PIC16F57 DATA SHEET (04/18/2007) DOWNLOAD

PIC16F5X
Data Sheet
Flash-Based, 8-Bit CMOS
Microcontroller Series
© 2007 Microchip Technology Inc.
DS41213D
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and may be superseded by updates.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
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
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, Accuron,
dsPIC, KEELOQ, KEELOQ logo, microID, MPLAB, PIC,
PICmicro, PICSTART, PRO MATE, PowerSmart, rfPIC, and
SmartShunt are registered trademarks of Microchip
Technology Incorporated in the U.S.A. and other countries.
AmpLab, FilterLab, Linear Active Thermistor, Migratable
Memory, MXDEV, MXLAB, PS logo, SEEVAL, SmartSensor
and The Embedded Control Solutions Company are
registered trademarks of Microchip Technology Incorporated
in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, ECAN,
ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi,
MPASM, MPLAB Certified logo, MPLIB, MPLINK, PICkit,
PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal,
PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB,
rfPICDEM, Select Mode, Smart Serial, SmartTel, Total
Endurance, UNI/O, WiperLock and ZENA 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.
All other trademarks mentioned herein are property of their
respective companies.
© 2007, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona, Gresham, Oregon and Mountain View, California. 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.
DS41213D-page ii
© 2007 Microchip Technology Inc.
PIC16F5X
Flash-Based, 8-Bit CMOS Microcontroller Series
High-Performance RISC CPU:
Low-Power Features:
• Only 33 single-word instructions to learn
• All instructions are single cycle except for
program branches which are two-cycle
• Two-level deep hardware stack
• Direct, Indirect and Relative Addressing modes
for data and instructions
• Operating speed:
- DC – 20 MHz clock speed
- DC – 200 ns instruction cycle time
• On-chip Flash program memory:
- 512 x 12 on PIC16F54
- 2048 x 12 on PIC16F57
- 2048 x 12 on PIC16F59
• General Purpose Registers (SRAM):
- 25 x 8 on PIC16F54
- 72 x 8 on PIC16F57
- 134 x 8 on PIC16F59
• Operating Current:
- 170 μA @ 2V, 4 MHz, typical
- 15 μA @ 2V, 32 kHz, typical
• Standby Current:
- 500 nA @ 2V, typical
Special Microcontroller Features:
• Power-on Reset (POR)
• Device Reset Timer (DRT)
• Watchdog Timer (WDT) with its own on-chip
RC oscillator for reliable operation
• Programmable Code Protection
• Power-Saving Sleep mode
• In-Circuit Serial Programming™ (ICSP™)
• Selectable oscillator options:
- RC: Low-cost RC oscillator
- XT: Standard crystal/resonator
- HS: High-speed crystal/resonator
- LP: Power-saving, low-frequency crystal
• Packages:
- 18-pin PDIP and SOIC for PIC16F54
- 20-pin SSOP for PIC16F54
- 28-pin PDIP, SOIC and SSOP for PIC16F57
- 40-pin PDIP for PIC16F59
- 44-pin TQFP for PIC16F59
Program Memory
Peripheral Features:
• 12/20/32 I/O pins:
- Individual direction control
- High current source/sink
• 8-bit real-time clock/counter (TMR0) with 8-bit
programmable prescaler
CMOS Technology:
• Wide operating voltage range:
- Industrial: 2.0V to 5.5V
- Extended: 2.0V to 5.5V
• Wide temperature range:
- Industrial: -40°C to 85°C
- Extended: -40°C to 125°C
• High-endurance Flash:
- 100K write/erase cycles
- > 40-year retention
Data Memory
Device
I/O
Flash (words)
SRAM (bytes)
Timers
8-bit
PIC16F54
512
25
12
1
PIC16F57
2048
72
20
1
PIC16F59
2048
134
32
1
© 2007 Microchip Technology Inc.
DS41213D-page 1
PIC16F5X
Pin Diagrams
PDIP, SOIC
18
17
16
15
14
13
12
11
10
RA1
RA0
OSC1/CLKIN
OSC2/CLKOUT
VDD
RB7/ICSPDAT
RB6/ICSPCLK
RB5
RB4
T0CKI
•1
28
MCLR/VPP
VDD
2
27
OSC1/CLKIN
N/C
3
26
VSS
4
25
OSC2/CLKOUT
RC7
N/C
5
24
RC6
RA0
6
23
RA1
7
RA2
8
21
RC5
RC4
RC3
RA3
9
20
RC2
RB0
10
19
RC1
RB1
11
18
RC0
RB2
12
17
RB7/ICSPDAT
RB3
13
16
RB6/ICSPCLK
RB4
14
15
RB5
PIC16F57
•1
2
3
4
5
6
7
8
9
RA2
RA3
T0CKI
MCLR/VPP
VSS
RB0
RB1
RB2
RB3
PIC16F54
PDIP, SOIC
22
SSOP
SSOP
20
19
18
17
16
15
14
13
12
11
PIC16F54
•1
2
3
4
5
6
7
8
9
10
RA2
RA3
T0CKI
MCLR/VPP
VSS
VSS
RB0
RB1
RB2
RB3
RA1
RA0
OSC1/CLKIN
OSC2/CLKOUT
VDD
VDD
RB7/ICSPDAT
RB6/ICSPCLK
RB5
RB4
•1
2
3
4
5
6
7
8
9
10
11
12
13
14
PIC16F57
28
27
26
25
24
23
22
21
20
19
18
17
16
15
MCLR/VPP
OSC1/CLKIN
OSC2/CLKOUT
RC7
RC6
RC5
RC4
RC3
RC2
RC1
RC0
RB7/ICSPDAT
RB6/ICSPCLK
RB5
T0CKI
39
RE7
3
38
RA3
4
37
RE6
RE5
GND
5
36
RE4
RB0
6
35
RB1
7
34
VDD
OSC1/CLKIN
RB2
8
33
RB3
9
32
RB4
10
11
12
RB7/ICSPDAT
13
28
MCLR/VPP
14
27
VDD
15
26
RC0
16
25
GND
RC1
17
24
RD0
RC2
18
23
RC7
RC3
19
22
RC6
RC4
20
21
RC5
PIC16F59
RB5
RB6/ICSPCLK
GND
GND
RB0
OSC2/CLKOUT
RB1
RD7
RB2
RB3
RD6
RB4
RD5
RB5
RB6/ICSPCLK
RD4
RB7/ICSPDAT
RD3
MCLR/VPP
RD2
RD1
31
30
29
44
43
42
41
40
39
38
37
36
35
34
40
2
1
2
3
4
5
6
7
8
9
10
11
PIC16F59
33
32
31
30
29
28
27
26
25
24
23
12
13
14
15
16
17
18
19
20
21
22
•1
RA1
RA2
OSC1/CLKIN
OSC2/CLKOUT
RD7
RD6
RD5
RD4
RD3
RD2
RD1
GND
GND
VDD
VDD
RC0
RC1
RC2
RC3
RC4
RC5
RC6
RC7
RD0
RA0
RA3
RA2
RA1
RA0
T0CKI
RE7
RE6
RE5
RE4
VDD
VDD
TQFP
PDIP, 0.600"
DS41213D-page 2
VSS
T0CKI
VDD
VDD
RA0
RA1
RA2
RA3
RB0
RB1
RB2
RB3
RB4
VSS
© 2007 Microchip Technology Inc.
PIC16F5X
Table of Contents
1.0 General Description...................................................................................................................................................................... 5
2.0 Architectural Overview ................................................................................................................................................................. 7
3.0 Memory Organization ................................................................................................................................................................. 13
4.0 Oscillator Configurations ............................................................................................................................................................ 21
5.0 Reset .......................................................................................................................................................................................... 23
6.0 I/O Ports ..................................................................................................................................................................................... 29
7.0 Timer0 Module and TMR0 Register ........................................................................................................................................... 33
8.0 Special Features of the CPU...................................................................................................................................................... 37
9.0 Instruction Set Summary ............................................................................................................................................................ 41
10.0 Development Support................................................................................................................................................................. 53
11.0 Electrical Specifications for PIC16F54/57 .................................................................................................................................. 57
11.0 Electrical Specifications for PIC16F59 (continued) .................................................................................................................... 58
12.0 Packaging Information................................................................................................................................................................ 69
The Microchip Web Site ....................................................................................................................................................................... 83
Customer Change Notification Service ................................................................................................................................................ 83
Customer Support ................................................................................................................................................................................ 83
Reader Response ................................................................................................................................................................................ 84
Product Identification System .............................................................................................................................................................. 85
TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip
products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and
enhanced as new volumes and updates are introduced.
If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via
E-mail at [email protected] or fax the Reader Response Form in the back of this data sheet to (480) 792-4150. We
welcome your feedback.
Most Current Data Sheet
To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at:
http://www.microchip.com
You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.
The last character of the literature number is the version number, (e.g., DS30000A is version A of document DS30000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current
devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revision
of silicon and revision of document to which it applies.
To determine if an errata sheet exists for a particular device, please check with one of the following:
• Microchip’s Worldwide Web site; http://www.microchip.com
• Your local Microchip sales office (see last page)
When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature number) you are
using.
Customer Notification System
Register on our web site at www.microchip.com to receive the most current information on all of our products.
© 2007 Microchip Technology Inc.
DS41213D-page 3
PIC16F5X
NOTES:
DS41213D-page 4
© 2007 Microchip Technology Inc.
PIC16F5X
1.0
GENERAL DESCRIPTION
1.1
The PIC16F5X from Microchip Technology is a family
of low-cost, high-performance, 8-bit, fully static, Flashbased CMOS microcontrollers. It employs a RISC
architecture with only 33 single-word/single-cycle
instructions. All instructions are single cycle except for
program branches which take two cycles. The
PIC16F5X delivers performance an order of magnitude
higher than its competitors in the same price category.
The 12-bit wide instructions are highly symmetrical
resulting in 2:1 code compression over other 8-bit
microcontrollers in its class. The easy-to-use and easyto-remember instruction set reduces development time
significantly.
The PIC16F5X products are equipped with special
features that reduce system cost and power requirements. The Power-on Reset (POR) and Device Reset
Timer (DRT) eliminate the need for external Reset
circuitry. There are four oscillator configurations to
choose from, including the power-saving LP (Low
Power) oscillator and cost saving RC oscillator. Powersaving Sleep mode, Watchdog Timer and code protection features improve system cost, power and reliability.
Applications
The PIC16F5X series fits perfectly in applications ranging from high-speed automotive and appliance motor
control to low-power remote transmitters/receivers,
pointing devices and telecom processors. The Flash
technology makes customizing application programs
(transmitter
codes,
motor
speeds,
receiver
frequencies, etc.) extremely fast and convenient. The
small footprint packages, for through hole or surface
mounting, make this microcontroller series perfect for
applications with space limitations. Low-cost, lowpower, high performance, ease of use and I/O flexibility
make the PIC16F5X series very versatile, even in
areas where no microcontroller use has been
considered before (e.g., timer functions, replacement
of “glue” logic in larger systems, co-processor
applications).
The PIC16F5X products are supported by a full-featured
macro assembler, a software simulator, a low-cost development programmer and a full featured programmer. All
the tools are supported on IBM® PC and compatible
machines.
TABLE 1-1:
PIC16F5X FAMILY OF DEVICES
Features
Maximum Operation Frequency
Flash Program Memory (x12 words)
RAM Data Memory (bytes)
Timer Module(s)
PIC16F54
PIC16F57
PIC16F59
20 MHz
20 MHz
20 MHz
512
2K
2K
25
72
134
TMR0
TMR0
TMR0
I/O Pins
12
20
32
Number of Instructions
33
33
33
18-pin DIP, SOIC;
20-pin SSOP
28-pin DIP, SOIC;
28-pin SSOP
40-pin DIP, 44-pin TQFP
Packages
Note:
All PIC® Family devices have Power-on Reset, selectable Watchdog Timer, selectable code-protect and
high I/O current capability.
© 2007 Microchip Technology Inc.
DS41213D-page 5
PIC16F5X
NOTES:
DS41213D-page 6
© 2007 Microchip Technology Inc.
PIC16F5X
2.0
ARCHITECTURAL OVERVIEW
The high performance of the PIC16F5X family can be
attributed to a number of architectural features
commonly found in RISC microprocessors. To begin
with, the PIC16F5X uses a Harvard architecture in
which program and data are accessed on separate
buses. This improves bandwidth over traditional von
Neumann architecture where program and data are
fetched on the same bus. Separating program and data
memory further allows instructions to be sized differently than the 8-bit wide data word. Instruction opcodes
are 12-bits wide, making it possible to have all singleword instructions. A 12-bit wide program memory
access bus fetches a 12-bit instruction in a single cycle.
A two-stage pipeline overlaps fetch and execution of
instructions. Consequently, all instructions (33) execute
in a single cycle except for program branches.
The PIC16F54 addresses 512 x 12 of program
memory, the PIC16F57 and PIC16F59 addresses
2048 x 12 of program memory. All program memory is
internal.
The PIC16F5X can directly or indirectly address its
register files and data memory. All Special Function
Registers (SFR), including the program counter, are
mapped in the data memory. The PIC16F5X has a
highly orthogonal (symmetrical) instruction set that
makes it possible to carry out any operation on any register using any Addressing mode. This symmetrical
nature and lack of ‘special optimal situations’ make programming with the PIC16F5X simple, yet efficient. In
addition, the learning curve is reduced significantly.
© 2007 Microchip Technology Inc.
The PIC16F5X device contains an 8-bit ALU and working register. The ALU is a general purpose arithmetic
unit. It performs arithmetic and Boolean functions
between data in the working register and any register
file.
The ALU is 8-bits wide and capable of addition,
subtraction, shift and logical operations. Unless otherwise mentioned, arithmetic operations are two's
complement in nature. In two-operand instructions,
typically one operand is the W (working) register. The
other operand is either a file register or an immediate
constant. In single operand instructions, the operand is
either the W register or a file register.
The W register is an 8-bit working register used for ALU
operations. It is not an addressable register.
Depending on the instruction executed, the ALU may
affect the values of the Carry (C), Digit Carry (DC) and
Zero (Z) bits in the STATUS Register. The C and DC
bits operate as a borrow and digit borrow out bit,
respectively, in subtraction. See the SUBWF and ADDWF
instructions for examples.
A simplified block diagram is shown in Figure 2-1 with
the corresponding device pins described in Table 2-1
(for PIC16F54), Table 2-2 (for PIC16F57) and
Table 2-3 (for PIC16F59).
DS41213D-page 7
PIC16F5X
FIGURE 2-1:
Flash
512 X 12 (F54)
2048 X 12(F57)
2048 x 12(F59)
PIC16F5X SERIES BLOCK DIAGRAM
9-11
9-11
T0CKI
Pin
Stack 1
Stack 2
OSC1 OSC2 MCLR
Configuration Word
“Disable”
“Osc
Select”
PC
Watchdog
Timer
12
2
“CodeProtect”
Oscillator/
Timing &
Control
Instruction
Register
9
CLKOUT
WDT/TMR0
Prescaler
WDT
Time-out
12
8
“Sleep”
Instruction
Decoder
6
“Option”
Option Reg.
Direct Address
Direct RAM
Address
From W
5
5-7
8
Literals
STATUS
TMR0
General
Purpose
Register
File
(SRAM)
25, 72 or 134
Bytes
SFR
8
W
Data Bus
ALU
8
From W
4
TRISA
From W
4
From W
8
8
TRISB
PORTA
PORTB
4
8
“TRIS 6”
“TRIS 5”
RA<3:0>
8
4
PORTC
8
“TRIS 7”
RC<7:0>
PIC16F57/59
only
PORTE
8
8
TRISD
PORTD
8
4
“TRIS 9”
RE<7:4>
PIC16F59
only
DS41213D-page 8
TRISC
From W
From W
TRISE
RB<7:0>
8
8
“TRIS 8”
RD<7:0>
PIC16F59
only
© 2007 Microchip Technology Inc.
PIC16F5X
TABLE 2-1:
PIC16F54 PINOUT DESCRIPTION
Function
Input
Type
Output
Type
RA0
RA0
TTL
CMOS
Bidirectional I/O pin
RA1
RA1
TTL
CMOS
Bidirectional I/O pin
RA2
RA2
TTL
CMOS
Bidirectional I/O pin
RA3
RA3
TTL
CMOS
Bidirectional I/O pin
RB0
RB0
TTL
CMOS
Bidirectional I/O pin
RB1
RB1
TTL
CMOS
Bidirectional I/O pin
RB2
RB2
TTL
CMOS
Bidirectional I/O pin
RB3
RB3
TTL
CMOS
Bidirectional I/O pin
RB4
RB4
TTL
CMOS
Bidirectional I/O pin
RB5
RB5
TTL
CMOS
Bidirectional I/O pin
RB6/ICSPCLK
RB6
TTL
CMOS
Bidirectional I/O pin
Name
RB7/ICSPDAT
Description
ICSPCLK
ST
—
RB7
TTL
CMOS
Bidirectional I/O pin
Serial Programming Clock
Serial Programming I/O
ICSPDAT
ST
CMOS
T0CKI
T0CKI
ST
—
Clock input to Timer0. Must be tied to VSS or VDD, if not in use, to
reduce current consumption.
MCLR/VPP
MCLR
ST
—
Active-low Reset to device. Voltage on the MCLR/VPP pin must
not exceed VDD to avoid unintended entering of Programming
mode.
VPP
HV
—
Programming voltage input
OSC1/CLKIN
OSC2/CLKOUT
VDD
VSS
Legend: I
O
ST
OSC1
XTAL
—
Oscillator crystal input
CLKIN
ST
—
External clock source input
OSC2
—
XTAL
CLKOUT
—
CMOS
VDD
Power
—
VSS
Power
—
= input
= output
= Schmitt Trigger input
© 2007 Microchip Technology Inc.
Oscillator crystal output. Connects to crystal or resonator in
Crystal Oscillator mode.
In RC mode, OSC2 pin can output CLKOUT, which has 1/4 the
frequency of OSC1.
Positive supply for logic and I/O pins
Ground reference for logic and I/O pins
I/O = input/output
—
= Not Used
TTL = TTL input
CMOS = CMOS output
XTAL = Crystal input/output
HV
= High Voltage
DS41213D-page 9
PIC16F5X
TABLE 2-2:
PIC16F57 PINOUT DESCRIPTION
Function
Input
Type
Output
Type
RA0
RA0
TTL
CMOS
Bidirectional I/O pin
RA1
RA1
TTL
CMOS
Bidirectional I/O pin
RA2
RA2
TTL
CMOS
Bidirectional I/O pin
RA3
RA3
TTL
CMOS
Bidirectional I/O pin
RB0
RB0
TTL
CMOS
Bidirectional I/O pin
RB1
RB1
TTL
CMOS
Bidirectional I/O pin
RB2
RB2
TTL
CMOS
Bidirectional I/O pin
RB3
RB3
TTL
CMOS
Bidirectional I/O pin
RB4
RB4
TTL
CMOS
Bidirectional I/O pin
RB5
RB5
TTL
CMOS
Bidirectional I/O pin
RB6/ICSPCLK
RB6
TTL
CMOS
Bidirectional I/O pin
Name
RB7/ICSPDAT
Description
ICSPCLK
ST
—
RB7
TTL
CMOS
Bidirectional I/O pin
Serial programming clock
ICSPDAT
ST
CMOS
Serial programming I/O
RC0
RC0
TTL
CMOS
Bidirectional I/O pin
RC1
RC1
TTL
CMOS
Bidirectional I/O pin
RC2
RC2
TTL
CMOS
Bidirectional I/O pin
RC3
RC3
TTL
CMOS
Bidirectional I/O pin
RC4
RC4
TTL
CMOS
Bidirectional I/O pin
RC5
RC5
TTL
CMOS
Bidirectional I/O pin
RC6
RC6
TTL
CMOS
Bidirectional I/O pin
Bidirectional I/O pin
RC7
RC7
TTL
CMOS
T0CKI
T0CKI
ST
—
Clock input to Timer0. Must be tied to VSS or VDD, if not in use, to
reduce current consumption.
MCLR/VPP
MCLR
ST
—
Active-low Reset to device. Voltage on the MCLR/VPP pin must
not exceed VDD to avoid unintended entering of Programming
mode.
VPP
HV
—
Programming voltage input
OSC1/CLKIN
OSC1
XTAL
—
Oscillator crystal input
CLKIN
ST
—
External clock source input
OSC2
—
XTAL
Oscillator crystal output. Connects to crystal or resonator in
Crystal Oscillator mode.
CLKOUT
—
CMOS
In RC mode, OSC2 pin outputs CLKOUT, which has 1/4 the
frequency of OSC1.
VDD
VDD
Power
—
VSS
VSS
Power
—
Ground reference for logic and I/O pins
N/C
N/C
—
—
Unused, do not connect
OSC2/CLKOUT
Legend: I = input
O = output
ST = Schmitt Trigger input
DS41213D-page 10
Positive supply for logic and I/O pins
I/O = input/output
— = Not Used
TTL = TTL input
CMOS = CMOS output
XTAL = Crystal input/output
HV
= High Voltage
© 2007 Microchip Technology Inc.
PIC16F5X
TABLE 2-3:
PIC16F59 PINOUT DESCRIPTION
Function
Input
Type
Output
Type
RA0
RA0
TTL
CMOS
Bidirectional I/O pin
RA1
RA1
TTL
CMOS
Bidirectional I/O pin
RA2
RA2
TTL
CMOS
Bidirectional I/O pin
RA3
RA3
TTL
CMOS
Bidirectional I/O pin
RB0
RB0
TTL
CMOS
Bidirectional I/O pin
RB1
RB1
TTL
CMOS
Bidirectional I/O pin
RB2
RB2
TTL
CMOS
Bidirectional I/O pin
RB3
RB3
TTL
CMOS
Bidirectional I/O pin
RB4
RB4
TTL
CMOS
Bidirectional I/O pin
RB5
RB5
TTL
CMOS
Bidirectional I/O pin
RB6/ICSPCLK
RB6
TTL
CMOS
ICSPCLK
ST
—
Name
RB7/ICSPDAT
Description
Bidirectional I/O pin
Serial programming clock
RB7
TTL
CMOS
Bidirectional I/O pin
ICSPDAT
ST
CMOS
Serial programming I/O
RC0
RC0
TTL
CMOS
Bidirectional I/O pin
RC1
RC1
TTL
CMOS
Bidirectional I/O pin
RC2
RC2
TTL
CMOS
Bidirectional I/O pin
RC3
RC3
TTL
CMOS
Bidirectional I/O pin
RC4
RC4
TTL
CMOS
Bidirectional I/O pin
RC5
RC5
TTL
CMOS
Bidirectional I/O pin
RC6
RC6
TTL
CMOS
Bidirectional I/O pin
RC7
RC7
TTL
CMOS
Bidirectional I/O pin
RD0
RD0
TTL
CMOS
Bidirectional I/O pin
RD1
RD1
TTL
CMOS
Bidirectional I/O pin
RD2
RD2
TTL
CMOS
Bidirectional I/O pin
RD3
RD3
TTL
CMOS
Bidirectional I/O pin
RD4
RD4
TTL
CMOS
Bidirectional I/O pin
RD5
RD5
TTL
CMOS
Bidirectional I/O pin
RD6
RD6
TTL
CMOS
Bidirectional I/O pin
RD7
RD7
TTL
CMOS
Bidirectional I/O pin
RE4
RE4
TTL
CMOS
Bidirectional I/O pin
RE5
RE5
TTL
CMOS
Bidirectional I/O pin
RE6
RE6
TTL
CMOS
Bidirectional I/O pin
RE7
RE7
TTL
CMOS
T0CKI
T0CKI
ST
—
Clock input to Timer0. Must be tied to VSS or VDD, if not in use, to reduce
current consumption.
MCLR/VPP
MCLR
ST
—
Active-low Reset to device. Voltage on the MCLR/VPP pin must not
exceed VDD to avoid unintended entering of Programming mode.
VPP
HV
—
Programming voltage input
OSC1/CLKIN
OSC1
XTAL
—
Oscillator crystal input
CLKIN
ST
—
OSC2
—
XTAL
Oscillator crystal output. Connects to crystal or resonator in Crystal
Oscillator mode.
CLKOUT
—
CMOS
In RC mode, OSC2 pin outputs CLKOUT, which has 1/4 the frequency of
OSC1.
OSC2/CLKOUT
Bidirectional I/O pin
External clock source input
VDD
VDD
Power
—
Positive supply for logic and I/O pins
VSS
VSS
Power
—
Ground reference for logic and I/O pins
Legend:
I = input
O = output
ST = Schmitt Trigger input
© 2007 Microchip Technology Inc.
I/O = input/output
—
= Not Used
TTL = TTL input
CMOS
XTAL
HV
= CMOS output
= Crystal input/output
= High Voltage
DS41213D-page 11
PIC16F5X
2.1
Clocking Scheme/Instruction
Cycle
2.2
Instruction Flow/Pipelining
An instruction cycle consists of four Q cycles (Q1, Q2,
Q3 and Q4). The instruction fetch and execute are
pipelined such that fetch takes one instruction cycle,
while decode and execute takes another instruction
cycle. However, due to the pipelining, each instruction
effectively executes in one cycle. If an instruction
causes the Program Counter to change (e.g., GOTO),
then two cycles are required to complete the instruction
(Example 2-1).
The clock input (OSC1/CLKIN pin) is internally divided
by four to generate four non-overlapping quadrature
clocks, namely Q1, Q2, Q3 and Q4. Internally, the
Program Counter (PC) is incremented every Q1 and
the instruction is fetched from program memory and
latched into the instruction register in Q4. It is decoded
and executed during the following Q1 through Q4. The
clocks and instruction execution flow are shown in
Figure 2-2 and Example 2-1.
A fetch cycle begins with the Program Counter (PC)
incrementing in Q1.
In the execution cycle, the fetched instruction is latched
into the instruction register in cycle Q1. This instruction
is then decoded and executed during the Q2, Q3 and
Q4 cycles. Data memory is read during Q2 (operand
read) and written during Q4 (destination write).
FIGURE 2-2:
CLOCK/INSTRUCTION CYCLE
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
OSC1
Q1
Q2
Internal
phase
clock
Q3
Q4
PC
PC
OSC2/CLKOUT
(RC mode)
EXAMPLE 2-1:
PC + 1
Fetch INST (PC)
Execute INST (PC - 1)
PC + 2
Fetch INST (PC + 1)
Execute INST (PC)
Fetch INST (PC + 2)
Execute INST (PC + 1)
INSTRUCTION PIPELINE FLOW
1. MOVLW H'55'
2. MOVWF PORTB
3. CALL
SUB_1
4. BSF
PORTA, BIT3
Fetch 1
Execute 1
Fetch 2
Execute 2
Fetch 3
Execute 3
Fetch 4
Flush
Fetch SUB_1 Execute SUB_1
All instructions are single cycle, except for any program branches. These take two cycles since the fetch instruction
is “flushed” from the pipeline, while the new instruction is being fetched and then executed.
DS41213D-page 12
© 2007 Microchip Technology Inc.
PIC16F5X
3.0
MEMORY ORGANIZATION
PIC16F5X memory is organized into program memory
and data memory. For the PIC16F57 and PIC16F59,
which have more than 512 words of program memory,
a paging scheme is used. Program memory pages are
accessed using one or two STATUS register bits. For
the PIC16F57 and PIC16F59, which have a data memory register file of more than 32 registers, a banking
scheme is used. Data memory banks are accessed
using the File Selection Register (FSR).
A NOP at the Reset vector location will cause a restart
at location 000h. The Reset vector for the PIC16F54 is
at 1FFh. The Reset vector for the PIC16F57 and
PIC16F59 is at 7FFh. See Section 3.5 “Program
Counter” for additional information using CALL and
GOTO instructions.
FIGURE 3-1:
11
CALL, RETLW
Stack Level 1
Stack Level 2
000h
On-chip Program
Memory (Page 0)
Program Memory Organization
The PIC16F54 has a 9-bit Program Counter (PC)
capable of addressing a 512 x 12 program memory
space (Figure 3-1). The PIC16F57 and PIC16F59 have
an 11-bit Program Counter capable of addressing a 2K
x 12 program memory space (Figure 3-2). Accessing a
location above the physically implemented address will
cause a wraparound.
PIC16F57/PIC16F59
PROGRAM MEMORY MAP
AND STACK
PC<10:0>
0FFh
100h
1FFh
200h
User Memory
Space
3.1
FIGURE 3-2:
On-chip Program
Memory (Page 1)
2FFh
300h
3FFh
400h
On-chip Program
Memory (Page 2)
4FFh
500h
5FFh
600h
On-chip Program
Memory (Page 3)
6FFh
700h
Reset Vector
7FFh
PIC16F54 PROGRAM
MEMORY MAP AND
STACK
PC<8:0>
9
CALL, RETLW
Stack Level 1
Stack Level 2
User Memory
Space
000h
On-chip
Program
Memory
0FFh
100h
Reset Vector
1FFh
© 2007 Microchip Technology Inc.
DS41213D-page 13
PIC16F5X
3.2
3.2.1
Data Memory Organization
Data memory is composed of registers or bytes of
RAM. Therefore, data memory for a device is specified
by its register file. The register file is divided into two
functional groups: Special Function Registers (SFR)
and General Purpose Registers (GPR).
GENERAL PURPOSE REGISTER
FILE
The register file is accessed either directly or indirectly
through the File Select Register (FSR). The FSR
register is described in Section 3.7 “Indirect Data
Addressing; INDF and FSR Registers”.
The Special Function Registers include the TMR0
register, the Program Counter (PC), the STATUS register, the I/O registers (ports) and the File Select Register
(FSR). In addition, Special Purpose Registers are used
to control the I/O port configuration and prescaler
options.
FIGURE 3-3:
File Address
The General Purpose Registers are used for data and
control information under command of the instructions.
For the PIC16F54, the register file is composed of 7
Special Function Registers and 25 General Purpose
Registers (Figure 3-3).
For the PIC16F57, the register file is composed of 8
Special Function Registers, 8 General Purpose
Registers and 64 additional General Purpose
Registers that may be addressed using a banking
scheme (Figure 3-4).
00h
INDF(1)
01h
TMR0
02h
PCL
03h
STATUS
04h
FSR
05h
PORTA
06h
PORTB
07h
General
Purpose
Registers
For the PIC16F59, the register file is composed of 10
Special Function Registers, 6 General Purpose
Registers and 128 additional General Purpose
Registers that may be addressed using a banking
scheme (Figure 3-5).
FIGURE 3-4:
PIC16F54 REGISTER FILE
MAP
1Fh
Note 1:
Not a physical register. See Section 3.7
“Indirect Data Addressing; INDF and FSR
Registers”.
PIC16F57 REGISTER FILE MAP
FSR<6:5>
00
01
10
11
File Address
00h
INDF(1)
01h
TMR0
02h
PCL
03h
STATUS
04h
FSR
05h
PORTA
06h
PORTB
07h
PORTC
08h
General
Purpose
Registers
0Fh
10h
20h
2Fh
4Fh
6Fh
30h
50h
70h
Note 1:
DS41213D-page 14
General
Purpose
Registers
3Fh
Bank 0
60h
Addresses map back to
addresses in Bank 0.
General
Purpose
Registers
1Fh
40h
General
Purpose
Registers
5Fh
Bank 1
General
Purpose
Registers
7Fh
Bank 2
Bank 3
Not a physical register. See Section 3.7 “Indirect Data Addressing; INDF and FSR Registers”.
© 2007 Microchip Technology Inc.
PIC16F5X
FIGURE 3-5:
PIC16F59 REGISTER FILE MAP
FSR<7:5>
000
001
010
011
100
101
110
111
File Address
00h
INDF(1)
01h
TMR0
02h
PCL
03h
STATUS
04h
FSR
05h
PORTA
06h
PORTB
07h
PORTC
08h
PORTD
09h
PORTE
20h
40h
60h
80h
A0h
C0h
E0h
Addresses map back to addresses in Bank 0.
0Ah
0Fh
General
Purpose
Registers
10h
General
Purpose
Registers
1Fh
Bank 0
Note 1:
2Fh
4Fh
6Fh
8Fh
AFh
CFh
EFh
30h
General
Purpose
Registers
3Fh
50h
General
Purpose
Registers
5Fh
70h
General
Purpose
Registers
7Fh
90h
General
Purpose
Registers
9Fh
B0h
General
Purpose
Registers
BFh
D0h
General
Purpose
Registers
DFh
F0h
General
Purpose
Registers
FFh
Bank 2
Bank 3
Bank 4
Bank 5
Bank 6
Bank 7
Bank 1
Not a physical register.
© 2007 Microchip Technology Inc.
DS41213D-page 15
PIC16F5X
3.2.2
SPECIAL FUNCTION REGISTERS
The Special Function Registers (SFR) are registers
used by the CPU and peripheral functions to control the
operation of the device (Table 3-1).
The Special Function Registers can be classified into
two sets. The Special Function Registers associated
with the “core” functions are described in this section.
Those related to the operation of the peripheral
features are described in the section for each
peripheral feature.
TABLE 3-1:
Address
SPECIAL FUNCTION REGISTER SUMMARY
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
Power-on
Reset
Details
on Page
N/A
TRIS
I/O Control Registers (TRISA, TRISB, TRISC, TRISD, TRISE)
1111 1111
29
N/A
OPTION
Contains control bits to configure Timer0 and Timer0/WDT
prescaler
--11 1111
18
00h
INDF
Uses contents of FSR to address data memory (not a physical
register)
xxxx xxxx
20
01h
TMR0
Timer0 Module Register
xxxx xxxx
34
02h
PCL(1)
Low order 8 bits of PC
1111 1111
19
03h
STATUS
0001 1xxx
17
04h
FSR(3)
Indirect data memory Address Pointer
111x xxxx
20
04h
FSR(4)
Indirect data memory Address Pointer
1xxx xxxx
20
04h
(5)
FSR
Indirect data memory Address Pointer
xxxx xxxx
20
05h
PORTA(6)
---- xxxx
29
PA2
—
PA1
—
PA0
—
TO
—
PD
RA3
Z
RA2
DC
RA1
C
RA0
06h
PORTB
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0
xxxx xxxx
29
07h
PORTC(2)
RC7
RC6
RC5
RC4
RC3
RC2
RC1
RC0
xxxx xxxx
29
08h
PORTD(7)
RD7
RD6
RD5
RD4
RD3
RD2
RD1
RD0
xxxx xxxx
29
09h
PORTE(6), (7)
RE7
RE6
RE5
RE4
—
—
—
—
xxxx ----
29
Legend: Shaded cells = unimplemented or unused, – = unimplemented, read as ‘0’ (if applicable), x = unknown,
u = unchanged
Note 1: The upper byte of the Program Counter is not directly accessible. See Section 3.5 “Program Counter”
for an explanation of how to access these bits.
2: File address 07h is a General Purpose Register on the PIC16F54.
3: PIC16F54 only.
4: PIC16F57 only.
5: PIC16F59 only.
6: Unimplemented bits are read as ‘0’s.
7: File address 08h and 09h are General Purpose Registers on the PIC16F54 and PIC16F57.
DS41213D-page 16
© 2007 Microchip Technology Inc.
PIC16F5X
3.3
STATUS Register
This register contains the arithmetic status of the ALU,
the Reset status and the page preselect bits for
program memories larger than 512 words.
The STATUS register can be the destination for any
instruction, as with 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.
REGISTER 3-1:
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).
Therefore, it is recommended that only BCF, BSF,
MOVWF and SWAPF instructions be used to alter the
STATUS register because these instructions do not
affect the Z, DC or C bits from the STATUS register. For
other instructions which do affect Status bits, see
Section 9.0 “Instruction Set Summary”.
STATUS REGISTER (ADDRESS: 03h)
R/W-0
R/W-0
R/W-0
R-1
R-1
R/W-x
R/W-x
R/W-x
PA2
PA1
PA0
TO
PD
Z
DC
C
bit 7
bit 0
bit 7
PA2: Reserved, do not use
Use of the PA2 bit as a general purpose read/write bit is not recommended, since this may affect upward
compatibility with future products.
bit 6-5
PA<1:0>: Program Page Preselect bits (PIC16F57/PIC16F59)
00 = Page 0 (000h-1FFh)
01 = Page 1 (200h-3FFh)
10 = Page 2 (400h-5FFh)
11 = Page 3 (600h-7FFh)
Each page is 512 words. Using the PA<1:0> bits as general purpose read/write bits in devices which do
not use them for program page preselect is not recommended. This may affect upward compatibility with
future products.
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/Borrow bit (for ADDWF and SUBWF instructions)
ADDWF
1 = A carry to the 4th low order bit of the result occurred
0 = A carry from the 4th low order bit of the result did not occur
SUBWF
1 = A borrow to the 4th low order bit of the result did not occur
0 = A borrow from the 4th low order bit of the result occurred
bit 0
C: Carry/Borrow bit (for ADDWF, SUBWF and RRF, RLF instructions)
ADDWF
SUBWF
RRF or RLF
1 = A carry occurred
1 = A borrow did not occur Loaded with LSb or MSb, respectively
0 = A carry did not occur
0 = A borrow occurred
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
© 2007 Microchip Technology Inc.
x = Bit is unknown
DS41213D-page 17
PIC16F5X
3.4
Option Register
The Option register is a 6-bit wide, write-only register
which contains various control bits to configure the
Timer0/WDT prescaler and Timer0.
By executing the OPTION instruction, the contents of
the W register will be transferred to the Option register.
A Reset sets the Option<5:0> bits.
REGISTER 3-2:
OPTION REGISTER
U-0
U-0
W-1
W-1
W-1
W-1
W-1
W-1
—
—
T0CS
T0SE
PSA
PS2
PS1
PS0
bit 7
bit 0
bit 7-6
Unimplemented: Read as ‘0’
bit 5
T0CS: Timer0 Clock Source Select bit
1 = Transition on T0CKI pin
0 = Internal instruction cycle clock (CLKOUT)
bit 4
T0SE: Timer0 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 assigned to the WDT
0 = Prescaler assigned to Timer0
bit 2-0
PS<2:0>: Prescaler rate select bits
Bit Value
Timer0 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
Legend:
DS41213D-page 18
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
© 2007 Microchip Technology Inc.
PIC16F5X
3.5
FIGURE 3-7:
Program Counter
As a program instruction is executed, the Program
Counter (PC) will contain the address of the next
program instruction to be executed. The PC value is
increased by one, every instruction cycle, unless an
instruction changes the PC.
LOADING OF PC BRANCH
INSTRUCTIONS – PIC16F57
AND PIC16F59
GOTO Instruction
10
9
8 7
PCL
For a GOTO instruction, bits 8:0 of the PC are provided
by the GOTO instruction word. The PC Latch (PCL) is
mapped to PC<7:0> (Figure 3-6 and Figure 3-7).
Instruction Word
2
For the PIC16F57 and PIC16F59, a page number must
be supplied as well. Bit 5 and bit 6 of the STATUS register provide page information to bit 9 and bit 10 of the
PC (Figure 3-6 and Figure 3-7).
For a CALL instruction, or any instruction where the
PCL is the destination, bits 7:0 of the PC again are
provided by the instruction word. However, PC<8>
does not come from the instruction word, but is always
cleared (Figure 3-6 and Figure 3-7).
0
Status
CALL or Modify PCL Instruction
10
FIGURE 3-6:
LOADING OF PC BRANCH
INSTRUCTIONS – PIC16F54
GOTO Instruction
8
7
0
PCL
PC
CALL or Modify PCL Instruction
PC
Reset to '0'
7
Instruction Word
0
PCL
Instruction Word
2
Reset to ‘0’
PA<1:0>
7
0
Status
3.5.1
PAGING CONSIDERATIONS
PIC16F57 AND PIC16F59
If the PC is pointing to the last address of a selected
memory page, when it increments, it will cause the program to continue in the next higher page. However, the
page preselect bits in the STATUS register will not be
updated. Therefore, the next GOTO, CALL or MODIFY
PCL instruction will send the program to the page
specified by the page preselect bits (PA0 or PA<1:0>).
For example, a NOP at location 1FFh (page 0)
increments the PC to 200h (page 1). A GOTO xxx at
200h will return the program to address xxh on page 0
(assuming that PA<1:0> are clear).
3.5.2
0
PCL
8 7
To prevent this, the page preselect bits must be
updated under program control.
Instruction Word
8
9
PC
For the PIC16F57 and PIC16F59, a page number
again must be supplied. Bit 5 and bit 6 of the STATUS
register provide page information to bit 9 and bit 10 of
the PC (Figure 3-6 and Figure 3-7).
Because PC<8> is cleared in the CALL
instruction or any modified PCL instruction, all subroutine calls or computed
jumps are limited to the first 256 locations
of any program memory page (512 words
long).
PA<1:0>
7
Instructions where the PCL is the destination or modify
PCL instructions, include MOVWF PCL, ADDWF PCL,
and BSF PCL,5.
Note:
0
PC
EFFECTS OF RESET
The PC is set upon a Reset, which means that the PC
addresses the last location in the last page (i.e., the
Reset vector).
The STATUS register page preselect bits are cleared
upon a Reset, which means that page 0 is preselected.
Therefore, upon a Reset, a GOTO instruction at the
Reset vector location will automatically cause the
program to jump to page 0.
© 2007 Microchip Technology Inc.
DS41213D-page 19
PIC16F5X
3.6
Stack
The PIC16F54 device has a 9-bit wide, two-level hardware PUSH/POP stack. The PIC16F57 and PIC16F59
devices have an 11-bit wide, two-level hardware
PUSH/POP stack.
A CALL instruction will PUSH the current value of stack 1
into stack 2 and then PUSH the current program counter
value, incremented by one, into stack level 1. If more than
two sequential CALL’s are executed, only the most recent
two return addresses are stored.
A RETLW instruction will POP the contents of stack level
1 into the program counter and then copy stack level 2
contents into level 1. If more than two sequential
RETLW’s are executed, the stack will be filled with the
address previously stored in level 2.
Note:
The W register will be loaded with the
literal value specified in the instruction.
This is particularly useful for the
implementation of data look-up tables
within the program memory.
For the RETLW instruction, the PC is loaded with the
Top-of-Stack (TOS) contents. All of the devices covered in this data sheet have a two-level stack. The
stack has the same bit width as the device PC, therefore, paging is not an issue when returning from a subroutine.
3.7
Indirect Data Addressing; INDF
and FSR Registers
The INDF register is not a physical register. Addressing
INDF actually addresses the register whose address is
contained in the FSR Register (FSR is a pointer). This
is indirect addressing.
EXAMPLE 3-1:
INDIRECT ADDRESSING
•
•
•
•
Register file 08 contains the value 10h
Register file 09 contains the value 0Ah
Load the value 08 into the FSR register
A read of the INDF register will return the value
of 10h
• Increment the value of the FSR register by one
(FSR = 09h)
• A read of the INDF register now will return the
value of 0Ah.
Reading INDF itself indirectly (FSR = 0) will produce
00h. Writing to the INDF register indirectly results in a
no-operation (although Status bits may be affected).
A simple program to clear RAM locations 10h-1Fh
using indirect addressing is shown in Example 3-2.
EXAMPLE 3-2:
NEXT
MOVLW
MOVWF
CLRF
INCF
BTFSC
GOTO
HOW TO CLEAR RAM
USING INDIRECT
ADDRESSING
H'10'
FSR
INDF
FSR,F
FSR,4
NEXT
;initialize pointer
;to RAM
;clear INDF Register
;inc pointer
;all done?
;NO, clear next
CONTINUE
:
;YES, continue
The FSR is either a 5-bit (PIC16F54), 7-bit (PIC16F57)
or 8-bit (PIC16F59) wide register. It is used in conjunction with the INDF register to indirectly address the data
memory area.
The FSR<4:0> bits are used to select data memory
addresses 00h to 1Fh.
PIC16F54: This does not use banking. FSR<7:5> bits
are unimplemented and read as ‘1’s.
PIC16F57: FSR<7> bit is unimplemented and read as
‘1’. FSR<6:5> are the bank select bits and are used to
select the bank to be addressed (00 = Bank 0,
01 = Bank 1, 10 = Bank 2, 11 = Bank 3).
PIC16F59: FSR<7:5> are the bank select bits and are
used to select the bank to be addressed
(000 = Bank 0, 001 = Bank 1, 010 = Bank 2,
011 = Bank 3, 100 = Bank 4, 101 = Bank 5,
110 = Bank 6, 111 = Bank 7).
Note:
DS41213D-page 20
A CLRF FSR instruction may not result in
an FSR value of 00h if there are
unimplemented bits present in the FSR.
© 2007 Microchip Technology Inc.
PIC16F5X
4.0
OSCILLATOR
CONFIGURATIONS
4.1
Oscillator Types
TABLE 4-1:
Osc
Type
The PIC16F5X devices can be operated in four different oscillator modes. The user can program two Configuration bits (FOSC1:FOSC0) to select one of these
four modes:
•
•
•
•
LP:
XT:
HS:
RC:
Low-power Crystal
Crystal/Resonator
High-speed Crystal/Resonator
Resistor/Capacitor
4.2
Crystal Oscillator/Ceramic
Resonators
In XT, LP or HS modes, a crystal or ceramic resonator
is connected to the OSC1/CLKIN and OSC2/CLKOUT
pins to establish oscillation (Figure 4-1). The
PIC16F5X oscillator design requires the use of a
parallel cut crystal. Use of a series cut crystal may give
a frequency outside of the crystal manufacturers
specifications. When in XT, LP or HS modes, the
device can have an external clock source drive the
OSC1/CLKIN pin (Figure 4-2).
FIGURE 4-1:
CRYSTAL/CERAMIC
RESONATOR OPERATION
(HS, XT OR LP OSC
CONFIGURATION)
C1(1)
OSC1
PIC16F5X
Sleep
XTAL
RF(3)
OSC2
To internal
logic
RS(2)
CAPACITOR SELECTION FOR
CERAMIC RESONATORS
Resonator
Freq.
Cap. Range
C1
Cap. Range
C2
XT
455 kHz
68-100 pF
68-100 pF
2.0 MHz
15-33 pF
15-33 pF
4.0 MHz
10-22 pF
10-22 pF
HS
8.0 MHz
10-22 pF
10-22 pF
16.0 MHz
10 pF
10 pF
These values are for design guidance only. Since
each resonator has its own characteristics, the user
should consult the resonator manufacturer for
appropriate values of external components.
TABLE 4-2:
Osc
Type
CAPACITOR SELECTION FOR
CRYSTAL OSCILLATOR
Crystal
Freq.
Cap.Range
C1
Cap. Range
C2
LP
32 kHz(1)
15 pF
15 pF
XT
100 kHz
200 kHz
455 kHz
1 MHz
2 MHz
4 MHz
15-30 pF
15-30 pF
15-30 pF
15-30 pF
15 pF
15 pF
200-300 pF
100-200 pF
15-100 pF
15-30 pF
15 pF
15 pF
HS
4 MHz
8 MHz
20 MHz
15 pF
15 pF
15 pF
15 pF
15 pF
15 pF
For VDD > 4.5V, C1 = C2 ≈ 30 pF is
recommended.
These values are for design guidance only. Rs may
be required in HS mode, as well as XT mode, to
avoid overdriving crystals with low drive level specifications. Since each crystal has its own characteristics, the user should consult the crystal manufacturer
for appropriate values of external components.
Note 1:
C2(1)
Note 1:
2:
3:
See Capacitor Selection tables for
recommended values of C1 and C2.
A series resistor (RS) may be required.
RF varies with the Oscillator mode chosen
(approx. value = 10 MΩ).
FIGURE 4-2:
EXTERNAL CLOCK INPUT
OPERATION (HS, XT OR LP
OSC CONFIGURATION)
Clock from
ext. system
OSC1
Open
OSC2
PIC16F5X
© 2007 Microchip Technology Inc.
Note 1: This device has been designed to perform
to the parameters of its data sheet. It has
been tested to an electrical specification
designed to determine its conformance
with these parameters. Due to process
differences in the manufacture of this
device, this device may have different
performance characteristics than its
earlier version. These differences may
cause this device to perform differently in
your application than the earlier version of
this device.
2: The user should verify that the device
oscillator starts and performs as
expected. Adjusting the loading capacitor
values and/or the Oscillator mode may be
required.
DS41213D-page 21
PIC16F5X
4.3
External Crystal Oscillator Circuit
FIGURE 4-4:
Either a pre-packaged oscillator or a simple oscillator
circuit with TTL gates can be used as an external
crystal oscillator circuit. Pre-packaged oscillators
provide a wide operating range and better stability. A
well designed crystal oscillator will provide good performance with TTL gates. Two types of crystal oscillator
circuits can be used: one with parallel resonance or one
with series resonance.
Figure 4-3 shows an implementation example of a
parallel resonant oscillator circuit. The circuit is
designed to use the fundamental frequency of the
crystal. The 74AS04 inverter performs the 180° phase
shift that a parallel oscillator requires. The 4.7 kΩ
resistor provides the negative feedback for stability.
The 10 kΩ potentiometers bias the 74AS04 in the
linear region. This circuit could be used for external
oscillator designs.
FIGURE 4-3:
EXTERNAL PARALLEL
RESONANT CRYSTAL
OSCILLATOR CIRCUIT
(USING XT, HS OR LP
OSCILLATOR MODE)
+5V
To Other
Devices
10k
74AS04
4.7k
PIC16F5X
CLKIN
74AS04
Open
OSC2
10k
XTAL
To Other
Devices
330 K
330 K
74AS04
74AS04
74AS04
PIC16F5X
CLKIN
0.1 μF
Open
XTAL
4.4
OSC2
RC Oscillator
For applications where precise timing is not a requirement, the RC oscillator option is available. The
operation and functionality of the RC oscillator is
dependent upon a number of variables. The RC
oscillator frequency is a function of:
• Supply voltage
• Resistor (REXT) and capacitor (CEXT) values
• Operating temperature.
The oscillator frequency will vary from unit to unit due
to normal process parameter variation. The difference
in lead frame capacitance between package types will
also affect the oscillation frequency, especially for low
CEXT values. The user also needs to account for the
tolerance of the external R and C components.
Figure 4-5 shows how the R/C combination is
connected.
The oscillator frequency, divided by 4, is available on
the OSC2/CLKOUT pin and can be used for test
purposes or to synchronize other logic.
10k
20 pF
EXTERNAL SERIES
RESONANT CRYSTAL
OSCILLATOR CIRCUIT
(USING XT, HS OR LP
OSCILLATOR MODE)
20 pF
FIGURE 4-5:
RC OSCILLATOR MODE
VDD
Figure 4-4 shows a series resonant oscillator circuit.
This circuit is also designed to use the fundamental
frequency of the crystal. The inverters perform a 360°
phase shift in a series resonant oscillator circuit. The
330 kΩ resistors provide the negative feedback to bias
the inverters in their linear region.
REXT
OSC1
N
CEXT
Internal
clock
PIC16F5X
VSS
OSC2/CLKOUT
FOSC/4
DS41213D-page 22
© 2007 Microchip Technology Inc.
PIC16F5X
5.0
RESET
The TO and PD bits (STATUS <4:3>) are set or cleared
depending on the different Reset conditions (Table 5-1).
These bits may be used to determine the nature of the
Reset.
The PIC16F5X devices may be reset in one of the
following ways:
•
•
•
•
•
Power-on Reset (POR)
MCLR Reset (normal operation)
MCLR Wake-up Reset (from Sleep)
WDT Reset (normal operation)
WDT Wake-up Reset (from Sleep)
Table 5-3 lists a full description of Reset states of all
registers. Figure 5-1 shows a simplified block diagram
of the on-chip Reset circuit.
Table 5-1 shows these Reset conditions for the PCL
and STATUS registers.
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 (POR), MCLR or WDT
Reset. A MCLR or WDT wake-up from Sleep also
results in a device Reset and not a continuation of
operation before Sleep.
TABLE 5-1:
STATUS BITS AND THEIR SIGNIFICANCE
Condition
TO
PD
Power-on Reset
1
1
MCLR Reset (normal operation)
u
u
MCLR Wake-up (from Sleep)
1
0
WDT Reset (normal operation)
0
1
WDT Wake-up (from Sleep)
0
0
Legend: u = unchanged, x = unknown, — = unimplemented read as ‘0’.
TABLE 5-2:
Address
03h
SUMMARY OF REGISTERS ASSOCIATED WITH RESET
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
STATUS
PA2
PA1
PA0
TO
PD
Z
DC
C
Value on
POR
Value on
MCLR and
WDT Reset
0001 1xxx 000q quuu
Legend: u = unchanged, x = unknown, q = see Table 5-1 for possible values.
© 2007 Microchip Technology Inc.
DS41213D-page 23
PIC16F5X
TABLE 5-3:
RESET CONDITIONS FOR ALL REGISTERS
Register
Address
Power-on Reset
MCLR or WDT Reset
W
N/A
xxxx xxxx
uuuu uuuu
TRIS
N/A
1111 1111
1111 1111
OPTION
N/A
--11 1111
--11 1111
INDF
00h
xxxx xxxx
uuuu uuuu
TMR0
01h
xxxx xxxx
uuuu uuuu
PCL
02h
1111 1111
1111 1111
STATUS
03h
0001 1xxx
000q quuu
(1)
FSR
04h
111x xxxx
111u uuuu
FSR(2)
04h
1xxx xxxx
1uuu uuuu
FSR(3)
04h
xxxx xxxx
uuuu uuuu
PORTA
05h
---- xxxx
---- uuuu
PORTB
06h
xxxx xxxx
uuuu uuuu
PORTC(4)
07h
xxxx xxxx
uuuu uuuu
PORTD(5)
08h
xxxx xxxx
uuuu uuuu
PORTE(5)
09h
xxxx ----
uuuu ----
Legend: u = unchanged, x = unknown, – = unimplemented, read as ‘0’, q = see tables in Table 5-1 for possible
values.
Note 1: PIC16F54 only.
2: PIC16F57 only.
3: PIC16F59 only.
4: General purpose register file on PIC16F54.
5: General purpose register file on PIC16F54 and PIC16F57.
FIGURE 5-1:
SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
VDD
POR
MCLR/VPP
MCLR
Filter
S
R
WDT
Module
Q
Chip Reset
DRT
Reset
DS41213D-page 24
© 2007 Microchip Technology Inc.
PIC16F5X
5.1
Power-on Reset (POR)
The PIC16F5X family of devices incorporate on-chip
Power-on Reset (POR) circuitry which provides an
internal chip Reset for most power-up situations. To
use this feature, the user merely ties the MCLR/VPP pin
to VDD. A simplified block diagram of the on-chip
Power-on Reset circuit is shown in Figure 5-1.
The Power-on Reset circuit and the Device Reset
Timer (Section 5.2) circuit are closely related. On
power-up, the Reset latch is set and the DRT is reset.
The DRT timer begins counting once it detects MCLR
to be high. After the time-out period, which is typically
18 ms, it will reset the Reset latch and thus end the onchip Reset signal.
A power-up example where MCLR is not tied to VDD is
shown in Figure 5-3. VDD is allowed to rise and stabilize
before bringing MCLR high. The chip will actually come
out of Reset TDRT msec after MCLR goes high.
In Figure 5-4, the on-chip Power-on Reset feature is
being used (MCLR and VDD are tied together). The VDD
is stable before the start-up timer times out and there is
no problem in getting a proper Reset. However,
Figure 5-5 depicts a problem situation where VDD rises
too slowly. The time between when the DRT senses a
high on the MCLR/VPP pin and the MCLR/VPP pin (and
VDD) actually reach their full value is too long. In this situation, when the start-up timer times out, VDD has not
reached the VDD (min) value and the chip is, therefore,
not ensured to function correctly. For such situations,
we recommend that external RC circuits be used to
achieve longer POR delay times (Figure 5-2).
FIGURE 5-2:
VDD
EXTERNAL POWER-ON
RESET CIRCUIT (FOR
SLOW VDD POWER-UP)
VDD
D
R
R1
MCLR
C
PIC16F5X
• External Power-on Reset circuit is required
only if VDD power-up is too slow. The diode D
helps discharge the capacitor quickly when
VDD powers down.
• R < 40 kΩ is recommended to make sure that
voltage drop across R does not violate the
device electrical specification.
• R1 = 100Ω to 1 kΩ will limit any current
flowing into MCLR from external capacitor C
in the event of MCLR pin breakdown due to
Electrostatic Discharge (ESD) or Electrical
Overstress (EOS).
Note 1: When the device starts normal operation
(exits the Reset condition), device
operating parameters (voltage, frequency, temperature, etc.) must be met to
ensure operation. If these conditions are
not met, the device must be held in Reset
until the operating conditions are met.
2: The POR is disabled when the device is
in Sleep.
For more information on the PIC16F5X POR, see
Application Note AN522, “Power-Up Considerations”
at www.microchip.com.
© 2007 Microchip Technology Inc.
DS41213D-page 25
PIC16F5X
FIGURE 5-3:
TIME-OUT SEQUENCE ON POWER-UP (MCLR NOT TIED TO VDD)
VDD
MCLR
Internal POR
TDRT
DRT Time-out
Internal Reset
TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD): FAST VDD RISE TIME
FIGURE 5-4:
VDD
MCLR
Internal POR
TDRT
DRT Time-out
Internal Reset
TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD): SLOW VDD RISE TIME
FIGURE 5-5:
V1
VDD
MCLR
Internal POR
TDRT
DRT Time-out
Internal Reset
Note :
When VDD rises slowly, the TDRT time-out expires long before VDD has reached its final value. In this example, the
chip will reset properly if, and only if, V1 ≥ VDD min.
DS41213D-page 26
© 2007 Microchip Technology Inc.
PIC16F5X
5.2
Device Reset Timer (DRT)
FIGURE 5-7:
The Device Reset Timer (DRT) provides an 18 ms
nominal time-out on Reset regardless of the oscillator
mode used. The DRT operates on an internal RC
oscillator. The processor is kept in Reset as long as the
DRT is active. The DRT delay allows VDD to rise above
VDD min. and for the chosen oscillator to stabilize.
Oscillator circuits, based on crystals or ceramic resonators, require a certain time after power-up to establish
a stable oscillation. The on-chip DRT keeps the device
in a Reset condition for approximately 18 ms after the
voltage on the MCLR/VPP pin has reached a logic high
(VIH) level. Thus, external RC networks connected to
the MCLR input are not required in most cases,
allowing for savings in cost-sensitive and/or space
restricted applications.
The device Reset time delay will vary from chip-to-chip
due to VDD, temperature and process variation. See
AC parameters for details.
The DRT will also be triggered upon a Watchdog Timer
time-out. This is particularly important for applications
using the WDT to wake the PIC16F5X from Sleep
mode automatically.
5.3
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 2
VDD
VDD
R1
Q1
MCLR
R2
40k
This brown-out circuit is less expensive, although
less accurate. Transistor Q1 turns off when VDD is
below a certain level such that:
VDD •
FIGURE 5-8:
Reset on Brown-Out
A Brown-out is a condition where device power (VDD)
dips below its minimum value, but not to zero, and then
recovers. The device should be reset in the event of a
Brown-out.
To reset PIC16F5X devices when a Brown-out occurs,
external Brown-out protection circuits may be built, as
shown in Figure 5-6, Figure 5-7 and Figure 5-8.
PIC16F5X
R1
R1 + R2
= 0.7V
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 3
VDD
VDD
Bypass
Capacitor
VDD
MCP809
VSS
RST
MCLR
PIC16F5X
FIGURE 5-6:
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 1
VDD
VDD
33k
10k
Q1
40k
This brown-out protection circuit employs
Microchip Technology’s MCP809 microcontroller
supervisor. The MCP8XX and MCP1XX families
of supervisors provide push-pull and open collector outputs with both “active-high and active-low”
Reset pins. There are 7 different trip point
selections to accommodate 5V and 3V systems.
MCLR
PIC16F5X
This circuit will activate Reset when VDD goes below
Vz + 0.7V (where Vz = Zener voltage).
© 2007 Microchip Technology Inc.
DS41213D-page 27
PIC16F5X
NOTES:
DS41213D-page 28
© 2007 Microchip Technology Inc.
PIC16F5X
6.0
I/O PORTS
As with any other register, the I/O registers can be written and read under program control. However, read
instructions (e.g., MOVF PORTB, W) always read the I/O
pins independent of the pin’s Input/Output modes. On
Reset, all I/O ports are defined as input (inputs are at
high-impedance), since the I/O control registers
(TRISA, TRISB, TRISC, TRISD and TRISE) are all set.
6.1
6.6
The output driver control registers are loaded with the
contents of the W register by executing the TRIS f
instruction. A ‘1’ from a TRIS register bit puts the corresponding output driver in a High-Impedance (Input)
mode. A ‘0’ puts the contents of the output data latch
on the selected pins, enabling the output buffer.
Note:
PORTA
PORTA is a 4-bit I/O register. Only the low order 4 bits
are used (PORTA<3:0>). The high order 4 bits
(PORTA<7:4>) are unimplemented and read as ‘0’s.
6.2
PORTB
TRIS Registers
A read of the ports reads the pins, not the
output data latches. That is, if an output
driver on a pin is enabled and driven high,
but the external system is holding it low, a
read of the port will indicate that the pin is
low.
The TRIS registers are “write-only” and are set (output
drivers disabled) upon Reset.
PORTB is an 8-bit I/O register (PORTB<7:0>).
6.7
6.3
The equivalent circuit for an I/O port pin is shown in
Figure 6-1. All ports may be used for both input and
output operation. For input operations, these ports are
non-latching. Any input must be present until read by
an input instruction (e.g., MOVF PORTB, W). The outputs are latched and remain unchanged until the output
latch is rewritten. To use a port pin as output, the
corresponding direction control bit (in TRISA, TRISB,
TRISC, TRISD and TRISE) must be cleared (= 0). For
use as an input, the corresponding TRIS bit must be
set. Any I/O pin can be programmed individually as
input or output.
PORTC
PORTC is an 8-bit I/O register (PORTC<7:0>) for the
PIC16F57 and PIC16F59.
PORTC is a General Purpose Register for the
PIC16F54.
6.4
PORTD
PORTD is an 8-bit I/O register (PORTD<7:0>) for the
PIC16F59.
PORTD is a General Purpose Register for the
PIC16F54 and PIC16F57.
6.5
I/O Interfacing
FIGURE 6-1:
EQUIVALENT CIRCUIT
FOR A SINGLE I/O PIN
PORTE
PORTE is an 4-bit I/O register for the PIC16F59. Only
the high order 4 bits are used (PORTE<7:4>). The low
order 4 bits (PORTE<3:0>) are unimplemented and
read as ‘0’s.
Data
Bus
D
WR
Port
Q
Data
Latch
CK
VDD
Q
P
PORTE is a General Purpose Register for the
PIC16F54 and PIC16F57.
W
Reg
I/O
pin
N
D
Q
TRIS
Latch
TRIS ‘f’
VDD
CK
VSS
VSS
Q
Reset
Q
D
E
RD Port
© 2007 Microchip Technology Inc.
DS41213D-page 29
PIC16F5X
TABLE 6-1:
Address
SUMMARY OF PORT REGISTERS
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
Power-on
Reset
Value on
MCLR and
WDT Reset
N/A
TRIS
05h
PORTA
I/O Control Registers (TRISA, TRISB, TRISC, TRISD and TRISE) 1111 1111 1111 1111
06h
PORTB
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0
xxxx xxxx uuuu uuuu
07h
PORTC(1)
RC7
RC6
RC5
RC4
RC3
RC2
RC1
RC0
xxxx xxxx uuuu uuuu
08h
PORTD(2)
RD7
RD6
RD5
RD4
RD3
RD2
RD1
RD0
xxxx xxxx uuuu uuuu
09h
PORTE(2)
RE7
RE6
RE5
RE4
—
—
—
—
xxxx ---- uuuu ----
—
—
—
—
RA3
RA2
RA1
RA0
---- xxxx ---- uuuu
Legend: Shaded cells = unimplemented, read as ‘0’, – = unimplemented, read as ‘0’, x = unknown,
u = unchanged
Note 1: File address 07h is a General Purpose Register on the PIC16F54.
2: File address 08h and 09h are General Purpose Registers on the PIC16F54 and PIC16F57.
DS41213D-page 30
© 2007 Microchip Technology Inc.
PIC16F5X
6.8
6.8.1
EXAMPLE 6-1:
I/O Programming Considerations
BIDIRECTIONAL I/O PORTS
Some instructions operate internally as read followed
by write operations. The BCF and BSF instructions, for
example, read the entire port into the CPU, execute the
bit operation and re-write the result. Caution must be
used when these instructions are applied to a port
where one or more pins are used as input/outputs. For
example, a BSF operation on bit 5 of PORTB will cause
all eight bits of PORTB to be read into the CPU, bit 5 to
be set and the PORTB value to be written to the output
latches. If another bit of PORTB is used as a
bidirectional I/O pin (say bit ‘0’), and it is defined as an
input at this time, the input signal present on the pin
itself would be read into the CPU and rewritten to the
data latch of this particular pin, overwriting the previous
content. As long as the pin stays in the Input mode, no
problem occurs. However, if bit ‘0’ is switched into
Output mode later on, the content of the data latch may
now be unknown.
;Initial PORT Settings
;PORTB<7:4> Inputs
;PORTB<3:0> Outputs
;PORTB<7:6> have external pull-ups and are
;not connected to other circuitry
;
;
PORT latch PORT pins
;
--------------------BCF
PORTB, 7 ;01pp pppp
11pp pppp
BCF
PORTB, 6 ;10pp pppp
11pp pppp
MOVLW H'3F'
;
TRIS PORTB
;10pp pppp
10pp pppp
;
;Note that the user may have expected the
pin
;values to be 00pp pppp. The 2nd BCF caused
;RB7 to be latched as the pin value (High).
6.8.2
Example 6-1 shows the effect of two sequential readmodify-write instructions (e.g., BCF, BSF, etc.) on an
I/O port.
SUCCESSIVE OPERATIONS ON I/O
PORTS
The actual write to an I/O port happens at the end of an
instruction cycle, whereas for reading, the data must be
valid at the beginning of the instruction cycle (see
Figure 6-2). Therefore, care must be exercised if a write
followed by a read operation is carried out on the same
I/O port. The sequence of instructions should allow the pin
voltage to stabilize (load dependent) before the next
instruction, which causes that file to be read into the CPU,
is executed. Otherwise, the previous state of that pin may
be read into the CPU rather than the new state. When in
doubt, it is better to separate these instructions with a NOP
or another instruction not accessing this I/O port.
A pin actively outputting a high or a low should not be
driven from external devices at the same time in order
to change the level on this pin (“wired-or”, “wired-and”).
The resulting high output currents may damage the
chip.
FIGURE 6-2:
READ-MODIFY-WRITE
INSTRUCTIONS ON AN I/O
PORT
SUCCESSIVE I/O OPERATION
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
PC
Instruction
fetched
MOVWF PORTB
PC + 1
MOVF PORTB,W
PC + 2
PC + 3
NOP
NOP
This example shows a write
to PORTB followed by a read
from PORTB.
RB<7:0>
Instruction
executed
Port pin
written here
Port pin
sampled here
MOVWF PORTB
(Write to
PORTB)
MOVF PORTB,W
(Read
PORTB)
Fetch INST (PC)
Execute INST (PC - 1) Fetch INST (PC + 1)
Execute INST (PC)
© 2007 Microchip Technology Inc.
NOP
Fetch INST (PC + 2)
Execute INST (PC + 1) Fetch INST (PC + 3)
Execute INST (PC + 2)
DS41213D-page 31
PIC16F5X
NOTES:
DS41213D-page 32
© 2007 Microchip Technology Inc.
PIC16F5X
7.0
TIMER0 MODULE AND TMR0
REGISTER
Counter mode is selected by setting the T0CS bit
(OPTION<5>). In this mode, Timer0 will increment
either on every rising or falling edge of pin T0CKI. The
incrementing edge is determined by the source edge
select bit T0SE (OPTION<4>). Clearing the T0SE bit
selects the rising edge. Restrictions on the external
clock input are discussed in detail in Section 7.1
“Using Timer0 with an External Clock”.
The Timer0 module has the following features:
• 8-bit Timer/Counter register, TMR0
- Readable and writable
• 8-bit software programmable prescaler
• Internal or external clock select
- Edge select for external clock
Note:
Figure 7-1 is a simplified block diagram of the Timer0
module.
The prescaler assignment is controlled in software by
the control bit PSA (OPTION<3>). Clearing the PSA bit
will assign the prescaler to Timer0. The prescaler is not
readable or writable. When the prescaler is assigned to
the Timer0 module, prescale values of 1:2, 1:4,...,
1:256 are selectable. Section 7.2 “Prescaler” details
the operation of the prescaler.
Timer mode is selected by clearing the T0CS bit
(OPTION<5>). In Timer mode, the Timer0 module will
increment every instruction cycle (without prescaler). If
TMR0 register is written, the increment is inhibited for
the following two cycles (Figure 7-2 and Figure 7-3).
The user can work around this by writing an adjusted
value to the TMR0 register.
FIGURE 7-1:
The prescaler may be used by either the
Timer0 module or the Watchdog Timer, but
not both.
A summary of registers associated with the Timer0
module is found in Table 7-1.
TIMER0 BLOCK DIAGRAM
Data Bus
FOSC/4
0
PSout
8
1
1
T0CKI
pin
Programmable
Prescaler(2)
0
T0SE(1)
Sync with
Internal
Clocks
TMR0 Reg
PSout
(2 cycle delay) Sync
3
PS2, PS1, PS0(1)
PSA(1)
T0CS(1)
Note 1:
2:
Bits T0CS, T0SE, PSA, PS2, PS1 and PS0 are located in Section 3.4 “Option Register”.
The prescaler is shared with the Watchdog Timer (Figure 7-5).
FIGURE 7-2:
TIMER0 TIMING: INTERNAL CLOCK/NO PRESCALER
PC
(Program
Counter)
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 Q1 Q2 Q3 Q4
Instruction
Fetch
MOVWF TMR0 MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W
Timer0
PC - 1
T0
PC
T0 + 1
Instruction
Executed
© 2007 Microchip Technology Inc.
PC + 1
PC + 2
PC + 3
T0 + 2
NT0
NT0
Write TMR0
executed
Read TMR0
reads NT0
Read TMR0
reads NT0
PC + 4
NT0
Read TMR0
reads NT0
PC + 5
NT0 + 1
PC + 6
NT0 + 2
Read TMR0
Read TMR0
reads NT0 + 1 reads NT0 + 2
DS41213D-page 33
PIC16F5X
FIGURE 7-3:
TIMER0 TIMING: INTERNAL CLOCK/PRESCALER 1:2
PC
(Program
Counter)
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 Q1 Q2 Q3 Q4
Instruction
Fetch
MOVWF TMR0 MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W
Timer0
PC - 1
PC
T0
PC + 1
PC + 3
T0 + 1
Write TMR0
executed
TABLE 7-1:
PC + 4
PC + 5
Read TMR0
reads NT0
Read TMR0
reads NT0
PC + 6
NT0 + 1
NT0
Instruction
Execute
Address
PC + 2
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
reads NT0 + 1
REGISTERS ASSOCIATED WITH TIMER0
Name
01h
TMR0
N/A
OPTION
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PS2
PS1
PS0
Timer0 - 8-bit real-time clock/counter
—
—
T0CS
T0SE
PSA
Value on
Power-on
Reset
Value on
MCLR and
WDT Reset
xxxx xxxx uuuu uuuu
--11 1111 --11 1111
Legend: Shaded cells not used by Timer0, - = unimplemented, x = unknown, u = unchanged.
DS41213D-page 34
© 2007 Microchip Technology Inc.
PIC16F5X
7.1
Using Timer0 with an External
Clock
When a prescaler is used, the external clock input is
divided by the asynchronous ripple counter-type
prescaler so that the prescaler output is symmetrical.
For the external clock to meet the sampling requirement, the ripple counter must be taken into account.
Therefore, it is necessary for T0CKI to have a period of
at least 4TOSC (and a small RC delay of 40 ns) divided
by the prescaler value. The only requirement on T0CKI
high and low time is that they do not violate the
minimum pulse width requirement of 10 ns. Refer to
parameters 40, 41 and 42 in the electrical specification
of the desired device.
When an external clock input is used for Timer0, it must
meet certain requirements. The external clock
requirement is due to internal phase clock (TOSC)
synchronization. Also, there is a delay in the actual
incrementing of Timer0 after synchronization.
7.1.1
EXTERNAL CLOCK
SYNCHRONIZATION
When no prescaler is used, the external clock is the
Timer0 input. The synchronization of T0CKI with the
internal phase clocks is accomplished by sampling the
prescaler output on the Q2 and Q4 cycles of the internal phase clocks (Figure 7-4). Therefore, it is necessary for T0CKI to be high for at least 2TOSC (and a small
RC delay of 20 ns) and low for at least 2TOSC (and a
small RC delay of 20 ns). Refer to the electrical
specification of the desired device.
FIGURE 7-4:
7.1.2
TIMER0 INCREMENT DELAY
Since the prescaler output is synchronized with the
internal clocks, there is a small delay from the time the
external clock edge occurs to the time the Timer0
module is actually incremented. Figure 7-4 shows the
delay from the external clock edge to the timer
incrementing.
TIMER0 TIMING WITH EXTERNAL CLOCK
Q1 Q2 Q3 Q4
Q1 Q2 Q3 Q4
Q1 Q2 Q3 Q4
External Clock Input or
Prescaler Output(1)
Q1 Q2 Q3 Q4
Small pulse
misses sampling
(3)
External Clock/Prescaler
Output After Sampling
(2)
Increment Timer0 (Q4)
Timer0
Note 1:
2:
3:
7.2
T0
T0 + 1
T0 + 2
External clock if no prescaler selected; prescaler output otherwise.
The arrows indicate the points in time where sampling occurs.
Delay from clock input change to Timer0 increment is 3TOSC to 7TOSC (duration of Q = TOSC). Therefore, the error
in measuring the interval between two edges on Timer0 input = ± 4TOSC max.
Prescaler
An 8-bit counter is available as a prescaler for the
Timer0 module, or as a postscaler for the Watchdog
Timer (WDT), respectively (Section 8.2.1 “WDT
Period”). For simplicity, this counter is being referred
to as “prescaler” throughout this data sheet. Note that
the prescaler may be used by either the Timer0 module
or the WDT, but not both. Thus, a prescaler assignment
for the Timer0 module means that there is no prescaler
for the WDT, and vice-versa.
© 2007 Microchip Technology Inc.
The PSA and PS<2:0> bits (OPTION<3:0>) determine
prescaler assignment and prescale ratio.
When assigned to the Timer0 module, all instructions
writing to the TMR0 register (e.g., CLRF 1, MOVWF 1,
BSF 1, x, etc.) will clear the prescaler. When assigned
to WDT, a CLRWDT instruction will clear the prescaler
along with the WDT. The prescaler is neither readable
nor writable. On a Reset, the prescaler contains all ‘0’s.
DS41213D-page 35
PIC16F5X
7.2.1
SWITCHING PRESCALER
ASSIGNMENT
To change prescaler from the WDT to the Timer0
module, use the sequence shown in Example 7-2. This
sequence must be used even if the WDT is disabled. A
CLRWDT instruction should be executed before
switching the prescaler.
The prescaler assignment is fully under software control
(i.e., it can be changed “on-the-fly” during program
execution). To avoid an unintended device Reset, the
following instruction sequence (Example 7-1) must be
executed when changing the prescaler assignment
from Timer0 to the WDT.
EXAMPLE 7-2:
CLRWDT
EXAMPLE 7-1:
CLRWDT
CLRF
MOVLW
OPTION
CLRWDT
MOVLW
OPTION
CHANGING PRESCALER
(TIMER0→WDT)
MOVLW
;Clear WDT
TMR0
;Clear TMR0 & ;Prescaler
B'00xx1111’ ;Last 3 instructions
;in this example
;are required only if
;desired
;PS<2:0> are 000 or 001
B'00xx1xxx’ ;Set Prescaler to
;desired WDT rate
FIGURE 7-5:
CHANGING PRESCALER
(WDT→TIMER0)
;Clear WDT and
;prescaler
B'xxxx0xxx' ;Select TMR0, new
;prescale value and
;clock source
OPTION
BLOCK DIAGRAM OF THE TIMER0/WDT PRESCALER
TCY ( = FOSC/4)
Data Bus
0
T0CKI
pin
1
8
M
U
X
1
M
U
X
0
T0SE(1)
T0CS(1)
0
Watchdog
Timer
1
M
U
X
Sync
2
Cycles
TMR0 reg
PSA(1)
8-bit Prescaler
8
PS<2:0>(1)
8-to-1 MUX
PSA(1)
1
0
WDT Enable bit
MUX
PSA(1)
WDT
Time-Out
Note 1:
DS41213D-page 36
T0CS, T0SE, PSA PS<2:0> are bits in the Option register.
© 2007 Microchip Technology Inc.
PIC16F5X
8.0
SPECIAL FEATURES OF THE
CPU
What sets a microcontroller apart from other processors are special circuits that deal with the needs of realtime applications. The PIC16F5X family of microcontrollers have a host of such features intended to
maximize system reliability, minimize cost through
elimination of external components, provide powersaving operating modes and offer code protection.
These features are:
•
•
•
•
•
•
•
•
•
Oscillator Selection
Reset
Power-on Reset
Device Reset Timer
Watchdog Timer (WDT)
Sleep
Code protection
User ID locations
In-Circuit Serial Programming™ (ICSP™)
The Sleep mode is designed to offer a very low-current
Power-down mode. The user can wake-up from Sleep
through external Reset or through a Watchdog Timer
time-out. Several oscillator options are also made
available to allow the part to fit the application. The RC
oscillator option saves system cost, while the LP crystal
option saves power. A set of Configuration bits are
used to select various options.
8.1
Configuration Bits
Configuration bits can be programmed to select various
device configurations. Two bits are for the selection of
the oscillator type; one bit is the Watchdog Timer
enable bit; one bit is for code protection for the
PIC16F5X devices (Register 8-1).
The PIC16F5X family has a Watchdog Timer which can
be shut off only through Configuration bit WDTE. It runs
off of its own RC oscillator for added reliability. There is
an 18 ms delay provided by the Device Reset Timer
(DRT), intended to keep the chip in Reset until the
crystal oscillator is stable. With this timer on-chip, most
applications need no external Reset circuitry.
REGISTER 8-1:
—
—
CONFIGURATION WORD FOR PIC16F5X
—
—
—
—
—
—
CP
WDTE
FOSC1
FOSC0
bit 11
bit 0
bit 11-4: Unimplemented: Read as ‘1’
bit 3:
CP: Code Protection bit.
1 = Code protection off
0 = Code protection on
bit 2:
WDTE: Watchdog Timer Enable bit
1 = WDT enabled
0 = WDT disabled
bit 1-0:
FOSC1:FOSC0: Oscillator Selection bits
00 = LP oscillator
01 = XT oscillator
10 = HS oscillator
11 = RC oscillator
Note 1: Refer to the PIC16F54, PIC16F57 and PIC16F59 Programming Specifications to determine how
to access the Configuration Word. These documents can be found on the Microchip web site at
www.microchip.com.
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
© 2007 Microchip Technology Inc.
x = bit is unknown
DS41213D-page 37
PIC16F5X
8.2
8.2.2
Watchdog Timer (WDT)
The Watchdog Timer (WDT) is a free running on-chip
RC oscillator which does not require any external
components. This RC oscillator is separate from the
RC oscillator of the OSC1/CLKIN pin. That means that
the WDT will run even if the clock on the OSC1/CLKIN
and OSC2/CLKOUT pins have been stopped, for
example, by execution of a SLEEP instruction. During
normal operation or Sleep, a WDT Reset or Wake-up
Reset generates a device Reset.
The CLRWDT instruction clears the WDT and the
prescaler, if assigned to the WDT, and prevents it from
timing out and generating a device Reset.
The SLEEP instruction resets the WDT and the
prescaler, if assigned to the WDT. This gives the
maximum Sleep time before a WDT Wake-up Reset.
FIGURE 8-1:
The TO bit (STATUS<4>) will be cleared upon a
Watchdog Timer Reset (Section 3.3 “STATUS
Register”).
WATCHDOG TIMER
BLOCK DIAGRAM
From TMR0 Clock Source
The WDT can be permanently disabled by programming the Configuration bit WDTE as a ‘0’ (Section 8.1
“Configuration Bits”). Refer to the PIC16F54 and
PIC16F57 Programming Specifications to determine
how to access the Configuration Word. These
documents can be found on the Microchip web site at
www.microchip.com.
8.2.1
WDT PROGRAMMING
CONSIDERATIONS
Watchdog
Timer
0
M
1
U
PSA(1)
8-to-1
MUX
WDTE
PS<2:0>(1)
To TMR0
WDT PERIOD
An 8-bit counter is available as a prescaler for the
Timer0 module (Section 7.2 “Prescaler”), or as a
postscaler for the Watchdog Timer (WDT), respectively. For simplicity, this counter is being referred to as
“prescaler” throughout this data sheet.
Note:
Prescaler
X
0
1
PSA(1)
MUX
WDT Time-out
The prescaler may be used by either the
Timer0 module or the WDT, but not both.
Thus, a prescaler assignment for the
Timer0 module means that there is no
prescaler for the WDT, and vice-versa.
Note 1:
T0CS, T0SE, PSA, PS<2:0> are bits in the
Option register.
The PSA and PS<2:0> bits (OPTION<3:0>) determine
prescaler assignment and prescale ratio (Section 3.4
“Option Register”).
The WDT has a nominal time-out period of 18 ms (with
no prescaler). If a longer time-out period is 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, a period of a
nominal 2.3 seconds, can be realized. These periods
vary with temperature, VDD and part-to-part process
variations (see Device Characterization).
Under worst case conditions (VDD = Min., Temperature
= Max., WDT prescaler = 1:128), it may take several
seconds before a WDT time-out occurs.
TABLE 8-1:
Address
N/A
SUMMARY OF REGISTERS ASSOCIATED WITH THE WATCHDOG TIMER
Name
OPTION
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
—
—
T0CS
T0SE
PSA
PS2
PS1
PS0
Value on
Power-on
Reset
Value on
MCLR and
WDT Reset
--11 1111 --11 1111
Legend: Shaded cells not used by Watchdog Timer, - = unimplemented, read as ‘0’, u = unchanged
DS41213D-page 38
© 2007 Microchip Technology Inc.
PIC16F5X
8.3
Power-Down Mode (Sleep)
A device may be powered down (Sleep) and later
powered up (wake-up from Sleep).
8.3.1
SLEEP
The Power-down mode is entered by executing a
SLEEP instruction.
If enabled, the Watchdog Timer will be cleared but
keeps running, the TO bit (STATUS<4>) is set, the PD
bit (STATUS<3>) is cleared and the oscillator driver is
turned off. The I/O ports maintain the status they had
before the SLEEP instruction was executed (driving
high, driving low or high-impedance).
It should be noted that a Reset generated by a WDT
time-out does not drive the MCLR/VPP pin low.
For lowest current consumption while powered down,
the T0CKI input should be at VDD or VSS and the
MCLR/VPP pin must be at a logic high level
(MCLR = VIH).
8.3.2
WAKE-UP FROM SLEEP
The device can wake-up from Sleep through one of the
following events:
1.
2.
An external Reset input on MCLR/VPP pin.
A Watchdog Timer time-out Reset (if WDT was
enabled).
Both of these events cause a device Reset. The TO
and PD bits can be used to determine the cause of
device Reset. The TO bit is cleared if a WDT time-out
occurred (and caused wake-up). The PD bit, which is
set on power-up, is cleared when SLEEP is invoked.
The WDT is cleared when the device wakes from
Sleep, regardless of the wake-up source.
8.4
Program Verification/Code
Protection
If the code protection bit has not been programmed, the
on-chip program memory can be read out for
verification purposes.
Once code protection is enabled, all program memory
locations above 0x3F read all ‘0’s. Program memory
locations 0x00-0x3F are always unprotected. The user
ID locations and the Configuration Word read out in an
unprotected fashion. It is possible to program the user
ID locations and the Configuration Word after code
protect is enabled.
© 2007 Microchip Technology Inc.
8.5
User ID Locations
Four memory locations are designated as user 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.
Use only the lower 4 bits of the user ID locations and
always program the upper 8 bits as ‘1’s.
Note:
8.6
Microchip will assign a unique pattern
number for QTP and SQTP requests. This
pattern number will be unique and traceable to the submitted code.
In-Circuit Serial Programming™
(ICSP™)
The PIC16F5X microcontrollers can be serially
programmed while in the end application circuit. This is
simply done with two lines for clock and data, and three
other lines for power, ground and programming
voltage. This allows customers to manufacture boards
with unprogrammed devices and then program the
microcontroller just before shipping the product. Thus,
the most recent firmware or custom firmware can be
programmed.
The device is placed into a Program/Verify mode by
holding the RB6 and RB7 pins low while raising the
MCLR (VPP) pin from VIL to VIHH (see programming
specification). RB6 becomes the programming clock
and RB7 becomes the programming data. Both RB6
and RB7 are Schmitt Trigger inputs in this mode.
A 6-bit command is then supplied to the device.
Depending on the command, 14 bits of program data
are then supplied to or from the device, depending if
the command was a Load or a Read. For complete
details of serial programming, please refer to the
respective Programming Specifications: “PIC16F54
Memory Programming Specification” (DS41207),
“PIC16F57 Memory Programming Specification”
(DS41208), and “PIC16F59 Memory Programming
Specification” (DS41243).
A typical In-Circuit Serial Programming connection is
shown in Figure 8-1.
DS41213D-page 39
PIC16F5X
FIGURE 8-1:
TYPICAL IN-CIRCUIT SERIAL PROGRAMMING™ CONNECTION
External
Connector
Signals
To Normal
Connections
PIC16F5X
+5V
VDD
0V
VSS
VPP
MCLR/VPP
CLK
RB6/ICSPCLK
Data I/O
RB7/ICSPDAT
VDD
To Normal
Connections
DS41213D-page 40
© 2007 Microchip Technology Inc.
PIC16F5X
9.0
INSTRUCTION SET SUMMARY
Each PIC16F5X instruction is a 12-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 PIC16F5X instruction set
summary in Table 9-2 groups the instructions into byteoriented, bit-oriented, and literal and control operations. Table 9-1 shows the opcode field descriptions.
For byte-oriented instructions, ‘f’ represents a file
register designator and ‘d’ represents a destination
designator. The file register designator is used to
specify which one of the 32 file registers in that bank is
to be used by the instruction.
All instructions are executed within one single instruction cycle, unless a conditional test is true or the
program counter is changed as a result of an instruction. In this case, the execution takes two instruction
cycles. One instruction cycle consists of four oscillator
periods. Thus, for an oscillator frequency of 4 MHz, the
normal instruction execution time would be 1 μs. If a
conditional test is true or the program counter is
changed as a result of an instruction, the instruction
execution time would be 2 μs.
Figure 9-1 shows the three general formats that the
instructions can have. All examples in the figure use
the following format to represent a hexadecimal
number:
The destination designator specifies where the result of
the operation is to be placed. If ‘d’ is ‘0’, the result is
placed in the W register. If ‘d’ is ‘1’, the result is placed
in the file register specified in the instruction.
where ‘h’ signifies a hexadecimal digit.
For bit-oriented instructions, ‘b’ represents a bit field
designator which selects the number of the bit affected
by the operation, while ‘f’ represents the number of the
file in which the bit is located.
Byte-oriented file register operations
0xhhh
FIGURE 9-1:
11
TABLE 9-1:
OPCODE FIELD
DESCRIPTIONS
Field
f
W
b
k
x
d
label
TOS
PC
WDT
TO
Description
Register file address (0x00 to 0x1F)
Working register (accumulator)
Bit address within an 8-bit file register
Literal field, constant data or label
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.
Destination select;
d = 0 (store result in W)
d = 1 (store result in file register ‘f’)
Default is d = 1
Label name
Top-of-Stack
Program Counter
Watchdog Timer Counter
6
OPCODE
For literal and control operations, ‘k’ represents an
8- or 9-bit constant or literal value.
GENERAL FORMAT FOR
INSTRUCTIONS
5
d
4
0
f (FILE #)
d = 0 for destination W
d = 1 for destination f
f = 5-bit file register address
Bit-oriented file register operations
11
OPCODE
8 7
5 4
b (BIT #)
0
f (FILE #)
b = 3-bit bit address
f = 5-bit file register address
Literal and control operations (except GOTO)
11
8
7
OPCODE
0
k (literal)
k = 8-bit immediate value
Literal and control operations - GOTO instruction
11
9
8
OPCODE
0
k (literal)
k = 9-bit immediate value
Time-out bit
PD
dest
Power-down bit
Destination, either the W register or the
specified register file location
[ ]
Options
( )
Contents
→
Assigned to
< >
Register bit field
∈
In the set of
italics User defined term
© 2007 Microchip Technology Inc.
DS41213D-page 41
PIC16F5X
TABLE 9-2:
Mnemonic,
Operands
INSTRUCTION SET SUMMARY
12-Bit Opcode
Description
Cycles
MSb
LSb
Status
Notes
Affected
ADDWF
0001 11df ffff C,DC,Z 1, 2, 4
f, d
Add W and f
1
ANDWF
0001 01df ffff
f, d
AND W with f
1
Z
2, 4
CLRF
0000 011f ffff
f
Clear f
1
Z
4
CLRW
0000 0100 0000
—
Clear W
1
Z
COMF
0010 01df ffff
f, d
Complement f
1
Z
DECF
0000 11df ffff
f, d
Decrement f
1
Z
2, 4
DECFSZ
0010 11df ffff
f, d
Decrement f, Skip if 0
1(2)
None
2, 4
1
INCF
0010 10df ffff
f, d
Increment f
Z
2, 4
1(2)
INCFSZ
0011 11df ffff
f, d
Increment f, Skip if 0
None
2, 4
1
IORWF
0001 00df ffff
f, d
Inclusive OR W with f
Z
2, 4
1
MOVF
0010 00df ffff
f, d
Move f
Z
2, 4
1
MOVWF
0000 001f ffff
f
Move W to f
None
1, 4
1
NOP
0000 0000 0000
—
No Operation
None
1
RLF
0011 01df ffff
f, d
Rotate left f through Carry
C
2, 4
1
RRF
0011 00df ffff
f, d
Rotate right f through Carry
C
2,4
1
SUBWF
0000 10df ffff C,DC,Z 1, 2, 4
f, d
Subtract W from f
1
SWAPF
0011 10df ffff
f, d
Swap f
None
2, 4
1
XORWF
0001 10df ffff
f, d
Exclusive OR W with f
Z
2, 4
BIT-ORIENTED FILE REGISTER OPERATIONS
0100 bbbf ffff
None
2, 4
1
Bit Clear f
BCF
f, b
0101 bbbf ffff
None
2, 4
1
Bit Set f
BSF
f, b
0110 bbbf ffff
None
Bit Test f, Skip if Clear
1(2)
BTFSC
f, b
1(2)
0111 bbbf ffff
None
f, b
Bit Test f, Skip if Set
BTFSS
LITERAL AND CONTROL OPERATIONS
ANDLW
k
AND literal with W
1
1110 kkkk kkkk
Z
CALL
1
k
Subroutine Call
2
1001 kkkk kkkk
None
CLRWDT
—
Clear Watchdog Timer
1
0000 0000 0100 TO, PD
None
GOTO
k
Unconditional branch
2
101k kkkk kkkk
Z
IORLW
k
Inclusive OR Literal with W
1
1101 kkkk kkkk
None
MOVLW
k
Move Literal to W
1
1100 kkkk kkkk
None
OPTION
—
Load OPTION register
1
0000 0000 0010
None
RETLW
k
Return, place Literal in W
2
1000 kkkk kkkk
SLEEP
—
Go into Standby mode
1
0000 0000 0011 TO, PD
None
3
TRIS
f
Load TRIS register
1
0000 0000 0fff
Z
XORLW
k
Exclusive OR Literal to W
1
1111 kkkk kkkk
Note 1: The 9th bit of the program counter will be forced to a ‘0’ by any instruction that writes to the PC except for
GOTO (see Section 3.5 “Program Counter” for more on program counter).
2: When an I/O register is modified as a function of itself (e.g., MOVF PORTB, 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’.
3: The instruction TRIS f, where f = 5, 6 or 7 causes the contents of the W register to be written to the
tri-state latches of PORTA, B or C, respectively. A ‘1’ forces the pin to a high-impedance state and
disables the output buffers.
4: If this instruction is executed on the TMR0 register (and, where applicable, d = 1), the prescaler will be
cleared (if assigned to TMR0).
DS41213D-page 42
© 2007 Microchip Technology Inc.
PIC16F5X
ADDWF
Add W and f
ANDWF
Syntax:
[ label ] ADDWF
Syntax:
[ label ] ANDWF
Operands:
0 ≤ f ≤ 31
d ∈ [0,1]
Operands:
0 ≤ f ≤ 31
d ∈ [0,1]
Operation:
(W) + (f) → (dest)
Operation:
(W) .AND. (f) → (dest)
Status Affected:
C, DC, Z
Status Affected:
Z
Encoding:
0001
11df
f, d
AND W with f
ffff
Encoding:
0001
01df
f, d
ffff
Description:
Add the contents of the W register
and 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:
The contents of the W register are
AND’ed 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’.
Words:
1
Words:
1
Cycles:
1
Example:
ANDWF
Cycles:
1
Example:
ADDWF
Before Instruction
W
=
TEMP_REG =
After Instruction
W
=
TEMP_REG =
TEMP_REG, 0
Before Instruction
W
=
TEMP_REG =
After Instruction
W
=
TEMP_REG =
0x17
0xC2
0xD9
0xC2
ANDLW
AND literal with W
Syntax:
[ label ] ANDLW
Operands:
0 ≤ k ≤ 255
Operation:
(W).AND. (k) → (W)
Status Affected:
Z
Encoding:
Description:
1110
kkkk
k
kkkk
The contents of the W register are
AND’ed with the eight-bit literal ‘k’.
The result is placed in the W
register.
Words:
1
Cycles:
1
Example:
ANDLW
H'5F'
Before Instruction
W
= 0xA3
After Instruction
W
= 0x03
© 2007 Microchip Technology Inc.
TEMP_REG, 1
0x17
0xC2
0x17
0x02
BCF
Bit Clear f
Syntax:
[ label ] BCF
Operands:
0 ≤ f ≤ 31
0≤b≤7
Operation:
0 → (f<b>)
Status Affected:
None
Encoding:
Description:
0100
bbbf
f, b
ffff
Bit ‘b’ in register ‘f’ is cleared.
Words:
1
Cycles:
1
Example:
BCF
Before Instruction
FLAG_REG =
After Instruction
FLAG_REG =
FLAG_REG,
7
0xC7
0x47
DS41213D-page 43
PIC16F5X
BSF
Bit Set f
BTFSS
Syntax:
[ label ] BSF
Syntax:
[ label ] BTFSS f, b
Operands:
0 ≤ f ≤ 31
0≤b≤7
Operands:
0 ≤ f ≤ 31
0≤b<7
Operation:
1 → (f<b>)
Operation:
skip if (f<b>) = 1
Status Affected:
None
Status Affected:
None
Encoding:
0101
f, b
Bit Test f, Skip if Set
bbbf
Description:
Bit ‘b’ in register ‘f’ is set.
Words:
1
Cycles:
1
Example:
BSF
Encoding:
ffff
FLAG_REG,
BTFSC
Bit Test f, Skip if Clear
Syntax:
[ label ] BTFSC f, b
Operands:
0 ≤ f ≤ 31
0≤b≤7
Operation:
skip if (f<b>) = 0
Status Affected:
None
Encoding:
0110
bbbf
ffff
Description:
If bit ‘b’ in register ‘f’ is ‘0’, then the
next instruction is skipped.
If bit ‘b’ is ‘0’, then the next instruction fetched during the current
instruction execution is discarded
and a NOP is executed instead,
making this a two-cycle instruction.
Words:
1
Cycles:
1(2)
Example:
HERE
BTFSC FLAG,1
FALSE GOTO
PROCESS_CODE
TRUE
•
•
•
Before Instruction
PC
After Instruction
if FLAG<1>
PC
if FLAG<1>
PC
DS41213D-page 44
bbbf
ffff
Description:
If bit ‘b’ in register ‘f’ is ‘1’, then the
next instruction is skipped.
If bit ‘b’ is ‘1’, then the next instruction fetched during the current
instruction execution is discarded
and a NOP is executed instead,
making this a two-cycle instruction.
Words:
1
Cycles:
1(2)
Example:
HERE
FALSE
TRUE
7
Before Instruction
FLAG_REG = 0x0A
After Instruction
FLAG_REG = 0x8A
0111
Before Instruction
PC
After Instruction
If FLAG<1>
PC
if FLAG<1>
PC
BTFSS FLAG,1
GOTO
PROCESS_CODE
•
•
•
=
address (HERE)
=
=
=
=
0,
address (FALSE);
1,
address (TRUE)
= address (HERE)
=
=
=
=
0,
address (TRUE);
1,
address(FALSE)
© 2007 Microchip Technology Inc.
PIC16F5X
CALL
Subroutine Call
CLRW
Syntax:
[ label ] CALL k
Syntax:
[ label ] CLRW
Operands:
0 ≤ k ≤ 255
Operands:
None
Operation:
(PC) + 1→ TOS;
k → PC<7:0>;
(Status<6:5>) → PC<10:9>;
0 → PC<8>
Operation:
00h → (W);
1→Z
Status Affected:
Z
Status Affected:
Encoding:
Description:
None
1001
kkkk
kkkk
Subroutine call. First, return
address (PC + 1) is pushed onto
the stack. The eight-bit immediate
address is loaded into PC bits
<7:0>. The upper bits PC<10:9>
are loaded from STATUS<6:5>,
PC<8> is cleared. CALL is a
two-cycle instruction.
Words:
1
Cycles:
2
Example:
HERE
CALL
Encoding:
Description:
Clear W
0000
0100
0000
The W register is cleared. Zero bit
(Z) is set.
Words:
1
Cycles:
1
Example:
CLRW
Before Instruction
W
= 0x5A
After Instruction
W
= 0x00
Z
= 1
THERE
Before Instruction
PC
= address (HERE)
After Instruction
PC
= address (THERE)
TOS = address (HERE + 1)
CLRF
Clear f
Syntax:
[ label ] CLRF
Operands:
CLRWDT
Clear Watchdog Timer
Syntax:
[ label ] CLRWDT
0 ≤ f ≤ 31
Operands:
None
Operation:
00h → (f);
1→Z
Operation:
Status Affected:
Z
00h → WDT;
0 → WDT prescaler (if assigned);
1 → TO;
1 → PD
Status Affected:
TO, PD
Encoding:
Description:
0000
011f
f
ffff
The contents of register ‘f’ are
cleared and the Z bit is set.
Words:
1
Cycles:
1
Example:
CLRF
Before Instruction
FLAG_REG =
After Instruction
FLAG_REG =
Z
=
Encoding:
0x00
1
0100
Words:
1
Cycles:
1
Example:
CLRWDT
Before Instruction
WDT counter
After Instruction
WDT counter
WDT prescaler
TO
PD
© 2007 Microchip Technology Inc.
0000
The CLRWDT instruction resets the
WDT. It also resets the prescaler if
the prescaler is assigned to the
WDT and not Timer0. Status bits
TO and PD are set.
FLAG_REG
0x5A
0000
Description:
=
?
=
=
=
=
0x00
0
1
1
DS41213D-page 45
PIC16F5X
COMF
Complement f
DECFSZ
Syntax:
[ label ] COMF
Syntax:
[ label ] DECFSZ f, d
Operands:
0 ≤ f ≤ 31
d ∈ [0,1]
Operands:
0 ≤ f ≤ 31
d ∈ [0,1]
Operation:
(f) → (dest)
Operation:
(f) – 1 → d;
Status Affected:
Z
Status Affected:
None
Encoding:
0010
01df
f, d
Decrement f, Skip if 0
ffff
Description:
The contents of register ‘f’ are
complemented. If ‘d’ is ‘0’, the
result is stored in the W register. If
‘d’ is ‘1’, the result is stored back in
register ‘f’.
Words:
1
Cycles:
1
Example:
COMF
Before Instruction
REG1
=
After Instruction
REG1
=
W
=
Words:
1
Cycles:
1(2)
0x13
0xEC
Example:
HERE
Syntax:
[ label ] DECF f, d
Operands:
0 ≤ f ≤ 31
d ∈ [0,1]
Operation:
(f) – 1 → (dest)
Status Affected:
Z
11df
ffff
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’.
Words:
1
Cycles:
1
Example:
DECF
Before Instruction
CNT
=
Z
=
After Instruction
CNT
=
Z
=
DS41213D-page 46
11df
ffff
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 ‘0’, the
next instruction, which is already
fetched, is discarded and a NOP is
executed instead making it a
two-cycle instruction.
0x13
Decrement f
0000
0010
Description:
REG1,0
DECF
Encoding:
Encoding:
skip if result = 0
DECFSZ
GOTO
CONTINUE •
•
•
Before Instruction
PC
=
After Instruction
CNT
=
if CNT
=
PC
=
if CNT
≠
PC
=
CNT, 1
LOOP
address(HERE)
CNT - 1;
0,
address (CONTINUE);
0,
address (HERE+1)
CNT, 1
0x01
0
0x00
1
© 2007 Microchip Technology Inc.
PIC16F5X
GOTO
Unconditional Branch
INCFSZ
Syntax:
[ label ]
Syntax:
[ label ]
Operands:
0 ≤ k ≤ 511
Operands:
Operation:
k → PC<8:0>;
STATUS<6:5> → PC<10:9>
0 ≤ f ≤ 31
d ∈ [0,1]
Operation:
(f) + 1 → (dest), skip if result = 0
None
Status Affected:
None
Status Affected:
Encoding:
Description:
GOTO k
101k
kkkk
kkkk
GOTO is an unconditional branch.
The 9-bit immediate value is
loaded into PC bits <8:0>. The
upper bits of PC are loaded from
STATUS<6:5>. GOTO is a twocycle instruction.
Words:
1
Cycles:
2
Example:
GOTO THERE
After Instruction
PC =
address (THERE)
INCF
Increment f
Syntax:
[ label ]
Operands:
0 ≤ f ≤ 31
d ∈ [0,1]
Operation:
(f) + 1 → (dest)
Status Affected:
Z
Encoding:
INCF f, d
0010
10df
ffff
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’.
Words:
1
Cycles:
1
Example:
INCF
Before Instruction
CNT
=
Z
=
After Instruction
CNT
=
Z
=
CNT,
Encoding:
Increment f, Skip if 0
0011
INCFSZ f, d
11df
ffff
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 ‘0’, then
the next instruction, which is
already fetched, is discarded and
a NOP is executed instead making
it a two-cycle instruction.
Words:
1
Cycles:
1(2)
Example:
HERE
INCFSZ
GOTO
CONTINUE •
•
•
Before Instruction
PC
=
After Instruction
CNT
=
if CNT
=
PC
=
if CNT
≠
PC
=
CNT, 1
LOOP
address (HERE)
CNT + 1;
0,
address (CONTINUE);
0,
address (HERE +1)
1
0xFF
0
0x00
1
© 2007 Microchip Technology Inc.
DS41213D-page 47
PIC16F5X
IORLW
Inclusive OR literal with W
MOVF
Syntax:
[ label ]
Syntax:
[ label ]
Operands:
0 ≤ k ≤ 255
Operands:
Operation:
(W) .OR. (k) → (W)
0 ≤ f ≤ 31
d ∈ [0,1]
Status Affected:
Z
Operation:
(f) → (dest)
Status Affected:
Z
Encoding:
Description:
1101
IORLW k
kkkk
kkkk
The contents of the W register are
OR’ed with the eight-bit literal ‘k’.
The result is placed in the W
register.
Words:
1
Cycles:
1
Example:
IORLW 0x35
Before Instruction
W = 0x9A
After Instruction
W = 0xBF
Z = 0
Encoding:
Move f
0010
MOVF f, d
00df
Description:
The contents of register ‘f’ is
moved to destination ‘d’. If ‘d’ is ‘0’,
destination is the W register. If ‘d’
is ‘1’, the destination is file
register ‘f’. ‘d’ is ‘1’ is useful to test
a file register since Status flag Z is
affected.
Words:
1
Cycles:
1
Example:
MOVF
FSR,
MOVLW
Syntax:
[ label ]
Syntax:
[ label ]
Operands:
0 ≤ f ≤ 31
d ∈ [0,1]
Operands:
0 ≤ k ≤ 255
Operation:
(W).OR. (f) → (dest)
k → (W)
Operation:
Status Affected:
None
Status Affected:
Z
Encoding:
Encoding:
Description:
0001
00df
Words:
1
Cycles:
1
Example:
IORWF
DS41213D-page 48
IORWF
f, d
ffff
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’.
Before Instruction
RESULT =
W
=
After Instruction
RESULT =
W
=
Z
=
0
After Instruction
W
= value in FSR register
Inclusive OR W with f
IORWF
ffff
Move Literal to W
1100
MOVLW k
kkkk
kkkk
Description:
The eight-bit literal ‘k’ is loaded
into the W register.
Words:
1
Cycles:
1
Example:
MOVLW
0x5A
After Instruction
W
= 0x5A
RESULT, 0
0x13
0x91
0x13
0x93
0
© 2007 Microchip Technology Inc.
PIC16F5X
MOVWF
Move W to f
Syntax:
[ label ]
Operands:
0 ≤ f ≤ 31
Operands:
None
Operation:
(W) → (f)
Operation:
(W) → OPTION
Status Affected:
None
Status Affected:
None
Encoding:
0000
MOVWF
001f
f
ffff
Description:
Move data from the W register to
register ‘f’.
Words:
1
Cycles:
1
Example:
MOVWF
Before Instruction
TEMP_REG
W
After Instruction
TEMP_REG
W
TEMP_REG
=
=
0xFF
0x4F
=
=
0x4F
0x4F
OPTION
Load OPTION Register
Syntax:
[ label ]
Encoding:
0000
OPTION
0000
0010
Description:
The content of the W register is
loaded into the Option register.
Words:
1
Cycles:
1
Example:
OPTION
Before Instruction
W
=
After Instruction
OPTION =
0x07
0x07
NOP
No Operation
RETLW
Return with Literal in W
Syntax:
[ label ]
Syntax:
[ label ]
Operands:
None
Operands:
0 ≤ k ≤ 255
Operation:
No operation
Operation:
Status Affected:
None
k → (W);
TOS → PC
Status Affected:
None
Encoding:
0000
NOP
0000
Description:
No operation.
Words:
1
Cycles:
1
Example:
NOP
0000
Encoding:
1000
kkkk
kkkk
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
Example:
CALL TABLE;W contains
;table offset
;value.
•
;W now has table
•
;value.
•
ADDWF PC ;W = offset
RETLW k1 ;Begin table
RETLW k2 ;
•
•
•
RETLW kn ; End of table
TABLE
Before Instruction
W
=
After Instruction
W
=
© 2007 Microchip Technology Inc.
RETLW k
0x07
value of k8
DS41213D-page 49
PIC16F5X
RLF
Rotate Left f through Carry
RRF
Syntax:
[ label ] RLF
Syntax:
[ label ]
Operands:
0 ≤ f ≤ 31
d ∈ [0,1]
Operands:
0 ≤ f ≤ 31
d ∈ [0,1]
Operation:
See description below
Operation:
See description below
Status Affected:
C
Status Affected:
C
Encoding:
Description:
0011
f, d
01df
ffff
The contents of register ‘f’ are
rotated one bit to the left through
the Carry Flag (STATUS<0>). 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
Encoding:
Description:
Rotate Right f through Carry
0011
1
Words:
1
Cycles:
1
Cycles:
1
Example:
RLF
Example:
RRF
1110 0110
0
1110 0110
1100 1100
1
REG1,0
Before Instruction
REG1
=
C
=
After Instruction
REG1
=
W
=
C
=
1110 0110
0
1110 0110
0111 0011
0
Sleep
Go into Standby Mode
Syntax:
[ label ] Sleep
Operands:
None
Operation:
00h → WDT;
0 → WDT prescaler; if assigned
1 → TO;
0 → PD
Status Affected:
TO, PD
Encoding:
DS41213D-page 50
ffff
register 'f'
C
Words:
Before Instruction
REG1
=
C
=
After Instruction
REG1
=
W
=
C
=
00df
The contents of register ‘f’ are
rotated one bit to the right through
the Carry Flag (STATUS<0>). If ‘d’
is ‘0’, the result is placed in the W
register. If ‘d’ is ‘1’, the result is
placed back in register ‘f’.
register 'f'
REG1,0
RRF f, d
0000
0000
0011
Description:
Time-out Status bit (TO) is set. The
power-down Status bit (PD) is
cleared. The WDT and its
prescaler are cleared.
The processor is put into Sleep
mode with the oscillator stopped.
See section on Sleep for more
details.
Words:
1
Cycles:
1
Example:
SLEEP
© 2007 Microchip Technology Inc.
PIC16F5X
SUBWF
Subtract W from f
SWAPF
Syntax:
[ label ] SUBWF f, d
Syntax:
[ label ] SWAPF f, d
Operands:
0 ≤ f ≤ 31
d ∈ [0,1]
Operands:
0 ≤ f ≤ 31
d ∈ [0,1]
Operation:
(f) – (W) → (dest)
Operation:
Status Affected:
C, DC, Z
(f<3:0>) → (dest<7:4>);
(f<7:4>) → (dest<3:0>)
Status Affected:
None
Encoding:
Description:
0000
10df
ffff
Subtract (2’s complement method)
the 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’.
Encoding:
Description:
Swap Nibbles in f
0011
1
Cycles:
1
Words:
1
SUBWF
Cycles:
1
Example:
SWAPF
REG1, 1
Before Instruction
REG1
=
3
W
=
2
C
=
?
After Instruction
REG1
=
1
W
=
2
C
=
1
; result is positive
Example 2:
Before Instruction
REG1
=
2
W
=
2
C
=
?
After Instruction
REG1
=
0
W
=
2
C
=
1
; result is zero
Example 3:
Before Instruction
REG1
=
1
W
=
2
C
=
?
After Instruction
REG1
=
0xFF
W
=
2
C
=
0
; result is negative
© 2007 Microchip Technology Inc.
ffff
The upper and lower nibbles of
register ‘f’ are exchanged. If ‘d’ is
‘0’, the result is placed in W
register. If ‘d’ is ‘1’, the result is
placed in register ‘f’.
Words:
Example 1:
10df
Before Instruction
REG1
=
After Instruction
REG1
=
W
=
REG1,
0
0xA5
0xA5
0x5A
TRIS
Load TRIS Register
Syntax:
[ label ] TRIS
Operands:
f = 5, 6, 7, 8 or 9
Operation:
(W) → TRIS register f
Status Affected:
None
Encoding:
Description:
0000
0000
f
0fff
TRIS register ‘f’ (f = 5, 6 or 7) is
loaded with the contents of the W
register.
Words:
1
Cycles:
1
Example:
TRIS
PORTB
Before Instruction
W
= 0xA5
After Instruction
TRISB = 0xA5
DS41213D-page 51
PIC16F5X
XORLW
Exclusive OR literal with W
Syntax:
[ label ] XORLW k
Operands:
0 ≤ k ≤ 255
Operation:
(W) .XOR. k → (W)
Status Affected:
Z
Encoding:
1111
kkkk
kkkk
Description:
The contents of the W register are
XOR’ed with the eight-bit literal ‘k’.
The result is placed in the W
register.
Words:
1
Cycles:
1
Example:
XORLW 0xAF
Before Instruction
W
= 0xB5
After Instruction
W
= 0x1A
XORWF
Exclusive OR W with f
Syntax:
[ label ] XORWF
Operands:
0 ≤ f ≤ 31
d ∈ [0,1]
Operation:
(W) .XOR. (f) → (dest)
Status Affected:
Z
Encoding:
Description:
0001
ffff
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’.
Words:
1
Cycles:
1
Example:
XORWF
Before Instruction
REG
=
W
=
After Instruction
REG
=
W
=
DS41213D-page 52
10df
f, d
REG,1
0xAF
0xB5
0x1A
0xB5
© 2007 Microchip Technology Inc.
PIC16F5X
10.0
DEVELOPMENT SUPPORT
The PIC® microcontrollers are supported with a full
range of hardware and software development tools:
• Integrated Development Environment
- MPLAB® IDE Software
• Assemblers/Compilers/Linkers
- MPASMTM Assembler
- MPLAB C18 and MPLAB C30 C Compilers
- MPLINKTM Object Linker/
MPLIBTM Object Librarian
- MPLAB ASM30 Assembler/Linker/Library
• Simulators
- MPLAB SIM Software Simulator
• Emulators
- MPLAB ICE 2000 In-Circuit Emulator
- MPLAB REAL ICE™ In-Circuit Emulator
• In-Circuit Debugger
- MPLAB ICD 2
• Device Programmers
- PICSTART® Plus Development Programmer
- MPLAB PM3 Device Programmer
- PICkit™ 2 Development Programmer
• Low-Cost Demonstration and Development
Boards and Evaluation Kits
10.1
MPLAB Integrated Development
Environment Software
The MPLAB IDE software brings an ease of software
development previously unseen in the 8/16-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)
- 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
• Visual device initializer for easy register
initialization
• 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
HI-TECH Software C Compilers and IAR
C Compilers
The MPLAB IDE allows you to:
• Edit your source files (either assembly or C)
• One touch assemble (or compile) and download
to PIC MCU emulator and simulator tools
(automatically updates all project information)
• Debug using:
- Source files (assembly or C)
- Mixed assembly and C
- 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.
© 2007 Microchip Technology Inc.
DS41213D-page 53
PIC16F5X
10.2
MPASM Assembler
The MPASM Assembler is a full-featured, universal
macro assembler for all PIC 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:
• 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
10.5
MPLAB ASM30 Assembler produces relocatable
machine code from symbolic assembly language for
dsPIC30F devices. MPLAB C30 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 dsPIC30F instruction set
Support for fixed-point and floating-point data
Command line interface
Rich directive set
Flexible macro language
MPLAB IDE compatibility
10.6
10.3
MPLAB C18 and MPLAB C30
C Compilers
The MPLAB C18 and MPLAB C30 Code Development
Systems are complete ANSI C compilers for
Microchip’s PIC18 and PIC24 families of microcontrollers and the dsPIC30 and dsPIC33 family of digital signal controllers. These compilers provide powerful
integration capabilities, superior code optimization and
ease of use not found with other compilers.
For easy source level debugging, the compilers provide
symbol information that is optimized to the MPLAB IDE
debugger.
10.4
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.
MPLAB ASM30 Assembler, Linker
and Librarian
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 C18 and
MPLAB C30 C Compilers, and the MPASM and
MPLAB ASM30 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.
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
DS41213D-page 54
© 2007 Microchip Technology Inc.
PIC16F5X
10.7
MPLAB ICE 2000
High-Performance
In-Circuit Emulator
The MPLAB ICE 2000 In-Circuit Emulator is intended
to provide the product development engineer with a
complete microcontroller design tool set for PIC
microcontrollers. Software control of the MPLAB ICE
2000 In-Circuit Emulator is advanced by the MPLAB
Integrated Development Environment, which allows
editing, building, downloading and source debugging
from a single environment.
The MPLAB ICE 2000 is a full-featured emulator
system with enhanced trace, trigger and data monitoring features. Interchangeable processor modules allow
the system to be easily reconfigured for emulation of
different processors. The architecture of the MPLAB
ICE 2000 In-Circuit Emulator allows expansion to
support new PIC microcontrollers.
The MPLAB ICE 2000 In-Circuit Emulator system has
been designed as a real-time emulation system with
advanced features that are typically found on more
expensive development tools. The PC platform and
Microsoft® Windows® 32-bit operating system were
chosen to best make these features available in a
simple, unified application.
10.8
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® and dsPIC® Flash microcontrollers with
the easy-to-use, powerful graphical user interface of the
MPLAB Integrated Development Environment (IDE),
included with each kit.
The MPLAB REAL ICE probe 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 the popular MPLAB ICD 2 system
(RJ11) or with the new high speed, noise tolerant, lowvoltage differential signal (LVDS) interconnection
(CAT5).
10.9
MPLAB ICD 2 In-Circuit Debugger
Microchip’s In-Circuit Debugger, MPLAB ICD 2, is a
powerful, low-cost, run-time development tool,
connecting to the host PC via an RS-232 or high-speed
USB interface. This tool is based on the Flash PIC
MCUs and can be used to develop for these and other
PIC MCUs and dsPIC DSCs. The MPLAB ICD 2 utilizes
the in-circuit debugging capability built into the Flash
devices. This feature, along with Microchip’s In-Circuit
Serial ProgrammingTM (ICSPTM) protocol, offers costeffective, in-circuit Flash debugging from the graphical
user interface of the MPLAB Integrated Development
Environment. This enables a designer to develop and
debug source code by setting breakpoints, single stepping and watching variables, and CPU status and
peripheral registers. Running at full speed enables
testing hardware and applications in real time. MPLAB
ICD 2 also serves as a development programmer for
selected PIC devices.
10.10 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 SD/MMC card for
file storage and secure data applications.
MPLAB REAL ICE is field upgradeable through future
firmware downloads in MPLAB IDE. In upcoming
releases of MPLAB IDE, new devices will be supported,
and new features will be added, such as software breakpoints and assembly code trace. MPLAB REAL ICE
offers significant advantages over competitive emulators
including low-cost, full-speed emulation, real-time
variable watches, trace analysis, complex breakpoints, a
ruggedized probe interface and long (up to three meters)
interconnection cables.
© 2007 Microchip Technology Inc.
DS41213D-page 55
PIC16F5X
10.11 PICSTART Plus Development
Programmer
10.13 Demonstration, Development and
Evaluation Boards
The PICSTART Plus Development Programmer is an
easy-to-use, low-cost, prototype programmer. It
connects to the PC via a COM (RS-232) port. MPLAB
Integrated Development Environment software makes
using the programmer simple and efficient. The
PICSTART Plus Development Programmer supports
most PIC devices in DIP packages up to 40 pins.
Larger pin count devices, such as the PIC16C92X and
PIC17C76X, may be supported with an adapter socket.
The PICSTART Plus Development Programmer is CE
compliant.
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.
10.12 PICkit 2 Development Programmer
The PICkit™ 2 Development Programmer is a low-cost
programmer and selected Flash device debugger with
an easy-to-use interface for programming many of
Microchip’s baseline, mid-range and PIC18F families of
Flash memory microcontrollers. The PICkit 2 Starter Kit
includes a prototyping development board, twelve
sequential lessons, software and HI-TECH’s PICC™
Lite C compiler, and is designed to help get up to speed
quickly using PIC® microcontrollers. The kit provides
everything needed to program, evaluate and develop
applications using Microchip’s powerful, mid-range
Flash memory family of microcontrollers.
DS41213D-page 56
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.
Check the Microchip web page (www.microchip.com)
and the latest “Product Selector Guide” (DS00148) for
the complete list of demonstration, development and
evaluation kits.
© 2007 Microchip Technology Inc.
PIC16F5X
11.0
ELECTRICAL SPECIFICATIONS FOR PIC16F54/57
Absolute Maximum Ratings(†)
Ambient Temperature under bias ......................................................................................................... -40°C to +125°C
Storage Temperature ........................................................................................................................... -65°C to +150°C
Voltage on VDD with respect to VSS ............................................................................................................ 0V to +6.5V
Voltage on MCLR with respect to VSS(1) ................................................................................................... 0V to +13.5V
Voltage on all other pins with respect to VSS ............................................................................... -0.6V to (VDD + 0.6V)
Total power dissipation(2) .................................................................................................................................. 800 mW
Max. current out of VSS pin ................................................................................................................................ 150 mA
Max. current into VDD pin ................................................................................................................................... 100 mA
Max. current into an input pin (T0CKI only)....................................................................................................... ±500 μA
Input clamp current, IIK (VI < 0 or VI > VDD) ....................................................................................................... ±20 mA
Output clamp current, IOK (VO < 0 or VO > VDD) ................................................................................................ ±20 mA
Max. output current sunk by any I/O pin .............................................................................................................. 25 mA
Max. output current sourced by any I/O pin ......................................................................................................... 25 mA
Max. output current sourced by a single I/O port (PORTA, B or C) ..................................................................... 50 mA
Max. output current sunk by a single I/O port (PORTA, B or C)........................................................................... 50 mA
Note 1: Voltage spikes below VSS at the MCLR pin, inducing currents greater than 80 mA, may cause latch-up.
Thus, a series resistor of 50 to 100Ω should be used when applying a “low” level to the MCLR pin rather
than pulling this pin directly to VSS.
2: Power Dissipation is calculated as follows: Pdis = VDD x {IDD – ∑ IOH} + ∑ {(VDD – VOH) x IOH} + ∑(VOL x IOL)
†NOTICE: Stresses above those listed under “Absolute 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 operation listings of this specification is not implied. Exposure to maximum rating conditions for
extended periods may affect device reliability.
© 2007 Microchip Technology Inc.
DS41213D-page 57
PIC16F5X
11.0
ELECTRICAL SPECIFICATIONS FOR PIC16F59 (continued)
Absolute Maximum Ratings(†)
Ambient Temperature under bias .........................................................................................................-40°C to +125°C
Storage Temperature............................................................................................................................-65°C to +150°C
Voltage on VDD with respect to VSS ............................................................................................................ 0V to +6.5V
Voltage on MCLR with respect to VSS(1) ................................................................................................... 0V to +13.5V
Voltage on all other pins with respect to VSS................................................................................ -0.6V to (VDD + 0.6V)
Total power dissipation(2) ..................................................................................................................................900 mW
Max. current out of VSS pins...............................................................................................................................250 mA
Max. current into VDD pins .................................................................................................................................200 mA
Max. current into an input pin (T0CKI only).......................................................................................................±500 μA
Input clamp current, IIK (VI < 0 or VI > VDD) .......................................................................................................±20 mA
Output clamp current, IOK (VO < 0 or VO > VDD) ................................................................................................±20 mA
Max. output current sunk by any I/O pin...............................................................................................................25 mA
Max. output current sourced by any I/O pin .........................................................................................................25 mA
Max. output current sourced by a single I/O port (PORTA, B, C, D or E)...........................................................100 mA
Max. output current sunk by a single I/O port (PORTA, B, C, D or E)................................................................100 mA
Note 1: Voltage spikes below VSS at the MCLR pin, inducing currents greater than 80 mA, may cause latch-up.
Thus, a series resistor of 50 to 100Ω should be used when applying a “low” level to the MCLR pin rather
than pulling this pin directly to VSS.
2: Power Dissipation is calculated as follows: Pdis = VDD x {IDD – ∑ IOH} + ∑ {(VDD – VOH) x IOH} + ∑(VOL x IOL)
†NOTICE: Stresses above those listed under “Absolute 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 operation listings of this specification is not implied. Exposure to maximum rating conditions for
extended periods may affect device reliability.
DS41213D-page 58
© 2007 Microchip Technology Inc.
PIC16F5X
PIC16F5X VOLTAGE-FREQUENCY GRAPH, -40°C ≤ TA ≤ +125°C
FIGURE 11-1:
5.5
5.0
4.5
VDD
(Volts)
4.0
3.5
3.0
2.5
2.0
0
4
8
10
12
16
20
Frequency (MHz)
Note 1: The shaded region indicates the permissible combinations of voltage and frequency.
© 2007 Microchip Technology Inc.
DS41213D-page 59
PIC16F5X
11.1
DC Characteristics: PIC16F5X (Industrial)
DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40°C ≤ TA ≤ +85°C for industrial
Param
Sym.
No.
Min. Typ† Max. Units
Characteristic/Device
Conditions
D001
VDD
Supply Voltage
2.0
—
5.5
V
D002
VDR
RAM Data Retention Voltage(1)
—
1.5*
—
V
Device in Sleep mode
D003
VPOR VDD Start Voltage to ensure
Power-on Reset
—
Vss
—
V
See Section 5.1 “Power-on Reset
(POR)” for details on Power-on Reset
D004
SVDD VDD Rise Rate to ensure
Power-on Reset
0.05*
—
—
D010
IDD
—
170
350
—
—
—
0.4
1.7
15
1.0
5.0
22.5
—
—
1.0
0.5
6.0
2.5
D020
IPD
V/ms See Section 5.1 “Power-on Reset
(POR)” for details on Power-on Reset
Supply Current(2)
μA
FOSC = 4 MHz, VDD = 2.0V, XT or RC
mode(3)
mA FOSC = 10 MHz, VDD = 3.0V, HS mode
mA FOSC = 20 MHz, VDD = 5.0V, HS mode
μA FOSC = 32 kHz, VDD = 2.0V, LP mode,
WDT disabled
Power-down Current(2)
μA
μA
VDD = 2.0V, WDT enabled
VDD = 2.0V, WDT disabled
* These parameters are characterized but not tested.
† Data in “Typ” column is based on characterization results at 25°C. This data is for design guidance only and
is not tested.
Note 1: This is the limit to which VDD can be lowered in Sleep mode without losing RAM data.
2: The supply current is mainly a function of the operating voltage and frequency. Other factors such as bus
loading, oscillator type, bus rate, internal code execution pattern and temperature, also have an impact on
the current consumption.
a) The test conditions for all IDD measurements in Active Operation mode are: OSC1 = external square
wave, from rail-to-rail; all I/O pins tri-stated, pulled to VSS, T0CKI = VDD, MCLR = VDD; WDT enabled/
disabled as specified.
b) For standby current measurements, the conditions are the same, except that the device is in Sleep
mode. The Power-down Current in Sleep mode does not depend on the oscillator type.
3: Does not include current through REXT. The current through the resistor can be estimated by the formula:
IR = VDD/2REXT (mA) with REXT in kΩ.
DS41213D-page 60
© 2007 Microchip Technology Inc.
PIC16F5X
11.2
DC Characteristics: PIC16F5X (Extended)
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40°C ≤ TA ≤ +125°C for extended
DC CHARACTERISTICS
Param
Sym.
No.
D001
VDD
Characteristic/Device
Supply Voltage
RAM Data Retention Voltage
D002
VDR
D003
VPOR VDD Start Voltage to ensure
Power-on Reset
D004
SVDD VDD Rise Rate to ensure
Power-on Reset
D010
IDD
D020
IPD
(1)
Min.
Typ†
2.0
—
Max. Units
5.5
Conditions
V
—
1.5*
—
V
Device in Sleep mode
—
VSS
—
V
See Section 5.1 “Power-on Reset
(POR)” for details on Power-on Reset
0.05*
—
—
—
170
450
μA
—
—
—
0.4
1.7
15
2.0
7.0
40
mA
mA
μA
—
—
1.0
0.5
15.0
8.0
μA
μA
V/ms See Section 5.1 “Power-on Reset
(POR)” for details on Power-on Reset
Supply Current(2)
FOSC = 4 MHz, VDD = 2.0V, XT or RC
mode(3)
FOSC = 10 MHz, VDD = 3.0V, HS mode
FOSC = 20 MHz, VDD = 5.0V, HS mode
FOSC = 32 kHz, VDD = 2.0V, LP mode,
WDT disabled
Power-down Current(2)
VDD = 2.0V, WDT enabled
VDD = 2.0V, WDT disabled
* These parameters are characterized but not tested.
† Data in “Typ” column is based on characterization results at 25°C. This data is for design guidance only and
is not tested.
Note 1: This is the limit to which VDD can be lowered in Sleep mode without losing RAM data.
2: The supply current is mainly a function of the operating voltage and frequency. Other factors such as bus
loading, oscillator type, bus rate, internal code execution pattern and temperature, also have an impact on
the current consumption.
a) The test conditions for all IDD measurements in Active Operation mode are: OSC1 = external square
wave, from rail-to-rail; all I/O pins tri-stated, pulled to VSS, T0CKI = VDD, MCLR = VDD; WDT enabled/
disabled as specified.
b) For standby current measurements, the conditions are the same, except that the device is in Sleep
mode. The Power-down Current in Sleep mode does not depend on the oscillator type.
3: Does not include current through REXT. The current through the resistor can be estimated by the formula:
IR = VDD/2REXT (mA) with REXT in kΩ.
© 2007 Microchip Technology Inc.
DS41213D-page 61
PIC16F5X
11.3
DC Characteristics PIC16F5X
DC CHARACTERISTICS
Param
Sym.
No.
VIL
D030
Characteristic
VIH
Min.
Typ†
Max.
Units
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
—
—
—
—
—
—
—
—
0.8V
0.15 VDD
0.15 VDD
0.15 VDD
0.15 VDD
0.3 VDD
0.3
0.3
V
V
V
V
V
V
V
V
4.5V <VDD ≤ 5.5V
VDD ≤ 4.5V
—
—
—
—
—
—
—
—
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
V
V
V
V
V
V
V
V
4.5V < VDD ≤ 5.5V
VDD ≤ 4.5V
D060
VSS ≤ VPIN ≤ VDD,
pin at high-impedance
VSS ≤ VPIN ≤ VDD
VSS ≤ VPIN ≤ VDD
VSS ≤ VPIN ≤ VDD,
XT, HS and LP modes
VOL
D080
D083
RC mode(3)
HS mode
XT mode
LP mode
Input Leakage Current(1, 2)
I/O ports
—
—
±1.0
μA
MCLR
T0CKI
OSC1
—
—
—
—
—
—
±5.0
±5.0
±5.0
μA
μA
μA
—
—
—
—
0.6
0.6
V
V
IOL = 8.5 mA, VDD = 4.5V
IOL = 1.6 mA, VDD = 4.5V
VDD – 0.7
VDD – 0.7
—
—
—
—
V
V
IOH = -3.0 mA, VDD = 4.5V
IOH = -1.3 mA, VDD = 4.5V
Output Low Voltage
I/O ports
OSC2/CLKOUT
(RC mode)
VOH
RC mode(3)
HS mode
XT mode
LP mode
Input High Voltage
I/O ports
2.0
I/O ports
0.25 VDD + 0.8
0.85 VDD
MCLR (Schmitt Trigger)
T0CKI (Schmitt Trigger)
0.85 VDD
OSC1 (Schmitt Trigger)
0.85 VDD
0.7 VDD
OSC1
1.6
1.6
IIL
Conditions
Input Low Voltage
I/O Ports
I/O Ports
MCLR (Schmitt Trigger)
T0CKI (Schmitt Trigger)
OSC1 (Schmitt Trigger)
OSC1
D040
D090
D092
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40°C ≤ TA ≤ +85°C for industrial
-40°C ≤ TA ≤ +125°C for extended
Output High Voltage(2)
I/O ports(2)
OSC2/CLKOUT
(RC mode)
* These parameters are characterized but not tested.
† Data in the Typical (“Typ”) column is based on characterization results at 25°C. This data is for design
guidance only and is not tested.
Note 1: The leakage current on the MCLR/VPP pin is strongly dependent on the applied voltage level. The
specified levels represent normal operating conditions. Higher leakage current may be measured at
different input voltage.
2: Negative current is defined as coming out of the pin.
3: For the RC mode, the OSC1/CLKIN pin is a Schmitt Trigger input. It is not recommended that the
PIC16F5X be driven with external clock in RC mode.
DS41213D-page 62
© 2007 Microchip Technology Inc.
PIC16F5X
11.4
Timing Parameter Symbology and Load Conditions
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
2
to
ck CLKOUT
cy cycle time
drt device reset timer
io I/O port
Uppercase letters and their meanings:
S
F Fall
H High
I
Invalid (High-impedance)
L Low
FIGURE 11-2:
T
Time
mc
osc
os
t0
wdt
MCLR
oscillator
OSC1
T0CKI
watchdog timer
P
R
V
Z
Period
Rise
Valid
High-impedance
LOAD CONDITIONS FOR DEVICE TIMING SPECIFICATIONS – PIC16F5X
Pin
Legend:
CL
CL =
50 pF
for all pins and OSC2 for RC mode
0-15 pF
for OSC2 in XT, HS or LP modes when
external clock is used to drive OSC1
VSS
11.5
Timing Diagrams and Specifications
FIGURE 11-3:
EXTERNAL CLOCK TIMING
Q4
Q1
Q3
Q2
Q4
Q1
OSC1
1
3
3
4
4
2
CLKOUT
© 2007 Microchip Technology Inc.
DS41213D-page 63
PIC16F5X
TABLE 11-1:
EXTERNAL CLOCK TIMING REQUIREMENTS
Standard Operating Conditions (unless otherwise specified)
AC CHARACTERISTICS Operating Temperature
-40°C ≤ TA ≤ +85°C for industrial
-40°C ≤ TA ≤ +125°C for extended
Parameter
No.
Sym.
FOSC
Characteristic
External CLKIN Frequency(1)
Oscillator Frequency(1)
1
TOSC
External CLKIN Period(1)
Oscillator Period(1)
Min.
Typ†
Max.
Units
DC
—
4.0
MHz XT Osc mode
DC
—
20
MHz HS Osc mode
DC
—
200
kHz
DC
—
4.0
MHz RC Osc mode
0.1
—
4.0
MHz XT Osc mode
4.0
—
20
MHz HS Osc mode
5.0
—
200
kHz
LP Osc mode
250
—
—
ns
XT Osc mode
50
—
—
ns
HS Osc mode
—
—
μs
LP Osc mode
250
—
—
ns
RC Osc mode
250
—
10,000
ns
XT Osc mode
50
—
250
ns
HS Osc mode
5.0
—
—
μs
LP Osc mode
TCY
Instruction Cycle Time(2)
—
4/FOSC
—
—
3
TosL, TosH
Clock in (OSC1) Low or High
Time
50*
—
—
ns
TosR, TosF
Clock in (OSC1) Rise or Fall
Time
LP Osc mode
5.0
2
4
Conditions
XT oscillator
20*
—
—
ns
HS oscillator
2.0*
—
—
μs
LP oscillator
—
—
25*
ns
XT oscillator
—
—
5*
ns
HS oscillator
—
—
50*
ns
LP oscillator
* These parameters are characterized but not tested.
† Data in the Typical (“Typ”) column is at 5V, 25°C unless otherwise stated. These parameters are for design
guidance only and are not tested.
Note 1: All specified values are based on characterization data for that particular oscillator type under standard
operating conditions with the device executing code. Exceeding these specified limits may result in an
unstable oscillator operation and/or higher than expected current consumption.
When an external clock input is used, the “max” cycle time limit is “DC” (no clock) for all devices.
2: Instruction cycle period (TCY) equals four times the input oscillator time base period.
DS41213D-page 64
© 2007 Microchip Technology Inc.
PIC16F5X
FIGURE 11-4:
CLKOUT AND I/O TIMING – PIC16F5X
Q1
Q4
Q2
Q3
OSC1
11
10
CLKOUT
13
14
12
18
19
16
I/O Pin
(input)
15
17
I/O Pin
(output)
New Value
Old Value
20, 21
Note:
TABLE 11-2:
Param
No.
Please refer to Figure 11-2 for load conditions.
CLKOUT AND I/O TIMING REQUIREMENTS – PIC16F5X
Sym.
Characteristic
Min.
Typ†
Max.
Units
15
30**
ns
10
TosH2CKL OSC1↑ to CLKOUT↓(1)
—
11
TosH2CKH OSC1↑ to
CLKOUT↑(1)
—
15
30**
ns
12
TCKR
CLKOUT rise time(1)
—
5.0
15**
ns
13
TCKF
CLKOUT fall time(1)
—
5.0
15**
ns
14
TCKL2IOV
CLKOUT↓ to Port out valid(1)
—
—
40**
ns
CLKOUT↑(1)
15
TIOV2CKH Port in valid before
16
TCKH2IOI
17
TOSH2IOV OSC1↑ (Q1 cycle) to Port out valid(2)
18
TOSH2IOI
19
TIOV2OSH Port input valid to OSC1↑
(I/O in setup time)
20
TIOR
20
Port in hold after CLKOUT↑(1)
0.25 TCY+30*
—
—
ns
0*
—
—
ns
—
—
100*
ns
TBD
—
—
ns
TBD
—
—
ns
Port output rise time(2, 3)
—
10
25**
ns
TIOR
Port output rise time(2, 4)
—
10
50**
ns
21
TIOF
Port output fall time(2, 3)
—
10
25**
ns
21
TIOF
Port output fall time(2, 4)
—
10
50**
ns
Legend:
*
**
†
Note 1:
2:
3:
4:
OSC1↑ (Q2 cycle) to Port input invalid
(I/O in hold time)
TBD = To Be Determined.
These parameters are characterized but not tested.
These parameters are design targets and are not tested. No characterization data available at this time.
Data in the Typical (“Typ”) column is at 5.0V, 25°C unless otherwise stated. These parameters are for
design guidance only and are not tested.
Measurements are taken in RC mode where CLKOUT output is 4 x TOSC.
Please refer to Figure 11-2 for load conditions.
PIC16F54/57 only.
PIC16F59 only.
© 2007 Microchip Technology Inc.
DS41213D-page 65
PIC16F5X
FIGURE 11-5:
RESET, WATCHDOG TIMER, AND DEVICE RESET TIMER TIMING -– PIC16F5X
VDD
MCLR
30
Internal
POR
32
32
32
DRT
Time-out
Internal
RESET
Watchdog
Timer
Reset
31
34
34
I/O pin(1)
Note 1:
Please refer to Figure 11-2 for load conditions.
TABLE 11-3:
RESET, WATCHDOG TIMER AND DEVICE RESET TIMER – PIC16F5X
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40°C ≤ TA ≤ +85°C for industrial
-40°C ≤ TA ≤ +125°C for extended
AC CHARACTERISTICS
Param
Sym.
No.
Characteristic
Min.
Typ† Max. Units
Conditions
2000*
—
—
ns
VDD = 5.0V
30
TMCL
MCLR Pulse Width (low)
31
TWDT
Watchdog Timer Time-out Period
(No Prescaler)
9.0*
9.0*
18*
18*
30*
40*
ms
VDD = 5.0V (industrial)
VDD = 5.0V (extended)
32
TDRT
Device Reset Timer Period
9.0*
9.0*
18*
18*
30*
40*
ms
VDD = 5.0V (industrial)
VDD = 5.0V (extended)
34
TIOZ
I/O high-impedance from MCLR
Low
100*
300* 2000*
ns
* These parameters are characterized but not tested.
† Data in the Typical (“Typ”) column is at 5.0V, 25°C unless otherwise stated. These parameters are for
design guidance only and are not tested.
DS41213D-page 66
© 2007 Microchip Technology Inc.
PIC16F5X
FIGURE 11-6:
TIMER0 CLOCK TIMINGS – PIC16F5X
T0CKI
40
41
42
Note:
Please refer to Figure 11-2 for load conditions.
TABLE 11-4:
TIMER0 CLOCK REQUIREMENTS – PIC16F5X
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40°C ≤ TA ≤ +85°C for industrial
-40°C ≤ TA ≤ +125°C for extended
AC CHARACTERISTICS
Param
No.
40
41
Sym.
Min.
Typ†
Max.
Units
Tt0H T0CKI High Pulse Width:
No Prescaler
0.5 TCY + 20*
—
—
ns
With Prescaler
10*
—
—
ns
0.5 TCY + 20*
—
—
ns
10*
—
—
ns
20 or TCY + 40*
N
—
—
ns
Tt0L
Characteristic
T0CKI Low Pulse Width:
No Prescaler
With Prescaler
42
Tt0P T0CKI Period
Conditions
Whichever is greater.
N = Prescale Value
(1, 2, 4,..., 256)
* These parameters are characterized but not tested.
† Data in the Typical (“Typ”) column is at 5.0V, 25°C unless otherwise stated. These parameters are for
design guidance only and are not tested.
© 2007 Microchip Technology Inc.
DS41213D-page 67
PIC16F5X
NOTES:
DS41213D-page 68
© 2007 Microchip Technology Inc.
PIC16F5X
12.0
PACKAGING INFORMATION
12.1
Package Marketing Information
18-Lead PDIP
Example
XXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
PIC16F54
-I/P e3
YYWWNNN
0723CBA
18-Lead SOIC
Example
XXXXXXXXXXXX
XXXXXXXXXXXX
XXXXXXXXXXXX
PIC16F54
-E/SO e3
0718CDK
YYWWNNN
Example
20-Lead SSOP
XXXXXXXXXXX
XXXXXXXXXXX
YYWWNNN
PIC16F54
-E/SS e3
0720CBP
28-Lead PDIP
Example
XXXXXXXXXXXXXXX
XXXXXXXXXXXXXXX
XXXXXXXXXXXXXXX
YYWWNNN
>h
Legend: XX...X
Y
YY
WW
NNN
e3
*
Note:
*
PIC16F57
-I/P e3
0723CBA
>h
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.
Standard PIC device marking consists of Microchip part number, year code, week code, and traceability
code. For PIC device marking beyond this, certain price adders apply. Please check with your Microchip
Sales Office. For QTP devices, any special marking adders are included in QTP price.
© 2007 Microchip Technology Inc.
DS41213D-page 69
PIC16F5X
Package Marking Information (Continued)
28-Lead SOIC
XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXX
YYWWNNN
28-Lead SSOP
XXXXXXXXXXXX
XXXXXXXXXXXX
YYWWNNN
28-Lead SPDIP (.300")
XXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
YYWWNNN
>h
Example
PIC16F57
-E/SO e3
0718CDK
Example
PIC16F57
-E/SS e3
0725CBK
Example
PIC16F57
-I/P e3
0717HAT
>h
40-Lead PDIP (.600")
XXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXX
YYWWNNN
>h
PIC16F59
-I/P e3
0712SAA
>h
44-Lead TQFP
M
M
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX
YYWWNNN
PIC16F59
-04/PT e3
0711HAT
DS41213D-page 70
© 2007 Microchip Technology Inc.
PIC16F5X
18-Lead Plastic Dual In-Line (P) – 300 mil Body [PDIP]
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
N
NOTE 1
E1
1
2
3
D
E
A2
A
L
c
A1
b1
b
e
eB
Units
Dimension Limits
Number of Pins
INCHES
MIN
N
NOM
MAX
18
Pitch
e
Top to Seating Plane
A
–
–
.210
Molded Package Thickness
A2
.115
.130
.195
Base to Seating Plane
A1
.015
–
–
Shoulder to Shoulder Width
E
.300
.310
.325
Molded Package Width
E1
.240
.250
.280
Overall Length
D
.880
.900
.920
Tip to Seating Plane
L
.115
.130
.150
Lead Thickness
c
.008
.010
.014
b1
.045
.060
.070
b
.014
.018
.022
eB
–
–
Upper Lead Width
Lower Lead Width
Overall Row Spacing §
.100 BSC
.430
Notes:
1. Pin 1 visual index feature may vary, but must be located within the hatched area.
2. § Significant Characteristic.
3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010" per side.
4. Dimensioning and tolerancing per ASME Y14.5M.
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
Microchip Technology Drawing C04-007B
© 2007 Microchip Technology Inc.
DS41213D-page 71
PIC16F5X
18-Lead Plastic Small Outline (SO) – Wide, 7.50 mm Body [SOIC]
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
D
N
E
E1
NOTE 1
1
2 3
b
e
α
h
h
c
φ
A2
A
A1
β
L
L1
Units
Dimension Limits
Number of Pins
MILLIMETERS
MIN
N
NOM
MAX
18
Pitch
e
Overall Height
A
–
1.27 BSC
–
Molded Package Thickness
A2
2.05
–
–
Standoff §
A1
0.10
–
0.30
Overall Width
E
Molded Package Width
E1
7.50 BSC
Overall Length
D
11.55 BSC
2.65
10.30 BSC
Chamfer (optional)
h
0.25
–
0.75
Foot Length
L
0.40
–
1.27
Footprint
L1
1.40 REF
Foot Angle
φ
0°
–
8°
Lead Thickness
c
0.20
–
0.33
Lead Width
b
0.31
–
0.51
Mold Draft Angle Top
α
5°
–
15°
Mold Draft Angle Bottom
β
5°
–
15°
Notes:
1. Pin 1 visual index feature may vary, but must be located within the hatched area.
2. § Significant Characteristic.
3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15 mm per side.
4. Dimensioning and tolerancing per ASME Y14.5M.
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
REF: Reference Dimension, usually without tolerance, for information purposes only.
Microchip Technology Drawing C04-051B
DS41213D-page 72
© 2007 Microchip Technology Inc.
PIC16F5X
20-Lead Plastic Shrink Small Outline (SS) – 5.30 mm Body [SSOP]
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
D
N
E
E1
NOTE 1
1 2
b
e
c
A2
A
φ
A1
L1
Units
Dimension Limits
Number of Pins
L
MILLIMETERS
MIN
N
NOM
MAX
20
Pitch
e
Overall Height
A
–
0.65 BSC
–
2.00
Molded Package Thickness
A2
1.65
1.75
1.85
Standoff
A1
0.05
–
–
Overall Width
E
7.40
7.80
8.20
Molded Package Width
E1
5.00
5.30
5.60
Overall Length
D
6.90
7.20
7.50
Foot Length
L
0.55
0.75
0.95
Footprint
L1
1.25 REF
Lead Thickness
c
0.09
–
Foot Angle
φ
0°
4°
0.25
8°
Lead Width
b
0.22
–
0.38
Notes:
1. Pin 1 visual index feature may vary, but must be located within the hatched area.
2. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.20 mm per side.
3. Dimensioning and tolerancing per ASME Y14.5M.
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
REF: Reference Dimension, usually without tolerance, for information purposes only.
Microchip Technology Drawing C04-072B
© 2007 Microchip Technology Inc.
DS41213D-page 73
PIC16F5X
28-Lead Skinny Plastic Dual In-Line (SP) – 300 mil Body [SPDIP]
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
N
NOTE 1
E1
1
2
3
D
E
A2
A
L
c
b1
A1
b
e
eB
Units
Dimension Limits
Number of Pins
INCHES
MIN
N
NOM
MAX
28
Pitch
e
Top to Seating Plane
A
–
–
.200
Molded Package Thickness
A2
.120
.135
.150
Base to Seating Plane
A1
.015
–
–
Shoulder to Shoulder Width
E
.290
.310
.335
Molded Package Width
E1
.240
.285
.295
Overall Length
D
1.345
1.365
1.400
Tip to Seating Plane
L
.110
.130
.150
Lead Thickness
c
.008
.010
.015
b1
.040
.050
.070
b
.014
.018
.022
eB
–
–
Upper Lead Width
Lower Lead Width
Overall Row Spacing §
.100 BSC
.430
Notes:
1. Pin 1 visual index feature may vary, but must be located within the hatched area.
2. § Significant Characteristic.
3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010" per side.
4. Dimensioning and tolerancing per ASME Y14.5M.
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
Microchip Technology Drawing C04-070B
DS41213D-page 74
© 2007 Microchip Technology Inc.
PIC16F5X
28-Lead Plastic Dual In-Line (P) – 600 mil Body [PDIP]
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
N
E1
NOTE 1
1 2 3
D
E
A2
A
L
c
b1
A1
b
e
eB
Units
Dimension Limits
Number of Pins
INCHES
MIN
N
NOM
MAX
28
Pitch
e
Top to Seating Plane
A
–
–
.250
Molded Package Thickness
A2
.125
–
.195
Base to Seating Plane
A1
.015
–
–
Shoulder to Shoulder Width
E
.590
–
.625
Molded Package Width
E1
.485
–
.580
Overall Length
D
1.380
–
1.565
Tip to Seating Plane
L
.115
–
.200
Lead Thickness
c
.008
–
.015
b1
.030
–
.070
b
.014
–
.022
eB
–
–
Upper Lead Width
Lower Lead Width
Overall Row Spacing §
.100 BSC
.700
Notes:
1. Pin 1 visual index feature may vary, but must be located within the hatched area.
2. § Significant Characteristic.
3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010" per side.
4. Dimensioning and tolerancing per ASME Y14.5M.
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
Microchip Technology Drawing C04-079B
© 2007 Microchip Technology Inc.
DS41213D-page 75
PIC16F5X
28-Lead Plastic Small Outline (SO) – Wide, 7.50 mm Body [SOIC]
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
D
N
E
E1
NOTE 1
1 2 3
b
e
h
α
A2
A
h
c
φ
L
A1
L1
Units
Dimension Limits
Number of Pins
β
MILLIMETERS
MIN
N
NOM
MAX
28
Pitch
e
Overall Height
A
–
1.27 BSC
–
Molded Package Thickness
A2
2.05
–
–
Standoff §
A1
0.10
–
0.30
Overall Width
E
Molded Package Width
E1
7.50 BSC
Overall Length
D
17.90 BSC
2.65
10.30 BSC
Chamfer (optional)
h
0.25
–
0.75
Foot Length
L
0.40
–
1.27
Footprint
L1
1.40 REF
Foot Angle Top
φ
0°
–
8°
Lead Thickness
c
0.18
–
0.33
Lead Width
b
0.31
–
0.51
Mold Draft Angle Top
α
5°
–
15°
Mold Draft Angle Bottom
β
5°
–
15°
Notes:
1. Pin 1 visual index feature may vary, but must be located within the hatched area.
2. § Significant Characteristic.
3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15 mm per side.
4. Dimensioning and tolerancing per ASME Y14.5M.
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
REF: Reference Dimension, usually without tolerance, for information purposes only.
Microchip Technology Drawing C04-052B
DS41213D-page 76
© 2007 Microchip Technology Inc.
PIC16F5X
28-Lead Plastic Shrink Small Outline (SS) – 5.30 mm Body [SSOP]
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
D
N
E
E1
1 2
NOTE 1
b
e
c
A2
A
φ
A1
L
L1
Units
Dimension Limits
Number of Pins
MILLIMETERS
MIN
N
NOM
MAX
28
Pitch
e
Overall Height
A
–
0.65 BSC
–
2.00
Molded Package Thickness
A2
1.65
1.75
1.85
Standoff
A1
0.05
–
–
Overall Width
E
7.40
7.80
8.20
Molded Package Width
E1
5.00
5.30
5.60
Overall Length
D
9.90
10.20
10.50
Foot Length
L
0.55
0.75
0.95
Footprint
L1
1.25 REF
Lead Thickness
c
0.09
–
Foot Angle
φ
0°
4°
0.25
8°
Lead Width
b
0.22
–
0.38
Notes:
1. Pin 1 visual index feature may vary, but must be located within the hatched area.
2. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.20 mm per side.
3. Dimensioning and tolerancing per ASME Y14.5M.
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
REF: Reference Dimension, usually without tolerance, for information purposes only.
Microchip Technology Drawing C04-073B
© 2007 Microchip Technology Inc.
DS41213D-page 77
PIC16F5X
40-Lead Plastic Dual In-Line (P) – 600 mil Body [PDIP]
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
N
NOTE 1
E1
1 2 3
D
E
A2
A
L
c
b1
A1
b
e
eB
Units
Dimension Limits
Number of Pins
INCHES
MIN
N
NOM
MAX
40
Pitch
e
Top to Seating Plane
A
–
–
.250
Molded Package Thickness
A2
.125
–
.195
Base to Seating Plane
A1
.015
–
–
Shoulder to Shoulder Width
E
.590
–
.625
Molded Package Width
E1
.485
–
.580
Overall Length
D
1.980
–
2.095
Tip to Seating Plane
L
.115
–
.200
Lead Thickness
c
.008
–
.015
b1
.030
–
.070
b
.014
–
.023
eB
–
–
Upper Lead Width
Lower Lead Width
Overall Row Spacing §
.100 BSC
.700
Notes:
1. Pin 1 visual index feature may vary, but must be located within the hatched area.
2. § Significant Characteristic.
3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010" per side.
4. Dimensioning and tolerancing per ASME Y14.5M.
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
Microchip Technology Drawing C04-016B
DS41213D-page 78
© 2007 Microchip Technology Inc.
PIC16F5X
44-Lead Plastic Thin Quad Flatpack (PT) – 10x10x1 mm Body, 2.00 mm Footprint [TQFP]
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
D
D1
E
e
E1
N
b
NOTE 1
1 2 3
NOTE 2
α
A
c
φ
β
L
A1
Units
Dimension Limits
Number of Leads
A2
L1
MILLIMETERS
MIN
N
NOM
MAX
44
Lead Pitch
e
Overall Height
A
–
0.80 BSC
–
Molded Package Thickness
A2
0.95
1.00
1.05
Standoff
A1
0.05
–
0.15
Foot Length
L
0.45
0.60
0.75
Footprint
L1
1.20
1.00 REF
Foot Angle
φ
Overall Width
E
12.00 BSC
Overall Length
D
12.00 BSC
Molded Package Width
E1
10.00 BSC
Molded Package Length
D1
10.00 BSC
0°
3.5°
7°
Lead Thickness
c
0.09
–
0.20
Lead Width
b
0.30
0.37
0.45
Mold Draft Angle Top
α
11°
12°
13°
Mold Draft Angle Bottom
β
11°
12°
13°
Notes:
1. Pin 1 visual index feature may vary, but must be located within the hatched area.
2. Chamfers at corners are optional; size may vary.
3. Dimensions D1 and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.25 mm per side.
4. Dimensioning and tolerancing per ASME Y14.5M.
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
REF: Reference Dimension, usually without tolerance, for information purposes only.
Microchip Technology Drawing C04-076B
© 2007 Microchip Technology Inc.
DS41213D-page 79
PIC16F5X
APPENDIX A:
DATA SHEET
REVISION HISTORY
Revision D (04/2007)
Changed PICmicro to PIC; Replaced Dev. Tool
Section; Updated Package Marking Information and
replaced Package Drawings (Rev. AP)
DS41213D-page 80
© 2007 Microchip Technology Inc.
PIC16F5X
A
G
Absolute Maximum Ratings
PIC1654/57 ................................................................. 57
PIC1659 ...................................................................... 58
ADDWF ............................................................................... 43
ALU ....................................................................................... 7
ANDLW ............................................................................... 43
ANDWF ............................................................................... 43
Applications........................................................................... 5
Architectural Overview .......................................................... 7
Assembler
MPASM Assembler..................................................... 54
GOTO ........................................................................... 19, 47
B
Block Diagram
On-Chip Reset Circuit ................................................. 24
PIC16F5X Series .......................................................... 8
Timer0......................................................................... 33
TMR0/WDT Prescaler................................................. 36
Watchdog Timer.......................................................... 38
Brown-Out Protection Circuit .............................................. 27
BSF ..................................................................................... 44
BTFSC ................................................................................ 44
BTFSS ................................................................................ 44
C
C Compilers
MPLAB C18 ................................................................ 54
MPLAB C30 ................................................................ 54
CALL ............................................................................. 19, 45
Carry (C) bit .................................................................... 7, 17
Clocking Scheme ................................................................ 12
CLRF................................................................................... 45
CLRW ................................................................................. 45
CLRWDT............................................................................. 45
Code Protection ............................................................ 37, 39
COMF ................................................................................. 46
Configuration Bits................................................................ 37
Customer Change Notification Service ............................... 83
Customer Notification Service............................................. 83
Customer Support ............................................................... 83
D
DC Characteristics
Commercial................................................................. 62
Extended..................................................................... 61
Industrial ............................................................... 60, 62
DECF .................................................................................. 46
DECFSZ.............................................................................. 46
Development Support ......................................................... 53
Device Reset Timer (DRT).................................................. 27
Digit Carry (DC) bit.......................................................... 7, 17
DRT..................................................................................... 27
E
Electrical Specifications
PIC16F54/57............................................................... 57
PIC16F59.................................................................... 58
Errata .................................................................................... 3
External Power-On Reset Circuit ........................................ 25
F
FSR Register ...................................................................... 20
Value on Reset (PIC16F54)........................................ 24
Value on Reset (PIC16F57)........................................ 24
Value on Reset (PIC16F59)........................................ 24
© 2007 Microchip Technology Inc.
H
High-Performance RISC CPU .............................................. 1
I
I/O Interfacing ..................................................................... 29
I/O Ports ............................................................................. 29
I/O Programming Considerations ....................................... 31
ID Locations.................................................................. 37, 39
INCF ................................................................................... 47
INCFSZ............................................................................... 47
INDF Register ..................................................................... 20
Value on Reset ........................................................... 24
Indirect Data Addressing .................................................... 20
Instruction Cycle ................................................................. 12
Instruction Flow/Pipelining .................................................. 12
Instruction Set Summary .................................................... 41
Internet Address ................................................................. 83
IORLW ................................................................................ 48
IORWF................................................................................ 48
L
Loading of PC ..................................................................... 19
M
MCLR Reset
Register values on...................................................... 24
Memory Map
PIC16F54 ................................................................... 13
PIC16F57/59 .............................................................. 13
Memory Organization ......................................................... 13
Microchip Internet Web Site................................................ 83
MOVF ................................................................................. 48
MOVLW .............................................................................. 48
MOVWF .............................................................................. 49
MPLAB ASM30 Assembler, Linker, Librarian ..................... 54
MPLAB ICD 2 In-Circuit Debugger ..................................... 55
MPLAB ICE 2000 High-Performance Universal
In-Circuit Emulator...................................................... 55
MPLAB Integrated Development Environment Software.... 53
MPLAB PM3 Device Programmer ...................................... 55
MPLAB REAL ICE In-Circuit Emulator System .................. 55
MPLINK Object Linker/MPLIB Object Librarian .................. 54
N
NOP .................................................................................... 49
O
Option ................................................................................. 49
Option Register................................................................... 18
Value on Reset ........................................................... 24
Oscillator Configurations..................................................... 21
Oscillator Types
HS............................................................................... 21
LP ............................................................................... 21
RC .............................................................................. 21
XT ............................................................................... 21
P
PA0 bit ................................................................................ 17
PA1 bit ................................................................................ 17
Paging ................................................................................ 19
PC....................................................................................... 19
Value on Reset ........................................................... 24
DS41213D-page 81
PIC16F5X
PD bit ............................................................................ 17, 23
PICSTART Plus Development Programmer ....................... 56
Pinout Description - PIC16F54.............................................. 9
Pinout Description - PIC16F57............................................ 10
Pinout Description - PIC16F59............................................ 11
PORTA................................................................................ 29
Value on Reset ........................................................... 24
PORTB................................................................................ 29
Value on Reset ........................................................... 24
PORTC................................................................................ 29
Value on Reset ........................................................... 24
PORTD
Value on Reset ........................................................... 24
PORTE
Value on Reset ........................................................... 24
Power-down Mode .............................................................. 39
Power-on Reset (POR) ....................................................... 25
Register values on ...................................................... 24
Prescaler ............................................................................. 35
Program Counter................................................................. 19
Program Memory Organization ........................................... 13
Program Verification/Code Protection................................. 39
Q
Q cycles .............................................................................. 12
R
RC Oscillator ....................................................................... 22
Reader Response ............................................................... 84
Read-Modify-Write .............................................................. 31
Register File Map
PIC16F54 .................................................................... 14
PIC16F57 .................................................................... 14
PIC16F59 .................................................................... 15
Registers
Special Function ......................................................... 16
Value on Reset ........................................................... 24
Reset................................................................................... 23
Reset on Brown-out ............................................................ 27
RETLW................................................................................ 49
RLF ..................................................................................... 50
RRF..................................................................................... 50
T
Timer0
Switching Prescaler Assignment ................................ 36
Timer0 (TMR0) Module............................................... 33
TMR0 register - Value on Reset ................................. 24
TMR0 with External Clock .......................................... 35
Timing Diagrams and Specifications
.................................................................................... 63
Timing Parameter Symbology and Load Conditions
.................................................................................... 63
TO bit ............................................................................ 17, 23
TRIS.................................................................................... 51
TRIS Registers ................................................................... 29
Value on Reset ........................................................... 24
W
W Register
Value on Reset ........................................................... 24
Wake-up from Sleep ..................................................... 23, 39
Watchdog Timer (WDT)................................................ 37, 38
Period ......................................................................... 38
Programming Considerations ..................................... 38
Register Values on Reset ........................................... 24
WWW Address ................................................................... 83
WWW, On-Line Support ....................................................... 3
X
XORLW............................................................................... 52
XORWF .............................................................................. 52
Z
Zero (Z) bit ...................................................................... 7, 17
S
Sleep ....................................................................... 37, 39, 50
Software Simulator (MPLAB SIM)....................................... 54
Special Features of the CPU............................................... 37
Special Function Registers ................................................. 16
Stack ................................................................................... 20
STATUS Register............................................................ 7, 17
Value on Reset ........................................................... 24
SUBWF ............................................................................... 51
SWAPF ............................................................................... 51
DS41213D-page 82
© 2007 Microchip Technology Inc.
PIC16F5X
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://support.microchip.com
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, click on Customer Change
Notification and follow the registration instructions.
© 2007 Microchip Technology Inc.
DS41213D-page 83
PIC16F5X
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 (480) 792-4150.
Please list the following information, and use this outline to provide us with your comments about this document.
To:
Technical Publications Manager
RE:
Reader Response
Total Pages Sent ________
From: Name
Company
Address
City / State / ZIP / Country
Telephone: (_______) _________ - _________
FAX: (______) _________ - _________
Application (optional):
Would you like a reply?
Device: PIC16F5X
Y
N
Literature Number: DS41213D
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?
DS41213D-page 84
© 2007 Microchip Technology Inc.
PIC16F5X
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO.
X
/XX
XXX
Device
Temperature
Range
Package
Pattern
Examples:
a)
b)
c)
Device
PIC16F54
– VDD
PIC16F54T(1) – VDD
PIC16F57
– VDD
PIC16F57T(1) – VDD
range 2.0V to 5.5V
range 2.0V to 5.5V
range 2.0V to 5.5V
range 2.0V to 5.5V
Temperature Range
I
E
= -40°C to +85°C
= -40°C to +125°C
Package
SO
SS
P
SP
SOG
SSG
PG
SPG
=
=
=
=
=
=
=
=
Pattern
d)
e)
PIC16F54–I/P = Industrial temp, PDIP package
PIC16F54T–I/SSG = Industrial temp, SSOP
package (Pb -free), tape and reel
PIC16F57–E/SP6 = Extended temp, Skinny
Plastic DIP package (Pb-free)
PIC16F57T–E/SS = Extended temp, SSOP
package, tape and reel
PIC16F54–I/SOG = Industrial temp, SOIC
package (Pb-free)
(Industrial)
(Extended)
SOIC
SSOP
PDIP
Skinny Plastic DIP (SPDIP)(2)
SOIC (Pb-free)
SOIC (Pb-free)
SOIC (Pb-free)
SOIC (Pb-free)
Note
1:
2:
T = in tape and reel SOIC and SSOP
packages only.
PIC16F57 only
QTP, SQTP, Code or Special Requirements (blank otherwise)
PART NO.
X
/XX
XXX
Device
Temperature
Range
Package
Pattern
Examples:
a)
b)
Device
PIC16F59
– VDD range 2.0V to 5.5V
PIC16F59T(1) – VDD range 2.0V to 5.5V
Temperature Range
I
E
= -40°C to +85°C
= -40°C to +125°C
Package
P
PT
=
=
Pattern
QTP, SQTP, Code or Special Requirements (blank otherwise)
PIC16F59–I/P = Industrial temp, PDIP package
(Pb-free).
PIC16F59T–I/PT = Industrial temp, TQFP
package (Pb-free), tape and reel.
(Industrial)
(Extended)
PDIP
TQFP
Note
© 2007 Microchip Technology Inc.
1:
T = in tape and reel TQFP packages only.
DS41213D-page 85
WORLDWIDE SALES AND SERVICE
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
Corporate Office
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http://support.microchip.com
Web Address:
www.microchip.com
Asia Pacific Office
Suites 3707-14, 37th Floor
Tower 6, The Gateway
Habour City, Kowloon
Hong Kong
Tel: 852-2401-1200
Fax: 852-2401-3431
India - Bangalore
Tel: 91-80-4182-8400
Fax: 91-80-4182-8422
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 - Yokohama
Tel: 81-45-471- 6166
Fax: 81-45-471-6122
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
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
Detroit
Farmington Hills, MI
Tel: 248-538-2250
Fax: 248-538-2260
Kokomo
Kokomo, IN
Tel: 765-864-8360
Fax: 765-864-8387
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: 86-10-8528-2100
Fax: 86-10-8528-2104
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
Korea - Gumi
Tel: 82-54-473-4301
Fax: 82-54-473-4302
China - Fuzhou
Tel: 86-591-8750-3506
Fax: 86-591-8750-3521
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
China - Hong Kong SAR
Tel: 852-2401-1200
Fax: 852-2401-3431
Malaysia - Penang
Tel: 60-4-646-8870
Fax: 60-4-646-5086
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: 886-3-572-9526
Fax: 886-3-572-6459
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
Taiwan - Kaohsiung
Tel: 886-7-536-4818
Fax: 886-7-536-4803
China - Shunde
Tel: 86-757-2839-5507
Fax: 86-757-2839-5571
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
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 - Xian
Tel: 86-29-8833-7250
Fax: 86-29-8833-7256
12/08/06
DS41213D-page 86
© 2007 Microchip Technology Inc.