in
which the erase takes place (i.e., the last word of the
sixteen-word block erase). This is not Sleep mode, as
the clocks and peripherals will continue to run. After
the four-word write cycle, the processor will resume
operation with the third instruction after the PMCON1
write instruction. The above sequence must be
repeated for the higher 12 words.
Note: An erase is only initiated for the write of four
words, just after a row boundary; or
PMCON1<WR> set with PMADRL<3:0> =
xxxx0011.
Refer to Figure 18-2 for a block diagram of the buffer
registers and the control signals for test mode.
18.3.3
PROTECTION AGAINST SPURIOUS
WRITE
There are conditions when the device should not write
to the program memory. To protect against spurious
writes, various mechanisms have been built in. On
power-up, WREN is cleared. Also, the Power-up Timer
(72 ms duration) prevents program memory writes.
The write initiate sequence, and the WREN bit, help
prevent an accidental write during a power glitch or
software malfunction.
18.3.4
OPERATION DURING CODE PROTECT
When the device is code protected, the CPU is able to
read and write unscrambled data to the program
memory. The test mode access is disabled.
18.3.5
OPERATION DURING WRITE PROTECT
When the program memory is write protected, the
CPU can read and execute from the program memory.
The portions of program memory that are write protected can not be modified by the CPU using the
PMCON registers. The write protection has no effect in
ICSP mode.
DS22331A-page 107
MCP19111
FIGURE 18-2:
BLOCK WRITES TO 4K FLASH PROGRAM MEMORY
7
5
0
07
PMDATH
PMDATL
6
8
14
14
First word of block
to be written
14
PMADRL<1:0> = 00
PMADRL<1:0> = 01
Buffer Register
PMADRL<1:0> = 10
Buffer Register
If at new row
sixteen words of
Flash are erased,
then four buffers
are transferred to
Flash automatically
after this word is
written
14
PMADRL<1:0> = 11
Buffer Register
Buffer Register
Program Memory
FIGURE 18-3:
FLASH PROGRAM MEMORY LONG WRITE CYCLE EXECUTION
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1
Flash
ADDR
PMADRH,PMADRL
PC + 1
INSTR
(PC)
Flash
DATA
Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
INSTR
(PC + 1)
ignored
read
BSF PMCON1,WR INSTR (PC + 1)
Executed here
Executed here
PMDATH,PMDATL
Processor halted
EE Write Time
PC + 2
PC + 3
PC + 4
INSTR (PC+2) INSTR (PC+3)
(INSTR (PC + 2)
NOP
INSTR (PC + 3)
NOP
Executed here Executed here Executed here
Flash
Memory
Location
WR bit
PMWHLT
DS22331A-page 108
 2013 Microchip Technology Inc.
MCP19111
19.0
I/O PORTS
In general, when a peripheral is enabled, that pin may
not be used as a general purpose I/O pin.
Each port has two registers for its operation. These
registers are:
• TRISx registers (data direction register)
• PORTGPx registers (reads the levels on the pins
of the device)
Some ports may have one or more of the following
additional registers. These registers are:
• ANSELx (analog select)
• WPUx (weak pull-up)
Ports with analog functions also have an ANSELx
register, which can disable the digital input and save
power. A simplified model of a generic I/O port, without
the interfaces to other peripherals, is shown in
Figure 19-1.
FIGURE 19-1:
GENERIC I/O PORTGPX
OPERATION
Read LATx
D
TRISx
Q
Write LATx
Write PORTx
VDD
CK
Data Register
Data Bus
I/O pin
Read PORTx
To peripherals
ANSELx
EXAMPLE 19-1:
;
;
;
;
VSS
INITIALIZING PORTA
This code example illustrates
initializing the PORTGPA register. The
other ports are initialized in the same
manner.
BANKSEL
CLRF
BANKSEL
CLRF
BANKSEL
MOVLW
MOVWF
PORTGPA;
PORTGPA;Init PORTA
ANSELA;
ANSELA;digital I/O
TRISGPA;
B'00011111';Set GPA<4:0> as
;inputs
TRISGPA;and set GPA<7:6> as
;outputs
 2013 Microchip Technology Inc.
DS22331A-page 109
MCP19111
19.1
Alternate Pin Function
The Alternate Pin Function Control (APFCON) register
is used to steer specific peripheral input and output
functions between different pins. The APFCON register
is shown in Register 19-1. For this device family, the
following function can be moved between different
pins.:
This bit has no effect on the values of any TRIS
register. PORT and TRIS overrides will be routed to the
correct pin. The unselected pin will be unaffected.
• Frequency Synchronization Clock Input/Output
REGISTER 19-1:
APFCON: ALTERNATE PIN FUNCTION CONTROL REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
U-0
R/W-0
—
—
—
—
—
—
—
CLKSEL
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-1
Unimplemented: Read as ‘0’
bit 0
CLKSEL: Pin Selection bit
1 = Multi-phase or multiple output clock function is on GPB5
0 = Multi-phase or multiple output clock function is on GPA1
19.2
PORTGPA and TRISGPA Registers
PORTGPA is an 8-bit wide, bidirectional port consisting
of five CMOS I/O, two open drain I/O, and one open
drain input-only pin. The corresponding data direction
register is TRISGPA (Register 19-3). Setting a
TRISGPA bit (= 1) will make the corresponding
PORTGPA pin an input (i.e., disable the output driver).
Clearing a TRISGPA bit (= 0) will make the
corresponding PORTGPA pin an output (i.e., enables
output driver). The exception is GPA5, which is input
only and its TRISGPA bit will always read as ‘1’.
Example 19-1 shows how to initialize an I/O port.
Reading the PORTGPA register (Register 19-2) reads
the status of the pins, whereas writing to it will write to
the PORT latch. All write operations are read-modifywrite operations.
The TRISGPA register (Register 19-3) controls the
PORTGPA pin output drivers, even when they are
being used as analog inputs. The user must ensure the
bits in the TRISGPA register are maintained set when
using them as analog inputs. I/O pins configured as
analog input always read ‘0’. If the pin is configured for
a digital output (either port or alternate function), the
TRISGPA bit must be cleared in order for the pin to
drive the signal, and a read will reflect the state of the
pin.
DS22331A-page 110
19.2.1
x = Bit is unknown
INTERRUPT-ON-CHANGE
Each PORTGPA pin is individually configurable as an
interrupt-on-change pin. Control bits IOCB<7:4> and
IOCB<2:0> enable or disable the interrupt function for
each pin. The interrupt-on-change feature is disabled
on a Power-on Reset. Reference Section 20.0
“Interrupt-On-Change” for more information.
19.2.2
WEAK PULL-UPS
PORTGPA <3:0> and PORTGPA5 have an internal weak
pull-up. PORTGPA<7:6> are special ports for the SSP
module and do not have weak pull-ups. Individual control
bits can enable or disable the internal weak pull-ups (see
Register 19-4). The weak pull-up is automatically turned
off when the port pin is configured as an output, an
alternative function or on a Power-on Reset setting the
RAPU bit of the OPTION register. The weak pull-up on
GPA5 is enabled when configured as MCLR pin by setting
bit 5 of the Configuration word, and disabled when GPA5
is an I/O. There is no software control of the MCLR pullup.
 2013 Microchip Technology Inc.
MCP19111
19.2.3
ANSELA REGISTER
Analog input functions, such as ADC, are not shown in
the priority lists. These inputs are active when the I/O
pin is set for Analog mode using the ANSELx registers.
Digital output functions may control the pin when it is in
Analog mode with the priority shown in Table 19-1.
The ANSELA register (Register 19-5) is used to
configure the Input mode of an I/O pin to analog.
Setting the appropriate ANSELA bit high will cause all
digital reads on the pin to be read as ‘0’ and allows
analog functions on the pin to operate correctly.
TABLE 19-1:
The state of the ANSELA bits has no effect on the digital output functions. A pin with TRIS clear and ANSEL
set will still operate as a digital output, but the Input
mode will be analog. This can cause unexpected
behavior when executing read-modify-write instructions on the affected port.
Note:
19.2.4
Function Priority(1)
Pin Name
The ANSELA bits default to the Analog
mode after Reset. To use any pins as
digital general purpose or peripheral
inputs, the corresponding ANSEL bits
must be initialized to ‘0’ by user software.
PORTGPA FUNCTIONS AND
OUTPUT PRIORITIES
Each PORTGPA pin is multiplexed with other functions.
The pins, their combined functions and their output
priorities are shown in Table 19-1. For additional
information, refer to the appropriate section in this data
sheet.
PORTGPA pins GPA7 and GPA4 are true open-drain
pins with no connection back to VDD.
GPA0
GPA0
AN0
ANALOG_TEST
ALT_ICSPDAT1
GPA1
GPA1
AN1
CLKPIN
ALT_ICSPCLK1
GPA2
GPA2
AN2
T0CKI
INT
GPA3
GPA3
AN3
GPA4
GPA4 (open drain input/output)
GPA5
GPA5 (open drain data input only)
GPA6
GPA6
ALT_ICSPDAT2
GPA7
GPA7 (open drain output)
SCL
ALT_ICSPCLK2
When multiple outputs are enabled, the actual pin
control goes to the peripheral with the highest priority.
Note 1:
REGISTER 19-2:
PORTGPA OUTPUT PRIORITY
Priority listed from highest to lowest.
PORTGPA: PORTGPA REGISTER
R/W-x
R/W-x
R-x
R-x
R/W-x
R/W-x
R/W-x
R/W-x
GPA7
GPA6
GPA5
GPA4
GPA3
GPA2
GPA1
GPA0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
GPA7: General Purpose Open Drain I/O pin.
bit 6
GPA6: General Purpose I/O pin.
1 = Port pin is > VIH
0 = Port pin is < VIL
bit 5
GPA5/MCLR: General Purpose Open Drain I/O pin.
bit 4
GPA7: General Purpose Open Drain I/O pin.
bit 3-0
GPA<3:0>: General Purpose I/O pin.
1 = Port pin is > VIH
0 = Port pin is < VIL
 2013 Microchip Technology Inc.
x = Bit is unknown
DS22331A-page 111
MCP19111
REGISTER 19-3:
TRISGPA: PORTGPA TRI-STATE REGISTER
R/W-1
R/W-1
R-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
TRISA7
TRISA6
TRISA5
TRISA4
TRISA3
TRISA2
TRISA1
TRISA0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
TRISA<7:6>: PORTGPA Tri-State Control bit
1 = PORTGPA pin configured as an input (tri-stated)
0 = PORTGPA pin configured as an output
bit 5
TRISA5: GPA5 Port Tri-State Control bit
This bit is always ‘1’ as GPA5 is an input only
bit 4-0
TRISA<4:0>: PORTGPA Tri-State Control bit
1 = PORTGPA pin configured as an input (tri-stated)
0 = PORTGPA pin configured as an output
REGISTER 19-4:
x = Bit is unknown
WPUGPA: WEAK PULL-UP PORTGPA REGISTER
U-0
U-0
R/W-1
U-0
R/W-1
R/W-1
R/W-1
R/W-1
—
—
WPUA5
—
WPUA3
WPUA2
WPUA1
WPUA0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5
WPUA5: Weak Pull-up Register bit
1 = Pull-up enabled.
0 = Pull-up disabled.
bit 4
Unimplemented: Read as ‘0’
bit 3-0
WPUA<3:0>: Weak Pull-up Register bit
1 = Pull-up enabled.
0 = Pull-up disabled.
Note 1:
2:
x = Bit is unknown
The weak pull-up device is enabled only when the global RAPU bit is enabled, the pin is in input mode
(TRISGPA = 1), and the individual WPUA bit is enabled (WPUA = 1), and the pin is not configured as an
analog input.
GPA5 weak pull-up is also enabled when the pin is configured as MCLR in Configuration word.
DS22331A-page 112
 2013 Microchip Technology Inc.
MCP19111
REGISTER 19-5:
ANSELA: ANALOG SELECT PORTGPA REGISTER
U-0
U-0
U-0
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
—
—
—
—
ANSA3
ANSA2
ANSA1
ANSA0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
Unimplemented: Read as ‘0’
bit 3-0
ANSA<3:0>: Analog Select PORTGPA Register bit
1 = Analog input. Pin is assigned as analog input.(1)
0 = Digital I/O. Pin is assigned to port or special function.
Note 1:
x = Bit is unknown
Setting a pin to an analog input automatically disables the digital input circuitry, weak pull-ups, and
interrupt-on-change if available. The corresponding TRIS bit must be set to Input mode in order to allow
external control of the voltage on the pin.
TABLE 19-2:
Name
SUMMARY OF REGISTERS ASSOCIATED WITH PORTGPA
Bit 0
Register
on Page
ANSA1
ANSA0
113
—
CLKSEL
110
PS2
PS1
PS0
75
GPA2
GPA1
GPA0
111
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
ANSELA
—
—
—
—
ANSA3
ANSA2
APFCON
—
—
—
—
—
—
OPTION_REG
RAPU
INTEDG
T0CS
T0SE
PSA
PORTGPA
GPA7
GPA6
GPA5
GPA4
GPA3
TRISGPA
TRISA7
TRISA6
TRISA5
TRISA4
TRISA3
TRISA2
TRISA1
TRISA0
112
WPUGPA
—
—
WPUA5
—
WPUA3
WPUA2
WPUA1
WPUA0
112
Legend: — = unimplemented locations read as ‘0’. Shaded cells are not used by PORTGPA.
 2013 Microchip Technology Inc.
DS22331A-page 113
MCP19111
19.3
PORTGPB and TRISGPB
Registers
PORTGPB is an 8-bit wide, bidirectional port consisting
of seven general purpose I/O ports. The corresponding
data direction register is TRISGPB (Register 19-7).
Setting a TRISGPB bit (= 1) will make the corresponding
PORTGPB pin an input (i.e., disable the output driver).
Clearing a TRISGPB bit (= 0) will make the
corresponding PORTGPB pin an output (i.e., enable the
output driver). Example 19-1 shows how to initialize an
I/O port.
Input mode will be analog. This can cause unexpected
behavior when executing read-modify-write instructions
on the affected port.
The TRISGPB register (Register 19-7) controls the
PORTGPB pin output drivers, even when they are being
used as analog inputs. The user should ensure the bits in
the TRISGPB register are maintained set when using
them as analog inputs. I/O pins configured as analog
input always read ‘0’.
Note:
Some pins for PORTGPB are multiplexed with an
alternate function for the peripheral, or a clock function.
In general, when a peripheral or clock function is
enabled, that pin may not be used as a general purpose
I/O pin.
Reading the PORTGPB register (Register 19-6) reads
the status of the pins, whereas writing to it will write to the
PORT latch. All write operations are read-modify-write
operations.
The TRISGPB register (Register 19-7) controls the
PORTGPB pin output drivers, even when they are being
used as analog inputs. The user should ensure the bits in
the TRISGPB register are maintained set when using
them as analog inputs. I/O pins configured as analog
input always read ‘0’. If the pin is configured for a digital
output (either port or alternate function), the TRISGPB bit
must be cleared in order for the pin to drive the signal and
a read will reflect the state of the pin.
19.3.1
INTERRUPT-ON-CHANGE
Each PORTGPA pin is individually configurable as an
interrupt-on-change pin. Control bits IOCB<7:4> and
IOCB<2:0> enable or disable the interrupt function for
each pin. The interrupt-on-change feature is disabled
on a Power-on Reset. Reference Section 20.0
“Interrupt-On-Change” for more information.
19.3.2
WEAK PULL-UPS
Each of the PORTGPB pins has an individually
configurable internal weak pull-up. Control bits
WPUB<7:4> and WPUB<2:1> enable or disable each
pull-up (see Register 19-8). Each weak pull-up is
automatically turned off when the port pin is configured
as an output. All pull-ups are disabled on a Power-on
Reset by the RAPU bit of the OPTION register.
19.3.3
19.3.4
The state of the ANSELB bits has no effect on the digital
output functions. A pin with TRISGPB clear and
ANSELB set will still operate as a digital output, but the
PORTGPB pin GPB0 is a true open drain pin with no
connection back to VDD.
When multiple outputs are enabled, the actual pin
control goes to the peripheral with the highest priority.
Analog input functions, such as ADC, and some digital
input functions are not included in the list below. These
inputs are active when the I/O pin is set for Analog
mode using the ANSELB registers. Digital output
functions may control the pin when it is in Analog mode,
with the priority shown in Table 19-3.
TABLE 19-3:
PORTGPB OUTPUT PRIORITY
Function Priority(1)
Pin Name
GPB0
GPB0 (open drain input/output)
SDA
GPB1
GPB1
AN4
EAPIN
GPB2
GPB2
AN5
GPB4
GPB4
AN6
ICSPDAT
ICDDAT
GPB5
GPB5
AN7
ICSPCLK
ICDCLK
ALT_CLKPIN
GPB6
GPB6
GPB7
Note 1:
DS22331A-page 114
PORTGPB FUNCTIONS AND
OUTPUT PRIORITIES
Each PORTGPB pin is multiplexed with other functions.
The pins, their combined functions and their output
priorities are shown in Table 19-3. For additional
information, refer to the appropriate section in this data
sheet.
ANSELB REGISTER
The ANSELB register (Register 19-9) is used to
configure the Input mode of an I/O pin to analog.
Setting the appropriate ANSELB bit high will cause all
digital reads on the pin to be read as ‘0’ and allows
analog functions on the pin to operate correctly.
The ANSELB bits default to the Analog
mode after Reset. To use any pins as
digital general purpose or peripheral
inputs, the corresponding ANSELB bits
must be initialized to ‘0’ by the user’s
software.
GPB7
Priority listed from highest to lowest.
 2013 Microchip Technology Inc.
MCP19111
REGISTER 19-6:
PORTGPB: PORTGPB REGISTER
R/W-x
R/W-x
R/W-x
R/W-x
U-x
R/W-x
R/W-x
R/W-x
GPB7
GPB6
GPB5
GPB4
—
GPB2
GPB1
GPB0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
GPB<7:4>: General Purpose I/O Pin bit
1 = Port pin is > VIH
0 = Port pin is < VIL
bit 3
Unimplemented: Read as ‘0’
bit 2-0
GPB<2:0>: General Purpose I/O Pin bit
1 = Port pin is > VIH
0 = Port pin is < VIL
REGISTER 19-7:
x = Bit is unknown
TRISGPB: PORTGPB TRI-STATE REGISTER
R/W-1
R/W-1
R/W-1
R/W-1
U-1
R/W-1
R/W-1
R/W-1
TRISB7
TRISB6
TRISB5
TRISB4
—
TRISB2
TRISB1
TRISB0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
TRISB<7:4>: PORTGPB Tri-State Control bit
1 = PORTGPB pin configured as an input (tri-stated)
0 = PORTGPB pin configured as an output
bit 3
Unimplemented: Read as ‘1’
bit 2-0
TRISB<2:0>: PORTGPB Tri-State Control bit
1 = PORTGPB pin configured as an input (tri-stated)
0 = PORTGPB pin configured as an output
 2013 Microchip Technology Inc.
x = Bit is unknown
DS22331A-page 115
MCP19111
REGISTER 19-8:
WPUGPB: WEAK PULL-UP PORTGPB REGISTER
R/W-1
R/W-1
R/W-1
R/W-1
U-0
R/W-1
R/W-1
U-0
WPUB7
WPUB6
WPUB5
WPUB4
—
WPUB2
WPUB1
—
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
WPUB<7:4>: Weak Pull-up Register bit
1 = Pull-up enabled
0 = Pull-up disabled
bit 3
Unimplemented: Read as ‘0’
bit 2-1
WPUB<2:1>: Weak Pull-up Register bit
1 = Pull-up enabled
0 = Pull-up disabled
bit 0
Unimplemented: Read as ‘0’
Note 1:
x = Bit is unknown
The weak pull-up device is enabled only when the global RAPU bit is enabled, the pin is in Input mode
(TRISGPA = 1), the individual WPUB bit is enabled (WPUB = 1), and the pin is not configured as an
analog input.
REGISTER 19-9:
ANSELB: ANALOG SELECT PORTGPB REGISTER
U-0
U-0
R/W-1
R/W-1
U-0
R/W-1
R/W-1
U-0
—
—
ANSB5
ANSB4
—
ANSB2
ANSB1
—
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-4
ANSB<5:4>: Analog Select PORTGPB Register bit
1 = Analog input. Pin is assigned as analog input(1).
0 = Digital I/O. Pin is assigned to port or special function.
bit 3
Unimplemented: Read as ‘0’
bit 2-1
ANSB<2:1>: Analog Select PORTGPB Register bit
1 = Analog input. Pin is assigned as analog input(1).
0 = Digital I/O. Pin is assigned to port or special function.
bit 0
Unimplemented: Read as ‘0’
Note 1:
x = Bit is unknown
Setting a pin to an analog input automatically disables the digital input circuitry, weak pull-ups and
interrupt-on-change if available. The corresponding TRIS bit must be set to Input mode in order to allow
external control of the voltage on the pin.
DS22331A-page 116
 2013 Microchip Technology Inc.
MCP19111
TABLE 19-4:
Name
ANSELB
APFCON
OPTION_REG
SUMMARY OF REGISTERS ASSOCIATED WITH PORTGPB
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
—
—
ANSB5
ANSB4
—
ANSB2
ANSB1
—
116
—
—
—
—
—
—
—
CLKSEL
110
RAPU
INTEDG
T0CS
T0SE
PSA
PS2
PS1
PS0
75
PORTGPB
GPB7
GPB6
GPB5
GPB4
—
GPB2
GPB1
GPB0
115
TRISGPB
TRISB7
TRISB6
TRISB5
TRISB4
—
TRISB2
TRISB1
TRISB0
115
WPUB4
—
WPUB2
WPUB1
—
116
WPUGPB
Legend:
WPUB7
—
WPUB6
WPUB5
= unimplemented locations read as ‘0’. Shaded cells are not used by PORTGPB.
 2013 Microchip Technology Inc.
DS22331A-page 117
MCP19111
NOTES:
DS22331A-page 118
 2013 Microchip Technology Inc.
MCP19111
20.0
INTERRUPT-ON-CHANGE
Each PORTGPA and PORTGPB pin is individually
configurable as an interrupt-on-change pin. Control bits
IOCA and IOCB enable or disable the interrupt function
for each pin. Refer to Register 20-1 and Register 20-2.
The interrupt-on-change is disabled on a Power-on
Reset.
The interrupt-on-change on GPA5 is disabled when
configured as MCLR pin in the Configuration Word.
For enabled interrupt-on-change pins, the values are
compared with the old value latched on the last read of
PORTGPA or PORTGPB. The mismatched outputs of
the last read of all the PORTGPA and PORTGPB pins
are OR’ed together to set the Interrupt-on-Change
Interrupt Flag bit (IOCF) in the INTCON register
(Register 15-1).
20.1
Enabling the Module
20.3
The user, in the Interrupt Service Routine, clears the
interrupt by:
a)
Any read of PORTGPA or PORTGPB AND
Clear flag bit IOCF. This will end the mismatch
condition;
b)
Any write of PORTGPA or PORTGPB AND
Clear flag bit IOCF will end the mismatch
condition;
OR
A mismatch condition will continue to set flag bit IOCF.
Reading PORTGPA or PORTGPB will end the
mismatch condition and allow flag bit IOCF to be
cleared. The latch holding the last read value is not
affected by a MCLR Reset. After this Reset, the IOCF
flag will continue to be set if a mismatch is present.
Note:
To allow individual port pins to generate an interrupt, the
IOCIE bit of the INTCON register must be set. If the
IOCIE bit is disabled, the edge detection on the pin will
still occur, but an interrupt will not be generated.
20.4
20.2
Individual Pin Configuration
To enable a pin to detect an interrupt-on-change, the
associated IOCAx or IOCBx bit of the IOCA or IOCB
register is set.
 2013 Microchip Technology Inc.
Clearing Interrupt Flags
If a change on the I/O pin should occur
when any PORTGPA or PORTGPB
operation is being executed, then the
IOCF interrupt flag may not get set.
Operation in Sleep
The interrupt-on-change interrupt sequence will wake
the device from Sleep mode, if the IOCE bit is set.
DS22331A-page 119
MCP19111
20.5
Interrupt-On-Change Registers
REGISTER 20-1:
IOCA: INTERRUPT-ON-CHANGE PORTGPA REGISTER
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
IOCA7
IOCA6
IOCA5
IOCA4
IOCA3
IOCA2
IOCA1
IOCA0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
IOCA<7:6>: Interrupt-on-Change PORTGPA Register bits.
1 = Interrupt-on-change enabled on the pin.
0 = Interrupt-on-change disabled on the pin.
bit 5
IOCA<5>: Interrupt-on-Change PORTGPA Register bits(1).
1 = Interrupt-on-change enabled on the pin.
0 = Interrupt-on-change disabled on the pin.
bit 4-0
IOCA<4:0>: Interrupt-on-Change PORTGPA Register bits.
1 = Interrupt-on-change enabled on the pin.
0 = Interrupt-on-change disabled on the pin.
Note 1:
x = Bit is unknown
The Interrupt-on-change on GPA5 is disabled if GPA5 is configured as MCLR.
REGISTER 20-2:
IOCB: INTERRUPT-ON-CHANGE PORTGPB REGISTER
R/W-0
R/W-0
R/W-0
R/W-0
U-0
R/W-0
R/W-0
R/W-0
IOCB7
IOCB6
IOCB5
IOCB4
—
IOCB2
IOCB1
IOCB0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-4
IOCB<7:4>: Interrupt-on-Change PORTGPB Register bits.
1 = Interrupt-on-change enabled on the pin.
0 = Interrupt-on-change disabled on the pin.
bit 3
Unimplemented: Read as ‘0’
bit 2-0
IOCB<2:0>: Interrupt-on-Change PORTGPB Register bits.
1 = Interrupt-on-change enabled on the pin.
0 = Interrupt-on-change disabled on the pin.
TABLE 20-1:
Name
x = Bit is unknown
SUMMARY OF REGISTERS ASSOCIATED WITH INTERRUPT-ON-CHANGE
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
—
—
—
—
ANSA3
ANSA2
ANSA1
ANSA0
113
116
ANSELA
ANSELB
—
—
ANSB5
ANSB4
—
ANSB2
ANSB1
—
INTCON
GIE
PEIE
T0IE
INTE
IOCE
T0IF
INTF
IOCF
94
IOCA
IOCA7
IOCA6
IOCA5
IOCA4
IOCA3
IOCA2
IOCA1
IOCA0
120
IOCB
IOCB7
IOCB6
IOCB5
IOCB4
—
IOCB2
IOCB1
IOCB0
120
TRISGPA
TRISA7
TRISA6
TRISA5
TRISA4
TRISA3
TRISA2
TRISA1
TRISA0
112
TRISB7
TRISB6
TRISB5
TRISB4
—
TRISB2
TRISB1
TRISB0
115
TRISGPB
Legend:
— = unimplemented locations read as ‘0’. Shaded cells are not used by interrupt-on-change.
DS22331A-page 120
 2013 Microchip Technology Inc.
MCP19111
21.0
INTERNAL TEMPERATURE
INDICATOR MODULE
The MCP19111 is equipped with a temperature circuit
designed to measure the operating temperature of the
silicon die. The circuit's range of the operating
temperature falls between -40°C and +125°C. The
output is a voltage that is proportional to the device
temperature. The output of the temperature indicator is
internally connected to the device ADC.
21.2
Temperature Output
The output of the circuit is measured using the internal
analog-to-digital converter. Channel 10 is reserved for
the temperature circuit output. Refer to Section 22.0
“Analog-to-Digital Converter (ADC) Module” for
detailed information.
The temperature of the silicon die can be calculated by
the ADC measurement by using Equation 21-1.
EQUATION 21-1:
21.1
Circuit Operation
The TMPSEN bit in the ABECON register,
Register 6-15, is set to enable the internal temperature
measurement circuit. The MCP19111 overtemperature
shutdown feature is NOT controlled by this bit.
FIGURE 21-1:
SILICON DIE
TEMPERATURE
ADC READING – 1.75
TEMP_DIE = ----------------------------------------------------------13.3mV/  C
TEMPERATURE CIRCUIT
DIAGRAM
VDD
TSEN
TSRNG
VOUT
ADC
MUX
ADC
n
CHS bits
(ADCON0 register)
 2013 Microchip Technology Inc.
DS22331A-page 121
MCP19111
NOTES:
DS22331A-page 122
 2013 Microchip Technology Inc.
MCP19111
22.0
ANALOG-TO-DIGITAL
CONVERTER (ADC) MODULE
The internal band gap supplies the voltage reference to
the ADC.
The ADC can generate an interrupt upon completion of
a conversion. This interrupt can be used to wake-up the
device from Sleep.
The Analog-to-Digital Converter (ADC) allows
conversion of an analog input signal to a 10-bit binary
representation of that signal. This device uses analog
inputs, which are multiplexed into a single sample and
hold circuit. The output of the sample and hold is
connected to the input of the converter. The converter
generates a 10-bit binary result via successive
approximation and stores the right justified conversion
result into the ADC result registers (ADRESH:ADRESL
register pair). Figure 22-1 shows the block diagram of
the ADC.
FIGURE 22-1:
ADC BLOCK DIAGRAM
VIN_ANA
00000
VREF
00001
OVREF
00010
UVREF
00011
VBGR
00100
VOUT
00101
CRT
00110
VZC
00111
DEMAND
01000
RELEFF
01001
TEMP_ANA
01010
ANA_IN
01011
DCI
01100
GPA0
10000
GPA1
10001
GPA2
10010
GPA3
10011
GPB1
10100
GPB2
10101
GPB4
10110
GPB5
10111
VREF
ADC
GO/DONE
10
ADON
ADRESH
ADRESL
VSS
CHS4:CHS0
Note 1: When ADON = 0, all multiplexer inputs are disconnected.
2: See ADCON0 register (Register 22-1) for detailed analog channel selection per device.
 2013 Microchip Technology Inc.
DS22331A-page 123
MCP19111
22.1
ADC Configuration
When configuring and using the ADC, the following
functions must be considered:
•
•
•
•
•
Port configuration
Channel selection
ADC conversion clock source
Interrupt control
Result formatting
22.1.1
PORT CONFIGURATION
The ADC can be used to convert both analog and
digital signals. When converting analog signals, the I/O
pin should be configured for analog by setting the
associated TRIS and ANSEL bits. Refer to
Section 19.0 “I/O Ports” for more information.
Note:
22.1.2
Analog voltages on any pin that is defined
as a digital input may cause the input
buffer to conduct excess current.
CHANNEL SELECTION
22.1.3
ADC CONVERSION CLOCK
The source of the conversion clock is software
selectable via the ADCS bits of the ADCON1 register.
There are five possible clock options:
•
•
•
•
•
FOSC/8
FOSC/16
FOSC/32
FOSC/64
FRC (clock derived from internal oscillator with a
divisor of 16)
The time to complete one bit conversion is defined as
TAD. One full 10-bit conversion requires 11 TAD periods
as shown in Figure 22-2.
For a correct conversion, the appropriate TAD
specification must be met. Refer to the A/D conversion
requirements in Section 5.0 “Digital Electrical
Characteristics” for more information. Table 22-1
gives examples of appropriate ADC clock selections.
Note:
There are up to 21 channel selections available:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
AN<6:0> pins
VIN: 1/5 of the input voltage (VIN)
VREGREF: VOUT reference voltage
OV_REF: reference for OV comparator
UV_REF: reference for UV comparator
VBGR: band gap reference
VOUT: output voltage
CRT: voltage proportional to the AC inductor
current
VZC: an internal ground, Voltage for Zero Current
DEMAND: input to slope compensation circuitry
RELEFF: relative efficient measurement channel
TMP_ANA: voltage proportional to silicon die temperature
ANA_IN: for a multi-phase slave, error amplifier
signal received from master
DCI: DC inductor valley current
The CHS<4:0> bits of the ADCON0 register determine
which channel is connected to the sample and hold
circuit.
When changing channels, a delay is required before
starting the next conversion. Refer to Section 22.2
“ADC Operation” for more information.
DS22331A-page 124
Unless using the FRC, any changes in the
system clock frequency will change the
ADC clock frequency, which may
adversely affect the ADC result.
TABLE 22-1:
ADC CLOCK PERIOD (TAD) VS.
DEVICE OPERATING
FREQUENCIES
ADC Clock Period (TAD)
Device
Frequency
(FOSC)
ADC
Clock Source
ADCS<2:0>
8 MHz
FOSC/8
001
1.0 µs(2)
FOSC/16
101
2.0 µs
FOSC/32
010
4.0 µs
FOSC/64
110
8.0 µs(3)
FRC
x11
2.0 – 6.0 µs(1,4)
Legend: Shaded cells are outside of recommended
range.
Note 1: The FRC source has a typical TAD time of
4 µs for VDD > 3.0V.
2: These values violate the minimum
required TAD time.
3: For faster conversion times, the selection
of another clock source is recommended.
4: The FRC clock source is only
recommended if the conversion will be
preformed during Sleep.
 2013 Microchip Technology Inc.
MCP19111
FIGURE 22-2:
ANALOG-TO-DIGITAL CONVERSION TAD CYCLES
TCY - TAD TAD1 TAD2 TAD3 TAD4 TAD5 TAD6 TAD7 TAD8 TAD9 TAD10 TAD11
b9
b8
b7
b6
b5
b4
b3
b1
b2
b0
Conversion starts
Holding capacitor is disconnected from analog input (typically 100 ns)
Set GO/DONE bit
On the following cycle:
ADRESH:ADRESL is loaded, GO bit is cleared,
ADIF bit is set, holding capacitor is connected to analog input.
22.1.4
INTERRUPTS
This interrupt can be generated while the device is
operating, or while in Sleep. If the device is in Sleep,
the interrupt will wake-up the device. Upon waking from
Sleep, the next instruction following the SLEEP
instruction is always executed. If the user is attempting
to wake-up from Sleep and resume in-line code
execution, the GIE and PEIE bits of the INTCON
register must be disabled. If the GIE and PEIE bits of
the INTCON register are enabled, execution will switch
to the Interrupt Service Routine.
The ADC module allows for the ability to generate an
interrupt upon completion of an Analog-to-Digital
conversion. The ADC Interrupt Flag is the ADIF bit in
the PIR1 register. The ADC Interrupt Enable is the
ADIE bit in the PIE1 register. The ADIF bit must be
cleared in software.
Note 1: The ADIF bit is set at the completion of
every conversion, regardless of whether
or not the ADC interrupt is enabled.
22.1.5
2: The ADC operates during Sleep-only
when the FRC oscillator is selected.
RESULT FORMATTING
The 10-bit A/D conversion result is supplied in right justified format only.
Figure 22-3 shows the output format.
FIGURE 22-3:
10-BIT A/D RESULT FORMAT
(ADFM = 1)
MSB
bit 7
Read as ‘0’
 2013 Microchip Technology Inc.
LSB
bit 0
bit 7
bit 0
10-bit A/D Result
DS22331A-page 125
MCP19111
22.2
22.2.1
ADC Operation
STARTING A CONVERSION
To enable the ADC module, the ADON bit of the
ADCON0 register must be set to a ‘1’. Setting the
GO/DONE bit of the ADCON0 register to a ‘1’ will start
the Analog-to-Digital conversion.
Note:
22.2.2
The GO/DONE bit should not be set in the
same instruction that turns on the ADC.
Refer
to
Section 22.2.5
“A/D
Conversion Procedure”.
COMPLETION OF A CONVERSION
When the conversion is complete, the ADC module will:
• Clear the GO/DONE bit
• Set the ADIF Interrupt Flag bit
• Update the ADRESH:ADRESL registers with new
conversion result
22.2.3
TERMINATING A CONVERSION
If a conversion must be terminated before completion,
the GO/DONE bit can be cleared in software. The
ADRESH:ADRESL registers will not be updated with
the partially complete Analog-to-Digital conversion
sample. Instead, the ADRESH:ADRESL register pair
will retain the value of the previous conversion.
Additionally, a two TAD delay is required before another
acquisition can be initiated. Following the delay, an
input acquisition is automatically started on the
selected channel.
Note:
22.2.4
A device Reset forces all registers to their
Reset state. Thus, the ADC module is
turned off and any pending conversion is
terminated.
ADC OPERATION DURING SLEEP
The ADC module can operate during Sleep. This
requires the ADC clock source to be set to the FRC
option. When the FRC clock source is selected, the
ADC waits one additional instruction before starting the
conversion. This allows the SLEEP instruction to be
executed, which can reduce system noise during the
conversion. If the ADC interrupt is enabled, the device
will wake-up from Sleep when the conversion
completes. If the ADC interrupt is disabled, the ADC
module is turned off after the conversion completes,
although the ADON bit remains set.
When the ADC clock source is something other than
FRC, a SLEEP instruction causes the present
conversion to be aborted and the ADC module is
turned off, although the ADON bit remains set.
DS22331A-page 126
22.2.5
A/D CONVERSION PROCEDURE
This is an example procedure for using the ADC to
perform an Analog-to-Digital conversion:
1.
2.
3.
4.
5.
6.
7.
8.
Configure Port:
• Disable pin output driver (Refer to the TRIS
register)
• Configure pin as analog (Refer to the ANSEL
register)
Configure the ADC module:
• Select ADC conversion clock
• Select ADC input channel
• Turn on ADC module
Configure ADC interrupt (optional):
• Clear ADC interrupt flag
• Enable ADC interrupt
• Enable peripheral interrupt
• Enable global interrupt(1)
Wait the required acquisition time(2).
Start conversion by setting the GO/DONE bit.
Wait for ADC conversion to complete by one of
the following:
• Polling the GO/DONE bit
• Waiting for the ADC interrupt (interrupts
enabled)
Read ADC Result.
Clear the ADC interrupt flag (required if interrupt
is enabled).
Note 1: The global interrupt can be disabled if the
user is attempting to wake-up from Sleep
and resume in-line code execution.
2: Refer to Section 22.4 “A/D Acquisition
Requirements”.
EXAMPLE 22-1:
A/D CONVERSION
;This code block configures the ADC
;for polling, Frc clock and AN0 input.
;
;Conversion start & polling for completion ;
are included.
;
BANKSEL
ADCON1
;
MOVLW
B’01110000’
;Frc clock
MOVWF
ADCON1
;
BANKSEL
TRISGPA
;
BSF
TRISGPA,0
;Set GPA0 to input
BANKSEL
ANSELA
;
BSF
ANSELA,0
;Set GPA0 to analog
BANKSEL
ADCON0
;
MOVLW
B’01000001’
;Select channel AN0
MOVWF
ADCON0
;Turn ADC On
CALL
SampleTime
;Acquisiton delay
BSF
ADCON0,1
;Start conversion
BTFSC
ADCON0,1
;Is conversion done?
GOTO
$-1
;No, test again
BANKSEL
ADRESH
;
MOVF
ADRESH,W
;Read upper 2 bits
MOVWF
RESULTHI
;store in GPR space
BANKSEL
ADRESL
;
MOVF
ADRESL,W
;Read lower 8 bits
MOVWF
RESULTLO
;Store in GPR space
 2013 Microchip Technology Inc.
MCP19111
22.3
ADC Register Definitions
The following registers are used to control the
operation of the ADC:
REGISTER 22-1:
ADCON0: A/D CONTROL REGISTER 0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
CHS4
CHS3
CHS2
CHS1
CHS0
GO/DONE
ADON
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
Unimplemented: Read as ‘0’
bit 6-2
CHS<4:0>: Analog Channel Select bits
00000 = VIN_ANA (analog voltage proportional to VIN)
00001 = VREGREF (reference voltage for VREG output)
00010 = OV_REF (reference for overvoltage comparator)
00011 = UV_REF (reference for undervoltage comparator)
00100 = VBGR (band gap reference)
00101 = INT_VREG (internal version of the VREG load voltage)
00110 = CRT (voltage proportional to the current in the inductor)
00111 = VZC (an internal ground, Voltage for Zero Current)
01000 = DEMAND (input to current loop, output of demand mux)
01001 = RELEFF (analog voltage proportional to duty cycle)
01010 = TMP_ANA (analog voltage proportional to temperature)
01011 = ANA_IN (demanded current from the remote master)
01100 = DCI (dc inductor valley current)
01101 = Unimplemented
01110 = Unimplemented
01111 = Unimplemented
10000 = GPA0 (i.e. ADDR1)
10001 = GPA1 (i.e. ADDR0)
10010 = GPA2 (i.e. Temperature Sensor Input)
10011 = GPA3 (i.e. Tracking Voltage)
10100 = GPB1
10101 = GPB2
10110 = GPB4
10111 = GPB5
11000 = Unimplemented
11001 = Unimplemented
11011 = Unimplemented
11100 = Unimplemented
11101 = Unimplemented
11110 = Unimplemented
11111 = Unimplemented
bit 1
GO/DONE: A/D Conversion Status bit
1 = A/D conversion cycle in progress. Setting this bit starts an A/D conversion cycle.
This bit is automatically cleared by hardware when the A/D conversion has completed.
0 = A/D conversion completed/not in progress
bit 0
ADON: ADC Enable bit
1 = ADC is enabled
0 = ADC is disabled and consumes no operating current
 2013 Microchip Technology Inc.
DS22331A-page 127
MCP19111
REGISTER 22-2:
ADCON1: A/D CONTROL REGISTER 1
U-0
R/W-0
R/W-0
R/W-0
U-0
U-0
U-0
U-0
—
ADCS2
ADCS1
ADCS0
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
Unimplemented: Read as ‘0’
bit 6-4
ADCS<2:0>: A/D Conversion Clock Select bits
000 = Reserved
001 = FOSC/8
010 = FOSC/32
x11 = FRC (clock derived from internal oscillator with a divisor of 16)
100 = Reserved
101 = FOSC/16
110 = FOSC/64
bit 3-0
Unimplemented: Read as ‘0’
REGISTER 22-3:
ADRESH: ADC RESULT REGISTER HIGH (ADRESH)
U-0
U-0
U-0
U-0
U-0
U-0
R-x
R-x
—
—
—
—
—
—
ADRES9
ADRES8
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-2
Unimplemented: Read as ‘0’
bit 1-0
ADRES<9:8>: Most Significant A/D Results
REGISTER 22-4:
x = Bit is unknown
ADRESL: ADC RESULT REGISTER LOW (ADRESL)
R-x
R-x
R-x
R-x
R-x
R-x
R-x
R-x
ADRES7
ADRES6
ADRES5
ADRES4
ADRES3
ADRES2
ADRES1
ADRES0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
x = Bit is unknown
ADRES<7:0>: Least Significant A/D results
DS22331A-page 128
 2013 Microchip Technology Inc.
MCP19111
22.4
A/D Acquisition Requirements
For the ADC to meet its specified accuracy, the charge
holding capacitor (CHOLD) must be allowed to fully
charge to the input channel voltage level. The Analog
Input model is shown in Figure 22-4. The source
impedance (RS) and the internal sampling switch (RSS)
impedance directly affect the time required to charge
the capacitor CHOLD. The sampling switch (RSS)
impedance varies over the device voltage (VDD), refer
to Figure 22-4.
EQUATION 22-1:
The maximum recommended impedance for
analog sources is 10 k. As the source impedance is
decreased, the acquisition time may be decreased.
After the analog input channel is selected (or changed),
an A/D acquisition must be done before the conversion
can be started. To calculate the minimum acquisition
time, Equation 22-1 may be used. This equation
assumes that 1/2 LSb error is used (1,024 steps for the
ADC). The 1/2 LSb error is the maximum error allowed
for the ADC to meet its specified resolution.
ACQUISITION TIME EXAMPLE
Assumptions: Temperature = +50°C and external impedance of 10 k  5.0V V
DD
T ACQ = Amplifier Settling Time + Hold Capacitor Charging Time + Temperature Coefficient
= T AMP + T C + T COFF
= 2 µs + T C +   Temperature - 25°C   0.05 µs/°C  
The value for TC can be approximated with the following equations:
V


1
1 – ------------------------------ = V
APPLIED 
CHOLD
n+1
2
 – 1
–T C

----------

RC 
VAPPLIED  1 – e
 = VCHOLD




–T C

----------



RC 
1
VAPPLIED  1 – e
 = VAPPLIED  1 – ------------------------------
n+1



2
 – 1


;[1] VCHOLD charged to within 1/2 lsb
;[2] VCHOLD charge response to VAPPLIED
;combining [1] and [2]
Note: Where n = number of bits of the ADC.
Solving for TC:
T C = – C HOLD  R IC + R SS + R S  ln(1/2047)
= – 10 pF  1 k  + 7 k  + 10 k   ln(0.0004885)
= 1.37 µs
Therefore:
T ACQ = 2 µs + 1.37µs +   50°C- 25°C   0.05µs/°C  
= 4.67 µs
Note 1: The charge holding capacitor (CHOLD) is not discharged after each conversion.
2: The maximum recommended impedance for analog sources is 10 k. This is required to meet the pin
leakage specification.
 2013 Microchip Technology Inc.
DS22331A-page 129
MCP19111
FIGURE 22-4:
ANALOG INPUT MODEL
RS
VA
VDD
Analog
Input
pin
CPIN
5 pF
Sampling
Switch
VT  0.6V
RIC  1k
VT  0.6V
ILEAKAGE(1)
SS RSS
CHOLD = 10 pF
VSS/VREF-
6V
5V
VDD 4V
3V
2V
Legend:
CHOLD = Sample/Hold Capacitance
CPIN = Input Capacitance
RSS
ILEAKAGE = Leakage current at the pin due to various junctions
5 6 7 8 91011
Sampling Switch
(k)
RIC = Interconnect Resistance
RSS = Resistance of Sampling Switch
SS = Sampling Switch
VT = Threshold Voltage
Note 1: Refer to Section 5.0 “Digital Electrical Characteristics”.
FIGURE 22-5:
ADC TRANSFER FUNCTION
Full-Scale Range
3FFh
3FEh
3FDh
ADC Output Code
3FCh
3FBh
03h
02h
01h
00h
Analog Input Voltage
0.5 LSB
VREF-
DS22331A-page 130
Zero-Scale
Transition
1.5 LSB
Full-Scale
Transition
VREF+
 2013 Microchip Technology Inc.
MCP19111
TABLE 22-2:
Name
SUMMARY OF REGISTERS ASSOCIATED WITH ADC
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
ADCON0
—
CHS4
CHS3
CHS2
CHS1
CHS0
GO/DONE
ADON
127
ADCON1
—
ADCS2
ADCS1
ADCS0
—
—
—
—
128
ADRESH
—
—
—
—
—
—
ADRES9
ADRES8
128
ADRESL
ADRES7
ADRES6
ADRES5
ADRES4
ADRES3
ADRES2
ADRES1
ADRES0
128
ANSELA
—
—
—
—
ANSA3
ANSA2
ANSA1
ANSA0
113
ANSELB
—
—
ANSB5
ANSB4
—
ANSB2
ANSB1
—
116
INTCON
GIE
PEIE
T0IE
INTE
IOCE
T0IF
INTF
IOCF
93
—
ADIE
BCLIE
SSPIE
—
—
TMR2IE
TMR1IE
94
PIE1
PIR1
—
ADIF
BCLIF
SSPIF
—
—
TMR2IF
TMR1IF
96
TRISGPA
TRISA7
TRISA6
TRISA5
TRISA4
TRISA3
TRISA2
TRISA1
TRISA0
112
TRISGPB
TRISB7
TRISB6
TRISB5
TRISB4
—
TRISB2
TRISB1
TRISB0
115
Legend: — = unimplemented read as ‘0’. Shaded cells are not used for ADC module.
 2013 Microchip Technology Inc.
DS22331A-page 131
MCP19111
NOTES:
DS22331A-page 132
 2013 Microchip Technology Inc.
MCP19111
23.0
TIMER0 MODULE
The Timer0 module is an 8-bit timer/counter with the
following features:
•
•
•
•
•
8-bit timer/counter register (TMR0)
8-bit prescaler (independent of Watchdog Timer)
Programmable internal or external clock source
Programmable external clock edge selection
Interrupt on overflow
Figure 23-1 is a block diagram of the Timer0 module.
FIGURE 23-1:
BLOCK DIAGRAM OF THE TIMER0
FOSC/4
Data Bus
0
8
T0CKI
1
Sync
2 TCY
1
TMR0
0
TMR0SE TMR0CS
8-bit
Prescaler
PSA
Set Flag bit TMR0IF
on Overflow
Overflow to Timer1
8
PS<2:0>
23.1
Timer0 Operation
The Timer0 module can be used as either an 8-bit timer
or an 8-bit counter.
23.1.1
8-BIT TIMER MODE
The Timer0 module will increment every instruction
cycle, if used without a prescaler. 8-Bit Timer mode is
selected by clearing the T0CS bit of the OPTION_REG
register.
When TMR0 is written, the increment is inhibited for
two instruction cycles immediately following the write.
Note:
23.1.2
The value written to the TMR0 register
can be adjusted, in order to account for
the two instruction cycle delay when
TMR0 is written.
23.1.3
SOFTWARE PROGRAMMABLE
PRESCALER
A single software programmable prescaler is available
for use with either Timer0 or the Watchdog Timer
(WDT), but not both simultaneously. The prescaler
assignment is controlled by the PSA bit of the
OPTION_REG register. To assign the prescaler to
Timer0, the PSA bit must be cleared to ‘0’.
There are 8 prescaler options for the Timer0 module
ranging from 1:2 to 1:256. The prescale values are
selectable via the PS<2:0> bits of the OPTION_REG
register. In order to have a 1:1 prescaler value for the
Timer0 module, the prescaler must be disabled by
setting the PSA bit of the OPTION_REG register.
The prescaler is not readable or writable. When
assigned to the Timer0 module, all instructions writing to
the TMR0 register will clear the prescaler.
8-BIT COUNTER MODE
In 8-Bit Counter mode, the Timer0 module will increment
on every rising or falling edge of the T0CKI pin. The
incrementing edge is determined by the T0SE bit of the
OPTION_REG register.
8-Bit Counter mode using the T0CKI pin is selected by
setting the T0CS bit in the OPTION_REG register to ‘1’.
 2013 Microchip Technology Inc.
DS22331A-page 133
MCP19111
23.1.4
23.1.5
SWITCHING PRESCALER
BETWEEN TIMER0 AND WDT
MODULES
As a result of having the prescaler assigned to either
Timer0 or the WDT, it is possible to generate an
unintended device Reset when switching prescaler
values. When changing the prescaler assignment from
Timer0 to the WDT module, the instruction sequence
shown in Example 23-1 must be executed.
Timer0 will generate an interrupt when the TMR0
register overflows from FFh to 00h. The T0IF interrupt
flag bit of the INTCON register is set every time the
TMR0 register overflows, regardless of whether or not
the Timer0 interrupt is enabled. The T0IF bit can only
be cleared in software. The Timer0 interrupt enable is
the T0IE bit of the INTCON register.
Note:
EXAMPLE 23-1:
CHANGING PRESCALER
(TIMER0  WDT)
BANKSEL TMR0
CLRWDT
CLRF
TMR0
;
;Clear WDT
;Clear TMR0 and
;prescaler
BANKSEL OPTION_REG
;
BSF
OPTION_REG,PSA ;Select WDT
CLRWDT
;
;
MOVLW
b’11111000’
;Mask prescaler
ANDWF
OPTION_REG,W
;bits
IORLW
b’00000101’
;Set WDT prescaler
MOVWF
OPTION_REG
;to 1:32
23.1.6
The Timer0 interrupt cannot wake the
processor from Sleep since the timer is
frozen during Sleep.
USING TIMER0 WITH AN
EXTERNAL CLOCK
When Timer0 is in Counter mode, the synchronization
of the T0CKI input and the Timer0 register is
accomplished by sampling the prescaler output on the
Q2 and Q4 cycles of the internal phase clocks.
Therefore, the high and low periods of the external
clock source must meet the timing requirements as
shown
in
Section 5.0
“Digital
Electrical
Characteristics”.
When changing the prescaler assignment from the
WDT to the Timer0 module, the following instruction
sequence must be executed (see Example 23-2).
EXAMPLE 23-2:
TIMER0 INTERRUPT
23.1.7
OPERATION DURING SLEEP
Timer0 cannot operate while the processor is in Sleep
mode. The contents of the TMR0 register will remain
unchanged while the processor is in Sleep mode.
CHANGING PRESCALER
(WDT  TIMER0)
CLRWDT
;Clear WDT and
;prescaler
BANKSEL OPTION_REG
;
MOVLW
b’11110000’ ;Mask TMR0 select and
ANDWF
OPTION_REG,W ;prescaler bits
IORLW
b’00000011’ ;Set prescale to 1:16
MOVWF
OPTION_REG
;
TABLE 23-1:
SUMMARY OF REGISTERS ASSOCIATED WITH TIMER0
Name
INTCON
OPTION_REG
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
GIE
PEIE
T0IE
INTE
IOCIE
T0IF
INTF
IOCIF
94
RAUP
INTEDG
T0CS
T0SE
PSA
PS2
PS1
PS0
TMR0
TRISGPA
Timer0 Module Register
TRISA7
TRISA6
TRISA5
TRISA4
TRISA3
75
133*
TRISA2
TRISA1
TRISA0
112
Legend: — = Unimplemented locations, read as ‘0’. Shaded cells are not used by the Timer0 module.
* Page provides register information.
DS22331A-page 134
 2013 Microchip Technology Inc.
MCP19111
24.0
TIMER1 MODULE WITH GATE
CONTROL
The Timer1 module is a 16-bit timer with the following
features:
•
•
•
•
•
16-bit timer register pair (TMR1H:TMR1L)
Readable and Writable (both registers)
Selectable internal clock source
2-bit prescaler
Interrupt on overflow
Figure 24-1 is a block diagram of the Timer1 module.
FIGURE 24-1:
TIMER1 BLOCK DIAGRAM
TMR1ON
Set flag bit
TMR1IF on
Overflow
TMR1(1)
TMR1H
TMR1L
FOSC
1
Prescaler
1, 2, 4, 8
0
FOSC/4
2
T1CKPS<1:0>
Note 1: TMR1 register increments on rising edge.
24.1
Timer1 Operation
The Timer1 module is a 16-bit incrementing timer which
is accessed through the TMR1H:TMR1L register pair.
Writes to TMR1H or TMR1L directly update the
counter. The timer is incremented on every instruction
cycle.
Timer1 is enabled by configuring the TMR1ON bit in the
T1CON register. Table 24-1 displays the Timer1 enable
selections.
24.2
Clock Source Selection
The TMR1CS bit of the T1CON register is used to select
the clock source for Timer1. Table 24-1 displays the
clock source selections.
 2013 Microchip Technology Inc.
TMR1CS
24.2.1
INTERNAL CLOCK SOURCE
The TMR1H:TMR1L register pair will increment on
multiples of FOSC or FOSC/4 as determined by the
Timer1 prescaler.
As an example, when the FOSC internal clock source is
selected, the Timer1 register value will increment by four
counts every instruction clock cycle.
TABLE 24-1:
TMR1CS
CLOCK SOURCE
SELECTIONS
Clock Source
1
8 MHz system Clock (FOSC)
0
2 MHz instruction clock (FOSC/4)
DS22331A-page 135
MCP19111
24.3
Timer1 Prescaler
24.5
Timer1 has four prescaler options allowing 1, 2, 4 or 8
divisions of the clock input. The T1CKPS bits of the
T1CON register control the prescale counter. The
prescale counter is not directly readable or writable;
however, the prescaler counter is cleared upon a write to
TMR1H or TMR1L.
Unlike other standard mid-range Timer1 modules, the
MCP19111 Timer1 module only clocks from an internal
system clock, and thus does not run during Sleep
mode, nor can be used to wake the device from this
mode.
24.6
24.4
Timer1 Interrupt
The Timer1 register pair (TMR1H:TMR1L) increments
to FFFFh and rolls over to 0000h. When Timer1 rolls
over, the Timer1 interrupt flag bit of the PIR1 register is
set. To enable the interrupt on rollover, you must set
these bits:
•
•
•
•
Timer1 in Sleep
Timer1 Control Register
The Timer1 Control register (T1CON), shown in
Register 24-1, is used to control Timer1 and select the
various features of the Timer1 module.
TMR1ON bit of the T1CON register
TMR1IE bit of the PIE1 register
PEIE bit of the INTCON register
GIE bit of the INTCON register
The interrupt is cleared by clearing the TMR1IF bit in
the Interrupt Service Routine.
Note:
The TMR1H:TMR1L register pair and the
TMR1IF bit should be cleared before
enabling interrupts.
REGISTER 24-1:
T1CON: TIMER1 CONTROL REGISTER
U-0
U-0
R/W-0
R/W-0
U-0
U-0
R/W-0/
R/W-0
—
—
T1CKPS1
T1CKPS0
—
—
TMR1CS
TMR1ON
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-4
T1CKPS<1:0>: Timer1 Input Clock Prescale Select bits
11 = 1:8 Prescale value
10 = 1:4 Prescale value
01 = 1:2 Prescale value
00 = 1:1 Prescale value
bit 3-2
Unimplemented: Read as ‘0’
bit 1
TMR1CS: Timer1 Clock Source Control bit
1 = 8 MHz system clock (FOSC)
0 = 2 MHz instruction clock (FOSC)
bit 0
TMR1ON: Timer1 On bit
1 = Enables Timer1
0 = Stops Timer1
Clears Timer1 gate flip-flop
DS22331A-page 136
x = Bit is unknown
 2013 Microchip Technology Inc.
MCP19111
TABLE 24-2:
SUMMARY OF REGISTERS ASSOCIATED WITH TIMER1
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
INTCON
GIE
PEIE
T0IE
INTE
IOCE
T0IF
INTF
IOCF
93
PIE1
—
ADIE
BCLIE
SSPIE
—
—
TMR2IE
TMR1IE
94
PIR1
—
ADIF
BCLIF
SSPIF
—
—
TMR2IF
TMR1IF
96
TMR1H
Holding Register for the Most Significant Byte of the 16-bit TMR1 Register
135*
TMR1L
Holding Register for the Least Significant Byte of the 16-bit TMR1 Register
135*
T1CON
—
—
T1CKPS1 T1CKPS0
—
—
TMR1CS TMR1ON
136
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by the Timer1 module.
* Page provides register information.
 2013 Microchip Technology Inc.
DS22331A-page 137
MCP19111
25.0
TIMER2 MODULE
The Timer2 module is an 8-bit timer with the following
features:
•
•
•
•
8-bit timer register (TMR2)
8-bit period register (PR2)
Interrupt on TMR2 match with PR2
Software programmable prescaler (1:1, 1:4, 1:16)
See Figure 25-1 for a block diagram of Timer2.
25.1
The TMR2 and PR2 registers are both fully readable
and writable. On any Reset, the TMR2 register is set to
00h and the PR2 register is set to FFh.
Timer2 is turned on by setting the TMR2ON bit in the
T2CON register to a ‘1’. Timer2 is turned off by clearing
the TMR2ON bit to a ‘0’.
The Timer2 prescaler is controlled by the T2CKPS bits
in the T2CON register. The prescaler counter are
cleared when:
Timer2 Operation
The clock input to the Timer2 module is the system
clock (FOSC). The clock is fed into the Timer2 prescaler,
which has prescale options of 1:1, 1:4 or 1:16. The
output of the prescaler is then used to increment the
TMR2 register.
The values of TMR2 and PR2 are constantly compared
to determine when they match. TMR2 will increment
from 00h until it matches the value in PR2. When a
match occurs, TMR2 is reset to 00h on the next
increment cycle.
FIGURE 25-1:
The match output of the Timer2/PR2 comparator is
used to set the TMR2IF interrupt flag bit in the PIR1
register.
• A write to TMR2 occurs.
• A write to T2CON occurs.
• Any device Reset occurs (Power-on Reset, MCLR
Reset, Watchdog Timer Reset, or Brown-out
Reset).
Note:
TMR2 is not cleared when T2CON is
written.
TIMER2 BLOCK DIAGRAM
TMR2
Output
FOSC
Prescaler
1:1, 1:4, 1:8, 1:16
2
TMR2
Sets Flag
bit TMR2IF
Reset
Comparator
EQ
T2CKPS<1:0>
PR2
DS22331A-page 138
 2013 Microchip Technology Inc.
MCP19111
25.2
Timer2 Control Register
REGISTER 25-1:
T2CON: TIMER2 CONTROL REGISTER
U-0
U-0
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
—
—
—
—
—
TMR2ON
T2CKPS1
T2CKPS0
bit 7
bit 0
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-3
Unimplemented: Read as ‘0’
bit 2
TMR2ON: Timer2 On bit
1 = Timer2 is on
0 = Timer2 is off
bit 1-0
T2CKPS<1:0>: Timer2 Clock Prescale Select bits
00 =Prescaler is 1
01 =Prescaler is 4
10 =Prescaler is 8
11 =Prescaler is 16
TABLE 25-1:
x = Bit is unknown
SUMMARY OF REGISTERS ASSOCIATED WITH TIMER2
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
INTCON
GIE
PEIE
T0IE
INTE
IOCE
T0IF
INTF
IOCF
93
PIE1
—
ADIE
BCLIE
SSPIE
—
—
TMR2IE
TMR1IE
94
PIR1
—
ADIF
BCLIF
SSPIF
—
—
TMR2IF
TMR1IF
96
—
—
—
PR2
T2CON
Timer2 Module Period Register
TMR2
—
—
138*
TMR2ON T2CKPS1 T2CKPS0
Holding Register for the 8-bit TMR2 Time Base
139
138*
Legend: — = unimplemented read as ‘0’. Shaded cells are not used for Timer2 module.
* Page provides register information.
 2013 Microchip Technology Inc.
DS22331A-page 139
MCP19111
NOTES:
DS22331A-page 140
 2013 Microchip Technology Inc.
MCP19111
26.0
PWM MODULE
The CCP module implemented on the MCP19111 is a
modified version of the CCP module found in standard
mid-range microcontrollers. In the MCP19111, the
PWM module is used to generate the system clock or
system oscillator. This system clock will control the
MCP19111 switching frequency, as well as set the
maximum allowable duty cycle. The PWM module
does not continuously adjust the duty cycle to control
the output voltage. This is accomplished by the analog
control loop and associated circuitry.
26.1
Standard Pulse-Width Modulation
(PWM) Mode
The PWM module output signal is used to set the
operating switching frequency and maximum
allowable duty cycle of the MCP19111. The actual duty
cycle on the HDRV and LDRV is controlled by the
analog PWM control loop. However, this duty cycle
cannot be greater than the value in the PWMRL
register.
There are two modes of operation that concern the
system clock PWM signal. These modes are
stand-alone (non-frequency synchronization) and
frequency synchronization.
26.1.1
STAND-ALONE (NON-FREQUENCY
SYNCHRONIZATION) MODE
26.1.2
SWITCHING FREQUENCY
SYNCHRONIZATION MODE
The MCP19111 can be programmed to be a switching
frequency MASTER or SLAVE device. The MASTER
device functions as described in Section 26.1.1
“Stand-Alone (Non-Frequency Synchronization)
Mode” with the exception of the system clock also
being applied to GPA1.
A SLAVE device will receive the MASTER system
clock on GPA1. This MASTER system clock will be
OR’ed with the output of the TIMER2 module. This
OR’ed signal will latch PWMRL into PWMRH and
PWMPHL into PWMPHH.
Figure 26-1 shows a simplified block diagram of the
CCP module in PWM mode.
The PWMPHL register allows for a phase shift to be
added to the SLAVE system clock.
It is desired to have the MCP19111 SLAVE devices
system clock start point shifted by a programmed
amount from the MASTER system clock. This SLAVE
phase shift is specified by writing to the PWMPHL register. The SLAVE phase shift can be calculated by
using the following equation.
EQUATION 26-2:
SLAVE PHASE SHIFT=PWMPHL•TOSC•(T2 PRESCALE VALUE)
When the MCP19111 is running stand-alone, the PWM
signal functions as the system clock. It is operating at
the programmed switching frequency with a
programmed maximum duty cycle (DCLOCK). The
programmed maximum duty cycle is not adjusted on a
cycle-by-cycle basis to control the MCP19111 system
output. The required duty cycle (DBUCK) to control the
output is adjusted by the MCP19111 analog control
loop and associated circuitry. DCLOCK does, however,
set the maximum allowable DBUCK.
EQUATION 26-1:
D BUCK  1 – D CLOCK
 2013 Microchip Technology Inc.
DS22331A-page 141
MCP19111
FIGURE 26-1:
SIMPLIFIED PWM BLOCK DIAGRAM
PWMRL
PWMPHL
8
8
PWMPHH
(SLAVE)
PWMRH
(SLAVE)
LATCH DATA
LATCH DATA
8
8
Comparator
Comparator
8
R
Q
S
Q
OSC
SYSTEM
CLOCK
8
RESET TIMER
TMR2
(Note 1)
8
Comparator
8
CLKPIN_IN
PR2
Note 1: TIMER 2 should be clocked by FOSC (8 MHz).
A PWM output (Figure 26-2) has a time base (period)
and a time that the output stays high (duty cycle). The
frequency of the PWM is the inverse of the period
(1/period).
FIGURE 26-2:
PWM OUTPUT
26.1.3
PWM PERIOD
The PWM period is specified by writing to the PR2
register. The PWM period can be calculated using the
following equation:
EQUATION 26-3:
Period
PWM PERIOD=[(PR2)+1] x TOSC x (T2 PRESCALE VALUE)
Duty Cycle
TMR2 = PR2 + 1
TMR2 = PWMRH
TMR2 = PR2 + 1
DS22331A-page 142
When TMR2 is equal to PR2, the following two events
occur on the next increment cycle:
• TMR2 is cleared
• The PWM duty cycle is latched from PWMRL into
PWMRH
 2013 Microchip Technology Inc.
MCP19111
26.1.4
PWM DUTY CYCLE (DCLOCK)
26.2
The PWM duty cycle (DCLOCK) is specified by writing
to the PWMRL register. Up to 8-bit resolution is
available. The following equation is used to calculate
the PWM duty cycle (DCLOCK):
Operation during Sleep
When the device is placed in Sleep, the allocated
timer will not increment and the state of the module will
not change. If the CLKPIN pin is driving a value, it will
continue to drive that value. When the device wakes
up, it will continue from this state.
EQUATION 26-4:
PWM DUTY CYCLE=PWMRL x TOSC x (T2 PRESCALE VALUE)
The PWMRL bits can be written to at any time, but the
duty cycle value is not latched into PWMRH until after
a match between PR2 and TMR2 occurs.
TABLE 26-1:
SUMMARY OF REGISTERS ASSOCIATED WITH PWM MODULE
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
APFCON
—
—
—
—
—
—
—
CLKSEL
110
T2CON
—
—
—
—
—
Name
PR2
TMR2ON T2CKPS1 T2CKPS0
139
Timer2 Module Period Register
138*
PWMRL
PWM Register Low Byte
141*
PWMPHL
SLAVE Phase Shift Byte
141*
BUFFCON
MLTPH2
MLTPH1
MLTPH0
ASEL4
ASEL3
ASEL2
ASEL1
ASEL0
56
Legend: — = Unimplemented locations, read as ‘0’. Shaded cells are not used by Capture mode.
* Page provides register information.
 2013 Microchip Technology Inc.
DS22331A-page 143
MCP19111
NOTES:
DS22331A-page 144
 2013 Microchip Technology Inc.
MCP19111
27.0
27.1
The I2C interface supports the following modes and
features:
MASTER SYNCHRONOUS
SERIAL PORT (MSSP)
MODULE
•
•
•
•
•
•
•
•
•
•
•
•
•
Master SSP (MSSP) Module
Overview
The Master Synchronous Serial Port (MSSP) module is
a serial interface useful for communicating with other
peripheral or microcontroller devices. These peripheral
devices may be Serial EEPROMs, shift registers,
display drivers, A/D converters, etc. The MSSP module
only operates in Inter-Integrated Circuit (I2C) mode.
• Serial Peripheral Interface (SPI)
• Inter-Integrated Circuit (I2C)
Master mode
Slave mode
Byte NACKing (Slave mode)
Limited Multi-Master support
7-bit and 10-bit addressing
Start and Stop interrupts
Interrupt masking
Clock stretching
Bus collision detection
General call address matching
Dual Address masking
Address Hold and Data Hold modes
Selectable SDA hold times
Figure 27-1 is a block diagram of the I2C interface
module in Master mode. Figure 27-2 is a diagram of the
I2C interface module in Slave mode.
MSSP BLOCK DIAGRAM (I2C MASTER MODE)
Internal
data bus
Read
[SSPM 3:0]
Write
SSPBUF
SCL
Receive Enable (RCEN)
SSPSR
SCL in
Bus Collision
 2013 Microchip Technology Inc.
MSb
LSb
Start bit, Stop bit,
Acknowledge
Generate (SSPCON2)
Start bit detect,
Stop bit detect
Write collision detect
Clock arbitration
State counter for
end of XMIT/RCV
Address Match detect
(Hold off clock source)
Shift
Clock
SDA in
Clock Cntl
SDA
Baud rate
generator
(SSPADD)
Clock arbitrate/BCOL detect
FIGURE 27-1:
Set/Reset: S, P, SSPSTAT, WCOL, SSPxOV
Reset SEN, PEN (SSPCON2)
Set SSPIF, BCLIF
DS22331A-page 145
MCP19111
FIGURE 27-2:
MSSP BLOCK DIAGRAM (I2C SLAVE MODE)
Internal
Data Bus
Read
Write
SSPBUF Reg
SCL
Shift
Clock
SSPSR Reg
SDA
MSb
LSb
SSPMSK Reg
Match Detect
Addr Match
SSPADD Reg
Start and
Stop bit Detect
27.2
I2C MODE OVERVIEW
The Inter-Integrated Circuit Bus (I2C) is a multi-master
serial data communication bus. Devices communicate
in a master/slave environment, where the master
devices initiate the communication. A Slave device is
controlled through addressing.
The MSSP module has eight registers for I2C
operation. They are the:
•
•
•
•
•
•
•
•
•
•
MSSP Status Register (SSPSTAT)
MSSP Control Register1 (SSPCON1)
MSSP Control Register2 (SSPCON2)
MSSP Control Register3 (SPPCON3)
Serial Receive/Transmit Buffer (SSPBUF)
MSSP Shift Register (SSPSR) - Not directly
accessible
MSSP Address Register (SSPADD)
MSSP Address Register2 (SSPADD2)
MSSP Address Mask Register1 (SSPMSK)
MSSP Address Mask Register2 (SSPMSK2)
DS22331A-page 146
Set, Reset
S, P bits
(SSPSTAT Reg)
The SSPCON1 register is used to define the I2C mode.
Four selection bits (SSPCON1<3:0>) allow one of the
following I2C modes to be selected:
•
•
•
•
I2C Slave mode (7-bit address)
I2C Slave mode (10-bit address)
I2C Master mode, clock = OSC/4 (SSPADD +1)
I2C firmware controlled Master mode (Slave idle)
The SSPSTAT register gives the status of the data
transfer. This information includes detection of a
START or STOP bit, specifies if the data received byte
was data or address, if the next byte is completion of
the 10-bit address, and if this will be a read or write data
transfer.
The SSPBUF is the register to which transfer data is
written to or read from. The SSPSR register shifts the
data in or out of the device. In receive operation, the
SSPBUF and SSPSR create a double buffer receiver.
This allows reception of the next byte to begin before
reading the last byte of received data. When the
complete byte is received before the SSPBUF register
is read, a receiver overflow has occurred and the
SSPOV bit (SSPCON1<6>) is set and the byte in the
SSPSR is lost.
 2013 Microchip Technology Inc.
MCP19111
The I2C bus specifies two signal connections:
• Serial Clock (SCL)
• Serial Data (SDA)
Both the SCL and SDA connections are bidirectional
open-drain lines, each requiring pull-up resistors for the
supply voltage. Pulling the line to ground is considered
a logical zero; letting the line float is considered a
logical one.
Before selecting any I2C mode, the SCL and SDA pins
must be programmed to inputs by setting the
appropriate TRIS bits. Selecting I2C mode, by setting
the SSPEN bit, enables the SCL and SDA pins to be
used as clock and data lines in I2C mode.
Figure 27-3 shows a typical connection between two
devices configured as master and slave.
FIGURE 27-3:
I2C MASTER/SLAVE
CONNECTION
VDD
SCL
VDD
Slave
SDA
SDA
The I2C bus can operate with one or more master
devices and one or more slave devices.
There are four potential modes of operation for a given
device:
• Master Transmit mode
(master is transmitting data to a slave)
• Master Receive mode
(master is receiving data from a slave)
• Slave Transmit mode
(slave is transmitting data to a master)
• Slave Receive mode
(slave is receiving data from the master)
To begin communication, a master device starts out in
Master Transmit mode. The master device sends out a
Start bit followed by the address byte of the slave it
intends to communicate with. This is followed by a
single Read/Write bit, which determines whether the
master intends to transmit to or receive data from the
slave device.
If the requested slave exists on the bus, it will respond
with an Acknowledge bit, otherwise known as an ACK.
The master then continues in either Transmit mode or
Receive mode and the slave continues in the
complement, either in Receive mode or Transmit
mode, respectively.
 2013 Microchip Technology Inc.
The Acknowledge bit (ACK) is an active-low signal,
which holds the SDA line low to indicate to the
transmitter that the slave device has received the
transmitted data and is ready to receive more.
The transition of a data bit is always performed while
the SCL line is held low. Transitions that occur while the
SCL line is held high are used to indicate Start and Stop
bits.
If the master intends to write to the slave, then it
repeatedly sends out a byte of data, with the slave
responding after each byte with an ACK bit. In this
example, the master device is in Master Transmit
mode, and the slave is in Slave Receive mode.
If the master intends to read from the slave, then it
repeatedly receives a byte of data from the slave, and
responds after each byte with an ACK bit. In this
example, the master device is in Master Receive mode,
and the slave is Slave Transmit mode.
SCL
Master
A Start bit is indicated by a high-to-low transition of the
SDA line while the SCL line is held high. Address and
data bytes are sent out, Most Significant bit (MSb) first.
The Read/Write bit is sent out as a logical one when the
master intends to read data from the slave, and is sent
out as a logical zero when it intends to write data to the
slave.
On the last byte of data communicated, the master
device may end the transmission by sending a Stop bit.
If the master device is in Receive mode, it sends the
Stop bit in place of the last ACK bit. A Stop bit is
indicated by a low-to-high transition of the SDA line,
while the SCL line is held high.
In some cases, the master may want to maintain
control of the bus and re-initiate another transmission.
If so, the master device may send another Start bit in
place of the Stop bit or last ACK bit when it is in receive
mode.
The I2C bus specifies three message protocols:
• Single message where a master writes data to a
slave
• Single message where a master reads data from
a slave
• Combined message where a master initiates a
minimum of two writes, or two reads, or a
combination of writes and reads, to one or more
slaves
When one device is transmitting a logical one, or letting
the line float, and a second device is transmitting a
logical zero, or holding the line low, the first device can
detect that the line is not a logical one. This detection,
when used on the SCL line, is called clock stretching.
Clock stretching gives slave devices a mechanism to
control the flow of data. When this detection is used on
the SDA line, it is called arbitration. Arbitration ensures
that there is only one master device communicating at
any single time.
DS22331A-page 147
MCP19111
27.2.1
CLOCK STRETCHING
When a slave device has not completed processing
data, it can delay the transfer of more data through the
process of Clock Stretching. An addressed slave
device may hold the SCL clock line low after receiving
or sending a bit, indicating that it is not yet ready to
continue. The master that is communicating with the
slave will attempt to raise the SCL line in order to
transfer the next bit, but will detect that the clock line
has not yet been released. Because the SCL
connection is open-drain, the slave has the ability to
hold that line low until it is ready to continue
communicating.
Clock stretching allows receivers that cannot keep up
with a transmitter to control the flow of incoming data.
27.2.2
ARBITRATION
Each master device must monitor the bus for Start and
Stop bits. If the device detects that the bus is busy, it
cannot begin a new message until the bus returns to an
Idle state.
However, two master devices may try to initiate a
transmission on or about the same time. When this
occurs, the process of arbitration begins. Each
transmitter checks the level of the SDA data line and
compares it to the level that it expects to find. The first
transmitter to observe that the two levels don't match,
loses arbitration, and must stop transmitting on the
SDA line.
For example, if one transmitter holds the SDA line to a
logical one (lets it float) and a second transmitter holds
it to a logical zero (pulls it low), the result is that the
SDA line will be low. The first transmitter then observes
that the level of the line is different than expected and
concludes that another transmitter is communicating.
The first transmitter to notice this difference is the one
that loses arbitration and must stop driving the SDA
line. If this transmitter is also a master device, it also
must stop driving the SCL line. It then can monitor the
lines for a Stop condition before trying to reissue its
transmission. In the meantime, the other device that
has not noticed any difference between the expected
and actual levels on the SDA line continues with it's
original transmission. It can do so without any
complications, because so far, the transmission
appears exactly as expected with no other transmitter
disturbing the message.
If two master devices are sending a message to two
different slave devices at the address stage, the master
sending the lower slave address always wins
arbitration. When two master devices send messages
to the same slave address, and addresses can
sometimes refer to multiple slaves, the arbitration
process must continue into the data stage.
Arbitration usually occurs very rarely, but it is a necessary process for proper multi-master support.
27.3
I2C MODE OPERATION
All MSSP I2C communication is byte oriented and
shifted out MSb first. Six SFR registers and two
interrupt flags interface the module with the PIC
microcontroller and user software. Two pins, SDA and
SCL, are exercised by the module to communicate
with other external I2C devices.
27.3.1
BYTE FORMAT
All communication in I2C is done in 9-bit segments. A
byte is sent from a Master to a Slave or vice-versa, followed by an Acknowledge bit sent back. After the 8th
falling edge of the SCL line, the device outputting data
on the SDA changes that pin to an input and reads in
an acknowledge value on the next clock pulse.
The clock signal, SCL, is provided by the master. Data
is valid to change while the SCL signal is low, and
sampled on the rising edge of the clock. Changes on
the SDA line while the SCL line is high define special
conditions on the bus, explained below.
27.3.2
DEFINITION OF I2C TERMINOLOGY
There is language and terminology in the description
of I2C communication that have definitions specific to
I2C. That word usage is defined below and may be
used in the rest of this document without explanation.
This table was adapted from the Philips I2C
specification.
27.3.3
SDA AND SCL PINS
On the MCP19111, the SCL and SDA pins are always
open-drain. These pins should be set by the user to
inputs by setting the appropriate TRIS bits.
Note: Data is tied to output zero when an I2C
mode is enabled.
Slave Transmit mode can also be arbitrated, when a
master addresses multiple slaves, but this is less
common.
DS22331A-page 148
 2013 Microchip Technology Inc.
MCP19111
27.3.4
SDA HOLD TIME
The hold time of the SDA pin is selected by the SDAHT
bit of the SSPCON3 register. Hold time is the time SDA
is held valid after the falling edge of SCL. Setting the
SDAHT bit selects a longer 300 ns minimum hold time
and may help on buses with large capacitance.
TABLE 27-1:
I2C BUS TERMS
TERM
Description
Transmitter
The device which shifts data out onto the bus.
Receiver
The device which shifts data in from the bus.
Master
The device that initiates a transfer, generates clock signals and terminates a transfer.
Slave
The device addressed by the master.
Multi-Master
A bus with more than one device that can initiate data transfers.
Arbitration
Procedure to ensure that only one master at a time controls the bus. Winning arbitration
ensures that the message is not corrupted.
Synchronization
Procedure to synchronize the clocks of two or more devices on the bus.
Idle
No master is controlling the bus, and both SDA and SCL lines are high.
Active
Any time one or more master devices are controlling the bus.
Addressed Slave
Slave device that has received a matching address and is actively being clocked by a master.
Matching Address
Address byte that is clocked into a slave that matches the value stored in SSPADDx.
Write Request
Slave receives a matching address with R/W bit clear, and is ready to clock in data.
Read Request
Master sends an address byte with the R/W bit set, indicating that it wishes to clock data out of
the Slave. This data is the next and all following bytes until a Restart or Stop.
Clock Stretching
When a device on the bus hold SCL low to stall communication.
Bus Collision
Any time the SDA line is sampled low by the module while it is outputting and expected high
state.
27.3.5
START CONDITION
2C
specification defines a Start condition as a
The I
transition of SDA from a high to a low state, while SCL
line is high. A Start condition is always generated by
the master and signifies the transition of the bus from
an Idle to an Active state. Figure 27-4 shows the wave
forms for Start and Stop conditions.
A bus collision can occur on a Start condition if the
module samples the SDA line low before asserting it
low. This does not conform to the I2C Specification,
that states no bus collision can occur on a Start.
27.3.6
STOP CONDITION
A Stop condition is a transition of the SDA line from
low-to-high state while the SCL line is high.
Note: At least one SCL low time must appear
before a Stop is valid, therefore, if the SDA
line goes low then high again while the SCL
line stays high, only the Start condition is
detected.
 2013 Microchip Technology Inc.
27.3.7
RESTART CONDITION
A Restart is valid any time that a Stop would be valid.
A master can issue a Restart if it wishes to hold the
bus after terminating the current transfer. A Restart
has the same effect on the slave that a Start would,
resetting all slave logic and preparing it to clock in an
address. The master may want to address the same or
another slave.
In 10-bit Addressing Slave mode, a Restart is required
for the master to clock data out of the addressed
slave. Once a slave has been fully addressed, matching both high and low address bytes, the master can
issue a Restart and the high address byte with the
R/W bit set. The slave logic will then hold the clock
and prepare to clock out data.
After a full match with R/W clear in 10-bit mode, a prior
match flag is set and maintained. Until a Stop
condition, a high address with R/W clear or a high
address match fails.
DS22331A-page 149
MCP19111
27.3.8
START/STOP CONDITION INTERRUPT
MASKING
The SCIE and PCIE bits of the SSPCON3 register can
enable the generation of an interrupt in Slave modes
that do not typically support this function. These bits
will have no effect on slave modes where interrupt on
Start and Stop detect are already enabled.
FIGURE 27-4:
I2C START AND STOP CONDITIONS
SDA
SCL
S
Start
Condition
FIGURE 27-5:
P
Change of
Data Allowed
Change of
Data Allowed
Stop
Condition
I2C RESTART CONDITION
Sr
Change of
Data Allowed
27.3.9
ACKNOWLEDGE SEQUENCE
The 9th SCL pulse for any transferred byte in I2C is
dedicated as an Acknowledge. It allows receiving
devices to respond back to the transmitter by pulling
the SDA line low. The transmitter must release control
of the line during this time to shift in the response. The
Acknowledge (ACK) is an active-low signal, pulling the
SDAx line low indicates to the transmitter that the
device has received the transmitted data and is ready
to receive more.
The result of an ACK is placed in the ACKSTAT bit of
the SSPCON2 register.
Slave software, when the AHEN and DHEN bits are
set, allow the user to set the ACK value sent back to
the transmitter. The ACKDT bit of the SSPCON2 register is set/cleared to determine the response.
DS22331A-page 150
Restart
Condition
Change of
Data Allowed
Slave hardware will generate an ACK response if the
AHEN and DHEN bits of the SSPCON3 register are
clear.
There are certain conditions where an ACK will not be
sent by the slave. If the BF bit of the SSPSTAT register
or the SSPOV bit of the SSPCON1 register are set
when a byte is received, an ACK will not be sent.
When the module is addressed, after the 8th falling
edge of SCL on the bus, the ACKTIM bit of the
SSPCON3 register is set. The ACKTIM bit indicates
the acknowledge time of the active bus. The ACKTIM
Status bit is only active when the AHEN bit or DHEN
bit is enabled.
 2013 Microchip Technology Inc.
MCP19111
27.4
I2C SLAVE MODE OPERATION
The MSSP Slave mode operates in one of the four
modes selected in the SSPM bits of SSPCON1
register. The modes can be divided into 7-bit and
10-bit Addressing mode. 10-bit Addressing mode
operate the same as 7-bit, with some additional
overhead for handling the larger addresses.
Modes with Start and Stop bit interrupts operate the
same as the other modes. The exception is the SSPIF
bit getting set upon detection of a Start, Restart or Stop
condition.
27.4.1
SLAVE MODE ADDRESSES,
SSPADD
The SSPADD register (Register 27-7) contains the
Slave mode address. The first byte received after a
Start or Restart condition is compared against the
value stored in this register. If the byte matches, the
value is loaded into the SSPBUF register and an
interrupt is generated. If the value does not match, the
module goes idle and no indication is given to the
software that anything happened.
The SSPMSK register (Register 27-6) affects the
address matching process. See Section 27.4.10
“SSPMSKx Register” for more information.
27.4.2
SECOND SLAVE MODE ADDRESS,
SSPADD2
The SSPADD2 register (Register 27-9) contains a
second Slave mode address. To enable the use of this
second Slave mode address, bit 0 must be set. The
first byte received after a Start or Restart condition is
compared against the value stored in this register. If
the byte matches, the value is loaded into the
SSPBUF register and an interrupt is generated. If the
value does not match, the module goes Idle and no
indication is given to the software that anything
happened.
The SSPMSK2 register, Register 27-8, affects the
address matching process. See Section 27.4.10
“SSPMSKx Register” for more information.
27.4.2.1
I2C Slave 7-bit Addressing Mode
In 7-bit Addressing mode, the LSb of the received data
byte is ignored when determining if there is an address
match.
 2013 Microchip Technology Inc.
27.4.2.2
I2C Slave 10-bit Addressing Mode
In 10-bit Addressing mode, the first received byte is
compared to the binary value of ‘1 1 1 1 0 A9 A8 0’. A9
and A8 are the two MSb of the 10-bit address and
stored in bits 2 and 1 of the SSPADDx register.
After the acknowledge of the high byte the UA bit is set
and SCL is held low until the user updates SSPADDx
with the low address. The low address byte is clocked
in and all 8 bits are compared to the low address value
in SSPADDx. Even if there is not an address match;
SSPIF and UA are set, and SCL is held low until
SSPADDx is updated to receive a high byte again.
When SSPADDx is updated, the UA bit is cleared. This
ensures the module is ready to receive the high
address byte on the next communication.
A high and low address match as a write request is
required at the start of all 10-bit addressing
communication. A transmission can be initiated by
issuing a Restart once the slave is addressed, and
clocking in the high address with the R/W bit set. The
slave hardware will then acknowledge the read
request and prepare to clock out data. This is only
valid for a slave after it has received a complete high
and low address byte match.
27.4.3
SLAVE RECEPTION
When the R/W bit of a matching received address byte
is clear, the R/W bit of the SSPSTAT register is cleared.
The received address is loaded into the SSPBUF
register and acknowledged.
When an overflow condition exists for a received
address, then not Acknowledge is given. An overflow
condition is defined as either bit BF of the SSPSTAT
register is set, or bit SSPOV of the SSPCON1 register
is set. The BOEN bit of the SSPCON3 register modifies
this operation. For more information, see
Register 27-5.
An MSSP interrupt is generated for each transferred
data byte. Flag bit, SSPIF, must be cleared by software.
When the SEN bit of the SSPCON2 register is set, SCL
will be held low (clock stretch) following each received
byte. The clock must be released by setting the CKP
bit of the SSPCON1 register, except sometimes in
10-bit mode.
DS22331A-page 151
MCP19111
27.4.3.1
7-bit Addressing Reception
This section describes a standard sequence of events
for the MSSP module configured as an I2C Slave in
7-bit Addressing mode, all decisions made by
hardware or software and their effect on reception.
Figure 27-6 and Figure 27-7 are used as a visual
reference for this description.
This is a step-by-step process of what typically must
be done to accomplish I2C communication.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Start bit detected.
S bit of SSPSTAT is set; SSPIF is set if interrupt
on Start detect is enabled.
Matching address with R/W bit clear is received.
The slave pulls SDA low sending an ACK to the
master, and sets SSPIF bit.
Software clears the SSPIF bit.
Software reads received address from SSPBUF
clearing the BF flag.
If SEN = 1, Slave software sets CKP bit to
release the SCL line.
The master clocks out a data byte.
Slave drives SDA low sending an ACK to the
master, and sets SSPIF bit.
Software clears SSPIF.
Software reads the received byte from SSPBUF
clearing BF.
Steps 8–12 are repeated for all received bytes
from the Master.
Master sends Stop condition, setting P bit of
SSPSTAT, and the bus goes Idle.
27.4.3.2
7-bit Reception with AHEN and
DHEN
Slave device reception with AHEN and DHEN set
operates the same as without these options with extra
interrupts and clock stretching added after the 8th
falling edge of SCL. These additional interrupts allow
the slave software to decide whether it wants to ACK
the receive address or data byte, rather than the
hardware. This functionality adds support for PMBus
that was not present on previous versions of this
module.
This list describes the steps that need to be taken by
slave software to use these options for I2C
communication. Figure 27-8 displays a module using
both address and data holding. Figure 27-9 includes
the operation with the SEN bit of the SSPCON2
register set.
1.
S bit of SSPSTAT is set; SSPIF is set if interrupt
on Start detect is enabled.
2. Matching address with R/W bit clear is clocked
in. SSPIF is set and CKP cleared after the 8th
falling edge of SCL.
3. Slave clears the SSPIF.
4. Slave can look at the ACKTIM bit of the
SSPCON3 register to determine if the SSPIF
was after or before the ACK.
5. Slave reads the address value from SSPBUF,
clearing the BF flag.
6. Slave sets ACK value clocked out to the master
by setting ACKDT.
7. Slave releases the clock by setting CKP.
8. SSPxIF is set after an ACK, not after a NACK.
9. If SEN = 1 the slave hardware will stretch the
clock after the ACK.
10. Slave clears SSPIF.
Note: SSPIF is still set after the 9th falling edge of
SCL even if there is no clock stretching and
BF has been cleared. Only if NACK is sent
to Master is SSPIF not set.
11. SSPIF set and CKP cleared after 8th falling
edge of SCL for a received data byte.
12. Slave looks at ACKTIM bit of SSPCON3 to
determine the source of the interrupt.
13. Slave reads the received data from SSPBUF
clearing BF.
14. Steps 7–14 are the same for each received data
byte.
15. Communication is ended by either the slave
sending an ACK = 1, or the master sending a
Stop condition. If a Stop is sent and Interrupt on
Stop Detect is disabled, the slave will only know
by polling the P bit of the SSTSTAT register.
DS22331A-page 152
 2013 Microchip Technology Inc.
 2013 Microchip Technology Inc.
I2C SLAVE, 7-BIT ADDRESS, RECEPTION (SEN = 0, AHEN = 0, DHEN = 0)
FIGURE 27-6:
Bus Master sends
Stop condition
From Slave to Master
Receiving Address
SDA
SCL
S
Receiving Data
A7
A6
A5
A4
A3
A2
A1
1
2
3
4
5
6
7
ACK
8
9
Receiving Data
D7
D6
D5
D4
D3
D2
D1
1
2
3
4
5
6
7
D0 ACK D7
8
9
1
ACK = 1
D6
D5
D4
D3
D2
D1
D0
2
3
4
5
6
7
8
9
P
SSPIF
Cleared by software
Cleared by software
SSPIF set on 9th
falling edge of
SCL
BF
SSPBUF is read
First byte
of data is
available
in SSPBUF
SSPOV
SSPOV set because
SSPBUF is still full.
ACK is not sent.
MCP19111
DS22331A-page 153
Bus Master sends
Stop condition
Receive Address
SDA
SCL
S
Receive Data
A7
A6
A5
A4
A3
A2
A1
1
2
3
4
5
6
7
R/W=0 ACK
8
9
SEN
Receive Data
D7
D6
D5
D4
D3
D2
D1
D0
ACK
1
2
3
4
5
6
7
8
9
SEN
ACK
D7
D6
D5
D4
D3
D2
D1
D0
1
2
3
4
5
6
7
8
9
P
Clock is held low until CKP is set to ‘1’
SSPIF
Cleared by software
BF
SSPBUF is read
Cleared by software
SSPIF set on 9th
falling edge of SCL
First byte
of data is
available
in SSPBUF
SSPOV
SSPOV set because
SSPBUF is still full.
ACK is not sent.
CKP
CKP is written to ‘1’ in software,
releasing SCL
CKP is written to 1 in software,
releasing SCL
 2013 Microchip Technology Inc.
SCL is not held
low because
ACK= 1
MCP19111
DS22331A-page 154
I2C SLAVE, 7-BIT ADDRESS, RECEPTION (SEN = 1, AHEN = 0, DHEN = 0)
FIGURE 27-7:
 2013 Microchip Technology Inc.
FIGURE 27-8:
I2C SLAVE, 7-BIT ADDRESS, RECEPTION (SEN = 0, AHEN = 1, DHEN = 1)
Master sends
Stop condition
Master Releases SDAx
to slave for ACK sequence
Receiving Address
SDA
Receiving Data
Received Data
ACK
ACK D7 D6 D5 D4 D3 D2 D1 D0
A7 A6 A5 A4 A3 A2 A1
ACK=1
D7 D6 D5 D4 D3 D2 D1 D0
SCL
S
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
P
SSPIF
If AHEN = 1:
SSPIF is set
BF
ACKDT
SSPIF is set on
9th falling edge of
SCL, after ACK
Address is
read from
SSBUF
Data is read from SSPBUF
Slave software
clears ACKDT to
CKP
Slave software
sets ACKDT to
not ACK
ACK the received
byte
When AHEN=1:
CKP is cleared by hardware
and SCL is stretched
No interrupt
after not ACK
from Slave
Cleared by software
When DHEN=1:
CKP is cleared by
hardware on 8th falling
edge of SCL
CKP set by software,
SCL is released
ACKTIM
ACKTIM set by hardware
on 8th falling edge of SCL
ACKTIM cleared by
hardware in 9th
rising edge of SCL
ACKTIM set by hardware
on 8th falling edge of SCL
S
DS22331A-page 155
MCP19111
P
R/W = 0
Receiving Address
SDA
Master sends
Stop condition
Master releases
SDA to slave for ACK sequence
Receive Data
ACK
A7 A6 A5 A4 A3 A2 A1
ACK
SCL
S
1
2 3
4
5
6 7
8
9
1
2
3
4
5
6 7
ACK
Receive Data
D7 D6 D5 D4 D3 D2 D1 D0
8
9
D7 D6 D5 D4 D3 D2 D1 D0
1
2
3 4
5
6 7
8
9
P
SSPIF
No interrupt after
if not ACK
from Slave
Cleared by software
BF
Received
address is loaded into
SSPBUF
Received data is
available on SSPBUF
ACKDT
Slave software clears
ACKDT to ACK
the received byte
SSPBUF can be
read any time before
next byte is loaded
Slave sends
not ACK
CKP
When AHEN = 1;
on the 8th falling edge
of SCL of an address
byte, CKP is cleared
When DHEN = 1;
on the 8th falling edge
of SCL of a received
data byte, CKP is cleared
ACKTIM
 2013 Microchip Technology Inc.
ACKTIM is set by hardware
on 8th falling edge of SCL
S
P
ACKTIM is cleared by hardware
on 9th rising edge of SCL
Set by software,
release SCL
CKP is not cleared
if not ACK
MCP19111
DS22331A-page 156
I2C SLAVE, 7-BIT ADDRESS, RECEPTION (SEN = 1, AHEN = 1, DHEN = 1)
FIGURE 27-9:
MCP19111
27.4.4
SLAVE TRANSMISSION
27.4.4.2
7-bit Transmission
When the R/W bit of the incoming address byte is set
and an address match occurs, the R/W bit of the
SSPSTAT register is set. The received address is
loaded into the SSPBUF register, and an ACK pulse is
sent by the slave on the ninth bit.
A master device can transmit a read request to a
slave, and then clock data out of the slave. The list
below outlines what software for a slave will need to
do to accomplish a standard transmission.
Figure 27-10 can be used as a reference to this list.
Following the ACK, slave hardware clears the CKP bit
and the SCL pin is held low (see Section 27.4.7
“Clock Stretching” for more detail). By stretching the
clock, the master will be unable to assert another clock
pulse until the slave is done preparing the transmit
data.
1.
The transmit data must be loaded into the SSPBUF
register which also loads the SSPSR register. Then the
SCL pin should be released by setting the CKP bit of
the SSPCON1 register. The eight data bits are shifted
out on the falling edge of the SCL input. This ensures
that the SDA signal is valid during the SCL high time.
The ACK pulse from the master-receiver is latched on
the rising edge of the ninth SCL input pulse. This ACK
value is copied to the ACKSTAT bit of the SSPCON2
register. If ACKSTAT is set (not ACK), then the data
transfer is complete. In this case, when the not ACK is
latched by the slave, the slave goes Idle and waits for
another occurrence of the Start bit. If the SDA line was
low (ACK), the next transmit data must be loaded into
the SSPBUF register. Again, the SCL pin must be
released by setting bit CKP.
An MSSP interrupt is generated for each data transfer
byte. The SSPIF bit must be cleared by software and
the SSPSTAT register is used to determine the status
of the byte. The SSPIF bit is set on the falling edge of
the ninth clock pulse.
27.4.4.1
Slave Mode Bus Collision
A slave receives a Read request and begins shifting
data out on the SDA line. If a bus collision is detected
and the SBCDE bit of the SSPCON3 register is set, the
BCLIF bit of the PIR register is set. Once a bus collision
is detected, the slave goes Idle and waits to be
addressed again. User software can use the BCLIF bit
to handle a slave bus collision.
 2013 Microchip Technology Inc.
Master sends a Start condition on SDA and
SCL.
2. S bit of SSPSTAT is set; SSPIF is set if interrupt
on Start detect is enabled.
3. Matching address with R/W bit set is received by
the Slave setting SSPIF bit.
4. Slave hardware generates an ACK and sets
SSPIF.
5. SSPIF bit is cleared by user.
6. Software reads the received address from SSPBUF, clearing BF.
7. R/W is set so CKP was automatically cleared
after the ACK.
8. The slave software loads the transmit data into
SSPBUF.
9. CKP bit is set releasing SCL, allowing the
master to clock the data out of the slave.
10. SSPIF is set after the ACK response from the
master is loaded into the ACKSTAT register.
11. SSPIF bit is cleared.
12. The slave software checks the ACKSTAT bit to
see if the master wants to clock out more data.
Note 1:If the master ACKs the clock will be
stretched.
2: ACKSTAT is the only bit updated on the
rising edge of SCL (9th) rather than the
falling.
13. Steps 9-13 are repeated for each transmitted
byte.
14. If the master sends a not ACK; the clock is not
held, but SSPIF is still set.
15. The master sends a Restart condition or a Stop.
16. The slave is no longer addressed.
DS22331A-page 157
I2C SLAVE, 7-BIT ADDRESS, TRANSMISSION (AHEN = 0)
Master sends
Stop condition
Receiving Address
SDA
Transmitting Data
Automatic
ACK
A7 A6 A5 A4 A3 A2 A1
R/W = 1 Automatic
ACK
D7 D6 D5 D4 D3 D2 D1 D0 ACK
D7 D6 D5 D4 D3 D2 D1 D0
Transmitting Data
1
8
1
1
SCL
2
3
4
5
6
7
9
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
S
SSPIF
Cleared by software
BF
Received address
is read from SSPBUF
Data to transmit is
loaded into SSPBUF
BF is automatically
cleared after 8th falling
edge of SCL
CKP
When R/W is set
SCL is always
held low after 9th SCL
falling edge
Set by software
CKP is not
held for not
ACK
ACKSTAT
Masters not ACK
is copied to
ACKSTAT
R/W
R/W is copied from the
matching address byte
D/A
 2013 Microchip Technology Inc.
Indicates an address
has been received
S
P
9
P
MCP19111
DS22331A-page 158
FIGURE 27-10:
MCP19111
27.4.4.3
7-bit Transmission with Address
Hold Enabled
Setting the AHEN bit of the SSPCON3 register
enables additional clock stretching and interrupt
generation after the 8th falling edge of a received
matching address. Once a matching address has
been clocked in, CKP is cleared and the SSPIF
interrupt is set.
Figure 27-11 displays a standard waveform of a 7-bit
Address Slave Transmission with AHEN enabled.
1.
2.
Bus starts Idle.
Master sends Start condition; the S bit of
SSPSTAT is set; SSPIF is set if interrupt on Start
detect is enabled.
3. Master sends matching address with R/W bit
set. After the 8th falling edge of the SCL line, the
CKP bit is cleared and SSPIF interrupt is
generated.
4. Slave software clears SSPIF.
5. Slave software reads ACKTIM bit of SSPCON3
register, and R/W and D/A of the SSPSTAT
register to determine the source of the interrupt.
6. Slave reads the address value from the
SSPBUF register clearing the BF bit.
7. Slave software decides from this information if it
wishes to ACK or not ACK and sets ACKDT bit
of the SSPCON2 register accordingly.
8. Slave sets the CKP bit releasing SCL.
9. Master clocks in the ACK value from the slave.
10. Slave hardware automatically clears the CKP bit
and sets SSPIF after the ACK if the R/W bit is
set.
11. Slave software clears SSPIF.
12. Slave loads value to transmit to the master into
SSPBUF setting the BF bit.
Note: SSPBUF cannot be loaded until after the
ACK.
13. Slave sets CKP bit releasing the clock.
14. Master clocks out the data from the slave and
sends an ACK value on the 9th SCL pulse.
15. Slave hardware copies the ACK value into the
ACKSTAT bit of the SSPCON2 register.
16. Steps 10–15 are repeated for each byte
transmitted to the master from the slave.
17. If the master sends a not ACK the slave
releases the bus allowing the master to send a
Stop and end the communication.
Note: Master must send a not ACK on the last byte
to ensure that the slave releases the SCL
line to receive a Stop.
 2013 Microchip Technology Inc.
DS22331A-page 159
Master sends
Stop condition
Master releases SDAx
to slave for ACK sequence
Receiving Address
SDA
ACK
A7 A6 A5 A4 A3 A2 A1
SCL
S
1
2
3
4
5
6
Automatic
R/W = 1
7
8
9
Transmitting Data
Automatic
ACK
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
1
1
2
3
4
5
6
7
8
9
Transmitting Data
2
3
4
5
6
7
Cleared by software
BF
Received address
is read from SSPBUF
Data to transmit is
loaded into SSPBUF
BF is automatically
cleared after 8th falling
edge of SCL
ACKDT
Slave clears
ACKDT to ACK
address
ACKSTAT
Master’s ACK
response is copied
to SSPSTAT
CKP
When AHEN = 1;
CKP is cleared by hardware
after receiving matching
address.
 2013 Microchip Technology Inc.
R/W
D/A
8
9
P
SSPIF
ACKTIM
ACK
ACKTIM is set on 8th falling
edge of SCL
When R/W = 1;
CKP is always
cleared after ACK
Set by software,
releases SCL
ACKTIM is cleared
on 9th rising edge of SCL
CKP not cleared
after not ACK
MCP19111
DS22331A-page 160
I2C SLAVE, 7-BIT ADDRESS, TRANSMISSION (AHEN = 1)
FIGURE 27-11:
MCP19111
27.4.5
SLAVE MODE 10-BIT ADDRESS
RECEPTION
This section describes a standard sequence of events
for the MSSP module configured as an I2C Slave in
10-bit Addressing mode.
Figure 27-12 is used as a visual reference for this
description.
This is a step-by-step process of what must be done
by slave software to accomplish I2C communication.
1.
2.
3.
4.
5.
6.
7.
8.
Bus starts Idle.
Master sends Start condition; S bit of SSPSTAT
is set; SSPIF is set, if interrupt on Start detect is
enabled.
Master sends matching high address with R/W
bit clear; UA bit of the SSPSTAT register is set.
Slave sends ACK and SSPIF is set.
Software clears the SSPIF bit.
Software reads received address from SSPBUF
clearing the BF flag.
Slave loads low address into SSPADDx,
releasing SCL.
Master sends matching low-address byte to the
Slave; UA bit is set.
Note:
9.
27.4.6
10-BIT ADDRESSING WITH
ADDRESS OR DATA HOLD
Reception using 10-bit addressing with AHEN or DHEN
set is the same as with 7-bit modes. The only difference
is the need to update the SSPADDx register using the
UA bit. All functionality, specifically when the CKP bit is
cleared and SCL line is held low, are the same.
Figure 27-13 can be used as a reference of a slave in
10-bit addressing with AHEN set.
Figure 27-14 shows a standard waveform for a slave
transmitter in 10-bit Addressing mode.
Updates to the SSPADDx register are not
allowed until after the ACK sequence.
Slave sends ACK and SSPIF is set.
Note:
If the low address does not match, SSPIF
and UA are still set so that the slave software can set SSPADDx back to the high
address. BF is not set because there is no
match. CKP is unaffected.
10. Slave clears SSPIF.
11. Slave reads the received matching address
from SSPBUF clearing BF.
12. Slave loads high address into SSPADD.
13. Master clocks a data byte to the slave and
clocks out the slaves ACK on the 9th SCL pulse;
SSPIF is set.
14. If SEN bit of SSPCON2 is set, CKP is cleared by
hardware and the clock is stretched.
15. Slave clears SSPIF.
16. Slave reads the received byte from SSPBUF
clearing BF.
17. If SEN is set, the slave sets CKP to release the
SCL.
18. Steps 13–17 repeat for each received byte.
19. Master sends Stop to end the transmission.
 2013 Microchip Technology Inc.
DS22331A-page 161
Master sends
Stop condition
Receive Second Address Byte
Receive First Address Byte
SDA
SCL
1
1
1
1
0 A9 A8
1
2
3
4
5
6
7
ACK
8
9
A7 A6 A5 A4 A3 A2 A1 A0 ACK
1
2
3
4
5
6
7
8
9
Receive Data
Receive Data
D7 D6 D5 D4 D3 D2 D1 D0 ACK
1
2
3
4
5
6
7
8
9
D7 D6 D5 D4 D3 D2 D1 D0 ACK
1
2
3
4
5
6
7
S
SCL is held low
while CKP = 0
SSPIF
Set by hardware
on 9th falling edge
Cleared by software
If address matches
SSPADD it is loaded into
SSPBUF
Receive address is
read from SSPBUF
BF
Data is read
from SSPBUF
UA
When UA = 1;
SCL is held low
Software updates SSPADD
and releases SCL
CKP
 2013 Microchip Technology Inc.
Set by software,
When SEN = 1;
releasing SCL
CKP is cleared after
9th falling edge of received byte
8
9
P
MCP19111
DS22331A-page 162
I2C SLAVE, 10-BIT ADDRESS, RECEPTION (SEN = 1, AHEN = 0, DHEN = 0)
FIGURE 27-12:
 2013 Microchip Technology Inc.
I2C SLAVE, 10-BIT ADDRESS, RECEPTION (SEN = 0, AHEN = 1, DHEN = 0)
FIGURE 27-13:
Receive First Address Byte
SDA
SCL
S
Receive Second Address Byte
R/W = 0
1
1
1
1
0
A9
A8
1
2
3
4
5
6
7
ACK
8
9
UA
Receive Data
A7
A6
A5
A4
A3
A2
A1
A0
ACK
1
2
3
4
5
6
7
8
9
UA
Receive Data
D7
D6
D5
D4
D3
D2
D1
1
2
3
4
5
6
7
D0 ACK D7
8
9
1
D6 D5
2
SSPIF
Set by hardware
on 9th falling edge
Cleared by software
Cleared by software
BF
SSPBUF can be
read anytime before
the next received byte
Received data
is read from
SSPBUF
ACKDT
Slave software clears
ACKDT to ACK
the received byte
UA
Update to SSPADD is
not allowed until 9th
falling edge of SCL
CKP
ACKTIM
DS22331A-page 163
ACKTIM is set by hardware
on 8th falling edge of SCL
Set CKP with software
releases SCL
MCP19111
If when AHEN = 1;
on the 8th falling edge
of SCL of an address
byte, CKP is cleared
Update of SSPADD,
clears UA and releases
SCL
Master sends
Restart event
Receiving Address R/W = 0
1 1 1 1 0 A9 A8
ACK
SDA
SCL
S
1
2
3
4
5
6
7
8
9
Master sends
not ACK
Receiving Second Address Byte
Receive First Address Byte
A7 A6 A5 A4 A3 A2 A1 A0 ACK
1 1 1 1 0 A9 A8
1
2
3
4
5
6
7 8
1
9
2 3
4
5
6
7 8
Transmitting Data Byte
ACK
9
ACK = 1
D7 D6 D5 D4 D3 D2 D1 D0
1
2
3
4
5
6
7
8
Sr
SSPIF
Set by hardware
Cleared by software
Set by hardware
BF
SSPBUF loaded
with received address
Received address is
read from SSPBUF
Data to transmit is
loaded into SSPBUF
UA
UA indicates SSPADD
must be updated
CKP
After SSPADD is
updated, UA is cleared
and SCL is released
High address is loaded
back into SSPADD
When R/W = 1;
CKP is cleared on
9th falling edge of SCLx
ACKSTAT
Set by software
releases SCL
Masters not ACK
is copied
R/W
R/W is copied from the
matching address byte
D/A
 2013 Microchip Technology Inc.
Indicates an address
has been received
Master sends
Stop condition
9
P
MCP19111
DS22331A-page 164
I2C SLAVE, 10-BIT ADDRESS, TRANSMISSION (SEN = 0, AHEN = 0, DHEN = 0)
FIGURE 27-14:
MCP19111
27.4.7
CLOCK STRETCHING
27.4.7.2
Clock stretching occurs when a device on the bus holds
the SCL line low, effectively pausing communication.
The slave may stretch the clock to allow more time to
handle data or prepare a response for the master
device. A master device is not concerned with
stretching, as anytime it is active on the bus and not
transferring data it is stretching. Any stretching done by
a slave is invisible to the master software and handled
by the hardware that generates SCL.
The CKP bit of the SSPCON1 register is used to control
stretching in software. Any time the CKP bit is cleared,
the module will wait for the SCL line to go low and then
hold it. Setting CKP will release SCL and allow more
communication.
27.4.7.1
Normal Clock Stretching
Following an ACK, if the R/W bit of the SSPSTAT is
set, causing a read request, the slave hardware will
clear CKP. This allows the slave time to update
SSPBUF with data to transfer to the master. If the SEN
bit of SSPCON2 is set, the slave hardware will always
stretch the clock after the ACK sequence. Once the
slave is ready; CKP is set by software and
communication resumes.
Note 1: The BF bit has no effect on if the clock will
be stretched or not. This is different than
previous versions of the module that
would not stretch the clock or clear CKP,
if SSPBUF was read before the 9th falling
edge of SCL.
2: Previous versions of the module did not
stretch the clock for a transmission if
SSPBUF was loaded before the 9th falling
edge of SCL. It is now always cleared for
read requests.
FIGURE 27-15:
10-bit Addressing Mode
In 10-bit Addressing mode, when the UA bit is set, the
clock is always stretched. This is the only time the SCL
is stretched without CKP being cleared. SCL is
released immediately after a write to SSPADDx.
Note: Previous versions of the module did not
stretch the clock if the second address byte
did not match.
27.4.7.3
Byte NACKing
When AHEN bit of SSPCON3 is set; CKP is cleared by
the hardware after the 8th falling edge of SCL for a
received matching address byte. When DHEN bit of
SSPCON3 is set; CKP is cleared after the 8th falling
edge of SCL for received data.
Stretching after the 8th falling edge of SCL allows the
slave to look at the received address or data and
decide if it wants to ACK the received data.
27.4.8
CLOCK SYNCHRONIZATION AND
THE CKP BIT
Any time the CKP bit is cleared, the module will wait for
the SCL line to go low and then hold it. However,
clearing the CKP bit will not assert the SCL output low
until the SCL output is already sampled low. Therefore,
the CKP bit will not assert the SCL line until an external
I2C master device has already asserted the SCL line.
The SCL output will remain low until the CKP bit is set
and all other devices on the I2C bus have released
SCL. This ensures that a write to the CKP bit will not
violate the minimum high time requirement for SCL
(see Figure 27-15).
CLOCK SYNCHRONIZATION TIMING
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
SDA
DX
DX ‚ – 1
SCL
CKP
Master device
asserts clock
Master device
releases clock
WR
SSPCON1
 2013 Microchip Technology Inc.
DS22331A-page 165
MCP19111
27.4.9
GENERAL CALL ADDRESS
SUPPORT
In 10-bit Address mode, the UA bit will not be set on the
reception of the general call address. The slave will
prepare to receive the second byte as data, just as it
would in the 7-bit mode.
The addressing procedure for the I2C bus is such that
the first byte after the Start condition usually
determines which device will be the slave addressed by
the master device. The exception is the general call
address, which can address all devices. When this
address is used, all devices should, in theory, respond
with an acknowledge.
If the AHEN bit of the SSPCON3 register is set, just as
with any other address reception, the slave hardware
will stretch the clock after the 8th falling edge of SCL.
The slave must then set its ACKDT value and release
the clock with communication progressing as it would
normally.
The general call address is a reserved address in the
I2C protocol, defined as address 0x00. When the
GCEN bit of the SSPCON2 register is set, the slave
module will automatically ACK the reception of this
address, regardless of the value stored in SSPADDx.
After the slave clocks in an address of all zeros with the
R/W bit clear, an interrupt is generated and slave
software can read SSPBUF and respond. Figure 27-16
shows a general call reception sequence.
FIGURE 27-16:
SLAVE MODE GENERAL CALL ADDRESS SEQUENCE
Address is compared to General Call Address
after ACK, set interrupt
Receiving Data
ACK
R/W = 0
ACK D7 D6 D5 D4 D3 D2 D1 D0
General Call Address
SDA
SCL
S
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
SSPIF
BF (SSPSTAT<0>)
GCEN (SSPCON2<7>)
Cleared by software
SSPBUF is read
’1’
27.4.10
SSPMSKX REGISTER
An SSP Mask (SSPMSKx) register (Register 27-6 and
Register 27-8) is available in I2C Slave mode as a
mask for the value held in the SSPSRx register during
an address comparison operation. A zero (‘0’) bit in the
SSPMSKx register has the effect of making the
corresponding bit of the received address a “don’t
care”.
This register is reset to all ‘1’s upon any Reset
condition and, therefore, has no effect on standard
SSP operation until written with a mask value.
The SSP Mask register is active during:
• 7-bit Address mode: address compare of A<7:1>.
• 10-bit Address mode: address compare of A<7:0>
only. The SSP mask has no effect during the
reception of the first (high) byte of the address.
DS22331A-page 166
 2013 Microchip Technology Inc.
MCP19111
27.5
I2C Master Mode
27.5.1
I2C MASTER MODE OPERATION
Master mode is enabled by setting and clearing the
appropriate SSPM bits in the SSPCON1 register and
by setting the SSPEN bit. In Master mode, the SDA and
SCK pins must be configured as inputs. The MSSP
peripheral hardware will override the output driver TRIS
controls when necessary, to drive the pins low.
The master device generates all of the serial clock
pulses and the Start and Stop conditions. A transfer is
ended with a Stop condition or with a Repeated Start
condition. Since the Repeated Start condition is also
the beginning of the next serial transfer, the I2C bus will
not be released.
Master mode of operation is supported by interrupt
generation on the detection of the Start and Stop
conditions. The Stop (P) and Start (S) bits are cleared
from a Reset or when the MSSP module is disabled.
Control of the I 2C bus may be taken when the P bit is
set, or the bus is Idle.
In Master Transmitter mode, serial data is output
through SDA, while SCL outputs the serial clock. The
first byte transmitted contains the slave address of the
receiving device (7 bits) and the Read/Write (R/W) bit.
In this case, the R/W bit will be logic ‘0’. Serial data is
transmitted 8 bits at a time. After each byte is transmitted, an Acknowledge bit is received. Start and Stop
conditions are output to indicate the beginning and the
end of a serial transfer.
In Firmware Controlled Master mode, user code
conducts all I 2C bus operations based on Start and
Stop bit condition detection. Start and Stop condition
detection is the only active circuitry in this mode. All
other communication is done by the user software
directly manipulating the SDA and SCL lines.
The following events will cause the SSP Interrupt Flag
bit, SSPIF, to be set (SSP interrupt, if enabled):
•
•
•
•
•
Start condition detected
Stop condition detected
Data transfer byte transmitted/received
Acknowledge transmitted/received
Repeated Start generated
Note 1: The MSSP module, when configured in
I2C Master mode, does not allow
queueing of events. For instance, the
user is not allowed to initiate a Start
condition and immediately write the
SSPBUF register to initiate transmission
before the Start condition is complete. In
this case, the SSPBUF will not be written
to and the WCOL bit will be set, indicating
that a write to the SSPBUF did not occur.
2: When in Master mode, Start/Stop
detection is masked and an interrupt is
generated when the SEN/PEN bit is
cleared and the generation is complete.
 2013 Microchip Technology Inc.
In Master Receive mode, the first byte transmitted
contains the slave address of the transmitting device
(7 bits) and the R/W bit. In this case, the R/W bit will be
logic ‘1’. Thus, the first byte transmitted is a 7-bit slave
address followed by a ‘1’ to indicate the receive bit.
Serial data is received via SDA, while SCL outputs the
serial clock. Serial data is received 8 bits at a time. After
each byte is received, an Acknowledge bit is
transmitted. Start and Stop conditions indicate the
beginning and the end of transmission.
A Baud Rate Generator is used to set the clock
frequency output on SCL. See Section 27.6 “Baud
Rate Generator” for more detail.
27.5.2
CLOCK ARBITRATION
Clock arbitration occurs when the master, during any
receive, transmit or Repeated Start/Stop condition,
releases the SCL pin (SCL allowed to float high). When
the SCL pin is allowed to float high, the Baud Rate
Generator (BRG) is suspended from counting until the
SCL pin is actually sampled high. When the SCL pin is
sampled high, the Baud Rate Generator is reloaded
with the contents of SSPADD<7:0> and begins
counting. This ensures that the SCL high time will
always be at least one BRG rollover count in the event
that the clock is held low by an external device
(Figure 27-17).
DS22331A-page 167
MCP19111
FIGURE 27-17:
BAUD RATE GENERATOR TIMING WITH CLOCK ARBITRATION
SDA
DX
DX ‚ – 1
SCL allowed to transition high
SCL deasserted but slave holds
SCL low (clock arbitration)
SCL
BRG decrements on
Q2 and Q4 cycles
BRG
Value
03h
02h
01h
00h (hold off)
03h
02h
SCL is sampled high, reload takes
place and BRG starts its count
BRG
Reload
27.5.3
WCOL STATUS FLAG
If the user writes the SSPBUF when a Start, Restart,
Stop, Receive or Transmit sequence is in progress, the
WCOL is set and the contents of the buffer are
unchanged (the write does not occur). Any time the
WCOL bit is set, it indicates that an action on SSPBUF
was attempted while the module was not Idle.
Note:
27.5.4
Because queueing of events is not
allowed, writing to the lower 5 bits of
SSPCON2 is disabled until the Start
condition is complete.
I2C MASTER MODE START
CONDITION TIMING
To initiate a Start condition, the user sets the Start
Enable bit, SEN bit of the SSPCON2 register. If the
SDA and SCL pins are sampled high, the Baud Rate
Generator is reloaded with the contents of
SSPADD<7:0> and starts its count. If SCL and SDA
are both sampled high when the Baud Rate Generator
times out (TBRG), the SDA pin is driven low. The action
FIGURE 27-18:
of the SDA being driven low while SCL is high is the
Start condition and causes the S bit of the SSPSTAT1
register to be set. Following this, the Baud Rate
Generator is reloaded with the contents of
SSPADD<7:0> and resumes its count. When the Baud
Rate Generator times out (TBRG), the SEN bit of the
SSPCON2 register will be automatically cleared by
hardware; the Baud Rate Generator is suspended,
leaving the SDA line held low and the Start condition is
complete.
Note 1: If at the beginning of the Start condition,
the SDA and SCL pins are already sampled low, or if during the Start condition,
the SCL line is sampled low before the
SDA line is driven low, a bus collision
occurs, the Bus Collision Interrupt Flag,
BCLIF, is set, the Start condition is
aborted and the I2C module is reset into
its Idle state.
2: The Philips I2C Specification states that a
bus collision cannot occur on a Start.
FIRST START BIT TIMING
Write to SEN bit occurs here
Set S bit (SSPSTAT<3>)
At completion of Start bit,
hardware clears SEN bit
and sets SSPIF bit
SDA = 1,
SCL = 1
TBRG
TBRG
Write to SSPBUF occurs here
SDA
1st bit
2nd bit
TBRG
SCL
S
DS22331A-page 168
TBRG
 2013 Microchip Technology Inc.
MCP19111
27.5.5
I2C MASTER MODE REPEATED
START CONDITION TIMING
Note 1: If RSEN is programmed while any other
event is in progress, it will not take effect.
A Repeated Start condition occurs when the RSEN bit
of the SSPCON2 register is programmed high and the
Master state machine is no longer active. When the
RSEN bit is set, the SCL pin is asserted low. When the
SCL pin is sampled low, the Baud Rate Generator is
loaded and begins counting. The SDA pin is released
(brought high) for one Baud Rate Generator count
(TBRG). When the Baud Rate Generator times out, if
SDA is sampled high, the SCL pin will be deasserted
(brought high). When SCL is sampled high, the Baud
Rate Generator is reloaded and begins counting. SDA
and SCL must be sampled high for one TBRG. This
action is then followed by the assertion of the SDA pin
(SDA = 0) for one TBRG while SCL is high. SCL is
asserted low. Following this, the RSEN bit of the
SSPCON2 register will be automatically cleared and
the Baud Rate Generator will not be reloaded, leaving
the SDA pin held low. As soon as a Start condition is
detected on the SDA and SCL pins, the S bit of the
SSPSTAT register will be set. The SSPIF bit will not be
set until the Baud Rate Generator has timed out.
FIGURE 27-19:
2: A bus collision during the Repeated Start
condition occurs if:
•SDA is sampled low when SCL goes
from low-to-high.
•SCL goes low before SDA is
asserted low. This may indicate
that another master is attempting to
transmit a data ‘1’.
REPEAT START CONDITION WAVEFORM
S bit set by hardware
Write to SSPCON2
occurs here
SDA = 1,
SCL (no change)
At completion of Start bit,
hardware clears RSEN bit
and sets SSPIF
SDA = 1,
SCL = 1
TBRG
TBRG
TBRG
1st bit
SDA
Write to SSPBUF occurs here
TBRG
SCL
Sr
TBRG
Repeated Start
 2013 Microchip Technology Inc.
DS22331A-page 169
MCP19111
27.5.6
I2C MASTER MODE
TRANSMISSION
Transmission of a data byte, a 7-bit address or the
other half of a 10-bit address is accomplished by simply
writing a value to the SSPBUF register. This action will
set the Buffer Full flag bit, BF and will allow the Baud
Rate Generator to begin counting and start the next
transmission. Each bit of address/data will be shifted
out onto the SDA pin after the falling edge of SCL is
asserted. SCL is held low for one Baud Rate Generator
rollover count (TBRG). Data should be valid before SCL
is released high. When the SCL pin is released high, it
is held that way for TBRG. The data on the SDA pin must
remain stable for that duration and some hold time after
the next falling edge of SCL. After the 8th bit is shifted
out (the falling edge of the 8th clock), the BF flag is
cleared and the master releases the SDA. This allows
the slave device being addressed to respond with an
ACK bit during the 9th bit time if an address match
occurred, or if data was received properly. The status of
ACK is written into the ACKSTAT bit on the rising edge
of the 9th clock. If the master receives an Acknowledge,
the Acknowledge Status bit, ACKSTAT, is cleared. If
not, the bit is set. After the 9th clock, the SSPIF bit is set
and the master clock (Baud Rate Generator) is
suspended until the next data byte is loaded into the
SSPBUF, leaving SCL low and SDA unchanged
(Figure 27-20).
After the write to the SSPBUF, each bit of the address
will be shifted out on the falling edge of SCL until all
seven address bits and the R/W bit are completed. On
the falling edge of the 8th clock, the master will release
the SDA pin, allowing the slave to respond with an
Acknowledge. On the falling edge of the 9th clock, the
master will sample the SDA pin to see if the address
was recognized by a slave. The status of the ACK bit is
loaded into the ACKSTAT Status bit of the SSPCON2
register. Following the falling edge of the 9th clock
transmission of the address, the SSPIF is set, the BF
flag is cleared and the Baud Rate Generator is turned
off until another write to the SSPBUF takes place,
holding SCL low and allowing SDA to float.
27.5.6.1
BF Status Flag
In Transmit mode, the BF bit of the SSPSTAT register
is set when the CPU writes to SSPBUF, and is cleared
when all 8 bits are shifted out.
27.5.6.2
If the user writes the SSPBUF when a transmit is
already in progress (i.e., SSPSR is still shifting out a
data byte), the WCOL is set and the contents of the
buffer are unchanged (the write does not occur).
WCOL must be cleared by software before the next
transmission.
27.5.6.3
ACKSTAT Status Flag
In Transmit mode, the ACKSTAT bit of the SSPCON2
register is cleared when the slave has sent an
Acknowledge (ACK = 0) and is set when the slave
does not Acknowledge (ACK = 1). A slave sends an
Acknowledge when it has recognized its address
(including a general call), or when the slave has
properly received its data.
27.5.6.4
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
DS22331A-page 170
WCOL Status Flag
Typical transmit sequence
The user generates a Start condition by setting
the SEN bit of the SSPCON2 register.
SSPIF is set by hardware on completion of the
Start.
SSPIF is cleared by software.
The MSSP module will wait the required start
time before any other operation takes place.
The user loads the SSPBUF with the slave
address to transmit.
Address is shifted out the SDA pin until all 8 bits
are transmitted. Transmission begins as soon
as SSPBUF is written to.
The MSSP module shifts in the ACK bit from the
slave device and writes its value into the
ACKSTAT bit of the SSPCON2 register.
The MSSP module generates an interrupt at the
end of the 9th clock cycle by setting the SSPIF
bit.
The user loads the SSPBUF with eight bits of
data.
Data is shifted out the SDA pin until all 8 bits are
transmitted.
The MSSP module shifts in the ACK bit from the
slave device and writes its value into the
ACKSTAT bit of the SSPCON2 register.
Steps 8–11 are repeated for all transmitted data
bytes.
The user generates a Stop or Restart condition
by setting the PEN or RSEN bits of the
SSPCON2 register. Interrupt is generated once
the Stop/Restart condition is complete.
 2013 Microchip Technology Inc.
 2013 Microchip Technology Inc.
FIGURE 27-20:
I2C MASTER MODE WAVEFORM (TRANSMISSION, 7 OR 10-BIT ADDRESS)
Write SSPCON2<0> SEN = 1
Start condition begins
ACKSTAT in
SSPCON2 = 1
From slave, clear ACKSTAT bit SSPCON2<6>
SEN = 0
Transmit Address to Slave
SDA
A7
A6
A5
A4
A3
A2
Transmitting Data or Second Half
of 10-bit Address
R/W = 0
ACK = 0
A1
D7
ACK
D6
D5
D4
D3
D2
D1
D0
2
3
4
5
6
7
8
SSPBUF written with 7-bit address and R/W
start transmit
SCL
S
1
2
3
4
5
6
7
8
9
1
SCL held low
while CPU
responds to SSPIF
9
P
SSPIF
Cleared by software
Cleared by software service routine
from SSP interrupt
Cleared by software
BF (SSPSTAT<0>)
SSPBUF written
SSPBUF is written by software
SEN
After Start condition, SEN cleared by hardware
PEN
DS22331A-page 171
MCP19111
R/W
MCP19111
27.5.7
I2C MASTER MODE RECEPTION
Master mode reception is enabled by programming the
Receive Enable bit, RCEN bit of the SSPCON2
register.
Note:
The MSSP module must be in an Idle
state before the RCEN bit is set, or the
RCEN bit will be disregarded.
The Baud Rate Generator begins counting and on each
rollover, the state of the SCL pin changes (high-tolow/low-to-high) and data is shifted into the SSPSR.
After the falling edge of the eighth clock, the receive
enable flag is automatically cleared, the contents of the
SSPSR are loaded into the SSPBUF, the BF flag bit is
set, the SSPIF flag bit is set and the Baud Rate Generator is suspended from counting, holding SCL low. The
MSSP is now in Idle state awaiting the next command.
When the buffer is read by the CPU, the BF flag bit is
automatically cleared. The user can then send an
Acknowledge bit at the end of reception by setting the
Acknowledge Sequence Enable, ACKEN bit of the
SSPCON2 register.
27.5.7.1
BF Status Flag
In receive operation, the BF bit is set when an address
or data byte is loaded into SSPBUF from SSPSR. It is
cleared when the SSPBUF register is read.
27.5.7.2
SSPOV Status Flag
27.5.7.4
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
In receive operation, the SSPOV bit is set when 8 bits
are received into the SSPSR and the BF flag bit is
already set from a previous reception.
13.
14.
27.5.7.3
15.
WCOL Status Flag
If the user writes the SSPBUF when a receive is
already in progress (i.e., SSPSR is still shifting in a data
byte), the WCOL bit is set and the contents of the buffer
are unchanged (the write does not occur).
DS22331A-page 172
Typical Receive Sequence:
The user generates a Start condition by setting
the SEN bit of the SSPCON2 register.
SSPIF is set by hardware on completion of the
Start.
SSPIF is cleared by software.
The user writes SSPBUF with the slave address
to transmit and the R/W bit set.
Address is shifted out the SDA pin until all 8 bits
are transmitted. Transmission begins as soon
as SSPBUF is written to.
The MSSP module shifts in the ACK bit from the
slave device and writes its value into the
ACKSTAT bit of the SSPCON2 register.
The MSSP module generates an interrupt at the
end of the 9th clock cycle by setting the SSPIF
bit.
User sets the RCEN bit of the SSPCON2 register
and the Master clocks in a byte from the slave.
After the 8th falling edge of SCL, SSPIF and BF
are set.
Master clears SSPIF and reads the received
byte from SSPUF, clears BF.
Master sets ACK value sent to slave in ACKDT
bit of the SSPCON2 register and initiates the
ACK by setting the ACKEN bit.
Masters ACK is clocked out to the Slave and
SSPIF is set.
The user clears SSPIF.
Steps 8–13 are repeated for each received byte
from the slave.
Master sends a not ACK or Stop to end
communication.
 2013 Microchip Technology Inc.
 2013 Microchip Technology Inc.
I2C MASTER MODE WAVEFORM (RECEPTION, 7-BIT ADDRESS)
FIGURE 27-21:
Write to SSPCON2<4>
to start Acknowledge sequence
SDA = ACKDT (SSPCON2<5>) = 0
Write to SSPCON2<0> (SEN = 1),
begin Start condition
SEN = 0
Write to SSPBUF occurs here,
start XMIT
Transmit Address to Slave
ACK
PEN bit = 1
written here
RCEN cleared
automatically
Receiving Data from Slave
Receiving Data from Slave
A7 A6 A5 A4 A3 A2 A1 R/W
SDA
RCEN = 1, start
next receive
RCEN cleared
automatically
ACK from Slave
Set ACKEN, start Acknowledge sequence
SDA = ACKDT = 1
ACK from Master
SDA = ACKDT = 0
Master configured as a receiver
by programming SSPCON2<3> (RCEN = 1)
D7 D6 D5 D4 D3 D2 D1
ACK
D0
D7 D6 D5 D4 D3 D2 D1
D0
ACK
Bus master
terminates
transfer
ACK is not sent
SCL
S
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
Data shifted in on falling edge of CLK
Set SSPIF interrupt
at end of receive
Cleared by software
Cleared by software
Cleared by software
BF
(SSPSTAT<0>)
9
P
Set SSPIF at end
of receive
Set SSPIF interrupt
at end of Acknowledge
sequence
SSPIF
SDA = 0, SCLx = 1
while CPU
responds to SSPxIF
8
Cleared by software
Cleared in
software
Set SSPIF interrupt
at end of Acknowledge sequence
Set P bit
(SSPSTAT<4>)
and SSPIF
Last bit is shifted into SSPSR and
contents are unloaded into SSPBUF
SSPOV
SSPOV is set because
SSPBUF is still full
ACKEN
DS22331A-page 173
Master configured as a receiver
by programming SSPCON2<3> (RCEN = 1)
RCEN cleared
automatically
ACK from Master
SDA = ACKDT = 0
RCEN cleared
automatically
MCP19111
RCEN
MCP19111
27.5.8
ACKNOWLEDGE SEQUENCE
TIMING
27.5.9
A Stop bit is asserted on the SDA pin at the end of a
receive/transmit by setting the Stop Sequence Enable
bit, PEN bit of the SSPCON2 register. At the end of a
receive/transmit, the SCL line is held low after the
falling edge of the 9th clock. When the PEN bit is set,
the master will assert the SDA line low. When the SDA
line is sampled low, the Baud Rate Generator is
reloaded and counts down to ‘0’. When the Baud Rate
Generator times out, the SCL pin will be brought high
and one TBRG (Baud Rate Generator rollover count)
later, the SDA pin will be deasserted. When the SDA
pin is sampled high while SCL is high, the P bit of the
SSPSTAT register is set. A TBRG later, the PEN bit is
cleared and the SSPIF bit is set (Figure 27-23).
An Acknowledge sequence is enabled by setting the
Acknowledge Sequence Enable bit, ACKEN bit of the
SSPCON2 register. When this bit is set, the SCL pin is
pulled low and the contents of the Acknowledge data bit
are presented on the SDA pin. If the user wishes to generate an Acknowledge, then the ACKDT bit should be
cleared. If not, the user should set the ACKDT bit before
starting an Acknowledge sequence. The Baud Rate
Generator then counts for one rollover period (TBRG)
and the SCL pin is deasserted (pulled high). When the
SCL pin is sampled high (clock arbitration), the Baud
Rate Generator counts for TBRG. The SCL pin is then
pulled low. Following this, the ACKEN bit is automatically
cleared, the Baud Rate Generator is turned off and the
MSSP module then goes into Idle mode (Figure 27-22).
27.5.8.1
27.5.9.1
WCOL Status Flag
If the user writes the SSPBUF when a Stop sequence
is in progress, then the WCOL bit is set and the
contents of the buffer are unchanged (the write does
not occur).
WCOL Status Flag
If the user writes the SSPBUF when an Acknowledge
sequence is in progress, then WCOL is set and the
contents of the buffer are unchanged (the write does
not occur).
FIGURE 27-22:
STOP CONDITION TIMING
ACKNOWLEDGE SEQUENCE WAVEFORM
Acknowledge sequence starts here,
write to SSPCON2
ACKEN = 1, ACKDT = 0
SDA
D0
SCL
ACKEN automatically cleared
TBRG
TBRG
ACK
8
9
SSPIF
SSPIF set at
the end of receive
Note:
FIGURE 27-23:
TBRG = one Baud Rate Generator period.
SCL = 1 for TBRG, followed by SDA = 1 for TBRG
after SDA sampled high. P bit (SSPSTAT<4>) is set.
PEN bit (SSPCON2<2>) is cleared by
hardware and the SSPIF bit is set
TBRG
SCL
ACK
TBRG
Note:
Cleared in
software
SSPIF set at the end
of Acknowledge sequence
STOP CONDITION RECEIVE OR TRANSMIT MODE
Write to SSPCON2,
set PEN
Falling edge of
9th clock
SDA
Cleared in
software
P
TBRG
TBRG
SCL brought high after TBRG
SDA asserted low before rising edge of clock
to setup Stop condition
TBRG = one Baud Rate Generator period.
DS22331A-page 174
 2013 Microchip Technology Inc.
MCP19111
27.5.10
SLEEP OPERATION
27.5.13
2
While in Sleep mode, the I C slave module can receive
addresses or data, and when an address match or
complete byte transfer occurs, wakes the processor
from Sleep (if the MSSP interrupt is enabled).
27.5.11
EFFECTS OF A RESET
A Reset disables the MSSP module and terminates the
current transfer.
27.5.12
MULTI-MASTER MODE
In Multi-Master mode, the interrupt generation on the
detection of the Start and Stop conditions allows the
determination of when the bus is free. The Stop (P) and
Start (S) bits are cleared from a Reset or when the
MSSPx module is disabled. Control of the I 2C bus may
be taken when the P bit of the SSPSTAT register is set,
or the bus is Idle, with both the S and P bits clear. When
the bus is busy, enabling the SSP interrupt will
generate the interrupt when the Stop condition occurs.
In multi-master operation, the SDA line must be
monitored for arbitration to see if the signal level is the
expected output level. This check is performed by
hardware with the result placed in the BCLIF bit.
The states where arbitration can be lost are:
•
•
•
•
•
Address Transfer
Data Transfer
A Start Condition
A Repeated Start Condition
An Acknowledge Condition
MULTI-MASTER COMMUNICATION,
BUS COLLISION AND BUS
ARBITRATION
Multi-Master mode support is achieved by bus
arbitration. When the master outputs address/data bits
onto the SDA pin, arbitration takes place when the
master outputs a ‘1’ on SDA, by letting SDA float high
and another master asserts a ‘0’. When the SCL pin
floats high, data should be stable. If the expected data
on SDA is a ‘1’ and the data sampled on the SDA pin is
‘0’, then a bus collision has taken place. The master will
set the Bus Collision Interrupt Flag, BCLIF and reset
the I2C port to its Idle state (Figure 27-24).
If a transmit was in progress when the bus collision
occurred, the transmission is halted, the BF flag is
cleared, the SDA and SCL lines are deasserted and the
SSPBUF can be written to. When the user services the
bus collision Interrupt Service Routine and if the I2C
bus is free, the user can resume communication by
asserting a Start condition.
If a Start, Repeated Start, Stop or Acknowledge
condition was in progress when the bus collision
occurred, the condition is aborted, the SDA and SCL
lines are deasserted and the respective control bits in
the SSPCON2 register are cleared. When the user
services the bus collision Interrupt Service Routine and
if the I2C bus is free, the user can resume
communication by asserting a Start condition.
The master will continue to monitor the SDA and SCL
pins. If a Stop condition occurs, the SSPIF bit will be set.
A write to the SSPBUF will start the transmission of
data at the first data bit, regardless of where the
transmitter left off when the bus collision occurred.
In Multi-Master mode, the interrupt generation on the
detection of Start and Stop conditions allows the determination of when the bus is free. Control of the I2C bus
can be taken when the P bit is set in the SSPSTAT
register, or the bus is Idle and the S and P bits are
cleared.
FIGURE 27-24:
BUS COLLISION TIMING FOR TRANSMIT AND ACKNOWLEDGE
Data changes
while SCL = 0
SDA line pulled low
by another source
SDA released
by master
Sample SDA. While SCL is high,
data does not match what is driven
by the master.
Bus collision has occurred.
SDA
SCL
Set bus collision
interrupt (BCLIF)
BCLIF
 2013 Microchip Technology Inc.
DS22331A-page 175
MCP19111
27.5.13.1
Bus Collision During a Start
Condition
During a Start condition, a bus collision occurs if:
a)
SDA or SCL are sampled low at the beginning of
the Start condition (Figure 27-25).
SCL is sampled low before SDA is asserted low
(Figure 27-26).
b)
During a Start condition, both the SDA and the SCL
pins are monitored.
If the SDA pin is sampled low during this count, the
BRG is reset and the SDA line is asserted early
(Figure 27-27). If, however, a ‘1’ is sampled on the SDA
pin, the SDA pin is asserted low at the end of the BRG
count. The Baud Rate Generator is then reloaded and
counts down to zero; if the SCL pin is sampled as ‘0’
during this time, a bus collision does not occur. At the
end of the BRG count, the SCL pin is asserted low.
Note:
If the SDA pin is already low, or the SCL pin is already
low, then all of the following occur:
• the Start condition is aborted
• the BCLIF flag is set
• the MSSP module is reset to its Idle state
(Figure 27-25).
The Start condition begins with the SDA and SCL pins
deasserted. When the SDA pin is sampled high, the
Baud Rate Generator is loaded and counts down. If the
SCL pin is sampled low while SDA is high, a bus
collision occurs because it is assumed that another
master is attempting to drive a data ‘1’ during the Start
condition.
FIGURE 27-25:
The reason that bus collision is not a
factor during a Start condition is that no
two bus masters can assert a Start
condition at the exact same time.
Therefore, one master will always assert
SDA before the other. This condition does
not cause a bus collision because the two
masters must be allowed to arbitrate the
first address following the Start condition.
If the address is the same, arbitration
must be allowed to continue into the data
portion, Repeated Start or Stop
conditions.
BUS COLLISION DURING START CONDITION (SDA ONLY)
SDA goes low before the SEN bit is set.
Set BCLIF,
S bit and SSPIF set because
SDA = 0, SCL = 1.
SDA
SCL
Set SEN, enable Start
condition if SDA = 1, SCL = 1
SEN cleared automatically because of bus collision.
SSP module reset into Idle state.
SEN
BCLIF
SDA sampled low before
Start condition. Set BCLIF.
S bit and SSPIF set because
SDA = 0, SCL = 1.
SSPIF and BCLIF are
cleared by software
S
SSPIF
SSPIF and BCLIF are
cleared by software
DS22331A-page 176
 2013 Microchip Technology Inc.
MCP19111
FIGURE 27-26:
BUS COLLISION DURING START CONDITION (SCL = 0)
SDA = 0, SCL = 1
TBRG
TBRG
SDA
SCL
Set SEN, enable Start
sequence if SDA = 1, SCL = 1
SCL = 0 before SDA = 0,
bus collision occurs. Set BCLIF.
SEN
SCL = 0 before BRG time-out,
bus collision occurs. Set BCLIF.
BCLIF
S
’0’
SSPIF
’0’
FIGURE 27-27:
Interrupt cleared
by software
’0’
’0’
BRG RESET DUE TO SDA ARBITRATION DURING START CONDITION
SDA = 0, SCL = 1
Set S
Less than TBRG
Set SSPIF
TBRG
SDA SDA pulled low by other master.
Reset BRG and assert SDAx.
SCL
S
SCLx pulled low after BRG
time-out
SEN
BCLIF
Set SEN, enable Start
sequence if SDA = 1, SCL = 1
’0’
S
SSPIF
SDAx = 0, SCL = 1,
set SSPIF
 2013 Microchip Technology Inc.
Interrupts cleared
by software
DS22331A-page 177
MCP19111
27.5.13.2
Bus Collision During a Repeated
Start Condition
If SDA is low, a bus collision has occurred (i.e., another
master is attempting to transmit a data ‘0’, Figure 27-28).
If SDA is sampled high, the BRG is reloaded and begins
counting. If SDA goes from high-to-low before the BRG
times out, no bus collision occurs because no two
masters can assert SDA at exactly the same time.
During a Repeated Start condition, a bus collision
occurs if:
a)
b)
A low level is sampled on SDA when SCL goes
from low level to high level.
SCL goes low before SDA is asserted low,
indicating that another master is attempting to
transmit a data ‘1’.
If SCL goes from high-to-low before the BRG times out
and SDA has not already been asserted, a bus collision
occurs. In this case, another master is attempting to
transmit a data ‘1’ during the Repeated Start condition
(see Figure 27-29.)
When the user releases SDA and the pin is allowed to
float high, the BRG is loaded with SSPADD and counts
down to zero. The SCL pin is then deasserted and
when sampled high, the SDA pin is sampled.
FIGURE 27-28:
If, at the end of the BRG time-out, both SCL and SDA
are still high, the SDA pin is driven low and the BRG is
reloaded and begins counting. At the end of the count,
regardless of the status of the SCL pin, the SCL pin is
driven low and the Repeated Start condition is
complete.
BUS COLLISION DURING A REPEATED START CONDITION (CASE 1)
SDA
SCL
Sample SDA when SCL goes high.
If SDA = 0, set BCLIF and release SDA and SCL.
RSEN
BCLIF
Cleared by software
’0’
S
’0’
SSPIF
FIGURE 27-29:
BUS COLLISION DURING REPEATED START CONDITION (CASE 2)
TBRG
TBRG
SDA
SCL
BCLIF
SCL goes low before SDA,
set BCLIF. Release SDA and SCL.
Interrupt cleared
by software
RSEN
S
’0’
SSPIF
DS22331A-page 178
 2013 Microchip Technology Inc.
MCP19111
27.5.13.3
Bus Collision During a Stop
Condition
The Stop condition begins with SDA asserted low.
When SDA is sampled low, the SCL pin is allowed to
float. When the pin is sampled high (clock arbitration),
the Baud Rate Generator is loaded with SSPADD and
counts down to 0. After the BRG times out, SDA is
sampled. If SDA is sampled low, a bus collision has
occurred. This is due to another master attempting to
drive a data ‘0’ (Figure 27-30). If the SCL pin is sampled
low before SDA is allowed to float high, a bus collision
occurs. This is another case of another master
attempting to drive a data ‘0’ (Figure 27-31).
Bus collision occurs during a Stop condition if:
a)
b)
After the SDA pin has been deasserted and
allowed to float high, SDA is sampled low after
the BRG has timed out.
After the SCL pin is deasserted, SCL is sampled
low before SDA goes high.
FIGURE 27-30:
BUS COLLISION DURING A STOP CONDITION (CASE 1)
TBRG
TBRG
TBRG
SDA sampled
low after TBRG,
set BCLIF
SDA
SCL
SDA asserted low
PEN
BCLIF
P
’0’
SSPIF
’0’
FIGURE 27-31:
BUS COLLISION DURING A STOP CONDITION (CASE 2)
TBRG
SDA
SCL
Assert SDA
TBRG
TBRG
SCL goes low before SDA goes high,
set BCLIF
PEN
BCLIF
P
’0’
SSPIF
’0’
 2013 Microchip Technology Inc.
DS22331A-page 179
MCP19111
TABLE 27-1:
SUMMARY OF REGISTERS ASSOCIATED WITH I2C OPERATION
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reset
Values on
Page:
INTCON
GIE
PEIE
T0IE
INTE
IOCE
T0IF
INTF
IOCF
93
PIE1
—
ADIE
BCLIE
SSPIE
—
—
TMR2IE
TMR1IE
94
PIR1
—
ADIF
BCLIF
SSPIF
—
—
TMR2IF
TMR1IF
96
TRISGPA
TRISA7
TRISA6
TRISA5
TRISA4
TRISA3
TRISA2
TRISA1
TRISA0
112
TRISGPB
TRISB7
TRISB6
TRISB5
TRISB4
TRISB3
TRISB2
TRISB1
TRISB0
115
SSPADD
ADD7
ADD6
ADD5
ADD4
ADD3
ADD2
ADD1
ADD0
186
WCOL
SSPOV
SSPEN
CKP
SSPCON2
GCEN
ACKSTAT
ACKDT
ACKEN
RCEN
PEN
SSPCON3
ACKTIM
PCIE
SCIE
BOEN
SDAHT
SBCDE
SSPMSK
MSK7
MSK6
MSK5
MSK4
MSK3
MSK2
SSPSTAT
SMP
CKE
D/A
P
S
R/W
SSPMSK2
MSK27
MSK26
MSK25
MSK24
MSK23
SSPADD2
ADD27
ADD26
ADD25
ADD24
ADD23
SSPBUF
SSPCON1
Synchronous Serial Port Receive Buffer/Transmit Register
SSPM3
SSPM2
SSPM1
146*
SSPM0
183
RSEN
SEN
184
AHEN
DHEN
185
MSK1
MSK0
186
UA
BF
182
MSK22
MSK21
MSK20
187
ADD22
ADD21
ADD20
187
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by the MSSP module in I2C mode.
* Page provides register information.
DS22331A-page 180
 2013 Microchip Technology Inc.
MCP19111
27.6
BAUD RATE GENERATOR
The MSSP module has a Baud Rate Generator
available for clock generation in I2C Master mode. The
Baud Rate Generator (BRG) reload value is placed in
the SSPADD register (Register 27-7). When a write
occurs to SSPBUF, the Baud Rate Generator will
automatically begin counting down.
Once the given operation is complete, the internal clock
will automatically stop counting and the clock pin will
remain in its last state.
An internal signal “Reload” in Figure 27-32 triggers the
value from SSPADD to be loaded into the BRG counter.
This occurs twice for each oscillation of the module
clock line. The logic dictating when the reload signal is
asserted depends on the mode the MSSP is being
operated in.
Table 27-2 demonstrates clock rates based on
instruction cycles and the BRG value loaded into
SSPADD.
EQUATION 27-1:
F
FIGURE 27-32:
F
OSC
= ---------------------------------------------CLOCK
 SSPADD + 1   4 
BAUD RATE GENERATOR BLOCK DIAGRAM
SSPM<3:0>
SSPM<3:0>
SCL
Reload
Control
SSPCLK
SSPADD<7:0>
Reload
BRG Down Counter
FOSC/2
Note: Values of 0x00, 0x01 and 0x02 are not valid
for SSPADD when used as a Baud Rate
Generator for I2C. This is an implementation
limitation.
TABLE 27-2:
Note 1:
MSSP CLOCK RATE W/BRG
FOSC
FCY
BRG Value
FCLOCK
(2 Rollovers of BRG)
8 MHz
2 MHz
04h
400 kHz(1)
8 MHz
2 MHz
0Bh
166 kHz
8 MHz
2 MHz
13h
100 kHz
The I2C interface does not conform to the 400 kHz I2C specification (which applies to rates greater than
100 kHz) in all details, but may be used with care where higher rates are required by the application.
 2013 Microchip Technology Inc.
DS22331A-page 181
MCP19111
REGISTER 27-2:
SSPSTAT: SSP STATUS REGISTER
R/W-0
R/W-0
R-0
R-0
R-0
R-0
R-0
R-0
SMP
CKE
D/A
P
S
R/W
UA
BF
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
SMP: Data Input Sample bit
1 = Slew rate control disabled for standard speed mode (100 kHz and 1 MHz)
0 = Slew rate control enabled for high speed mode (400 kHz)
bit 6
CKE: Clock Edge Select bit
1 = Enable input logic so that thresholds are compliant with SMBus specification
0 = Disable SMBus specific inputs
bit 5
D/A: Data/Address bit
1 = Indicates that the last byte received or transmitted was data
0 = Indicates that the last byte received or transmitted was address
bit 4
P: Stop bit
(This bit is cleared when the MSSP module is disabled, SSPEN is cleared.)
1 = Indicates that a Stop bit has been detected last (this bit is ‘0’ on Reset)
0 = Stop bit was not detected last
bit 3
S: Start bit
(This bit is cleared when the MSSP module is disabled, SSPEN is cleared.)
1 = Indicates that a Start bit has been detected last (this bit is ‘0’ on Reset)
0 = Start bit was not detected last
bit 2
R/W: Read/Write bit information
This bit holds the R/W bit information following the last address match. This bit is only valid from the
address match to the next Start bit, Stop bit, or not ACK bit.
In I2 C Slave mode:
1 = Read
0 = Write
In I2 C Master mode:
1 = Transmit is in progress
0 = Transmit is not in progress
OR-ing this bit with SEN, RSEN, PEN, RCEN or ACKEN will indicate if the MSSP is in Idle mode.
bit 1
UA: Update Address bit (10-bit I2C mode only)
1 = Indicates that the user needs to update the address in the SSPADD register
0 = Address does not need to be updated
bit 0
BF: Buffer Full Status bit
Receive:
1 = Receive complete, SSPBUF is full
0 = Receive not complete, SSPBUF is empty
Transmit:
1 = Data transmit in progress (does not include the ACK and Stop bits), SSPBUF is full
0 = Data transmit complete (does not include the ACK and Stop bits), SSPBUF is empty
DS22331A-page 182
 2013 Microchip Technology Inc.
MCP19111
REGISTER 27-3:
SSPCON1: SSP CONTROL REGISTER 1
R/C/HS-0
R/C/HS-0
R/W-0
R/W-0
WCOL
SSPOV
SSPEN
CKP
R/W-0
R/W-0
R/W-0
R/W-0
SSPM<3:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
WCOL: Write Collision Detect bit
Master mode:
1 = A write to the SSPBUF register was attempted while the I2C conditions were not valid for a
transmission to be started
0 = No collision
Slave mode:
1 = The SSPBUF register is written while it is still transmitting the previous word (must be cleared in software)
0 = No collision
bit 6
SSPOV: Receive Overflow Indicator bit (1)
1 = A byte is received while the SSPBUF register is still holding the previous byte. SSPOV is a “don’t
care” in Transmit mode (must be cleared in software).
0 = No overflow
bit 5
SSPEN: Synchronous Serial Port Enable bit
In both modes, when enabled, these pins must be properly configured as input or output
1 = Enables the serial port and configures the SDA and SCL pins as the source of the serial port pins (2)
0 = Disables serial port and configures these pins as I/O port pins
bit 4
CKP: Clock Polarity Select bit
In I2 C Slave mode:
SCL release control
1 = Enable clock
0 = Holds clock low (clock stretch). (Used to ensure data setup time.)
In I2 C Master mode:
Unused in this mode
bit 3-0
SSPM<3:0>: Synchronous Serial Port Mode Select bits
0000 = Reserved
0001 = Reserved
0010 = Reserved
0011 = Reserved
0100 = Reserved
0101 = Reserved
0110 = I2C Slave mode, 7-bit address
0111 = I2C Slave mode, 10-bit address
1000 = I2C Master mode, clock = FOSC/(4 x (SSPADD+1))(3)
1001 = Reserved
1010 = Reserved
1011 = I2C firmware controlled Master mode (Slave idle)
1100 = Reserved
1101 = Reserved
1110 = I2C Slave mode, 7-bit address with Start and Stop bit interrupts enabled
1111 = I2C Slave mode, 10-bit address with Start and Stop bit interrupts enabled
Note 1:
2:
3:
In Master mode, the overflow bit is not set since each new reception (and transmission) is initiated by
writing to the SSPBUF register.
When enabled, the SDA and SCL pins must be configured as inputs.
SSPADD values of 0, 1 or 2 are not supported for I2C Mode.
 2013 Microchip Technology Inc.
DS22331A-page 183
MCP19111
REGISTER 27-4:
SSPCON2: SSP CONTROL REGISTER 2
R/W-0/0
R-0/0
R/W-0/0
R/S/HS-0/0
R/S/HS-0/0
R/S/HS-0/0
R/S/HS-0/0
R/W/HS-0/0
GCEN
ACKSTAT
ACKDT
ACKEN
RCEN
PEN
RSEN
SEN
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
GCEN: General Call Enable bit (in I2C Slave mode only)
1 = Enable interrupt when a general call address (0x00 or 00h) is received in the SSPSR
0 = General call address disabled
bit 6
ACKSTAT: Acknowledge Status bit (in I2C mode only)
1 = Acknowledge was not received
0 = Acknowledge was received
bit 5
ACKDT: Acknowledge Data bit (in I2C mode only)
In Receive mode:
Value transmitted when the user initiates an Acknowledge sequence at the end of a receive
1 = Not Acknowledge
0 = Acknowledge
bit 4
ACKEN: Acknowledge Sequence Enable bit (in I2C Master mode only)
In Master Receive mode:
1 = Initiate Acknowledge sequence on SDA and SCL pins, and transmit ACKDT data bit.
Automatically cleared by hardware.
0 = Acknowledge sequence Idle
bit 3
RCEN: Receive Enable bit (in I2C Master mode only)
1 = Enables Receive mode for I2C
0 = Receive Idle
bit 2
PEN: Stop Condition Enable bit (in I2C Master mode only)
SCK Release Control:
1 = Initiate Stop condition on SDA and SCL pins. Automatically cleared by hardware.
0 = Stop condition Idle
bit 1
RSEN: Repeated Start Condition Enabled bit (in I2C Master mode only)
1 = Initiate Repeated Start condition on SDA and SCL pins. Automatically cleared by hardware.
0 = Repeated Start condition Idle
bit 0
SEN: Start Condition Enabled bit (in I2C Master mode only)
In Master mode:
1 = Initiate Start condition on SDA and SCL pins. Automatically cleared by hardware.
0 = Start condition Idle
In Slave mode:
1 = Clock stretching is enabled for both slave transmit and slave receive (stretch enabled)
0 = Clock stretching is disabled
Note 1:
For bits ACKEN, RCEN, PEN, RSEN, SEN: If the I2C module is not in the Idle mode, this bit may not be
set (no spooling) and the SSPBUF may not be written (or writes to the SSPBUF are disabled).
DS22331A-page 184
 2013 Microchip Technology Inc.
MCP19111
REGISTER 27-5:
SSPCON3: SSP CONTROL REGISTER 3
R-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
ACKTIM
PCIE
SCIE
BOEN
SDAHT
SBCDE
AHEN
DHEN
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
ACKTIM: Acknowledge Time Status bit (I2C mode only)(2)
1 = Indicates the I2C bus is in an Acknowledge sequence, set on the 8th falling edge of SCL clock
0 = Not an Acknowledge sequence, cleared on the 9th rising edge of SCL clock
bit 6
PCIE: Stop Condition Interrupt Enable bit (I2C mode only)
1 = Enable interrupt on detection of Stop condition
0 = Stop detection interrupts are disabled(1)
bit 5
SCIE: Start Condition Interrupt Enable bit (I2C mode only)
1 = Enable interrupt on detection of Start or Restart conditions
0 = Start detection interrupts are disabled(1)
bit 4
BOEN: Buffer Overwrite Enable bit
In I2C Master mode:
This bit is ignored.
In I2C Slave mode:
1 = SSPBUF is updated and ACK is generated for a received address/data byte, ignoring the state
of the SSPOV bit only if the BF bit = 0.
0 = SSPBUF is only updated when SSPOV is clear
bit 3
SDAHT: SDA Hold Time Selection bit
1 = Minimum of 300 ns hold time on SDA after the falling edge of SCL
0 = Minimum of 100 ns hold time on SDA after the falling edge of SCL
bit 2
SBCDE: Slave Mode Bus Collision Detect Enable bit (I2C Slave mode only)
If on the rising edge of SCL, SDA is sampled low when the module is outputting a high state, the BCLIF
bit of the PIR2 register is set, and bus goes Idle
1 = Enable slave bus collision interrupts
0 = Slave bus collision interrupts are disabled
bit 1
AHEN: Address Hold Enable bit (I2C Slave mode only)
1 = Following the 8th falling edge of SCL for a matching received address byte; CKP bit of the
SSPCON1 register will be cleared and the SCL will be held low.
0 = Address holding is disabled
bit 0
DHEN: Data Hold Enable bit (I2C Slave mode only)
1 = Following the 8th falling edge of SCL for a received data byte; slave hardware clears the CKP bit
of the SSPCON1 register and SCL is held low.
0 = Data holding is disabled
Note 1:
2:
This bit has no effect in Slave modes that Start and Stop condition detection is explicitly listed as enabled.
The ACKTIM Status bit is only active when the AHEN bit or DHEN bit is set.
 2013 Microchip Technology Inc.
DS22331A-page 185
MCP19111
REGISTER 27-6:
SSPMSK: SSP MASK REGISTER 1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
MSK<7:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-1
MSK<7:1>: Mask bits
1 = The received address bit n is compared to SSPADD<n> to detect I2C address match
0 = The received address bit n is not used to detect I2C address match
bit 0
MSK<0>: Mask bit for I2C Slave mode, 10-bit Address
I2C Slave mode, 10-bit address (SSPM<3:0> = 0111 or 1111):
1 = The received address bit 0 is compared to SSPADD<0> to detect I2C address match
0 = The received address bit 0 is not used to detect I2C address match
I2C Slave mode, 7-bit address, the bit is ignored
REGISTER 27-7:
R/W-0
SSPADD: MSSP ADDRESS AND BAUD RATE REGISTER 1
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
ADD<7:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
Master mode:
bit 7-0
ADD<7:0>: Baud Rate Clock Divider bits
SCL pin clock period = ((ADD<7:0> + 1) x 4)/FOSC
10-Bit Slave mode — Most Significant Address byte:
bit 7-3
Not used: Unused for Most Significant Address byte. Bit state of this register is a “don’t care”. Bit
pattern sent by master is fixed by I2C specification and must be equal to ‘11110’. However, those bits
are compared by hardware and are not affected by the value in this register.
bit 2-1
ADD<2:1>: Two Most Significant bits of 10-bit address
bit 0
Not used: Unused in this mode. Bit state is a “don’t care”.
10-Bit Slave mode — Least Significant Address byte:
bit 7-0
ADD<7:0>: Eight Least Significant bits of 10-bit address
7-Bit Slave mode:
bit 7-1
ADD<7:1>: 7-bit address
bit 0
Not used: Unused in this mode. Bit state is a “don’t care”.
DS22331A-page 186
 2013 Microchip Technology Inc.
MCP19111
REGISTER 27-8:
SSPMSK2: SSP MASK REGISTER 2
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
MSK2<7:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-1
MSK2<7:1>: Mask bits
1 = The received address bit n is compared to SSPADD2<n> to detect I2C address match
0 = The received address bit n is not used to detect I2C address match
bit 0
MSK2<0>: Mask bit for I2C Slave mode, 10-bit Address
I2C Slave mode, 10-bit address (SSPM<3:0> = 0111 or 1111):
1 = The received address bit 0 is compared to SSPADD2<0> to detect I2C address match
0 = The received address bit 0 is not used to detect I2C address match
I2C Slave mode, 7-bit address, the bit is ignored
REGISTER 27-9:
R/W-0
SSPADD2: MSSP ADDRESS 2
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
ADD2<7:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
Master mode:
bit 7-0
ADD2<7:0>: Baud Rate Clock Divider bits
SCL pin clock period = ((ADD<7:0> + 1) *4)/FOSC
10-Bit Slave mode — Most Significant Address byte:
bit 7-3
Not used: Unused for Most Significant Address byte. Bit state of this register is a “don’t care”. Bit
pattern sent by master is fixed by I2C specification and must be equal to ‘11110’. However, those bits
are compared by hardware and are not affected by the value in this register.
bit 2-1
ADD2<2:1>: Two Most Significant bits of 10-bit address
bit 0
ADD2<0>: SSPADD2 Enable bit.
1 = Enable address matching with SSPADD2
0 = Disable address matching with SSPADD2
10-Bit Slave mode — Least Significant Address byte:
bit 7-0
ADD2<7:0>: Eight Least Significant bits of 10-bit address
7-Bit Slave mode:
bit 7-1
ADD2<7:1>: 7-bit address
bit 0
ADD2<0>: SSPADD2 Enable bit.
1 = Enable address matching with SSPADD2
0 = Disable address matching with SSPADD2
 2013 Microchip Technology Inc.
DS22331A-page 187
MCP19111
NOTES:
DS22331A-page 188
 2013 Microchip Technology Inc.
MCP19111
28.0
IN-CIRCUIT SERIAL
PROGRAMMING™ (ICSP™)
28.1
Common Programming Interfaces
Connection to a target device is typically done through
an ICSP header. A commonly found connector on
development tools is the RJ-11 in the 6P6C (6 pin,
6 connector) configuration. See Figure 28-1.
ICSP programming allows customers to manufacture
circuit boards with unprogrammed devices. Programming
can be done after the assembly process, allowing the
device to be programmed with the most recent firmware
or a custom firmware. Five pins are needed for ICSP
programming:
• ICSPCLK
• ICSPDAT
• MCLR
• VDD
• VSS
FIGURE 28-1:
ICSPDAT
NC
ICSPCLK
2 4 6
VDD
In Program/Verify mode the Program Memory, User IDs
and the Configuration Words are programmed through
serial communications. The ICSPDAT pin is a
bidirectional I/O used for transferring the serial data and
the ICSPCLK pin is the clock input. The device is placed
into a Program/Verify mode by holding the ICSPDAT and
ICSPCLK pins low, while raising the MCLR pin from VIL to
VIHH.
ICD RJ-11 STYLE
CONNECTOR INTERFACE
1 3 5
MCLR
VSS
Target
PC Board
Bottom Side
Pin Description
1
=
1 = MCLR
2
=
2 = VDDTarget
3
=
3 = VSS (ground)
4
=
4 = ICSPDAT
5
=
5 = ICSPCLK
6
=
6 = No Connect
Another connector often found in use with the PICkit™
programmers is a standard 6-pin header with 0.1 inch
spacing. Refer to Figure 28-2.
FIGURE 28-2:
PICkit-STYLE CONNECTOR INTERFACE
Pin 1 Indicator
Pin Description*
1
2
3
4
5
6
*
1
=
1 = MCLR
2
=
2 = VDDTarget
3
=
3 = VSS (ground)
4
=
4 = ICSPDAT
5
=
5 = ICSPCLK
6
=
6 = No Connect
The 6-pin header (0.100" spacing) accepts 0.025" square pins.
 2013 Microchip Technology Inc.
DS22331A-page 189
MCP19111
For additional interface recommendations, refer to your
specific device programmer manual prior to PCB
design.
It is recommended that isolation devices be used to
separate the programming pins from other circuitry.
The type of isolation is highly dependent on the specific
application and may include devices, such as resistors,
diodes, or even jumpers. See Figure 28-3 for more
information.
FIGURE 28-3:
TYPICAL CONNECTION FOR ICSP PROGRAMMING
External
Programming
Signals
VDD
Device to be
Programmed
VDD
VDD
VPP
MCLR
VSS
VSS
Data
ICSPDAT
Clock
ICSPCLK
*
*
*
To Normal Connections
DS22331A-page 190
* Isolation devices (as required)
 2013 Microchip Technology Inc.
MCP19111
29.0
INSTRUCTION SET SUMMARY
The MCP19111 instruction set is highly orthogonal and
is comprised of three basic categories:
• Byte-oriented operations
• Bit-oriented operations
• Literal and control operations
Each instruction is a 14-bit word divided into an
opcode, which specifies the instruction type, and one
or more operands, which further specify the operation
of the instruction. The formats for each of the
categories is presented in Figure 29-1, while the
various opcode fields are summarized in Table 29-1.
Table 29-2 lists the instructions recognized by the
MPASMTM assembler.
For byte-oriented instructions, ‘f’ represents a file
register designator and ‘d’ represents a destination
designator. The file register designator specifies which
file register is to be used by the instruction.
The destination designator specifies where the result of
the operation is to be placed. If ‘d’ is zero, the result is
placed in the W register. If ‘d’ is one, the result is placed
in the file register specified in the instruction.
For bit-oriented instructions, ‘b’ represents a bit field
designator, which selects the bit affected by the
operation, while ‘f’ represents the address of the file in
which the bit is located.
For literal and control operations, ‘k’ represents an
8-bit or 11-bit constant, or literal value.
One instruction cycle consists of four oscillator periods;
for an oscillator frequency of 4 MHz, this gives a normal
instruction execution time of 1 µs. All instructions are
executed within a single instruction cycle, unless a
conditional test is true, or the program counter is
changed as a result of an instruction. When this occurs,
the execution takes two instruction cycles, with the
second cycle executed as a NOP.
TABLE 29-1:
OPCODE FIELD
DESCRIPTIONS
Field
f
Description
Register file address (0x00 to 0x7F)
W
Working register (accumulator)
b
Bit address within an 8-bit file register
k
Literal field, constant data or label
x
Don’t care location (= 0 or 1).
The assembler will generate code with x = 0.
It is the recommended form of use for
compatibility with all Microchip software tools.
d
Destination select; d = 0: store result in W,
d = 1: store result in file register f.
Default is d = 1.
PC
Program Counter
TO
Time-Out bit
C
DC
Z
PD
Carry bit
Digit carry bit
Zero bit
Power-Down bit
FIGURE 29-1:
GENERAL FORMAT FOR
INSTRUCTIONS
Byte-Oriented file register operations
13
8 7 6
OPCODE
d
f (FILE #)
0
d = 0 for destination W
d = 1 for destination f
f = 7-bit file register address
Bit-Oriented file register operations
13
10 9
7 6
OPCODE
b (BIT #)
f (FILE #)
0
b = 3-bit bit address
f = 7-bit file register address
All instruction examples use the format ‘0xhh’ to
represent a hexadecimal number, where ‘h’ signifies a
hexadecimal digit.
Literal and control operations
29.1
Read-Modify-Write Operations
Any instruction that specifies a file register as part of
the instruction performs a Read-Modify-Write (RMW)
operation. The register is read, the data is modified,
and the result is stored according to either the
instruction or the destination designator ‘d’. A read
operation is performed on a register even if the
instruction writes to that register.
For example, a CLRF PORTA instruction will read
PORTGPA, clear all the data bits, then write the result
back to PORTGPA. This example would have the
unintended consequence of clearing the condition that
set the IOCIF flag.
 2013 Microchip Technology Inc.
General
13
8
7
OPCODE
0
k (literal)
k = 8-bit immediate value
CALL and GOTO instructions only
13
11
OPCODE
10
0
k (literal)
k = 11-bit immediate value
DS22331A-page 191
MCP19111
TABLE 29-2:
MCP19111 INSTRUCTION SET
14-Bit Opcode
Mnemonic,
Operands
Description
Cycles
MSb
LSb
Status
Affecte
d
Notes
BYTE-ORIENTED FILE REGISTER OPERATIONS
ADDWF
ANDWF
CLRF
CLRW
COMF
DECF
DECFSZ
INCF
INCFSZ
IORWF
MOVF
MOVWF
NOP
RLF
RRF
SUBWF
SWAPF
XORWF
f, d
f, d
f
–
f, d
f, d
f, d
f, d
f, d
f, d
f, d
f
–
f, d
f, d
f, d
f, d
f, d
Add W and f
AND W with f
Clear f
Clear W
Complement f
Decrement f
Decrement f, Skip if 0
Increment f
Increment f, Skip if 0
Inclusive OR W with f
Move f
Move W to f
No Operation
Rotate Left f through Carry
Rotate Right f through Carry
Subtract W from f
Swap nibbles in f
Exclusive OR W with f
1
1
1
1
1
1
1(2)
1
1(2)
1
1
1
1
1
1
1
1
1
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
0111
0101
0001
0001
1001
0011
1011
1010
1111
0100
1000
0000
0000
1101
1100
0010
1110
0110
dfff
dfff
lfff
0xxx
dfff
dfff
dfff
dfff
dfff
dfff
dfff
lfff
0xx0
dfff
dfff
dfff
dfff
dfff
ffff C, DC, Z
1, 2
ffff
Z
1, 2
ffff
Z
2
xxxx
Z
ffff
Z
1, 2
ffff
Z
1, 2
ffff
1, 2, 3
ffff
Z
1, 2
ffff
1, 2, 3
ffff
Z
1, 2
ffff
Z
1, 2
ffff
0000
ffff
C
1, 2
ffff
C
1, 2
ffff C, DC, Z
1, 2
ffff
1, 2
ffff
Z
1, 2
bfff
bfff
bfff
bfff
ffff
ffff
ffff
ffff
kkkk
kkkk
kkkk
0110
kkkk
kkkk
kkkk
0000
kkkk
0000
0110
kkkk
kkkk
kkkk C, DC, Z
kkkk
Z
kkkk
0100 TO, PD
kkkk
Z
kkkk
kkkk
1001
kkkk
1000
0011 TO, PD
kkkk C, DC, Z
Z
kkkk
BIT-ORIENTED FILE REGISTER OPERATIONS
BCF
BSF
BTFSC
BTFSS
f, b
f, b
f, b
f, b
Bit Clear f
Bit Set f
Bit Test f, Skip if Clear
Bit Test f, Skip if Set
1
1
1 (2)
1 (2)
01
01
01
01
00bb
01bb
10bb
11bb
1, 2
1, 2
3
3
LITERAL AND CONTROL OPERATIONS
ADDLW
ANDLW
CALL
CLRWDT
GOTO
IORLW
MOVLW
RETFIE
RETLW
RETURN
SLEEP
SUBLW
XORLW
Note 1:
2:
3:
k
k
k
–
k
k
k
–
k
–
–
k
k
Add literal and W
AND literal with W
Call Subroutine
Clear Watchdog Timer
Go to address
Inclusive OR literal with W
Move literal to W
Return from interrupt
Return with literal in W
Return from Subroutine
Go into Standby mode
Subtract W from literal
Exclusive OR literal with W
1
1
2
1
2
1
1
2
2
2
1
1
1
11
11
10
00
10
11
11
00
11
00
00
11
11
111x
1001
0kkk
0000
1kkk
1000
00xx
0000
01xx
0000
0000
110x
1010
When an I/O register is modified as a function of itself (e.g., MOVF PORTA, 1), the value used will be that
value present on the pins themselves. For example, if the data latch is ‘1’ for a pin configured as input and
is driven low by an external device, the data will be written back with a ‘0’.
If this instruction is executed on the TMR0 register (and where applicable, d = 1), the prescaler will be
cleared if assigned to the Timer0 module.
If the Program Counter (PC) is modified, or a conditional test is true, the instruction requires two cycles.
The second cycle is executed as a NOP.
DS22331A-page 192
 2013 Microchip Technology Inc.
MCP19111
29.2
Instruction Descriptions
ADDLW
Add literal and W
Syntax:
[ label ] ADDLW
Operands:
0  k  255
Operation:
(W) + k  (W)
Status Affected:
Description:
BCF
k
Bit Clear f
Syntax:
[ label ] BCF
Operands:
0  f  127
0b7
C, DC, Z
Operation:
0  (f<b>)
The contents of the W register
are added to the eight-bit literal ‘k’
and the result is placed in the
W register.
Status Affected:
None
Description:
Bit ‘b’ in register ‘f’ is cleared.
ADDWF
Add W and f
BSF
Bit Set f
Syntax:
[ label ] ADDWF
Syntax:
[ label ] BSF
Operands:
0  f  127
d 0,1
Operands:
0  f  127
0b7
Operation:
(W) + (f)  (destination)
Operation:
1  (f<b>)
Status Affected:
C, DC, Z
Status Affected:
None
Description:
Add the contents of the W register
with register ‘f’. If ‘d’ is ‘0’, the
result is stored in the W register. If
‘d’ is ‘1’, the result is stored back
in register ‘f’.
Description:
Bit ‘b’ in register ‘f’ is set.
ANDLW
AND literal with W
BTFSC
Bit Test f, Skip if Clear
Syntax:
[ label ] ANDLW
Syntax:
[ label ] BTFSC f,b
Operands:
0  k  255
Operands:
Operation:
(W) .AND. (k)  (W)
0  f  127
0b7
Status Affected:
Z
Operation:
skip if (f<b>) = 0
Description:
The contents of W register are
AND’ed with the eight-bit literal
‘k’. The result is placed in the W
register.
Status Affected:
None
Description:
If bit ‘b’ in register ‘f’ is ‘1’, the next
instruction is executed.
If bit ‘b’ in register ‘f’ is ‘0’, the next
instruction is discarded, and a NOP
is executed instead, making this a
two-cycle instruction.
f,d
k
ANDWF
AND W with f
Syntax:
[ label ] ANDWF
Operands:
0  f  127
d 0,1
Operation:
(W) .AND. (f)  (destination)
Status Affected:
Z
Description:
AND the W register with register
‘f’. If ‘d’ is ‘0’, the result is stored in
the W register. If ‘d’ is ‘1’, the
result is stored back in register ‘f’.
 2013 Microchip Technology Inc.
f,b
f,b
f,d
DS22331A-page 193
MCP19111
BTFSS
Bit Test f, Skip if Set
CLRWDT
Clear Watchdog Timer
Syntax:
[ label ] BTFSS f,b
Syntax:
[ label ] CLRWDT
Operands:
0  f  127
0b<7
Operands:
None
Operation:
00h  WDT
0  WDT prescaler,
1  TO
1  PD
Status Affected:
TO, PD
Description:
CLRWDT instruction resets the
Watchdog Timer. It also resets the
prescaler of the WDT.
Status bits TO and PD are set.
Operation:
skip if (f<b>) = 1
Status Affected:
None
Description:
If bit ‘b’ in register ‘f’ is ‘0’, the next
instruction is executed.
If bit ‘b’ is ‘1’, then the next
instruction is discarded and a NOP
is executed instead, making this a
two-cycle instruction.
CALL
Call Subroutine
COMF
Complement f
Syntax:
[ label ] CALL k
Syntax:
[ label ] COMF
Operands:
0  k  2047
Operands:
Operation:
(PC)+ 1 TOS,
k  PC<10:0>,
(PCLATH<4:3>)  PC<12:11>
0  f  127
d  [0,1]
Operation:
(f)  (destination)
Status Affected:
Z
Status Affected:
None
Description:
Description:
Call Subroutine. First, return
address (PC + 1) is pushed onto
the stack. The eleven-bit
immediate address is loaded into
PC bits <10:0>. The upper bits of
the PC are loaded from PCLATH.
CALL is a two-cycle instruction.
The contents of register ‘f’ are
complemented. If ‘d’ is ‘0’, the
result is stored in W. If ‘d’ is ‘1’,
the result is stored back in
register ‘f’.
CLRF
Clear f
DECF
Decrement f
Syntax:
[ label ] CLRF
Syntax:
[ label ] DECF f,d
Operands:
0  f  127
Operands:
Operation:
00h  (f)
1Z
0  f  127
d  [0,1]
Operation:
(f) - 1  (destination)
Status Affected:
Z
Status Affected:
Z
Description:
The contents of register ‘f’ are
cleared and the Z bit is set.
Description:
Decrement register ‘f’. If ‘d’ is ‘0’,
the result is stored in the W
register. If ‘d’ is ‘1’, the result is
stored back in register ‘f’.
CLRW
Clear W
Syntax:
[ label ] CLRW
Operands:
None
Operation:
00h  (W)
1Z
f
Status Affected:
Z
Description:
W register is cleared. Zero bit (Z)
is set.
DS22331A-page 194
f,d
 2013 Microchip Technology Inc.
MCP19111
DECFSZ
Decrement f, Skip if 0
INCFSZ
Increment f, Skip if 0
Syntax:
[ label ] DECFSZ f,d
Syntax:
[ label ]
Operands:
0  f  127
d  [0,1]
Operands:
0  f  127
d  [0,1]
Operation:
(f) - 1  (destination);
skip if result = 0
Operation:
(f) + 1  (destination),
skip if result = 0
Status Affected:
None
Status Affected:
None
Description:
The contents of register ‘f’ are
decremented. If ‘d’ is ‘0’, the result
is placed in the W register. If ‘d’ is
‘1’, the result is placed back in
register ‘f’.
If the result is ‘1’, the next
instruction is executed. If the
result is ‘0’, then a NOP is
executed instead, making it a
two-cycle instruction.
Description:
The contents of register ‘f’ are
incremented. If ‘d’ is ‘0’, the result
is placed in the W register. If ‘d’ is
‘1’, the result is placed back in
register ‘f’.
If the result is ‘1’, the next
instruction is executed. If the
result is ‘0’, a NOP is executed
instead, making it a two-cycle
instruction.
GOTO
Unconditional Branch
IORLW
Inclusive OR literal with W
Syntax:
[ label ]
Syntax:
[ label ]
Operands:
0  k  2047
Operands:
0  k  255
Operation:
k  PC<10:0>
PCLATH<4:3>  PC<12:11>
Operation:
(W) .OR. k  (W)
Status Affected:
Z
Status Affected:
None
Description:
Description:
GOTO is an unconditional branch.
The eleven-bit immediate value is
loaded into PC bits <10:0>. The
upper bits of PC are loaded from
PCLATH<4:3>. GOTO is a
two-cycle instruction.
The contents of the W register are
OR’ed with the eight-bit literal ‘k’.
The result is placed in the
W register.
INCF
Increment f
IORWF
Inclusive OR W with f
Syntax:
[ label ]
Syntax:
[ label ]
Operands:
0  f  127
d  [0,1]
Operands:
0  f  127
d  [0,1]
Operation:
(f) + 1  (destination)
Operation:
(W) .OR. (f)  (destination)
Status Affected:
Z
Status Affected:
Z
Description:
The contents of register ‘f’ are
incremented. If ‘d’ is ‘0’, the result
is placed in the W register. If ‘d’ is
‘1’, the result is placed back in
register ‘f’.
Description:
Inclusive OR the W register with
register ‘f’. If ‘d’ is ‘0’, the result is
placed in the W register. If ‘d’ is
‘1’, the result is placed back in
register ‘f’.
GOTO k
INCF f,d
 2013 Microchip Technology Inc.
INCFSZ f,d
IORLW k
IORWF
f,d
DS22331A-page 195
MCP19111
MOVF
Move f
Syntax:
[ label ]
Operands:
0  f  127
d  [0,1]
MOVF f,d
MOVWF
Move W to f
Syntax:
[ label ]
MOVWF
Operands:
0  f  127
Operation:
(W)  (f)
f
Operation:
(f)  (dest)
Status Affected:
None
Status Affected:
Z
Description:
Description:
The contents of register ‘f’ is
moved to a destination dependent
upon the status of ‘d’. If d = 0,
destination is W register. If d = 1,
the destination is file register ‘f’
itself. d = 1 is useful to test a file
register since Status flag Z is
affected.
Move data from W register to
register ‘f’.
Words:
1
Cycles:
1
Words:
1
Cycles:
1
Example:
MOVF
Example:
MOVW
F
OPTION
Before Instruction
OPTION =
W
=
After Instruction
OPTION =
W
=
FSR, 0
0xFF
0x4F
0x4F
0x4F
After Instruction
W =
value in
FSR register
Z = 1
NOP
No Operation
Move literal to W
Syntax:
[ label ]
Syntax:
[ label ]
Operands:
None
Operands:
0  k  255
Operation:
No operation
Operation:
k  (W)
Status Affected:
None
Status Affected:
None
Description:
No operation.
Description:
The eight-bit literal ‘k’ is loaded into
W register. The “don’t cares” will
assemble as ‘0’s.
Words:
1
Cycles:
1
MOVLW
Words:
1
Cycles:
1
Example:
MOVLW
MOVLW k
NOP
0x5A
After Instruction
W =
DS22331A-page 196
Example:
NOP
0x5A
 2013 Microchip Technology Inc.
MCP19111
RETFIE
Return from Interrupt
RETLW
Return with literal in W
Syntax:
[ label ]
Syntax:
[ label ]
RETFIE
RETLW k
Operands:
None
Operands:
0  k  255
Operation:
TOS  PC,
1  GIE
Operation:
k  (W);
TOS  PC
Status Affected:
None
Status Affected:
None
Description:
Return from Interrupt. Stack is
POPed and Top-of-Stack (TOS) is
loaded in the PC. Interrupts are
enabled by setting Global
Interrupt Enable bit, GIE
(INTCON<7>). This is a two-cycle
instruction.
Description:
The W register is loaded with the
eight-bit literal ‘k’. The program
counter is loaded from the top of
the stack (the return address).
This is a two-cycle instruction.
Words:
1
Cycles:
2
Words:
1
Cycles:
2
Example:
Example:
RETFIE
After Interrupt
PC =
GIE =
TOS
1
TABLE
CALL TABLE;W contains
;table offset
;value
GOTO DONE
•
•
ADDWF PC ;W = offset
RETLW k1 ;Begin table
RETLW k2 ;
•
•
•
RETLW kn ;End of table
DONE
Before Instruction
W = 0x07
After Instruction
W = value of k8
RETURN
 2013 Microchip Technology Inc.
Return from Subroutine
Syntax:
[ label ]
Operands:
None
RETURN
Operation:
TOS  PC
Status Affected:
None
Description:
Return from subroutine. The stack
is POPed and the top of the stack
(TOS) is loaded into the program
counter. This is a two-cycle
instruction.
DS22331A-page 197
MCP19111
RLF
Rotate Left f through Carry
SLEEP
Enter Sleep mode
Syntax:
[ label ]
Syntax:
[ label ] SLEEP
Operands:
0  f  127
d  [0,1]
RLF
f,d
Operation:
See description below
Status Affected:
C
Description:
The contents of register ‘f’ are
rotated one bit to the left through
the Carry flag. If ‘d’ is ‘0’, the
result is placed in the W register.
If ‘d’ is ‘1’, the result is stored
back in register ‘f’.
C
Words:
1
Cycles:
1
Example:
RLF
Operands:
None
Operation:
00h  WDT,
0  WDT prescaler,
1  TO,
0  PD
Status Affected:
TO, PD
Description:
The power-down Status bit, PD is
cleared. Time-out Status bit, TO
is set. Watchdog Timer and its
prescaler are cleared.
The processor is put into Sleep
mode with the oscillator stopped.
Register f
REG1,0
Before Instruction
REG1
=
0110
C
=
After Instruction
REG1
=
0110
W
=
1100
C
=
1110
0
1110
1100
1
RRF
Rotate Right f through Carry
SUBLW
Subtract W from literal
Syntax:
[ label ]
Syntax:
[ label ] SUBLW k
Operands:
0  f  127
d  [0,1]
Operands:
0 k 255
Operation:
k - (W) W)
Operation:
See description below
Status Affected:
C
Description:
The contents of register ‘f’ are
rotated one bit to the right through
the Carry flag. If ‘d’ is ‘0’, the
result is placed in the W register.
If ‘d’ is ‘1’, the result is placed
back in register ‘f’.
RRF f,d
Description:
C
DS22331A-page 198
Status Affected: C, DC, Z
Register f
The W register is subtracted (two’s
complement method) from the
eight-bit literal ‘k’. The result is
placed in the W register.
Result
Condition
C=0
Wk
C=1
Wk
DC = 0
W<3:0>  k<3:0>
DC = 1
W<3:0>  k<3:0>
 2013 Microchip Technology Inc.
MCP19111
SUBWF
Subtract W from f
XORWF
Exclusive OR W with f
Syntax:
[ label ] SUBWF f,d
Syntax:
[ label ] XORWF
Operands:
0 f 127
d  [0,1]
Operands:
0  f  127
d  [0,1]
Operation:
(f) - (W) destination)
Operation:
(W) .XOR. (f) destination)
Status Affected: C, DC, Z
Status Affected:
Z
Description:
Description:
Exclusive OR the contents of the
W register with register ‘f’. If ‘d’ is
‘0’, the result is stored in the W
register. If ‘d’ is ‘1’, the result is
stored back in register ‘f’.
Subtract (two’s complement
method) W register from register ‘f’.
If ‘d’ is ‘0’, the result is stored in the
W register. If ‘d’ is ‘1’, the result is
stored back in register ‘f’.
C=0
Wf
C=1
Wf
DC = 0
W<3:0>  f<3:0>
DC = 1
W<3:0>  f<3:0>
SWAPF
Swap Nibbles in f
Syntax:
[ label ] SWAPF f,d
Operands:
0  f  127
d  [0,1]
Operation:
(f<3:0>)  (destination<7:4>),
(f<7:4>)  (destination<3:0>)
Status Affected:
None
Description:
The upper and lower nibbles of
register ‘f’ are exchanged. If ‘d’ is
‘0’, the result is placed in the W
register. If ‘d’ is ‘1’, the result is
placed in register ‘f’.
XORLW
Exclusive OR literal with W
Syntax:
[ label ] XORLW k
Operands:
0 k 255
Operation:
(W) .XOR. k W)
Status Affected:
Z
Description:
The contents of the W register
are XOR’ed with the eight-bit
literal ‘k’. The result is placed in
the W register.
 2013 Microchip Technology Inc.
f,d
DS22331A-page 199
MCP19111
NOTES:
DS22331A-page 200
 2013 Microchip Technology Inc.
MCP19111
30.0
DEVELOPMENT SUPPORT
The PIC® microcontrollers and dsPIC® digital signal
controllers are supported with a full range of software
and hardware development tools:
• Integrated Development Environment
- MPLAB® IDE Software
• Compilers/Assemblers/Linkers
- MPLAB C Compiler for Various Device
Families
- HI-TECH C® for Various Device Families
- MPASMTM Assembler
- MPLINKTM Object Linker/
MPLIBTM Object Librarian
- MPLAB Assembler/Linker/Librarian for
Various Device Families
• Simulators
- MPLAB SIM Software Simulator
• Emulators
- MPLAB REAL ICE™ In-Circuit Emulator
• In-Circuit Debuggers
- MPLAB ICD 3
- PICkit™ 3 Debug Express
• Device Programmers
- PICkit™ 2 Programmer
- MPLAB PM3 Device Programmer
• Low-Cost Demonstration/Development Boards,
Evaluation Kits, and Starter Kits
30.1
MPLAB Integrated Development
Environment Software
The MPLAB IDE software brings an ease of software
development previously unseen in the 8/16/32-bit
microcontroller market. The MPLAB IDE is a Windows®
operating system-based application that contains:
• A single graphical interface to all debugging tools
- Simulator
- Programmer (sold separately)
- In-Circuit Emulator (sold separately)
- In-Circuit Debugger (sold separately)
• A full-featured editor with color-coded context
• A multiple project manager
• Customizable data windows with direct edit of
contents
• High-level source code debugging
• Mouse over variable inspection
• Drag and drop variables from source to watch
windows
• Extensive on-line help
• Integration of select third party tools, such as
IAR C Compilers
The MPLAB IDE allows you to:
• Edit your source files (either C or assembly)
• One-touch compile or assemble, and download to
emulator and simulator tools (automatically
updates all project information)
• Debug using:
- Source files (C or assembly)
- Mixed C and assembly
- Machine code
MPLAB IDE supports multiple debugging tools in a
single development paradigm, from the cost-effective
simulators, through low-cost in-circuit debuggers, to
full-featured emulators. This eliminates the learning
curve when upgrading to tools with increased flexibility
and power.
 2013 Microchip Technology Inc.
DS22331A-page 201
MCP19111
30.2
MPLAB C Compilers for Various
Device Families
The MPLAB C Compiler code development systems
are complete ANSI C compilers for Microchip’s PIC18,
PIC24 and PIC32 families of microcontrollers and the
dsPIC30 and dsPIC33 families of digital signal
controllers. These compilers provide powerful
integration capabilities, superior code optimization and
ease of use.
For easy source level debugging, the compilers provide
symbol information that is optimized to the MPLAB IDE
debugger.
30.3
HI-TECH C for Various Device
Families
The HI-TECH C Compiler code development systems
are complete ANSI C compilers for Microchip’s PIC
family of microcontrollers and the dsPIC family of digital
signal controllers. These compilers provide powerful
integration capabilities, omniscient code generation
and ease of use.
For easy source level debugging, the compilers provide
symbol information that is optimized to the MPLAB IDE
debugger.
The compilers include a macro assembler, linker,
preprocessor, and one-step driver, and can run on
multiple platforms.
30.4
MPASM Assembler
The MPASM Assembler is a full-featured, universal
macro assembler for PIC10/12/16/18 MCUs.
The MPASM Assembler generates relocatable object
files for the MPLINK Object Linker, Intel® standard HEX
files, MAP files to detail memory usage and symbol
reference, absolute LST files that contain source lines
and generated machine code and COFF files for
debugging.
The MPASM Assembler features include:
30.5
MPLINK Object Linker/
MPLIB Object Librarian
The MPLINK Object Linker combines relocatable
objects created by the MPASM Assembler and the
MPLAB C18 C Compiler. It can link relocatable objects
from precompiled libraries, using directives from a
linker script.
The MPLIB Object Librarian manages the creation and
modification of library files of precompiled code. When
a routine from a library is called from a source file, only
the modules that contain that routine will be linked in
with the application. This allows large libraries to be
used efficiently in many different applications.
The object linker/library features include:
• Efficient linking of single libraries instead of many
smaller files
• Enhanced code maintainability by grouping
related modules together
• Flexible creation of libraries with easy module
listing, replacement, deletion and extraction
30.6
MPLAB Assembler, Linker and
Librarian for Various Device
Families
MPLAB Assembler produces relocatable machine
code from symbolic assembly language for PIC24,
PIC32 and dsPIC devices. MPLAB C Compiler uses
the assembler to produce its object file. The assembler
generates relocatable object files that can then be
archived or linked with other relocatable object files and
archives to create an executable file. Notable features
of the assembler include:
•
•
•
•
•
•
Support for the entire device instruction set
Support for fixed-point and floating-point data
Command line interface
Rich directive set
Flexible macro language
MPLAB IDE compatibility
• Integration into MPLAB IDE projects
• User-defined macros to streamline
assembly code
• Conditional assembly for multi-purpose
source files
• Directives that allow complete control over the
assembly process
DS22331A-page 202
 2013 Microchip Technology Inc.
MCP19111
30.7
MPLAB SIM Software Simulator
The MPLAB SIM Software Simulator allows code
development in a PC-hosted environment by simulating the PIC MCUs and dsPIC® DSCs on an instruction
level. On any given instruction, the data areas can be
examined or modified and stimuli can be applied from
a comprehensive stimulus controller. Registers can be
logged to files for further run-time analysis. The trace
buffer and logic analyzer display extend the power of
the simulator to record and track program execution,
actions on I/O, most peripherals and internal registers.
The MPLAB SIM Software Simulator fully supports
symbolic debugging using the MPLAB C Compilers,
and the MPASM and MPLAB Assemblers. The
software simulator offers the flexibility to develop and
debug code outside of the hardware laboratory
environment, making it an excellent, economical
software development tool.
30.8
MPLAB REAL ICE In-Circuit
Emulator System
MPLAB REAL ICE In-Circuit Emulator System is
Microchip’s next generation high-speed emulator for
Microchip Flash DSC and MCU devices. It debugs and
programs PIC® Flash MCUs and dsPIC® Flash DSCs
with the easy-to-use, powerful graphical user interface of
the MPLAB Integrated Development Environment (IDE),
included with each kit.
The emulator is connected to the design engineer’s PC
using a high-speed USB 2.0 interface and is connected
to the target with either a connector compatible with incircuit debugger systems (RJ11) or with the new highspeed, noise tolerant, Low-Voltage Differential Signal
(LVDS) interconnection (CAT5).
The emulator is field upgradable through future firmware
downloads in MPLAB IDE. In upcoming releases of
MPLAB IDE, new devices will be supported, and new
features will be added. MPLAB REAL ICE offers
significant advantages over competitive emulators
including low-cost, full-speed emulation, run-time
variable watches, trace analysis, complex breakpoints, a
ruggedized probe interface and long (up to three meters)
interconnection cables.
 2013 Microchip Technology Inc.
30.9
MPLAB ICD 3 In-Circuit Debugger
System
MPLAB ICD 3 In-Circuit Debugger System is
Microchip's most cost effective high-speed hardware
debugger/programmer for Microchip Flash Digital
Signal Controller (DSC) and microcontroller (MCU)
devices. It debugs and programs PIC® Flash
microcontrollers and dsPIC® DSCs with the powerful,
yet easy-to-use graphical user interface of MPLAB
Integrated Development Environment (IDE).
The MPLAB ICD 3 In-Circuit Debugger probe is connected to the design engineer's PC using a high-speed
USB 2.0 interface and is connected to the target with a
connector compatible with the MPLAB ICD 2 or MPLAB
REAL ICE systems (RJ-11). MPLAB ICD 3 supports all
MPLAB ICD 2 headers.
30.10 PICkit 3 In-Circuit Debugger/
Programmer and
PICkit 3 Debug Express
The MPLAB PICkit 3 allows debugging and
and
dsPIC®
Flash
programming
of
PIC®
microcontrollers at a most affordable price point using
the powerful graphical user interface of the MPLAB
Integrated Development Environment (IDE). The
MPLAB PICkit 3 is connected to the design engineer's
PC using a full speed USB interface and can be
connected to the target via an Microchip debug (RJ-11)
connector (compatible with MPLAB ICD 3 and MPLAB
REAL ICE). The connector uses two device I/O pins
and the reset line to implement in-circuit debugging and
In-Circuit Serial Programming™.
The PICkit 3 Debug Express include the PICkit 3, demo
board and microcontroller, hookup cables and CDROM
with user’s guide, lessons, tutorial, compiler and
MPLAB IDE software.
DS22331A-page 203
MCP19111
30.11 PICkit 2 Development
Programmer/Debugger and
PICkit 2 Debug Express
30.13 Demonstration/Development
Boards, Evaluation Kits, and
Starter Kits
The PICkit™ 2 Development Programmer/Debugger is
a low-cost development tool with an easy to use
interface for programming and debugging Microchip’s
Flash families of microcontrollers. The full featured
Windows® programming interface supports baseline
(PIC10F,
PIC12F5xx,
PIC16F5xx),
midrange
(PIC12F6xx, PIC16F), PIC18F, PIC24, dsPIC30,
dsPIC33, and PIC32 families of 8-bit, 16-bit, and 32-bit
microcontrollers, and many Microchip Serial EEPROM
products. With Microchip’s powerful MPLAB Integrated
Development Environment (IDE) the PICkit™ 2
enables in-circuit debugging on most PIC®
microcontrollers. In-Circuit-Debugging runs, halts and
single steps the program while the PIC microcontroller
is embedded in the application. When halted at a
breakpoint, the file registers can be examined and
modified.
A wide variety of demonstration, development and
evaluation boards for various PIC MCUs and dsPIC
DSCs allows quick application development on fully functional systems. Most boards include prototyping areas for
adding custom circuitry and provide application firmware
and source code for examination and modification.
The PICkit 2 Debug Express include the PICkit 2, demo
board and microcontroller, hookup cables and CDROM
with user’s guide, lessons, tutorial, compiler and
MPLAB IDE software.
30.12 MPLAB PM3 Device Programmer
The MPLAB PM3 Device Programmer is a universal,
CE compliant device programmer with programmable
voltage verification at VDDMIN and VDDMAX for
maximum reliability. It features a large LCD display
(128 x 64) for menus and error messages and a modular, detachable socket assembly to support various
package types. The ICSP™ cable assembly is included
as a standard item. In Stand-Alone mode, the MPLAB
PM3 Device Programmer can read, verify and program
PIC devices without a PC connection. It can also set
code protection in this mode. The MPLAB PM3
connects to the host PC via an RS-232 or USB cable.
The MPLAB PM3 has high-speed communications and
optimized algorithms for quick programming of large
memory devices and incorporates an MMC card for file
storage and data applications.
DS22331A-page 204
The boards support a variety of features, including LEDs,
temperature sensors, switches, speakers, RS-232
interfaces, LCD displays, potentiometers and additional
EEPROM memory.
The demonstration and development boards can be
used in teaching environments, for prototyping custom
circuits and for learning about various microcontroller
applications.
In addition to the PICDEM™ and dsPICDEM™ demonstration/development board series of circuits, Microchip
has a line of evaluation kits and demonstration software
for analog filter design, KEELOQ® security ICs, CAN,
IrDA®, PowerSmart battery management, SEEVAL®
evaluation system, Sigma-Delta ADC, flow rate
sensing, plus many more.
Also available are starter kits that contain everything
needed to experience the specified device. This usually
includes a single application and debug capability, all
on one board.
Check the Microchip web page (www.microchip.com)
for the complete list of demonstration, development
and evaluation kits.
 2013 Microchip Technology Inc.
MCP19111
31.0
PACKAGING INFORMATION
31.1
Package Marking Information
28-Lead QFN (5x5x0.9 mm)
PIN 1
Example
PIN 1
19111
e3
E/MQ ^^
1246256
Legend: XX...X
Y
YY
WW
NNN
e3
*
Note:
Customer-specific information
Year code (last digit of calendar year)
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
Pb-free JEDEC designator for Matte Tin (Sn)
This package is Pb-free. The Pb-free JEDEC designator ( e3 )
can be found on the outer packaging for this package.
In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
 2013 Microchip Technology Inc.
DS22331A-page 205
MCP19111
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
DS22331A-page 206
 2013 Microchip Technology Inc.
MCP19111
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
 2013 Microchip Technology Inc.
DS22331A-page 207
MCP19111
28-Lead Plastic Quad Flat, No Lead Package (MQ) – 5x5 mm Body [QFN] Land Pattern
With 0.55 mm Contact Length
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
Microchip Technology Drawing C04-2140A
DS22331A-page 208
 2013 Microchip Technology Inc.
MCP19111
APPENDIX A:
REVISION HISTORY
Revision A (January 2013)
• Original Release of this Document.
 2013 Microchip Technology Inc.
DS22331A-page 209
MCP19111
NOTES:
DS22331A-page 210
 2013 Microchip Technology Inc.
MCP19111
INDEX
A
Block Diagrams MCP19111.................................................. 8
A/D
C
Specifications.......................................................... 3, 31
A/D Conversion ................................................................. 125
Requirements.............................................................. 32
Timing ................................................................... 32, 33
Absolute Maximum Ratings ................................................ 21
AC Characteristics .............................................................. 28
ACKSTAT ......................................................................... 170
ACKSTAT Status Flag ...................................................... 170
ADC .................................................................................. 123
Acquisition Requirements ......................................... 129
Associated Registers ................................................ 131
Block Diagram........................................................... 123
Calculating Acquisition Time..................................... 129
Channel Selection..................................................... 124
Configuration............................................................. 124
Configuring Interrupt ................................................. 126
Conversion Clock...................................................... 124
Conversion Procedure .............................................. 126
Internal Sampling Switch (RSS) IMPEDANCE .............. 129
Interrupts................................................................... 125
Operation .................................................................. 126
Operation During Sleep ............................................ 126
Port Configuration ..................................................... 124
Register Definitions................................................... 127
Source Impedance.................................................... 129
Special Event Trigger................................................ 126
ADCON0 Register............................................................. 127
ADCON1 Register............................................................. 128
ADRESH Register (ADFM = 0) ......................................... 128
ADRESL Register (ADFM = 0).......................................... 128
Alternate Pin Function....................................................... 110
Analog Blocks Enable Control ............................................ 49
Analog Peripheral Control ................................................... 47
Analog-to-Digital Converter. See ADC
ANSELA Register ............................................................. 113
ANSELB Register ............................................................. 116
APFCON Register............................................................. 110
Assembler
MPASM Assembler................................................... 202
B
Bench Testing
Analog Bench Test Control ......................................... 55
System ........................................................................ 55
BF ............................................................................. 170, 172
BF Status Flag .......................................................... 170, 172
Block Diagrams
ADC .......................................................................... 123
ADC Transfer Function ............................................. 130
Analog Input Model ................................................... 130
Generic I/O Port ........................................................ 109
Interrupt Logic ............................................................. 92
MCLR Circuit............................................................... 84
MSSP (I2C Master Mode) ......................................... 145
MSSP (I2C Slave Mode) ........................................... 146
On-Chip Reset Circuit ................................................. 83
Simplified PWM......................................................... 142
Timer0....................................................................... 133
Timer1....................................................................... 135
Timer2....................................................................... 138
Watchdog Timer........................................................ 101
 2013 Microchip Technology Inc.
C Compilers
MPLAB C18.............................................................. 202
Calibration Word
Associated Registers.................................................. 82
Capture/Compare/PWM ........................................... 141, 143
Clock Switching .................................................................. 82
Code Examples
A/D Conversion ........................................................ 126
Assigning Prescaler to Timer0.................................. 134
Assigning Prescaler to WDT..................................... 134
Initializing PORTA .................................................... 109
Saving Status and W Registers in RAM ..................... 98
Compensation .................................................................... 16
Compensation Setting ........................................................ 41
Computed Function Calls ................................................... 76
Computed GOTO................................................................ 76
Current
Measurement Control ................................................. 49
Current Sense ........................................................ 16, 38, 39
Customer Change Notification Service............................. 217
Customer Support............................................................. 217
D
Data Memory ...................................................................... 68
Data Memory Map .............................................................. 70
DC and AC Characteristics................................................. 51
Graphs and Tables ..................................................... 51
DC Characteristics.............................................................. 28
Development Support ....................................................... 201
Device
Configuration ........................................................ 35, 79
Code Protection.................................................. 80
Configuration Word............................................. 79
ID Locations ....................................................... 80
User ID ............................................................... 80
Write Protection .................................................. 80
Device Calibration............................................................... 57
Calibration Word 1...................................................... 57
Calibration Word 2...................................................... 58
Calibration Word 3...................................................... 59
Calibration Word 4...................................................... 60
Calibration Word 5...................................................... 61
Calibration Word 6...................................................... 62
Calibration Word 7...................................................... 63
Device Overview................................................................... 7
Digital Electrical Characteristics ......................................... 27
Diode Emulation Mode ....................................................... 47
E
ECCP/CCP. See Enhanced Capture/Compare/PWM
Electrical Characteristics .............................................. 21, 22
Errata .................................................................................... 5
External Clock..................................................................... 28
DS22331A-page 211
MCP19111
F
Features
Microcontroller .............................................................. 1
Miscellaneous ............................................................. 19
Protection .................................................................... 18
Synchronous Buck ........................................................ 1
Firmware Instructions........................................................ 191
Flash Program Memory Control ........................................ 103
Operation During Code Protect................................. 107
Operation during write Protect .................................. 107
Protecting .................................................................. 107
Reading..................................................................... 106
Writing to ................................................................... 107
Flash Program Memory Control Registers........................ 104
H
High-Side Drive Strength .................................................... 47
I
I/O
Ports.......................................................................... 109
I2C Mode (MSSPx)
Acknowledge Sequence ........................................... 150
Acknowledge Sequence Timing................................ 174
Associated Registers ................................................ 180
Bus Collision
During a Repeated Start Condition ................... 178
During a Start Condition.................................... 176
During a Stop Condition.................................... 179
Effects of a Reset...................................................... 175
I2C Clock Rate w/BRG .............................................. 181
Master Mode ............................................................. 167
Clock Arbitration................................................ 167
Operation .......................................................... 167
Reception.......................................................... 172
Start Condition Timing .............................. 168, 169
Transmission..................................................... 170
Multi-Master Communication, Bus Collision and
Arbitration.......................................................... 175
Multi-Master Mode .................................................... 175
Operation .................................................................. 148
Overview ................................................................... 146
Read/Write Bit Information (R/W Bit) ........................ 151
Slave Mode
10-bit Address Reception.................................. 161
Bus Collision ..................................................... 157
Clock Synchronization ...................................... 165
General Call Address Support .......................... 166
Operation .......................................................... 151
SSPMSKx Register........................................... 166
Transmission..................................................... 157
Sleep Operation ........................................................ 175
Stop Condition Timing............................................... 174
In-Circuit Serial Programming (ICSP) ............................... 189
Common Programming Interfaces ............................ 189
Indirect Addressing ............................................................. 76
Input .................................................................................... 22
Type ............................................................................ 10
Under Voltage Lockout ......................................... 18, 35
Instruction Format ............................................................. 191
Instruction Set ................................................................... 191
ADDLW ..................................................................... 193
ADDWF ..................................................................... 193
ANDLW ..................................................................... 193
ANDWF ..................................................................... 193
DS22331A-page 212
MOVF ....................................................................... 196
BCF .......................................................................... 193
BSF........................................................................... 193
BTFSC ...................................................................... 193
BTFSS ...................................................................... 194
CALL......................................................................... 194
CLRF ........................................................................ 194
CLRW ....................................................................... 194
CLRWDT .................................................................. 194
COMF ....................................................................... 194
DECF ........................................................................ 194
DECFSZ ................................................................... 195
GOTO ....................................................................... 195
INCF ......................................................................... 195
INCFSZ..................................................................... 195
IORLW ...................................................................... 195
IORWF...................................................................... 195
MOVLW .................................................................... 196
MOVWF .................................................................... 196
NOP .......................................................................... 196
RETFIE ..................................................................... 197
RETLW ..................................................................... 197
RETURN................................................................... 197
RLF ........................................................................... 198
RRF .......................................................................... 198
SLEEP ...................................................................... 198
SUBLW ..................................................................... 198
SUBWF..................................................................... 199
SWAPF ..................................................................... 199
XORLW .................................................................... 199
XORWF .................................................................... 199
Summary Table ........................................................ 192
Internal Sampling Switch (RSS) IMPEDANCE ...................... 129
Internal Synchronous Driver ............................................... 15
Internal Temperature Indicator Module............................. 121
Circuit Operation....................................................... 121
Temperature Output ................................................. 121
Internal Temperature Measurement Control....................... 49
Internet Address ............................................................... 217
Interrupt-On-Change......................................................... 119
Interrupt-on-Change
Associated Registers ................................................ 120
Clearing Interrupt Flags ............................................ 119
Enabling the Module ................................................. 119
Operation in Sleep .................................................... 119
Pin Configuration ...................................................... 119
Registers .................................................................. 120
Interrupts
ADC .......................................................................... 126
Associated Registers .................................................. 97
Context Saving ........................................................... 98
Control Registers ........................................................ 93
RA2/INT ...................................................................... 91
TMR1 ........................................................................ 136
L
Linear Regulators ............................................................... 15
 2013 Microchip Technology Inc.
MCP19111
M
P
MASTER Error Signal Gain ................................................ 43
Master Synchronous Serial Port. See MSSPx
MCLR .................................................................................. 84
Internal ........................................................................ 84
Memory Organization.......................................................... 67
Data ............................................................................ 68
Program ...................................................................... 67
Microchip Internet Web Site .............................................. 217
MOSFET ................................... 13, 14, 15, 36, 44, 47, 55, 65
Driver Dead Time........................................................ 15
MOSFET Driver
Dead Time .................................................................. 47
Programmable Dead Time.......................................... 44
MPLAB ASM30 Assembler, Linker, Librarian ................... 202
MPLAB Integrated Development Environment Software .. 201
MPLAB PM3 Device Programmer .................................... 204
MPLAB REAL ICE In-Circuit Emulator System................. 203
MPLINK Object Linker/MPLIB Object Librarian ................ 202
MSSPx .............................................................................. 145
Arbitration.................................................................. 148
Baud Rate Generator................................................ 181
Clock Stretching........................................................ 148
I2C Bus Terms .......................................................... 149
I2C Master Mode....................................................... 167
I2C Mode................................................................... 146
I2C Mode Operation .................................................. 148
I2C Slave Mode Operation ........................................ 151
Module Overview ...................................................... 145
Multi-Phase System ............................................................ 20
Packaging ......................................................................... 205
Marking..................................................................... 205
PCL..................................................................................... 76
Modifying .................................................................... 76
PCLATH ............................................................................. 76
PCON Register ............................................................. 85, 90
PICkit
PICkit 2 Debug Express ........................................... 204
PICkit 2 Development Programmer/Debugger ......... 204
PICkit 3 Debug Express ........................................... 203
PICkit 3 In-Circuit Debugger/Programmer................ 203
Pin Diagram .......................................................................... 2
Pinout Description
Summary ...................................................................... 3
Pinout Descriptions
MCP19111.................................................................. 10
PIR1 Register ..................................................................... 96
PIR2 Register ..................................................................... 97
PMADRH Register............................................................ 103
PMADRL Register .................................................... 103, 104
PMCON1 Register .................................................... 103, 105
PMCON2 Register ............................................................ 103
PMDATH Register ............................................................ 104
PMDATL Register............................................................. 104
PMDRH Register .............................................................. 105
PORTB
Additional Pin Functions
Weak Pull-up .................................................... 115
Pin Descriptions and Diagrams ................................ 117
PORTGPA ................................................................ 110, 119
ANSELA Register ..................................................... 111
Associated Registers................................................ 113
Functions and Output Priorities ................................ 111
Interrupt-on-Change ................................................. 110
Weak Pull-Ups.......................................................... 110
PORTGPA Register.......................................................... 110
PORTGPB ................................................................ 114, 119
ANSELB Register ..................................................... 114
Associated Registers................................................ 117
Functions and Output Priorities ................................ 114
Interrupt-on-Change ................................................. 114
P1B/P1C/P1D.Capture/Compare/PWM ................... 114
Weak Pull-Ups.......................................................... 114
PORTGPB Register.................................................. 114, 115
Power-Down Mode (Sleep)................................................. 99
Associated Registers................................................ 100
Power-on Reset (POR)....................................................... 84
Power-up Timer (PWRT) .................................................... 85
Prescaler, Timer1
Select (T1CKPS1:T1CKPS0 Bits) .............................. 44
Product Identification System ........................................... 219
Program Memory ................................................................ 67
Map and Stack (MCP19111) ...................................... 67
Program Memory Protection............................................... 80
Programming, Device Instructions.................................... 191
Pulse-Width Modulation...................................................... 31
Associated Registers................................................ 143
Duty Cycle ................................................................ 143
Module...................................................................... 141
Operating during Sleep............................................. 143
Period ....................................................................... 142
Stand-alone Mode .................................................... 141
Standard Mode ......................................................... 141
Switching Frequency Synchronization Mode............ 141
O
OPCODE Field Descriptions ............................................. 191
Oscillator ............................................................................. 81
Associated Registers .................................................. 82
Calibration................................................................... 81
Delay Upon Power-up................................................. 82
Frequency Tuning ....................................................... 81
Internal Oscillator ........................................................ 81
Oscillator Module ................................................................ 82
Output ................................................................................. 47
Multiple System........................................................... 20
Overcurrent ..................................................... 18, 36, 37
Overvoltage..................................................... 18, 23, 46
Overvoltage Enable .................................................... 49
Power Good ................................................................ 20
Type ............................................................................ 10
Under Voltage ................................................. 18, 23, 46
Under Voltage Accelerator.......................................... 47
Under Voltage Enable................................................. 49
Voltage........................................................................ 16
Soft-Start............................................................. 20
Tracking .............................................................. 20
Voltage Configuration ................................................. 45
Voltage Sense Pull-up/Pull-down................................ 47
Overcurrent ......................................................................... 37
Overvoltage Accelerator ..................................................... 47
 2013 Microchip Technology Inc.
DS22331A-page 213
MCP19111
R
Reader Response ............................................................. 218
Read-Modify-Write Operations.......................................... 191
Register
OVFCON (Output Voltage Set Point Fine Control) ..... 45
Registers
ABECON (Analog Block Enable Control).................... 50
ADCON0 (ADC Control 0) ........................................ 127
ADCON1 (ADC Control 1) ........................................ 128
ADRESH (ADC Result High) with ADFM = 0)........... 128
ADRESL (ADC Result Low) with ADFM = 0) ............ 128
ANSELA (Analog Select GPA).................................. 113
ANSELB (Analog Select GPB).................................. 116
APFCON (Alternate Pin Function Control)................ 110
ATSTCON (Analog Bench Test Control) .................... 55
BUFFCON (Unity Gain Buffer Control) ....................... 56
CALWD1 (Calibration Word 1) .................................... 57
CALWD2 (Calibration Word 2) .................................... 58
CALWD3 (Calibration Word 3) .................................... 59
CALWD4 (Calibration Word 4) .................................... 60
CALWD5 (Calibration Word 5) .................................... 61
CALWD6 (Calibration Word 6) .................................... 62
CALWD7 (Calibration Word 7) .................................... 63
CMPZCON (Compensation Setting Control) .............. 41
CSDGCON (Voltage For Zero Current Control).......... 39
CSGSCON (Current Sense AC Gain Control) ............ 38
DEADCON (Driver Dead Time Control) ...................... 44
DEVICEID (Device ID) ................................................ 80
INTCON (Interrupt Control) ......................................... 93
IOCA (Interrupt-on-Change PORTGPA) ................... 120
IOCB (Interrupt-on-Change PORTGPB) ................... 120
LPCRCON (Slope Compensation Ramp Control)....... 42
OCCON (Output OverCurrent Control) ....................... 37
OOVCON (Output OverVoltage Detect Level Control)46
OPTION_REG (Option) .............................................. 75
OSCTUNE (Oscillator Tuning) .................................... 81
OUVCON (Output Under Voltage Detect Level Control)
46
OVCCON (Output Voltage Set Point Coarse Control) 45
PCON (Power Control) ........................................ 85, 90
PE1(Analog Peripheral Enable 1 Control) .................. 48
PIE1 (Peripheral Interrupt Enable) .............................. 94
PIR1 (Peripheral Interrupt Flag) .................................. 96
PIR2 (Peripheral Interrupt Flag) .................................. 97
PMADRL (Program Memory Address)...................... 104
PMCON1 (Program Memory Control) ....................... 105
PMDATH (Program Memory Data) ........................... 104
PMDATL (Program Memory Data)............................ 104
PMDRH (Program Memory Address)........................ 105
PORTGPA ................................................................ 111
PORTGPB ................................................................ 115
RELEFF (Relative Efficiency Measurement) .............. 65
Reset Values............................................................... 87
SLVGNCON (MASTER Error Signal Input Gain Control)
43
Special Registers Summary...................... 71, 72, 73, 74
SSPCON1(SSP Control)........................................... 183
SSPSTAT (SSP Status) ............................................ 182
SSPxADD (MSSPx Address and Baud Rate, I2C Mode)
186, 187
SSPxCON1 (MSSPx Control 1) ................................ 183
SSPxCON2 (SSPx Control 2) ................................... 184
SSPxCON3 (SSPx Control 3) ................................... 185
SSPxMSK (SSPx Mask) ................................... 186, 187
SSPxSTAT (SSPx Status) ........................................ 182
DS22331A-page 214
STATUS ..................................................................... 69
T1CON (Timer1 Control) .......................................... 136
TRISA (Tri-State PORTA)......................................... 112
TRISGPB ( PORTGPB Tri-State) ............................. 115
TXCON ..................................................................... 139
VINLVL (Input Under Voltage Lockout Control).......... 35
VZCCON (Voltage for Zero Current Control).............. 40
WPUB (Weak Pull-up PORTB)................................. 112
WPUGPA
Weak Pull-up PORTGPA.................................. 112
WPUGPB (Weak Pull-up PORTGPB) ...................... 116
Relative Efficiency Circuity Control..................................... 49
Relative Efficiency Measurement ....................................... 65
Procedure ................................................................... 65
Relative Efficiency Measurement Control........................... 49
Reset .................................................................................. 83
Determining Causes ................................................... 89
Resets................................................................................. 83
Associated Registers .................................................. 90
Revision History................................................................ 209
S
Signal Chain Control........................................................... 49
Sleep
Wake-up from ............................................................. 99
Wake-up Using Interrupts ......................................... 100
Slope Compensation .................................................... 16, 42
Slope Compensation Control.............................................. 49
Software Simulator (MPLAB SIM) .................................... 203
Special Event Trigger ....................................................... 126
Special Function Registers ................................................. 69
Special Registers Summary
Bank 0 ........................................................................ 71
Bank 1 ........................................................................ 72
Bank 2 ........................................................................ 73
Bank 3 ........................................................................ 74
SSPxADD Register................................................... 186, 187
SSPxCON1 Register ........................................................ 183
SSPxCON2 Register ........................................................ 184
SSPxCON3 Register ........................................................ 185
SSPxMSK Register................................................... 186, 187
SSPxOV............................................................................ 172
SSPxOV Status Flag ........................................................ 172
SSPxSTAT Register ......................................................... 182
R/W Bit ..................................................................... 151
Stack................................................................................... 76
Start-up Sequence.............................................................. 85
STATUS Register ............................................................... 69
Switching Frequency .......................................................... 16
System Bench Testing.................................................. 20, 55
 2013 Microchip Technology Inc.
MCP19111
T
T1CON Register ............................................................... 136
T1CKPS1:T1CKPS0 Bits ............................................ 44
Temperature Indicator Module .......................................... 121
Thermal Specifications........................................................ 26
Timer Requirements
RESET, Watchdog Timer, Oscillator Start-up Timer and
Power-up ............................................................ 30
Timer0 ....................................................................... 133, 139
8-Bit Counter Mode................................................... 133
8-bit Timer Mode....................................................... 133
Associated Registers ................................................ 134
External Clock........................................................... 134
Operation .................................................................. 133
Operation During Sleep ............................................ 134
T0CKI........................................................................ 134
Timer0 Module .................................................................. 133
Timer1 ............................................................................... 135
Associated Registers ................................................ 137
Associated registers.................................................. 137
Clock Source Selection............................................. 135
Control Register ........................................................ 136
Interrupt..................................................................... 136
Operation .................................................................. 135
Operation During Sleep ............................................ 136
Prescaler................................................................... 136
Sleep......................................................................... 136
TMR1H Register ....................................................... 135
TMR1L Register........................................................ 135
Timer1 Module .................................................................. 135
Timer2
Associated registers.................................................. 139
Control Register ........................................................ 139
Operation .................................................................. 138
Timer2 Module .................................................................. 138
Timer2/4/6
Associated Registers ................................................ 139
Timers
Timer1
T1CON.............................................................. 136
Timer2/4/6
TXCON ............................................................. 139
Timing Diagrams
Acknowledge Sequence ........................................... 174
Baud Rate Generator with Clock Arbitration ............. 168
BRG Reset Due to SDA Arbitration During Start
Condition........................................................... 177
Bus Collision During a Repeated Start Condition
(Case 1) ............................................................ 178
Bus Collision During a Repeated Start Condition
(Case 2) ............................................................ 178
Bus Collision During a Start Condition (SCL = 0) ..... 177
Bus Collision During a Stop Condition (Case 1) ....... 179
Bus Collision During a Stop Condition (Case 2) ....... 179
Bus Collision During Start Condition (SDA only) ...... 176
Bus Collision for Transmit and Acknowledge............ 175
Capture/Compare/PWM.............................................. 31
Clock Synchronization .............................................. 165
First Start Bit Timing ................................................. 168
I2C Master Mode (7 or 10-Bit Transmission) ............ 171
I2C Master Mode (7-Bit Reception)........................... 173
I2C Stop Condition Receive or Transmit Mode ......... 174
INT Pin Interrupt.......................................................... 92
Power-up Timer .......................................................... 29
Repeat Start Condition.............................................. 169
 2013 Microchip Technology Inc.
Reset .......................................................................... 29
Start-up Timer............................................................. 29
Time-out Sequence
Case 1 ................................................................ 85
Case 2 ................................................................ 86
Case 3 ................................................................ 86
Timer0 ........................................................................ 30
Timer1 ........................................................................ 30
Wake-up from Interrupt............................................. 100
Watchdog Timer ......................................................... 29
Timing Parameter Symbology ............................................ 27
Timing Requirements
CLKOUT and I/O ........................................................ 29
External Clock ............................................................ 28
TRISA Register................................................................. 112
TRISGPA .......................................................................... 110
TRISGPA Register............................................................ 110
TRISGPB Register.................................................... 114, 115
TXCON (Timer2/4/6) Register .......................................... 139
Typical Application Circuit..................................................... 7
Typical Performance Curves .............................................. 51
U
Under Voltage Lockout
Input............................................................................ 35
Unity Gain Buffer ................................................................ 56
V
Voltage For Zero Current.................................................... 40
W
Watchdog Timer (WDT).............................................. 85, 101
Associated Registers................................................ 102
Configuration Word w/ Watchdog Timer................... 102
Operation.................................................................. 101
Period ....................................................................... 101
Programming Considerations ................................... 101
WCOL ....................................................... 168, 170, 172, 174
WCOL Status Flag.................................... 168, 170, 172, 174
WPUB Register................................................................. 112
WPUGPB Register ........................................................... 116
WWW Address ................................................................. 217
WWW, On-Line Support ....................................................... 5
DS22331A-page 215
MCP19111
NOTES:
DS22331A-page 216
 2013 Microchip Technology Inc.
MCP19111
THE MICROCHIP WEB SITE
CUSTOMER SUPPORT
Microchip provides online support via our WWW site at
www.microchip.com. This web site is used as a means
to make files and information easily available to
customers. Accessible by using your favorite Internet
browser, the web site contains the following
information:
Users of Microchip products can receive assistance
through several channels:
• Product Support – Data sheets and errata,
application notes and sample programs, design
resources, user’s guides and hardware support
documents, latest software releases and archived
software
• General Technical Support – Frequently Asked
Questions (FAQ), technical support requests,
online discussion groups, Microchip consultant
program member listing
• Business of Microchip – Product selector and
ordering guides, latest Microchip press releases,
listing of seminars and events, listings of
Microchip sales offices, distributors and factory
representatives
•
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Development Systems Information Line
Customers
should
contact
their
distributor,
representative or field application engineer (FAE) for
support. Local sales offices are also available to help
customers. A listing of sales offices and locations is
included in the back of this document.
Technical support is available through the web site
at: http://microchip.com/support
CUSTOMER CHANGE NOTIFICATION
SERVICE
Microchip’s customer notification service helps keep
customers current on Microchip products. Subscribers
will receive e-mail notification whenever there are
changes, updates, revisions or errata related to a
specified product family or development tool of interest.
To register, access the Microchip web site at
www.microchip.com. Under “Support”, click on “Customer Change Notification” and follow the registration
instructions.
 2013 Microchip Technology Inc.
DS22331A-page 217
MCP19111
READER RESPONSE
It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip
product. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our
documentation can better serve you, please FAX your comments to the Technical Publications Manager at
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Please list the following information, and use this outline to provide us with your comments about this document.
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Device: MCP19111
Literature Number: DS22331A
Questions:
1. What are the best features of this document?
2. How does this document meet your hardware and software development needs?
3. Do you find the organization of this document easy to follow? If not, why?
4. What additions to the document do you think would enhance the structure and subject?
5. What deletions from the document could be made without affecting the overall usefulness?
6. Is there any incorrect or misleading information (what and where)?
7. How would you improve this document?
DS22331A-page 218
 2013 Microchip Technology Inc.
MCP19111
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
[X](1)
PART NO.
Device
X
-
Tape and Reel Temperature
Option
Range
/XX
Package
Device:
MCP19111: Digitally Enhanced Power Analog Controller with
Integrated Synchronous Driver
Tape and Reel
Option:
Blank
T
= Standard packaging (tube)
= Tape and Reel
Temperature
Range:
E
= -40C to +125C
Package:
MQ = 28-lead Plastic Quad Flat, No Lead Package 5x5x0.9 mm Body (QFN)
 2013 Microchip Technology Inc.
(Extended)
Examples:
a)
MCP19111-E/MQ:
Extended temperature,
QFN 5x5 package
a)
MCP19111T-E/MQ:
Tape and Reel,
Extended temperature,
QFN 5x5 package
Note 1:
Tape and Reel identifier only appears in the
catalog part number description. This
identifier is used for ordering purposes and is
not printed on the device package. Check
with your Microchip Sales Office for package
availability with the Tape and Reel option.
DS22331A-page 219
MCP19111
NOTICE TO CUSTOMERS
This product is subject to a license from Power-One®, Inc. related to digital power technology
(DPT) patents owned by Power-One, Inc. This license does not extend to stand-alone power
supply products.
DS22331A-page 220
 2013 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
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INCLUDING BUT NOT LIMITED TO ITS CONDITION,
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devices in life support and/or safety applications is entirely at
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hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
FlashFlex, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,
PICSTART, PIC32 logo, rfPIC, SST, SST Logo, SuperFlash
and UNI/O are registered trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MTP, SEEVAL and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Silicon Storage Technology is a registered trademark of
Microchip Technology Inc. in other countries.
Analog-for-the-Digital Age, Application Maestro, BodyCom,
chipKIT, chipKIT logo, CodeGuard, dsPICDEM,
dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPF, MPLAB
Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, SQI, Serial Quad I/O,
Total Endurance, TSHARC, UniWinDriver, WiperLock, ZENA
and Z-Scale are trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
GestIC and ULPP are registered trademarks of Microchip
Technology Germany II GmbH & Co. & KG, a subsidiary of
Microchip Technology Inc., in other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2013, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 978-1-62076-959-1
QUALITY MANAGEMENT SYSTEM
CERTIFIED BY DNV
== ISO/TS 16949 ==
 2013 Microchip Technology Inc.
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS22331A-page 221
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India - Bangalore
Tel: 91-80-3090-4444
Fax: 91-80-3090-4123
India - New Delhi
Tel: 91-11-4160-8631
Fax: 91-11-4160-8632
Austria - Wels
Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
Denmark - Copenhagen
Tel: 45-4450-2828
Fax: 45-4485-2829
India - Pune
Tel: 91-20-2566-1512
Fax: 91-20-2566-1513
France - Paris
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
Japan - Osaka
Tel: 81-6-6152-7160
Fax: 81-6-6152-9310
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Atlanta
Duluth, GA
Tel: 678-957-9614
Fax: 678-957-1455
Boston
Westborough, MA
Tel: 774-760-0087
Fax: 774-760-0088
Chicago
Itasca, IL
Tel: 630-285-0071
Fax: 630-285-0075
Cleveland
Independence, OH
Tel: 216-447-0464
Fax: 216-447-0643
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
Detroit
Farmington Hills, MI
Tel: 248-538-2250
Fax: 248-538-2260
Indianapolis
Noblesville, IN
Tel: 317-773-8323
Fax: 317-773-5453
Los Angeles
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
Santa Clara
Santa Clara, CA
Tel: 408-961-6444
Fax: 408-961-6445
Toronto
Mississauga, Ontario,
Canada
Tel: 905-673-0699
Fax: 905-673-6509
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
China - Beijing
Tel: 86-10-8569-7000
Fax: 86-10-8528-2104
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
China - Chongqing
Tel: 86-23-8980-9588
Fax: 86-23-8980-9500
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
China - Hangzhou
Tel: 86-571-2819-3187
Fax: 86-571-2819-3189
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
China - Hong Kong SAR
Tel: 852-2943-5100
Fax: 852-2401-3431
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Taiwan - Hsin Chu
Tel: 886-3-5778-366
Fax: 886-3-5770-955
China - Shenzhen
Tel: 86-755-8864-2200
Fax: 86-755-8203-1760
Taiwan - Kaohsiung
Tel: 886-7-213-7828
Fax: 886-7-330-9305
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Taipei
Tel: 886-2-2508-8600
Fax: 886-2-2508-0102
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
DS22331A-page 222
Japan - Tokyo
Tel: 81-3-6880- 3770
Fax: 81-3-6880-3771
11/29/12
 2013 Microchip Technology Inc.