STMICROELECTRONICS ST10F269-T3

ST10F269-T3
16-BIT MCU WITH MAC UNIT, 256K BYTE FLASH MEMORY AND 12K BYTE RAM
March 2003
FAIL-SAFE PROTECTION
– PROGRAMMABLE WATCHDOG TIMER
– OSCILLATOR WATCHDOG
■
■
ON-CHIP BOOTSTRAP LOADER
CLOCK GENERATION
– ON-CHIP PLL
– DIRECT OR PRESCALED CLOCK INPUT
■
■
REAL TIME CLOCK
UP TO 111 GENERAL PURPOSE I/O LINES
– INDIVIDUALLY PROGRAMMABLE
OUTPUT OR SPECIAL FUNCTION
AS
INPUT,
– PROGRAMMABLE THRESHOLD (HYSTERESIS)
■
■
IDLE AND POWER DOWN MODES
■
■
TEMPERATURE RANGE: -40 + 125°C
SINGLE VOLTAGE SUPPLY: 5V ±10% (EMBEDDED
REGULATOR FOR 2.7V CORE SUPPLY).
144-PIN TQFP PACKAGE
16
32
256K Byte
Flash Memory
2K Byte
Internal
RAM
16
CPU-Core and MAC Unit
Watchdog
16
PEC
CAN1_RXD
CAN1_TXD
CAN1
CAN2_RXD
CAN2_TXD
CAN2
Oscillator
and PLL
16
Interrupt Controller
XTAL1
8
Port 6
8
Port 5
16
BRG
BRG
Port 3
Port 7
15
8
XTAL2
Voltage
Regulator
CAPCOM1
16
PWM
16
CAPCOM2
2.7V
Port 2
10K Byte
XRAM
SSC
■
■
■
ASC usart
■
TWO CAN 2.0B INTERFACES OPERATING ON ONE
OR TWO CAN BUSSES (30 OR 2x15 MESSAGE
OBJECTS)
GPT1
■
■
GPT2
■
ORDER CODE: ST10F269-T3
10-Bit ADC
■
TQFP144 (20 x 20 x 1.40 mm)
(Thin Quad Flat Pack)
External Bus
Controller
■
HIGH PERFORMANCE 32MHz CPU WITH DSP
FUNCTION
– 16-BIT CPU WITH 4-STAGE PIPELINE
– 62.5ns INSTRUCTION CYCLE TIME AT 32MHz
MAX CPU CLOCK
– MULTIPLY/ACCUMULATE UNIT (MAC) 16 x 16-BIT
MULTIPLICATION, 40-BIT ACCUMULATOR
– REPEAT UNIT
– ENHANCED BOOLEAN BIT MANIPULATION FACILITIES
– ADDITIONAL INSTRUCTIONS TO SUPPORT HLL
AND OPERATING SYSTEMS
– SINGLE-CYCLE CONTEXT SWITCHING SUPPORT
MEMORY ORGANIZATION
– 256K BYTE ON-CHIP FLASH MEMORY SINGLE
VOLTAGE WITH ERASE/PROGRAM CONTROLLER.
– 100K ERASING/PROGRAMMING CYCLES.
– UP TO 16M BYTE LINEAR ADDRESS SPACE FOR
CODE AND DATA (5M BYTES WITH CAN)
– 2K BYTE ON-CHIP INTERNAL RAM (IRAM)
– 10K BYTE ON-CHIP EXTENSION RAM (XRAM)
FAST AND FLEXIBLE BUS
– PROGRAMMABLE EXTERNAL BUS CHARACTERISTICS FOR DIFFERENT ADDRESS RANGES
– 8-BIT OR 16-BIT EXTERNAL DATA BUS
– MULTIPLEXED OR DEMULTIPLEXED EXTERNAL
ADDRESS/DATA BUSES
– FIVE PROGRAMMABLE CHIP-SELECT SIGNALS
– HOLD-ACKNOWLEDGE BUS ARBITRATION SUPPORT
INTERRUPT
– 8-CHANNEL PERIPHERAL EVENT CONTROLLER
FOR SINGLE CYCLE INTERRUPT DRIVEN DATA
TRANSFER
– 16-PRIORITY-LEVEL INTERRUPT SYSTEM WITH
56 SOURCES, SAMPLING RATE DOWN TO
31.25ns
TIMERS
– TWO MULTI-FUNCTIONAL GENERAL PURPOSE
TIMER UNITS WITH 5 TIMERS
– TWO 16-CHANNEL CAPTURE / COMPARE UNITS
A/D CONVERTER
– 16-CHANNEL 10-BIT
– 6.06µs CONVERSION TIME AT 32MHz CPU CLOCK
4-CHANNEL PWM UNIT
SERIAL CHANNELS
– SYNCHRONOUS / ASYNCHRONOUS SERIAL
CHANNEL
– HIGH-SPEED SYNCHRONOUS CHANNEL
Port 4 Port 1 Port 0
■
16
Port 8
8
1/160
ST10F269-T3
TABLE OF CONTENTS
PAGE
1-
INTRODUCTION ........................................................................................................
6
2-
PIN DATA ...................................................................................................................
7
3-
FUNCTIONAL DESCRIPTION ...................................................................................
13
4-
MEMORY ORGANIZATION .......................................................................................
14
5-
INTERNAL FLASH MEMORY ...................................................................................
17
5.1 -
OVERVIEW ................................................................................................................
17
5.2 -
OPERATIONAL OVERVIEW ......................................................................................
17
5.3 -
ARCHITECTURAL DESCRIPTION ............................................................................
19
5.3.1 5.3.2 5.3.3 5.3.4 5.3.5 5.3.6 5.3.7 -
Read Mode .................................................................................................................
Command Mode .........................................................................................................
Ready/Busy Signal .....................................................................................................
Flash Status Register .................................................................................................
Flash Protection Register ...........................................................................................
Instructions Description ..............................................................................................
Reset Processing and Initial State ..............................................................................
19
19
19
19
21
21
25
5.4 -
FLASH MEMORY CONFIGURATION ........................................................................
25
5.5 -
APPLICATION EXAMPLES .......................................................................................
25
5.5.1 5.5.2 5.5.3 -
Handling of Flash Addresses ......................................................................................
Basic Flash Access Control ........................................................................................
Programming Examples .............................................................................................
25
26
27
5.6 -
BOOTSTRAP LOADER ............................................................................................
30
5.6.1 5.6.2 5.6.3 5.6.4 5.6.5 -
Entering the Bootstrap Loader ....................................................................................
Memory Configuration After Reset .............................................................................
Loading the Startup Code ...........................................................................................
Exiting Bootstrap Loader Mode ..................................................................................
Choosing the Baud Rate for the BSL .........................................................................
30
31
32
32
33
6-
CENTRAL PROCESSING UNIT (CPU) .....................................................................
34
6.1 -
MULTIPLIER-ACCUMULATOR UNIT (MAC) .............................................................
35
6.1.1 6.1.1.1 6.1.1.2 6.1.1.3 -
Features .....................................................................................................................
Enhanced Addressing Capabilities ..............................................................................
Multiply-Accumulate Unit .............................................................................................
Program Control ..........................................................................................................
36
36
36
36
6.2 -
INSTRUCTION SET SUMMARY ................................................................................
37
6.3 -
MAC COPROCESSOR SPECIFIC INSTRUCTIONS .................................................
38
7-
EXTERNAL BUS CONTROLLER ..............................................................................
42
7.1 -
PROGRAMMABLE CHIP SELECT TIMING CONTROL ............................................
42
7.2 -
READY PROGRAMMABLE POLARITY .....................................................................
42
2/160
ST10F269-T3
TABLE OF CONTENTS
PAGE
8-
INTERRUPT SYSTEM ...............................................................................................
44
8.1 -
EXTERNAL INTERRUPTS .........................................................................................
44
8.2 -
INTERRUPT REGISTERS AND VECTORS LOCATION LIST ..................................
45
8.3 -
INTERRUPT CONTROL REGISTERS .......................................................................
46
8.4 -
EXCEPTION AND ERROR TRAPS LIST ...................................................................
47
9-
CAPTURE/COMPARE (CAPCOM) UNITS ................................................................
48
10 -
GENERAL PURPOSE TIMER UNIT ..........................................................................
51
10.1 -
GPT1 .................................................................................................................... ......
51
10.2 -
GPT2 ..........................................................................................................................
52
11 -
PWM MODULE ..........................................................................................................
54
12 -
PARALLEL PORTS ...................................................................................................
55
12.1 -
INTRODUCTION ........................................................................................................
55
12.2 -
I/O’S SPECIAL FEATURES .......................................................................................
57
12.2.1 12.2.2 12.2.3 12.2.4 -
Open Drain Mode .......................................................................................................
Input Threshold Control ............................................................................................
Output Driver Control ................................................................................................
Alternate Port Functions .............................................................................................
57
57
58
60
12.3 -
PORT0 ........................................................................................................................
61
12.3.1 -
Alternate Functions of PORT0 ....................................................................................
62
12.4 -
PORT1 ........................................................................................................................
64
12.4.1 -
Alternate Functions of PORT1 ....................................................................................
64
12.5 -
PORT 2 .......................................................................................................................
66
12.5.1 -
Alternate Functions of Port 2 ......................................................................................
66
12.6 -
PORT 3 .......................................................................................................................
69
12.6.1 -
Alternate Functions of Port 3 ......................................................................................
70
12.7 -
PORT 4 .......................................................................................................................
73
12.7.1 -
Alternate Functions of Port 4 ......................................................................................
74
12.8 -
PORT 5 .......................................................................................................................
77
12.8.1 12.8.2 -
Alternate Functions of Port 5 ......................................................................................
Port 5 Schmitt Trigger Analog Inputs ..........................................................................
78
79
12.9 -
PORT 6 .......................................................................................................................
79
12.9.1 -
Alternate Functions of Port 6 ......................................................................................
80
12.10 -
PORT 7 .......................................................................................................................
83
12.10.1 -
Alternate Functions of Port 7 ......................................................................................
84
12.11 -
PORT 8 .......................................................................................................................
87
12.11.1 -
Alternate Functions of Port 8 ......................................................................................
88
3/160
ST10F269-T3
TABLE OF CONTENTS
PAGE
13 -
A/D CONVERTER ......................................................................................................
90
14 -
SERIAL CHANNELS .................................................................................................
91
14.1 -
ASYNCHRONOUS / SYNCHRONOUS SERIAL INTERFACE (ASCO) .....................
91
14.1.1 14.1.2 -
ASCO in Asynchronous Mode ....................................................................................
ASCO in Synchronous Mode ......................................................................................
91
93
14.2 -
HIGH SPEED SYNCHRONOUS SERIAL CHANNEL (SSC) .....................................
95
15 -
CAN MODULES .........................................................................................................
97
15.1 -
CAN MODULES MEMORY MAPPING ......................................................................
97
15.1.1 15.1.2 -
CAN1 .................................................................................................................. ........
CAN2 .................................................................................................................. ........
97
97
15.2 -
CAN BUS CONFIGURATIONS ..................................................................................
97
16 -
REAL TIME CLOCK ..................................................................................................
99
16.1 -
RTC REGISTERS ......................................................................................................
100
16.1.1 16.1.2 16.1.3 16.1.4 16.1.5 -
RTCCON: RTC Control Register ................................................................................
RTCPH & RTCPL: RTC PRESCALER Registers .......................................................
RTCDH & RTCDL: RTC DIVIDER Counters ..............................................................
RTCH & RTCL: RTC Programmable COUNTER Registers .......................................
RTCAH & RTCAL: RTC ALARM Registers ................................................................
100
101
101
102
103
16.2 -
PROGRAMMING THE RTC .......................................................................................
103
17 -
WATCHDOG TIMER ..................................................................................................
105
18 -
SYSTEM RESET ........................................................................................................
107
18.1 -
LONG HARDWARE RESET ......................................................................................
107
18.1.1 18.1.2 18.1.3 -
Asynchronous Reset ..................................................................................................
Synchronous Reset (RSTIN pulse > 1040TCL and RPD pin at high level) ................
Exit of Long Hardware Reset ......................................................................................
10 7
108
109
18.2 -
SHORT HARDWARE RESET ....................................................................................
109
18.3 -
SOFTWARE RESET ..................................................................................................
110
18.4 -
WATCHDOG TIMER RESET .....................................................................................
110
18.5 -
RSTOUT, RSTIN, BIDIRECTIONAL RESET .............................................................
111
18.5.1 18.5.2 18.5.3 -
RSTOUT Pin ...............................................................................................................
Bidirectional Reset ......................................................................................................
RSTIN pin ...................................................................................................................
111
111
111
18.6 -
RESET CIRCUITRY ...................................................................................................
111
19 -
POWER REDUCTION MODES .................................................................................
114
19.1 -
IDLE MODE ................................................................................................................
114
19.2 -
POWER DOWN MODE ..............................................................................................
114
4/160
ST10F269-T3
TABLE OF CONTENTS
PAGE
19.2.1 19.2.2 -
Protected Power Down Mode .....................................................................................
Interruptible Power Down Mode .................................................................................
114
114
20 -
SPECIAL FUNCTION REGISTER OVERVIEW .........................................................
117
20.1 -
IDENTIFICATION REGISTERS .................................................................................
123
20.2 -
SYSTEM CONFIGURATION REGISTERS ................................................................
124
21 -
ELECTRICAL CHARACTERISTICS .........................................................................
131
21.1 -
ABSOLUTE MAXIMUM RATINGS .............................................................................
131
21.2 -
PARAMETER INTERPRETATION .............................................................................
131
21.3 -
DC CHARACTERISTICS ...........................................................................................
131
21.3.1 21.3.2 -
A/D Converter Characteristics ....................................................................................
Conversion Timing Control .......................................................................................
134
135
21.4 -
AC CHARACTERISTICS ............................................................................................
136
21.4.1 21.4.2 21.4.3 21.4.4 21.4.5 21.4.6 21.4.7 21.4.8 21.4.9 21.4.10 21.4.11 21.4.12 21.4.13 21.4.14 21.4.14.1
21.4.14.2
Test Waveforms .......................................................................................................
Definition of Internal Timing ........................................................................................
Clock Generation Modes ............................................................................................
Prescaler Operation ....................................................................................................
Direct Drive .................................................................................................................
Oscillator Watchdog (OWD) .......................................................................................
Phase Locked Loop ....................................................................................................
External Clock Drive XTAL1 .......................................................................................
Memory Cycle Variables .............................................................................................
Multiplexed Bus ..........................................................................................................
Demultiplexed Bus ......................................................................................................
CLKOUT and READY .................................................................................................
External Bus Arbitration ..............................................................................................
High-Speed Synchronous Serial Interface (SSC) Timing ...........................................
Master Mode................................................................................................................
Slave mode..................................................................................................................
136
136
137
138
138
138
138
139
140
141
147
153
155
157
157
158
22 -
PACKAGE MECHANICAL DATA
...........................................................................
159
23 -
ORDERING INFORMATION ......................................................................................
159
5/160
ST10F269-T3
1 - INTRODUCTION
The ST10F269-T3 is a derivative of the
STMicroelectronics ST10 family of 16-bit
single-chip CMOS microcontrollers. It combines
high CPU performance (up to 20 million
instructions per second) with high peripheral
functionality and enhanced I/O-capabilities. It also
provides on-chip high-speed single voltage Flash
memory, on-chip high-speed RAM, and clock
generation via PLL.
ST10F269-T3 is processed in 0.35µm CMOS
technology. The MCU core and the logic is
supplied with a 5V to 2.7V on chip voltage
regulator. The part is supplied with a single 5V
supply and I/Os work at 5V.
The device is upward compatible with the
ST10F168 device, with the following set of
differences:
– The Multiply/Accumulate unit is available as
standard. This MAC unit adds powerful DSP
functions to the ST10 architecture, but maintains
full compatibility for existing code.
– Flash control interface is now based on
STMicroelectronics
third
generation
of
stand-alone Flash memories, with an embedded
Erase/Program Controller. This completely
–
–
–
–
–
–
–
frees up the CPU during programming or
erasing the Flash.
Two dedicated pins (DC1 and DC2) on the
TPQFP-144 package are used for decoupling
the internally generated 2.7V core logic supply.
Do not connect these two pins to 5.0V
external supply. Instead, these pins should be
connected to a decoupling capacitor (ceramic
type, value ≥ 330 nF).
The A/D Converter characteristics are different
from previous ST10 derivatives ones. Refer to
Section 21.3.1 - A/D Converter Characteristics.
The AC and DC parameters are adapted to the
32MHz maximum CPU frequency. The
characterization is performed with CL = 50pF
max on output pins. Refer to Section 21.3 DC
Characteristics.
In order to reduce EMC, the rise/fall time and the
sink/source capability of the drivers of the I/O
pads are programmable. Refer to Section 12.2 I/
O’s Special Features.
The Real Time Clock functionality is added.
The external interrupt sources can be selected
with the EXISEL register.
The reset source is identified by a dedicated
status bit in the WDTCON register.
Figure 1 : Logic Symbol
VDD DC1 DC2
XTAL1
XTAL2
Port 0
16-bit
RSTIN
Port 1
16-bit
RSTOUT
RPD
VAREF
Port 2
16-bit
VAGND
NMI
EA
READY
ALE
RD
WR/WRL
Port 5
16-bit
6/160
VSS
ST10F269
Port 3
15-bit
Port 4
8-bit
Port 6
8-bit
Port 7
8-bit
Port 8
8-bit
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
P6.0/CS0
P6.1/CS1
P6.2/CS2
P6.3/CS3
P6.4/CS4
P6.5/HOLD
P6.6/HLDA
P6.7/BREQ
P8.0/CC16IO
P8.1/CC17IO
P8.2/CC18IO
P8.3/CC19IO
P8.4/CC20IO
P8.5/CC21IO
P8.6/CC22IO
P8.7/CC23IO
DC2
VSS
P7.0/POUT0
P7.1/POUT1
P7.2/POUT2
P7.3/POUT3
P7.4/CC28I0
P7.5/CC29I0
P7.6/CC30I0
P7.7/CC31I0
P5.0/AN0
P5.1/AN1
P5.2/AN2
P5.3/AN3
P5.4/AN4
P5.5/AN5
P5.6/AN6
P5.7/AN7
P5.8/AN8
P5.9/AN9
VAREF
VAGND
P5.10/AN10/T6EUD
P5.11/AN11/T5EUD
P5.12/AN12/T6IN
P5.13/AN13/T5IN
P5.14/AN14/T4EUD
P5.15/AN15/T2EUD
VSS
VDD
P2.0/CC0IO
P2.1/CC1IO
P2.2/CC2IO
P2.3/CC3IO
P2.4/CC4IO
P2.5/CC5IO
P2.6/CC6IO
P2.7/CC7IO
VSS
DC1
P2.8/CC8IO/EX0IN
P2.9/CC9IO/EX1IN
P2.10/CC10IOEX2IN
P2.11/CC11IOEX3IN
P2.12/CC12IO/EX4IN
P2.13/CC13IO/EX5IN
P2.14/CC14IO/EX6IN
P2.15/CC15IO/EX7IN/T7IN
P3.0/T0IN
P3.1/T6OUT
P3.2/CAPIN
P3.3/T3OUT
P3.4/T3EUD
P3.5/T4IN
VSS
VDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
144
143
142
141
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
125
124
123
122
121
120
119
118
117
116
115
114
113
112
111
110
109
VDD
VSS
NMI
RSTOUT
RSTIN
VSS
XTAL1
XTAL2
VDD
P1H.7/A15/CC27IO
P1H.6/A14/CC26IO
P1H.5/A13/CC25IO
P1H.4/A12/CC24IO
P1H.3/A11
P1H.2/A10
P1H.1/A9
P1H.0/A8
VSS
VDD
P1L.7/A7
P1L.6/A6
P1L.5/A5
P1L.4/A4
P1L.3/A3
P1L.2/A2
P1L.1/A1
P1L.0/A0
P0H.7/AD15
P0H.6/AD14
P0H.5/AD13
P0H.4/AD12
P0H.3/AD11
P0H.2/AD10
P0H.1/AD9
VSS
VDD
ST10F269-T3
2 - PIN DATA
Figure 2 : Pin Configuration (top view)
ST10F269-T3
108
107
106
105
104
103
102
101
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
73
P0H.0/AD8
P0L.7/AD7
P0L.6/AD6
P0L.5/AD5
P0L.4/AD4
P0L.3/AD3
P0L.2AD2
P0L.A/AD1
P0L.0/AD0
EA
ALE
READY
WR/WRL
RD
V SS
V DD
P4.7A23/CAN2_TxD
P4.6A22/CAN1_TxD
P4.5A21/CAN1_RxD
P4.4A20/CAN2_RxD
P4.3/A19
P4.2/A18
P4.1/A17
P4.0/A16
RPD
V SS
V DD
P3.15/CLKOUT
P3.13/SCLK
P3.12/BHE/WRH
P3.11/RXD0
P3.10/TXD0
P3.9/MTSR
P3.8/MRST
P3.7/T2IN
P3.6/T3IN
7/160
ST10F269-T3
Table 1 : Pin Description
Symbol
Pin
Type
Function
P6.0 - P6.7
1-8
I/O
8-bit bidirectional I/O port, bit-wise programmable for input or output via direction
bit. Programming an I/O pin as input forces the corresponding output driver to high
impedance state. Port 6 outputs can be configured as push-pull or open drain
drivers. The following Port 6 pins have alternate functions:
1
O
P6.0
CS0
Chip Select 0 Output
...
...
...
...
...
5
O
P6.4
CS4
Chip Select 4 Output
6
I
P6.5
HOLD
External Master Hold Request Input
7
O
P6.6
HLDA
Hold Acknowledge Output
8
O
P6.7
BREQ
Bus Request Output
9-16
I/O
8-bit bidirectional I/O port, bit-wise programmable for input or output via direction
bit. Programming an I/O pin as input forces the corresponding output driver to high
impedance state. Port 8 outputs can be configured as push-pull or open drain
drivers. The input threshold of Port 8 is selectable (TTL or special).
The following Port 8 pins have alternate functions:
9
I/O
P8.0
CC16IO
CAPCOM2: CC16 Capture Input / Compare Output
...
...
...
...
...
16
I/O
P8.7
CC23IO
CAPCOM2: CC23 Capture Input / Compare Output
19-26
I/O
8-bit bidirectional I/O port, bit-wise programmable for input or output via direction
bit. Programming an I/O pin as input forces the corresponding output driver to high
impedance state. Port 7 outputs can be configured as push-pull or open drain
drivers. The input threshold of Port 7 is selectable (TTL or special).
The following Port 7 pins have alternate functions:
19
O
P7.0
POUT0
PWM Channel 0 Output
...
...
...
...
...
22
O
P7.3
POUT3
PWM Channel 3 Output
23
I/O
P7.4
CC28IO
CAPCOM2: CC28 Capture Input / Compare Output
...
...
...
...
...
26
I/O
P7.7
CC31IO
CAPCOM2: CC31 Capture Input / Compare Output
27-36
39-44
I
I
16-bit input-only port with Schmitt-Trigger characteristics. The pins of Port 5 can be
the analog input channels (up to 16) for the A/D converter, where P5.x equals ANx
(Analog input channel x), or they are timer inputs:
39
I
P5.10
T6EUD
GPT2 Timer T6 External Up / Down Control Input
40
I
P5.11
T5EUD
GPT2 Timer T5 External Up / Down Control Input
41
I
P5.12
T6IN
GPT2 Timer T6 Count Input
42
I
P5.13
T5IN
GPT2 Timer T5 Count Input
43
I
P5.14
T4EUD
GPT1 Timer T4 External Up / Down Control Input
44
I
P5.15
T2EUD
GPT1 Timer T2 External Up / Down Control Input
P8.0 - P8.7
P7.0 - P7.7
P5.0 - P5.9
P5.10 - P5.15
8/160
ST10F269-T3
Symbol
Pin
Type
Function
P2.0 - P2.7
P2.8 - P2.15
47-54
57-64
I/O
16-bit bidirectional I/O port, bit-wise programmable for input or output via direction
bit. Programming an I/O pin as input forces the corresponding output driver to high
impedance state. Port 2 outputs can be configured as push-pull or open drain
drivers. The input threshold of Port 2 is selectable (TTL or special).
The following Port 2 pins have alternate functions:
47
I/O
P2.0
CC0IO
CAPCOM: CC0 Capture Input / Compare Output
...
...
...
...
...
54
I/O
P2.7
CC7IO
CAPCOM: CC7 Capture Input / Compare Output
57
I/O
P2.8
CC8IO
CAPCOM: CC8 Capture Input / Compare Output
EX0IN
Fast External Interrupt 0 Input
I
P3.0 - P3.5
P3.6 - P3.13,
P3.15
...
...
...
...
...
64
I/O
P2.15
CC15IO
CAPCOM: CC15 Capture Input / Compare Output
I
EX7IN
Fast External Interrupt 7 Input
I
T7IN
CAPCOM2 Timer T7 Count Input
65-70,
73-80,
81
I/O
I/O
I/O
65
I
P3.0
T0IN
CAPCOM Timer T0 Count Input
66
O
P3.1
T6OUT
GPT2 Timer T6 Toggle Latch Output
67
I
P3.2
CAPIN
GPT2 Register CAPREL Capture Input
68
O
P3.3
T3OUT
GPT1 Timer T3 Toggle Latch Output
69
I
P3.4
T3EUD
GPT1 Timer T3 External Up / Down Control Input
70
I
P3.5
T4IN
GPT1 Timer T4 Input for Count / Gate / Reload / Capture
73
I
P3.6
T3IN
GPT1 Timer T3 Count / Gate Input
74
I
P3.7
T2IN
GPT1 Timer T2 Input for Count / Gate / Reload / Capture
75
I/O
P3.8
MRST
SSC Master-Receiver / Slave-Transmitter I/O
76
I/O
P3.9
MTSR
SSC Master-Transmitter / Slave-Receiver O/I
77
O
P3.10
TxD0
ASC0 Clock / Data Output (Asynchronous /
Synchronous)
78
I/O
P3.11
RxD0
ASC0 Data Input (Asynchronous) or I/O (Synchronous)
79
O
P3.12
BHE
External Memory High Byte Enable Signal
WRH
External Memory High Byte Write Strobe
15-bit (P3.14 is missing) bidirectional I/O port, bit-wise programmable for input or
output via direction bit. Programming an I/O pin as input forces the corresponding
output driver to high impedance state. Port 3 outputs can be configured as push-pull
or open drain drivers. The input threshold of Port 3 is selectable (TTL or special).
The following Port 3 pins have alternate functions:
80
I/O
P3.13
SCLK
SSC Master Clock Output / Slave Clock Input
81
O
P3.15
CLKOUT
System Clock Output (=CPU Clock)
9/160
ST10F269-T3
Symbol
P4.0 –P4.7
Pin
Type
Function
85-92
I/O
Port 4 is an 8-bit bidirectional I/O port. It is bit-wise programmable for input or output
via direction bit. Programming an I/O pin as input forces the corresponding output
driver to high impedance state. The input threshold is selectable (TTL or special).
Port 4.6 & 4.7 outputs can be configured as push-pull or open drain drivers.
In case of an external bus configuration, Port 4 can be used to output the segment
address lines:
85
O
P4.0
A16
Segment Address Line
86
O
P4.1
A17
Segment Address Line
87
O
P4.2
A18
Segment Address Line
88
O
P4.3
A19
Segment Address Line
89
O
P4.4
A20
Segment Address Line
CAN2_RxD
CAN2 Receive Data Input
A21
Segment Address Line
CAN1_RxD
CAN1 Receive Data Input
A22
Segment Address Line
CAN1_TxD
CAN1 Transmit Data Output
A23
Most Significant Segment Address Line
CAN2_TxD
CAN2 Transmit Data Output
I
90
O
P4.5
I
91
O
P4.6
O
92
O
O
P4.7
RD
95
O
External Memory Read Strobe. RD is activated for every external instruction or data
read access.
WR/WRL
96
O
External Memory Write Strobe. In WR-mode this pin is activated for every external
data write access. In WRL mode this pin is activated for low Byte data write
accesses on a 16-bit bus, and for every data write access on an 8-bit bus. See
WRCFG in the SYSCON register for mode selection.
READY/
READY
97
I
Ready Input. The active level is programmable. When the Ready function is
enabled, the selected inactive level at this pin, during an external memory access,
will force the insertion of waitstate cycles until the pin returns to the selected active
level.
ALE
98
O
Address Latch Enable Output. In case of use of external addressing or of multiplexed mode, this signal is the latch command of the address lines.
EA
99
I
External Access Enable pin. A low level applied to this pin during and after Reset
forces the ST10F269-T3 to start the program from the external memory space. A
high level forces the MCU to start in the internal memory space.
10/160
ST10F269-T3
Symbol
Pin
P0L.0 - P0L.7, 100-107,
P0H.0
108,
P0H.1 - P0H.7 111-117
Type
Function
I/O
Two 8-bit bidirectional I/O ports P0L and P0H, bit-wise programmable for input or
output via direction bit. Programming an I/O pin as input forces the corresponding
output driver to high impedance state.
In case of an external bus configuration, PORT0 serves as the address (A) and as
the address / data (AD) bus in multiplexed bus modes and as the data (D) bus in
demultiplexed bus modes.
Demultiplexed bus modes
Data Path Width:
P0L.0 – P0L.7:
P0H.0 – P0H.7
8-bit
D0 – D7
I/O
16-bit
D0 - D7
D8 - D15
Multiplexed bus modes
Data Path Width:
P0L.0 – P0L.7:
P0H.0 – P0H.7
P1L.0 - P1L.7
P1H.0 - P1H.7
8-bit
16-bit
AD0 – AD7 AD0 - AD7
A8 – A15
AD8 - AD15
118-125
128-135
I/O
Two 8-bit bidirectional I/O ports P1L and P1H, bit-wise programmable for input or
output via direction bit. Programming an I/O pin as input forces the corresponding
output driver to high impedance state. PORT1 is used as the 16-bit address bus (A)
in demultiplexed bus modes and also after switching from a demultiplexed bus mode
to a multiplexed bus mode.
The following PORT1 pins have alternate functions:
132
I
P1H.4
CC24IO
CAPCOM2: CC24 Capture Input
133
I
P1H.5
CC25IO
CAPCOM2: CC25 Capture Input
134
I
P1H.6
CC26IO
CAPCOM2: CC26 Capture Input
135
I
P1H.7
CC27IO
CAPCOM2: CC27 Capture Input
XTAL1
138
I
XTAL1
Oscillator amplifier and/or external clock input.
XTAL2
137
O
XTAL2
Oscillator amplifier circuit output.
To clock the device from an external source, drive XTAL1 while leaving XTAL2
unconnected. Minimum and maximum high / low and rise / fall times specified in the
AC Characteristics must be observed.
RSTIN
140
I
Reset Input with Schmitt-Trigger characteristics. A low level at this pin for a specified
duration while the oscillator is running resets the ST10F269-T3. An internal pull-up
resistor permits power-on reset using only a capacitor connected to VSS. In bidirectional reset mode (enabled by setting bit BDRSTEN in SYSCON register), the
RSTIN line is pulled low for the duration of the internal reset sequence.
RSTOUT
141
O
Internal Reset Indication Output. This pin is driven to a low level during hardware,
software or watchdog timer reset. RSTOUT remains low until the EINIT (end of initialization) instruction is executed.
NMI
142
I
Non-Maskable Interrupt Input. A high to low transition at this pin causes the CPU to
vector to the NMI trap routine. If bit PWDCFG = ‘0’ in SYSCON register, when the
PWRDN (power down) instruction is executed, the NMI pin must be low in order to
force the ST10F269-T3 to go into power down mode. If NMI is high and PWDCFG
=’0’, when PWRDN is executed, the part will continue to run in normal mode.
If not used, pin NMI should be pulled high externally.
VAREF
37
-
A/D converter reference voltage.
VAGND
38
-
A/D converter reference ground.
RPD
84
-
Timing pin for the return from interruptible powerdown mode and synchronous /
asynchronous reset selection.
11/160
ST10F269-T3
Symbol
Pin
Type
VDD
46, 72,
82,93,
109,
126,
136, 144
-
Digital Supply Voltage:
= + 5V during normal operation and idle mode.
VSS
18,45,
55,71,
83,94,
110,
127,
139, 143
-
Digital Ground.
DC1
DC2
56
17
-
2.7V Decoupling pin: a decoupling capacitor of ≥ 330 nF must be connected
between this pin and nearest VSS pin.
12/160
Function
ST10F269-T3
3 - FUNCTIONAL DESCRIPTION
The architecture of the ST10F269-T3 combines
advantages of both RISC and CISC processors
and an advanced peripheral subsystem. The
block diagram gives an overview of the different
on-chip components and the high bandwidth
internal bus structure of the ST10F269-T3.
Figure 3 : Block Diagram
32
16
256K Byte
Flash Memory
2K Byte
Internal
RAM
16
CPU-Core and MAC Unit
Watchdog
16
PEC
10K Byte
XRAM
Interrupt Controller
16
2.7V
8
Port 6
8
Port 5
16
BRG
Port 2
CAPCOM1
CAPCOM2
PWM
SSC
ASC usart
GPT1
GPT2
16
10-Bit ADC
16
XTAL2
Voltage
Regulator
CAN2
External Bus
Controller
P4.4 CAN2_RXD
P4.7 CAN2_TXD
XTAL1
CAN1
Port 4 Port 1 Port 0
P4.5 CAN1_RXD
P4.6 CAN1_TXD
Oscillator
and PLL
16
BRG
Port 7
Port 3
15
8
Port 8
8
13/160
ST10F269-T3
4 - MEMORY ORGANIZATION
The memory space of the ST10F269-T3 is
configured in a unified memory architecture. Code
memory, data memory, registers and I/O ports are
organized within the same linear address space of
16M Bytes. The entire memory space can be
accessed Byte wise or Word wise. Particular
portions of the on-chip memory have additionally
been made directly bit addressable.
Flash: 256K Bytes of on-chip Flash memory.
IRAM: 2K Bytes of on-chip internal RAM
(dual-port) is provided as a storage for data,
system stack, general purpose register banks and
code. A register bank is 16 Wordwide (R0 to R15)
and / or Bytewide (RL0, RH0, …, RL7, RH7)
general purpose registers.
XRAM: 10K Bytes of on-chip extension RAM
(single port XRAM) is provided as a storage for
data, user stack and code.
The XRAM is divided into 2 areas, the first 2K
Bytes named XRAM1 and the second 8K Bytes
named XRAM2, connected to the internal XBUS
and are accessed like an external memory in
16-bit demultiplexed bus-mode without wait state
or read/write delay (62.5ns access at 32MHz CPU
clock). Byte and Word accesses are allowed.
The XRAM1 address range is 00’E000h
- 00’E7FFh if XPEN (bit 2 of SYSCON register),
and XRAM1EN (bit 2 of XPERCON register) are
set. If XRAM1EN or XPEN is cleared, then any
access in the address range 00’E000h - 00’E7FFh
will be directed to external memory interface,
using the BUSCONx register corresponding to
address matching ADDRSELx register
The XRAM2 address range is 00’C000h
- 00’DFFFh if XPEN (bit 2 of SYSCON register),
and XRAM2 (bit 3 of XPERCON register are set).
If bit XRAM2EN or XPEN is cleared, then any
access in the address range 00’C000h
- 00’DFFFh will be directed to external memory
interface,
using
the
BUSCONx
register
corresponding to address matching ADDRSELx
register.
As the XRAM appears like external memory, it
cannot be used as system stack or as register
banks. The XRAM is not provided for single bit
storage and therefore is not bit addressable.
14/160
SFR/ESFR: 1024 Bytes (2 x 512 Bytes) of
address space is reserved for the special function
register areas. SFRs are Wordwide registers
which are used to control and to monitor the
function of the different on-chip units.
CAN1: Address range 00’EF00h - 00’EFFFh is
reserved for the CAN1 Module access. The CAN1
is enabled by setting XPEN bit 2 of the SYSCON
register and by setting CAN1EN bit 0 of the new
XPERCON register. Accesses to the CAN Module
use demultiplexed addresses and a 16-bit data
bus (Byte accesses are possible). Two wait states
give an access time of 125ns at 32MHz CPU
clock. No tri-state wait states are used.
CAN2: Address range 00’EE00h - 00’EEFFh is
reserved for the CAN2 Module access. The CAN2
is enabled by setting XPEN bit 2 of the SYSCON
register and by setting CAN2EN bit 1 of the new
XPERCON register. Accesses to the CAN Module
use demultiplexed addresses and a 16-bit data
bus (Byte accesses are possible). Two wait states
give an access time of 125ns at 32MHz CPU
clock. No tri-state wait states are used.
In order to meet the needs of designs where more
memory is required than is provided on chip, up to
16M Bytes of external RAM and/or ROM can be
connected to the microcontroller.
Note If one or the two CAN modules are used,
Port 4 cannot be programmed to output all
8 segment address lines. Thus, only 4
segment address lines can be used,
reducing the external memory space to 5M
Bytes (1M Byte per CS line).
Visibility of XBUS Peripherals
In order to keep the ST10F269-T3 compatible with
the ST10C167 and with the ST10F167, the XBUS
peripherals can be selected to be visible and / or
accessible on the external address / data bus.
CAN1EN and CAN2EN bits of XPERCON register
must be set. If these bits are cleared before the
global enabling with XPEN-bit in SYSCON
register, the corresponding address space, port
pins and interrupts are not occupied by the
peripheral, thus the peripheral is not visible and
not available. Refer to Chapter 20 - Special
Function Register Overview.
ST10F269-T3
Figure 4 : ST10F269-T3 On-chip Memory Mapping
Segment 2 Segment 3 Segment 4
14
RAM, SFR and X-pheripherals are
mapped into the address space.
05’0000
00’FFFF
Block6 = 64K Bytes
10
SFR : 512 Bytes
04’0000
00’FE00
00’FDFF
Block5 = 64K Bytes
0C
03’0000
08
02’0000
IRAM : 2K Bytes
00’F600
Block4 = 64K Bytes
00’F1FF
ESFR : 512 Bytes
Segment 1
07
Block3 = 32K Bytes Bank 1H
06
01’8000
05
04
01’0000
00’F000
00’EFFF
Block2*
Block1*
Block0*
CAN1 : 256 Bytes
Bank 1L
00’EF00
00’EEFF
CAN2 : 256 Bytes
00’EE00
03
Segment 0
00’C000
00’EC14
02
Real Time Clock
00’EC00
01
00’6000
00’4000
Block2 = 8K Bytes
Block1 = 8K Bytes
Bank OL
00’E7FF
XRAM1 : 2K Bytes
Block0 = 16K Bytes
00
00’0000
Data
Page
Number
Absolute
Memory
Address
00’E000
00’DFFF
Internal
Flash
Memory
XRAM2 : 8K Bytes
00’C000
* Bank 0L may be remapped from segment 0 to segment 1 (Bank 1L) by setting SYSCON-ROMS1 (before EINIT)
Data Page Number and Absolute Memory Address are hexadecimal values.
15/160
ST10F269-T3
XPERCON (F024h / 12h)
ESFR
Reset Value: - - 05h
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
-
-
-
RTCEN
XRAM2EN
XRAM1EN
CAN2EN
CAN1EN
RW
RW
RW
RW
RW
CAN1EN
CAN1 Enable Bit
‘0’: Accesses to the on-chip CAN1 XPeripheral and its functions are disabled. P4.5 and P4.6 pins can be
used as general purpose I/Os. Address range 00’EF00h-00’EFFFh is only directed to external memory if
CAN2EN is also ‘0’.
‘1’: The on-chip CAN1 XPeripheral is enabled and can be accessed.
CAN2EN
CAN2 Enable Bit
‘0’: Accesses to the on-chip CAN2 XPeripheral and its functions are disabled. P4.4 and P4.7 pins can be
used as general purpose I/Os. Address range 00’EE00h-00’EEFFh is only directed to external memory if
CAN1EN is also ‘0’.
‘1’: The on-chip CAN2 XPeripheral is enabled and can be accessed.
XRAM1EN
XRAM1 Enable Bit
‘0’: Accesses to external memory within space 00’E000h to 00’E7FFh. The 2K Bytes of internal XRAM1
are disabled.
’1’: Accesses to the internal 2K Bytes of XRAM1.
XRAM2EN
XRAM2 Enable Bit
‘0’: Accesses to the external memory within space 00’C000h to 00’DFFFh. The 8K Bytes of internal
XRAM2 are disabled.
’1’: Accesses to the internal 8K Bytes of XRAM2.
RTCEN
RTC Enable Bit
’0’: Accesses to the on-chip Real Time Clock are disabled, external access is performed. Address range
00’EC00h-00’ECFFh is only directed to external memory if CAN1EN and CAN2EN are ’0’ also
’1’: The on-chip Real Time Clock is enabled and can be accessed.
Note: - When both CAN are disabled via XPERCON setting, then any access in the
address range 00’EE00h - 00’EFFFh will
be directed to external memory interface,
using the BUSCONx register corresponding to address matching ADDRSELx register. P4.4 and P4.7 can be used as General
Purpose I/O when CAN2 is disabled, and
P4.5 and P4.6 can be used as General
Purpose I/O when CAN1 is disabled.
- The default XPER selection after Reset is
identical to XBUS configuration of
ST10C167: XCAN1 is enabled, XCAN2 is
disabled, XRAM1 (2K Byte compatible
XRAM) is enabled, XRAM2 (new 8K Byte
XRAM) is disabled.
16/160
- Register XPERCON cannot be changed
after the global enabling of XPeripherals,
i.e. after the setting of bit XPEN in the
SYSCON register.
- In EMUlation mode, all the XPERipherals
are enabled (XPERCON bit are all set).
The access to external memory and/or
XBus is controlled by the bondout chip.
- When the Real Time Clock is disabled
(RTCEN = 0), the clock oscillator is
switch-off if the ST10 enters in
power-down mode. Otherwise, when the
Real Time Clock is enabled, the bit
RTCOFF of the RTCCON register allows
to choose the power-down mode of the
clock oscillator (See Chapter 16 - Real
Time Clock).
ST10F269-T3
5 - INTERNAL FLASH MEMORY
Access to data of internal Flash can only be performed with an inner protected program
5.1 - Overview
– 256K Byte on-chip Flash memory
– Two possibilities of Flash mapping into the CPU
address space
– Flash memory can be used for code and data
storage
– 32-bit, zero waitstate read access (62.5ns cycle
time at fCPU = 32MHz)
– Erase Suspend and Resume Modes
• Read and Program another Block during erase
suspend
– Single Voltage operation, no need of dedicated
supply pin
– Low Power Consumption:
– Erase-Program Controller (EPC) similar to
M29F400B STM’s stand-alone Flash memory
• 45mA max. Read current
• Word-by-Word Programmable (16µs typical)
• 60mA max. Program or Erase current
• Data polling and Toggle Protocol for EPC
Status
• Automatic Stand-by-mode (50µA maximum)
• Ready/Busy signal connected on XP2INT
interrupt line
– 100,000 Erase-Program Cycles per block,
20 years of data retention time
– Operating temperature: -40 to +125oC
• Internal Power-On detection circuit
5.2 - Operational Overview
– Memory Erase in blocks
• One 16K Byte, two 8K Byte, one 32K Byte,
three 64K Byte blocks
• Each block can
(1.5 second typical)
be
erased
separately
• Chip erase (8.5 second typical)
• Each block can be separately protected
against programming and erasing
• Each protected block can be temporary unprotected
• When enabled, the read protection prevents
access to data in Flash memory using a program running out of the Flash memory space.
Read Mode
In standard mode (the normal operating mode)
the Flash appears like an on-chip ROM with the
same timing and functionality. The Flash module
offers a fast access time, allowing zero waitstate
access with CPU frequency up to 32MHz.
Instruction fetches and data operand reads are
performed with all addressing modes of the
ST10F269-T3 instruction set.
In order to optimize the programming time of the
internal Flash, blocks of 8K Bytes, 16K Bytes,
32K Bytes, 64K Bytes can be used. But the size of
the blocks does not apply to the whole memory
space, see details in Table 2.
Table 2 : 256K Byte Flash Memory Block Organization
Block
Addresses (Segment 0)
Addresses (Segment 1)
Size (byte)
0
00’0000h to 00’3FFFh
01’0000h to 01’3FFFh
16K
1
00’4000h to 00’5FFFh
01’4000h to 01’5FFFh
8K
2
00’6000h to 00’7FFFh
01’6000h to 01’7FFFh
8K
3
01’8000h to 01’FFFFh
01’8000h to 01’FFFFh
32K
4
02’0000h to 02’FFFFh
02’0000h to 02’FFFFh
64K
5
03’0000h to 03’FFFFh
03’0000h to 03’FFFFh
64K
6
04’0000h to 04’FFFFh
04’0000h to 04’FFFFh
64K
17/160
ST10F269-T3
Instructions and Commands
All operations besides normal read operations are
initiated and controlled by command sequences
written to the Flash Command Interface (CI). The
Command Interface (CI) interprets words written
to the Flash memory and enables one of the
following operations:
– Read memory array
– Program Word
– Block Erase
– Chip Erase
– Erase Suspend
– Erase Resume
– Block Protection
– Block Temporary Unprotection
– Code Protection
Commands are composed of several write cycles
at specific addresses of the Flash memory. The
different write cycles of such command
sequences offer a fail-safe feature to protect
against an inadvertent write.
A command only starts when the Command
Interface has decoded the last write cycle of an
operation. Until that last write is performed, Flash
memory remains in Read Mode
Notes: 1. As it is not possible to perform write
operations in the Flash while fetching code
from Flash, the Flash commands must be
written by instructions executed from
internal RAM or external memory.
2. Command write cycles do not need to
be consecutively received, pauses are
allowed, save for Block Erase command.
During this operation all Erase Confirm
commands must be sent to complete any
block erase operation before time-out
period expires (typically 96µs). Command
sequencing must be followed exactly. Any
invalid combination of commands will reset
the Command Interface to Read Mode.
Status Register
This register is used to flag the status of the
memory and the result of an operation. This
register can be accessed by read cycles during
the Erase-Program Controller (EPC) operation.
Erase Operation
This Flash memory features a block erase
architecture with a chip erase capability too. Erase
is accomplished by executing the six cycle erase
command sequence. Additional command write
18/160
cycles can then be performed to erase more than
one block in parallel. When a time-out period
elapses (96µs) after the last cycle, the
Erase-Program Controller (EPC) automatically
starts and times the erase pulse and executes the
erase operation. There is no need to program the
block to be erased with ‘0000h’ before an erase
operation. Termination of operation is indicated in
the Flash status register. After erase operation,
the Flash memory locations are read as 'FFFFh’
value.
Erase Suspend
A block erase operation is typically executed
within 1.5 second for a 64K Byte block. Erasure of
a memory block may be suspended, in order to
read data from another block or to program data in
another block, and then resumed.
In-System Programming
In-system programming is fully supported. No
special programming voltage is required. Because
of the automatic execution of erase and
programming algorithms, write operations are
reduced to transferring commands and data to the
Flash and reading the status. Any code that
programs or erases Flash memory locations (that
writes data to the Flash) must be executed from
memory outside the on-chip Flash memory itself
(on-chip RAM or external memory).
A boot mechanism is provided to support
in-system programming. It works using serial link
via USART interface and a PC compatible or other
programming host.
Read/Write Protection
The Flash module supports read and write
protection in a very comfortable and advanced
protection functionality. If Read Protection is
installed, the whole Flash memory is protected
against any "external" read access; read
accesses are only possible with instructions
fetched directly from program Flash memory. For
update of the Flash memory a temporary disable
of Flash Read Protection is supported.
The device also features a block write protection.
Software locking of selectable memory blocks is
provided to protect code and data. This feature
will disable both program and erase operations in
the selected block(s) of the memory. Block
Protection is accomplished by block specific
lock-bit which are programmed by executing a
four cycle command sequence. The locked state
of blocks is indicated by specific flags in the
according block status registers. A block may only
ST10F269-T3
be temporarily unlocked for update (write)
operations.
With the two possibilities for write protection whole memory or block specific - a flexible
installation of write protection is supported to
protect the Flash memory or parts of it from
unauthorized programming or erase accesses
and to provide virus-proof protection for all system
code blocks. All write protection also is enabled
during boot operation.
Power Supply, Reset
The Flash module uses a single power supply for
both read and write functions. Internally generated
and regulated voltages are provided for the
program and erase operations from 5V supply.
Once a program or erase cycle has been
completed, the device resets to the standard read
mode. At power-on, the Flash memory has a setup
phase of some microseconds (dependent on the
power supply ramp-up). During this phase, Flash
can not be read. Thus, if EA pin is high (execution
will start from Flash memory), the CPU will remains
in reset state until the Flash can be accessed.
5.3 - Architectural Description
The Flash module distinguishes two basic
operating modes, the standard read mode and the
command mode. The initial state after power-on
and after reset is the standard read mode.
5.3.1 - Read Mode
The Flash module enters the standard operating
mode, the read mode:
– After Reset command
– After every completed erase operation
– After every completed programming operation
– After every other completed command
execution
– Few microseconds after a CPU-reset has
started
– After incorrect address and data values of
command sequences or writing them in an
improper sequence
– After incorrect write access to a read protected
Flash memory
The read mode remains active until the last
command of a command sequence is decoded
which starts directly a Flash array operation, such
as:
– erase one or several blocks
– program a word into Flash array
– protected / temporary unprotected a block.
In the standard read mode read accesses are
directly controlled by the Flash memory array,
delivering a 32-bit double Word from the
addressed position. Read accesses are always
aligned to double Word boundaries. Thus, both
low order address bit A1 and A0 are not used in
the Flash array for read accesses. The high order
address bit A17/A16 define the physical 64K Byte
segment being accessed within the Flash array.
5.3.2 - Command Mode
Every operation besides standard read operations
is initiated by commands written to the Flash
command register. The addresses used for
command cycles define in conjunction with the
actual state the specific step within command
sequences. With the last command of a command
sequence, the Erase-Program Controller (EPC)
starts the execution of the command. The EPC
status is indicated during command execution by:
– The Status Register,
– The Ready/Busy signal.
5.3.3 - Ready/Busy Signal
The Ready/Busy (R/B) signal is connected to the
XPER2 interrupt node (XP2IC). When R/B is high,
the Flash is busy with a Program or Erase
operation and will not accept any additional
program or erase instruction. When R/B is Low,
the Flash is ready for any Read/Write or Erase
operation. The R/B will also be low when the
memory is put in Erase Suspend mode.
This signal can be polled by reading XP2IC
register, or can be used to trigger an interrupt
when the Flash goes from Busy to Ready.
5.3.4 - Flash Status Register
The Flash Status register is used to flag the status
of the Flash memory and the result of an
operation. This register can be accessed by Read
cycles during the program-Erase Controller
operations. The program or erase operation can
be controlled by data polling on bit FSB.7 of
Status Register, detection of Toggle on FSB.6 and
FSB.2, or Error on FSB.5 and Erase Time-out on
FSB.3 bit. Any read attempt in Flash during EPC
operation will automatically output these five bits.
The EPC sets bit FSB.2, FSB.3, FSB.5, FSB.6
and FSB.7. Other bits are reserved for future use
and should be masked.
19/160
ST10F269-T3
Flash Status (see note for address)
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
6
5
FSB.7 FSB.6 FSB.5
R
R
R
4
3
2
1
0
-
FSB.3
FSB.2
-
-
R
R
FSB.7
Flash Status bit 7: Data Polling Bit
Programming Operation: this bit outputs the complement of the bit 7 of the word being
programmed, and after completion, will output the bit 7 of the word programmed.
Erasing Operation: outputs a ‘0’ during erasing, and ‘1’ after erasing completion.
If the block selected for erasure is (are) protected, FSB.7 will be set to ‘0’ for about 100 µs, and
then return to the previous addressed memory data value.
FSB.7 will also flag the Erase Suspend Mode by switching from ‘0’ to ‘1’ at the start of the
Erase Suspend.
During Program operation in Erase Suspend Mode, FSB.7 will have the same behaviour as in
normal Program execution outside the Suspend mode.
FSB.6
Flash Status bit 6: Toggle Bit
Programming or Erasing Operations: successive read operations of Flash Status register will
deliver complementary values. FSB.6 will toggle each time the Flash Status register is read.
The Program operation is completed when two successive reads yield the same value. The
next read will output the bit last programmed, or a ‘1’ after Erase operation
FSB.6 will be set to‘1’ if a read operation is attempted on an Erase Suspended block. In
addition, an Erase Suspend/Resume command will cause FSB.6 to toggle.
FSB.5
Flash Status bit 5: Error Bit
This bit is set to ‘1’ when there is a failure of Program, block or chip erase operations.This bit
will also be set if a user tries to program a bit to ‘1’ to a Flash location that is currently
programmed with ‘0’.
The error bit resets after Read/Reset instruction.
In case of success, the Error bit will be set to ‘0’ during Program or Erase and then will output
the bit last programmed or a ‘1’ after erasing
FSB.3
Flash Status bit 3: Erase Time-out Bit
This bit is cleared by the EPC when the last Block Erase command has been entered to the
Command Interface and it is awaiting the Erase start. When the time-out period is finished,
after 96 µs, FSB.3 returns back to ‘1’.
FSB.2
Flash Status bit 2: Toggle Bit
This toggle bit, together with FSB.6, can be used to determine the chip status during the Erase
Mode or Erase Suspend Mode. It can be used also to identify the block being Erased
Suspended. A Read operation will cause FSB.2 to Toggle during the Erase Mode. If the Flash
is in Erase Suspend Mode, a Read operation from the Erase suspended block or a Program
operation into the Erase suspended block will cause FSB.2 to toggle.
When the Flash is in Program Mode during Erase Suspend, FSB.2 will be read as ‘1’ if address
used is the address of the word being programmed.
After Erase completion with an Error status, FSB.2 will toggle when reading the faulty sector.
Note: The Address of Flash Status Register is the address of the word being programmed when
Programming operation is in progress, or an address within block being erased when Erasing
operation is in progress.
20/160
ST10F269-T3
5.3.5 - Flash Protection Register
The Flash Protection register is a non-volatile register that contains the protection status. This register
can be read by using the Read Protection Status (RP) command, and programmed by using the dedicated Set Protection command.
Flash Protection Register (PR)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
CP
-
-
-
-
-
-
-
-
BP6
BP5
BP4
BP3
BP2
BP1
BP0
BPx
Block x Protection Bit (x = 0...6)
‘0’: the Block Protection is enabled for block x. Programming or erasing the block is not
possible, unless a Block Temporary Unprotection command is issued.
1’: the Block Protection is disabled for block x.
Bit is ‘1’ by default, and can be programmed permanently to ‘0’ using the Set Protection
command but then cannot be set to ‘1’ again. It is therefore possible to temporally disable the
Block Protection using the Block Temporary Unprotection instruction.
CP
Code Protection Bit
‘0’: the Flash Code Protection is enabled. Read accesses to the Flash for execution not
performed in the Flash itself are not allowed, the returned value will be 009Bh, whatever the
content of the Flash is.
1’: the Flash Code Protection is disabled: read accesses to the Flash from external or internal
RAM are allowed
Bit is ‘1’ by default, and can be programmed permanently to ‘0’ using the Set Protection
command but then cannot be set to ‘1’ again. It is therefore possible to temporally disable the
Code Protection using the Code Temporary Unprotection instruction.
5.3.6 - Instructions Description
Twelve instructions dedicated to Flash memory
accesses are defined as follow:
Read/Reset (RD). The Read/Reset instruction
consist of one write cycle with data XXF0h. it can
be optionally preceded by two CI enable coded
cycles (data xxA8h at address 1554h + data
xx54h at address 2AA8h). Any successive read
cycle following a Read/Reset instruction will read
the memory array. A Wait cycle of 10µs is
necessary after a Read/Reset command if the
memory was in program or Erase mode.
Program Word (PW). This instruction uses four
write cycles. After the two Cl enable coded cycles,
the Program Word command xxA0h is written at
address 1554h. The following write cycle will latch
the address and data of the word to be
programmed. Memory programming can be done
only by writing 0's instead of 1's, otherwise an
error occurs. During programming, the Flash
Status is checked by reading the Flash Status bit
FSB.2, FSB.5, FSB.6 and FSB.7 which show the
status of the EPC. FSB.2, FSB.6 and FSB.7
determine if programming is on going or has
completed, and FSB.5 allows a check to be made
for any possible error.
Block Erase (BE). This instruction uses a
minimum of six command cycles. The erase
enable command xx80h is written at address
1554h after the two-cycle CI enable sequence.
The erase confirm code xx30h must be written at
an address related to the block to be erased
preceded by the execution of a second CI enable
sequence. Additional erase confirm codes must
be given to erase more than one block in parallel.
Additional erase confirm commands must be
written within a defined time-out period. The input
of a new Block Erase command will restart the
time-out period.
When this time-out period has elapsed, the erase
starts. The status of the internal timer can be
monitored through the level of FSB.3, if FSB.3 is
‘0’, the Block Erase command has been given and
the time-out is running; if FSB.3 is ‘1’, the time-out
has expired and the EPC is erasing the block(s).
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ST10F269-T3
If the second command given is not an erase
confirm or if the coded cycles are wrong, the
instruction aborts, and the device is reset to Read
Mode. It is not necessary to program the block with
0000h as the EPC will do this automatically before
the erasing to FFFFh. Read operations after the
EPC has started, output the Flash Status Register.
During the execution of the erase by the EPC, the
device accepts only the Erase Suspend and
Read/Reset instructions. Data Polling bit FSB.7
returns ‘0’ while the erasure is in progress, and ‘1’
when it has completed. The Toggle bit FSB.2 and
FSB.6 toggle during the erase operation. They
stop when erase is completed. After completion,
the Error bit FSB.5 returns ‘1’ if there has been an
erase failure because erasure has not completed
even after the maximum number of erase cycles
have been executed by the EPC, in this case, it
will be necessary to input a Read/Reset to the
Command Interface in order to reset the EPC.
Chip Erase (CE). This instruction uses six write
cycles. The Erase Enable command xx80h, must
be written at address 1554h after CI-Enable
cycles. The Chip Erase command xx10h must be
given on the sixth cycle after a second CI-Enable
sequence. An error in command sequence will
reset the CI to Read mode. It is NOT necessary to
program the block with 0000h as the EPC will do
this automatically before the erasing to FFFFh.
Read operations after the EPC has started output
the Flash Status Register. During the execution of
the erase by the EPC, Data Polling bit FSB.7
returns ‘0’ while the erasure is in progress, and ‘1’
when it has completed. The FSB.2 and FSB.6 bit
toggle during the erase operation. They stop when
erase is finished. The FSB.5 error bit returns "1" in
case of failure of the erase operation. The error
flag is set after the maximum number of erase
cycles have been executed by the EPC. In this
case, it will be necessary to input a Read/Reset to
the Command Interface in order to reset the EPC.
Erase Suspend (ES). This instruction can be
used to suspend a Block Erase operation by
giving the command xxB0h without any specific
address. No CI-Enable cycles is required. Erase
Suspend operation allows reading of data from
another block and/or the programming in another
block while erase is in progress. If this command
is given during the time-out period, it will terminate
the time-out period in addition to erase Suspend.
The Toggle bit FSB.6, when monitored at an
address that belongs to the block being erased,
stops toggling when Erase Suspend Command is
effective, It happens between 0.1µs and 15µs
after the Erase Suspend Command has been
22/160
written. The Flash will then go in normal Read
Mode, and read from blocks not being erased is
valid, while read from block being erased will
output FSB.2 toggling. During a Suspend phase
the only instructions valid are Erase Resume and
Program Word. A Read / Reset instruction during
Erase suspend will definitely abort the Erase and
result in invalid data in the block being erased.
Erase Resume (ER). This instruction can be
given when the memory is in Erase Suspend
State. Erase can be resumed by writing the
command xx30h at any address without any
Cl-enable sequence.
Program during Erase Suspend. The Program
Word instruction during Erase Suspend is allowed
only on blocks that are not Erase-suspended. This
instruction is the same than the Program Word
instruction.
Set Protection (SP). This instruction can be used
to enable both Block Protection (to protect each
block independently from accidental Erasing-Programming Operation) and Code Protection (to
avoid code dump). The Set Protection Command
must be given after a special CI-Protection Enable
cycles (see instruction table). The following Write
cycle, will program the Protection Register. To protect the block x (x = 0 to 6), the data bit x must be
at ‘0’. To protect the code, bit 15 of the data must
be ‘0’. Enabling Block or Code Protection is permanent and can be cleared only by STM. Block
Temporary Unprotection and Code Temporary
Unprotection instructions are available to allow the
customer to update the code.
Notes: 1. The new value programmed in protection
register will only become active after a reset.
2. Bit that are already at ’0’ in protection
register must be confirmed at ’0’ also in
data latched during the 4th cycle of set
protection command, otherwise an error
may occur.
Read Protection Status (RP). This instruction is
used to read the Block Protection status and the
Code Protection status. To read the protection
register (see Table 3), the CI-Protection Enable
cycles must be executed followed by the
command xx90h at address x2A54h. The
following Read Cycles at any odd word address
will output the Block Protection Status. The Read/
Reset command xxF0h must be written to reset
the protection interface.
Note: After a modification of protection register
(using Set Protection command), the Read
Protection Status will return the new PR
value only after a reset.
ST10F269-T3
Block Temporary Unprotection (BTU). This Instruction can be used to temporary unprotect all the
blocks from Program / Erase protection. The Unprotection is disabled after a Reset cycle. The Block
Temporary Unprotection command xxC1h must be given to enable Block Temporary Unprotection. The
Command must be preceded by the CI-Protection Enable cycles and followed by the Read/Reset
command xxF0h.
Set Code Protection (SCP). This kind of protection allows the customer to protect the proprietary code
written in Flash. If installed and active, Flash Code Protection prevents data operand accesses and
program branches into the on-chip Flash area from any location outside the Flash memory itself. Data
operand accesses and branches to Flash locations are only and exclusively allowed for instructions
executed from the Flash memory itself. Every read or jump to Flash performed from another memory (like
internal RAM, external memory) while Code Protection is enabled, will give the opcode 009Bh related to
TRAP #00 illegal instruction. The CI-Protection Enable cycles must be sent to set the Code Protection. By
writing data 7FFFh at any odd word address, the Code Protected status is stored in the Flash Protection
Register (PR). Protection is permanent and cannot be cleared by the user. It is possible to temporarily
disable the Code Protection using Code Temporary Unprotection instruction.
Note: Bits that are already at ’0’ in protection register must be confirmed at ’0’ also in data latched during
the 4th cycle of set protection command, otherwise an error may occur.
Code Temporary Unprotection (CTU). This instruction must be used to temporary disable Code
Protection. This instruction is effective only if executed from Flash memory space. To restore the
protection status, without using a reset, it is necessary to use a Code Temporary Protection instruction.
System reset will reset also the Code Temporary Unprotected status. The Code Temporary Unprotection
command consists of the following write cycle:
MOV
MEM, Rn
; This instruction MUST be executed from Flash memory space
Where MEM is an absolute address inside memory space, Rn is a register loaded with data 0FFFFh.
Code Temporary Protection (CTP). This instruction allows to restore Code Protection. This operation is
effective only if executed from Flash memory and is necessary to restore the protection status after the
use of a Code Temporary Unprotection instruction.
The Code Temporary Protection command consists of the following write cycle:
MOV
MEM, Rn
; This instruction MUST be executed from Flash memory space
Where MEM is an absolute address inside memory space, Rn is a register loaded with data 0FFFBh.
Note that Code Temporary Unprotection instruction must be used when it is necessary to modify the
Flash with protected code (SCP), since the write/erase routines must be executed from a memory
external to Flash space. Usually, the write/erase routines, executed in RAM, ends with a return to Flash
space where a CTP instruction restore the protection.
23/160
ST10F269-T3
Table 3 : Instructions
Instruction
Read/Reset
Read/Reset
RD
RD
1+
3+
Program Word
PW
4
Block Erase
BE
6
Chip Erase
Erase Suspend
Erase Resume
1st
Cycle
Mne Cycle
CE
ES
ER
6
1
1
Read
Protection
Status
RP
Code
Temporary
Unprotection
CTU
1
Code
Temporary
Protection
CTP
1
7th
Cycle
Addr.1
x1554h
x2AA8h
xxxxxh
Data
xxA8h
xx54h
xxF0h
Addr.1
x1554h
x2AA8h
x1554h
WA 3
Data
xxA8h
xx54h
xxA0h
WD 4
Addr.1
x1554h
x2AA8h
x1554h
x1554h
x2AA8h
BA
BA’ 5
Data
xxA8h
xx54h
xx80h
xxA8h
xx54h
xx30h
xx30h
Addr.1
x1554h
x2AA8h
x1554h
x1554h
x2AA8h
x1554h
Data
xxA8h
xx54h
xx80h
xxA8h
xx54h
xx10h
Addr.1
X2
Data
xxB0h
Addr.1
X2
xx30h
Read Memory Array until a new write cycle is initiated
Read Memory Array until a new write
cycle is initiated
Read Data Polling or Toggle bit until Program completes.
Note 6
Read until Toggle stops, then read or program all data needed
from block(s) not being erased then Resume Erase.
Read Data Polling or Toggle bit until Erase completes or Erase is
suspended another time.
Addr.
x2A54h
x15A8h
x2A54h
Any odd
word
address 9
Data
xxA8h
xx54h
xxC0h
WPR 7
Addr.1
x2A54h
x15A8h
x2A54h
Any odd
word
address 9
Data
xxA8h
xx54h
xx90h
Addr.
x2A54h
x15A8h
x2A54h
X2
Data
xxA8h
xx54h
xxC1h
xxF0h
Addr.1
MEM 8
Data
FFFFh
Addr.1
MEM 8
Data
FFFBh
1
4
6th
Cycle
xxF0h
4
BTU
5th
Cycle
Data
4
Block
Temporary
Unprotection
4th Cycle
X2
1
SP
3rd
Cycle
Addr.1
Data
Set Block/Code
Protection
2nd
Cycle
Read PR
Read Protection Register
until a new write cycle is
initiated.
Write cycles must be executed from Flash.
Write cycles must be executed from Flash.
Notes 1. Address bit A14, A15 and above are don’t care for coded address inputs.
2. X = Don’t Care.
3. WA = Write Address: address of memory location to be programmed.
4. WD = Write Data: 16-bit data to be programmed
5. Optional, additional blocks addresses must be entered within a time-out delay (96 µs) after last write entry, time-out status can be
verified through FSB.3 value. When full command is entered, read Data Polling or Toggle bit until Erase is completed or suspended.
6. Read Data Polling or Toggle bit until Erase completes.
7. WPR = Write protection register. To protect code, bit 15 of WPR must be ‘0’. To protect block N (N=0,1,...), bit N of WPR must be
‘0’. Bit that are already at ‘0’ in protection register must also be ‘0’ in WPR, else a writing error will occurs (it is not possible to write a
‘1’ in a bit already programmed at ‘0’).
8. MEM = any address inside the Flash memory space. Absolute addressing mode must be used (MOV MEM, Rn), and instruction
must be executed from Flash memory space.
9. Odd word address = 4n-2 where n = 0, 1, 2, 3..., ex. 0002h, 0006h...
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ST10F269-T3
– Generally, command sequences cannot be
written to Flash by instructions fetched from the
Flash itself. Thus, the Flash commands must be
written by instructions, executed from internal
RAM or external memory.
– Command cycles on the CPU interface need not
to be consecutively received (pauses allowed).
The CPU interface delivers dummy read data for
not used cycles within command sequences.
– All addresses of command cycles shall be
defined only with Register-indirect addressing
mode in the according move instructions. Direct
addressing is not allowed for command
sequences. Address segment or data page
pointer are taken into account for the command
address value.
5.3.7 - Reset Processing and Initial State
The Flash module distinguishes two kinds of CPU
reset types
The lengthening of CPU reset:
– Is not reported to external devices by
bidirectional pin
– Is not enabled in case of external start of CPU
after reset.
5.4 - Flash Memory Configuration
The default memory configuration of the
ST10F269-T3 Memory is determined by the state
of the EA pin at reset. This value is stored in the
Internal ROM Enable bit (named ROMEN) of the
SYSCON register.
When ROMEN = 0, the internal Flash is disabled
and external ROM is used for startup control.
Flash memory can later be enabled by setting the
ROMEN bit of SYSCON to 1. The code
performing this setting must not run from a
segment of the external ROM to be replaced by a
segment of the Flash memory, otherwise
unexpected behaviour may occur.
For example, if external ROM code is located in
the first 32K Bytes of segment 0, the first
32K Bytes of the Flash must then be enabled in
segment 1. This is done by setting the ROMS1 bit
of SYSCON to 0 before or simultaneously with
setting of ROMEN bit. This must be done in the
externally supplied program before the execution
of the EINIT instruction.
If program execution starts from external memory,
but access to the Flash memory mapped in
segment 0 is later required, then the code that
performs the setting of ROMEN bit must be
executed either in the segment 0 but above
address 00’8000h, or from the internal RAM.
Bit ROMS1 only affects the mapping of the first
32K Bytes of the Flash memory. All other parts of
the Flash memory (addresses 01’8000h 04’FFFFh) remain unaffected.
The SGTDIS Segmentation Disable / Enable must
also be set to 0 to allow the use of the full
256K Bytes of on-chip memory in addition to the
external boot memory. The correct procedure on
changing the segmentation registers must also be
observed to prevent an unwanted trap condition:
– Instructions that configure the internal memory
must only be executed from external memory or
from the internal RAM.
– An Absolute Inter-Segment Jump (JMPS)
instruction must be executed after Flash
enabling, to the next instruction, even if this next
instruction is located in the consecutive address.
– Whenever the internal Memory is disabled,
enabled or remapped, the DPPs must be
explicitly (re)loaded to enable correct data
accesses to the internal memory and/or external
memory.
5.5 - Application Examples
5.5.1 - Handling of Flash Addresses
All command, Block, Data and register addresses
to the Flash have to be located within the active
Flash memory space. The active space is that
address range to which the physical Flash
addresses are mapped as defined by the user.
When using data page pointer (DPP) for block
addresses make sure that address bit A15 and
A14 of the block address are reflected in both
LSBs of the selected DPPS.
Note: - For Command Instructions, address bit
A14, A15, A16 and A17 are don’t care.
This simplify a lot the application software,
because it minimizes the use of DPP registers when using Command in the Command Interface.
- Direct addressing is not allowed for
Command sequence operations to the
Flash. Only Register-indirect addressing
can be used for command, block or
write-data accesses.
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ST10F269-T3
5.5.2 - Basic Flash Access Control
When accessing the Flash all command write addresses have to be located within the active Flash
memory space. The active Flash memory space is that logical address range which is covered by the
Flash after mapping. When using data page pointer (DPP) for addressing the Flash, make sure that
address bit A15 and A14 of the command addresses are reflected in both LSBs of the selected data page
pointer (A15 - DPPx.1 and A14 - DPPx.0).
In case of the command write addresses, address bit A14, A15 and above are don’t care. Thus, command
writes can be performed by only using one DPP register. This allow to have a more simple and compact
application software.
Another - advantageous - possibility is to use the extended segment instruction for addressing.
Note: The direct addressing mode is not allowed for write access to the Flash address/command
register. Be aware that the C compiler may use this kind of addressing. For write accesses to
Flash module always the indirect addressing mode has to be selected.
The following basic instruction sequences show examples for different addressing possibilities.
Principle example of address generation for Flash commands and registers:
When using data page pointer (DPP0 is this example)
MOV
DPP0,#08h
;adjust data page pointers according to the
;addresses: DPP0 is used in this example, thus
;ADDRESS must have A14 and A15 bit set to ‘0’.
MOV
Rwm,#ADDRESS
;ADDRESS could be a dedicated command sequence
;address 2AA8h, 1554h ... ) or the Flash write
;address
MOV
Rwn,#DATA
;DATA could be a dedicated command sequence data
;(xxA0h,xx80h ... ) or data to be programmed
MOV
[Rwm],Rwn
;indirect addressing
When using the extended segment instruction:
MOV
Rwm,#ADDRESS
;ADDRESS could be a dedicated command sequence
;address (2AA8h, 1554h ... ) or the Flash write
;address
MOV
Rwo,#DATA
;DATA could be a dedicated command sequence data
;(xxA0h,xx80h ... ) or data to be programmed
MOV
Rwn,#SEGMENT
;the value of SEGMENT represents the segment
;number and could be 0, 1, 2, 3 or 4 (depending
;on sector mapping) for 256KByte Flash.
EXTS
Rwn,#LENGTH
;the value of Rwn determines the 8-bit segment
;valid for the corresponding data access for any
;long or indirect address in the following(s)
;instruction(s). LENGTH defines the number of
;the effected instruction(s) and has to be a value
;between 1...4
MOV
[Rwm],Rwo
;indirect addressing with segment number from
;EXTS
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ST10F269-T3
5.5.3 - Programming Examples
Most of the microcontroller programs are written in the C language where the data page pointers are
automatically set by the compiler. But because the C compiler may use the not allowed direct addressing
mode for Flash write addresses, it is necessary to program the organizational Flash accesses (command
sequences) with assembler in-line routines which use indirect addressing.
Example 1 Performing the command Read/Reset
We assume that in the initialization phase the lowest 32K Bytes of Flash memory (sector 0) have been
mapped to segment 1.
According to the usual way of ST10 data addressing with data page pointers, address bit A15 and A14 of
a 16-bit command write address select the data page pointer (DPP) which contains the upper 10-bit for
building the 24-bit physical data address. Address bit A13...A0 represent the address offset. As the bit
A14...A17 are "don’t care" when written a Flash command in the Command Interface (CI), we can choose
the most convenient DPPx register for address handling.
The following examples are making usage of DPP0. We just have to make sure, that DPP0 points to
active Flash memory space.
To be independent of mapping of sector 0 we choose for all DPPs which are used for Flash address
handling, to point to segment 2.
For this reason we load DPP0 with value 08h (00 0000 l000b).
MOV
R5, #01554h
;load auxilary register R5 with command address
;(used in command cycle 1)
MOV
R6, #02AA8h
;load auxilary register R6 with command address
;(used in command cycle 2)
SCXT DPPO, #08h
;push data page pointer 0 and load it to point to
;segment 2
MOV
R7, #0A8h
;load register R7 with 1st CI enable command
MOV
[R5], R7
;command cycle 1
MOV
R7, #054h
;load register R7 with 2cd CI enable command
MOV
[R6], R7
;command cycle 2
MOV
R7, #0F0h
;load register R7 with Read/Reset command
MOV
[R5], R7
;command cycle 3. Address is don’t care
POP
DPP0
;restore DPP0 value
In the example above the 16-bit registers R5 and R6 are used as auxiliary registers for indirect
addressing.
Example 2 Performing a Program Word command
We assume that in the initialization phase the lowest 32K Bytes of Flash memory (sector 0) have been
mapped to segment 1.The data to be written is loaded in register R13, the address to be programmed is
loaded in register R11/R12 (segment number in R11, segment offset in R12).
MOV
R5, #01554h
;load auxilary register R5 with command address
;(used in command cycle 1)
MOV
R6, #02AA8h
;load auxilary register R6 with command address
;(used in command cycle 2)
SXCT DPPO, #08h
;push data page pointer 0 and load it to point to
;segment 2
MOV
R7, #0A8h
;load register R7 with 1st CI enable command
MOV
[R5], R7
;command cycle 1
MOV
R7, #054h
;load register R7 with 2cd CI enable command
MOV
[R6], R7
;command cycle 2
MOV
R7, #0A0h
;load register R7 with Program Word command
MOV
[R5], R7
;command cycle 3
POP
DPP0
;restore DPP0: following addressing to the Flash
;will use EXTended instructions
;R11 contains the segment to be programmed
27/160
ST10F269-T3
;R12 contains the segment offset address to be
;programmed
;R13 contains the data to be programmed
EXTS
R11, #1
;use EXTended addressing for next MOV instruction
MOV
[R12], R13
;command cycle 4: the EPC starts execution of
;Programming Command
Data_Polling:
EXTS
R11, #1
;use EXTended addressing for next MOV instruction
MOV
R7, [R12]
;read Flash Status register (FSB) in R7
MOV
R6, R7
;save it in R6 register
;Check if FSB.7 = Data.7 (i.e. R7.7 = R13.7)
XOR
R7, R13
JNB
R7.7, Prog_OK
;Check if FSB.5 = 1 (Programming Error)
JNB
R6.5, Data_Polling
;Programming Error: verify is Flash programmed
;data is OK
EXTS
R11, #1
;use EXTended addressing for next MOV instruction
MOV
R7, [R12]
;read Flash Status register (FSB) in R7
;Check if FSB.7 = Data.7
XOR
R7, R13
JNB
R7.7, Prog_OK
;Programming failed: Flash remains in Write
;Operation.
;To go back to normal Read operations, a Read/Reset
;command
;must be performed
Prog_Error:
MOV
R7, #0F0h
;load register R7 with Read/Reset command
EXTS
R11, #1
;use EXTended addressing for next MOV instruction
MOV
[R12], R7
;address is don’t care for Read/Reset command
...
;here place specific Error handling code
...
...
;When programming operation finished succesfully,
;Flash is set back automatically to normal Read Mode
Prog_OK:
....
....
28/160
ST10F269-T3
Example 3 Performing the Block Erase command
We assume that in the initialization phase the lowest 32K Bytes of Flash memory (sector 0) have been
mapped to segment 1.The registers R11/R12 contain an address related to the block to be erased
(segment number in R11, segment offset in R12, for example R11 = 01h, R12= 4000h will erase the block
1 - first 8K byte block).
MOV
R5, #01554h
;load auxilary register R5 with command address
;(used in command cycle 1)
MOV
R6, #02AA8h
;load auxilary register R6 with command address
;(used in command cycle 2)
SXCT DPPO, #08h
;push data page pointer 0 and load it to point ;to
;segment 2
MOV
R7, #0A8h
;load register R7 with 1st CI enable command
MOV
[R5], R7
;command cycle 1
MOV
R7, #054h
;load register R7 with 2cd CI enable command
MOV
[R6], R7
;command cycle 2
MOV
R7, #080h
;load register R7 with Block Erase command
MOV
[R5], R7
;command cycle 3
MOV
R7, #0A8h
;load register R7 with 1st CI enable command
MOV
[R5], R7
;command cycle 4
MOV
R7, #054h
;load register R7 with 2cd CI enable command
MOV
[R6], R7
;command cycle 5
POP
DPP0
;restore DPP0: following addressing to the Flash
;will use EXTended instructions
;R11 contains the segment of the block to be erased
;R12 contains the segment offset address of the
;block to be erased
MOV
R7, #030h
;load register R7 with erase confirm code
EXTS R11, #1
;use EXTended addressing for next MOV instruction
MOV
[R12], R7
;command cycle 6: the EPC starts execution of
;Erasing Command
Erase_Polling:
EXTS R11, #1
;use EXTended addressing for next MOV instruction
MOV
R7, [R12]
;read Flash Status register (FSB) in R7
;Check if FSB.7 = ‘1’ (i.e. R7.7 = ‘1’)
JB
R7.7, Erase_OK
;Check if FSB.5 = 1 (Erasing Error)
JNB
R7.5, Erase_Polling
;Programming failed: Flash remains in Write
;Operation.
;To go back to normal Read operations, a Read/Reset
;command
;must be performed
Erase_Error:
MOV
R7, #0F0h
EXTS R11, #1
MOV
[R12], R7
...
...
...
;load register R7 with Read/Reset command
;use EXTended addressing for next MOV instruction
;address is don’t care for Read/Reset command
;here place specific Error handling code
;When erasing operation finished succesfully,
;Flash is set back automatically to normal Read Mode
Erase_OK:
....
....
29/160
ST10F269-T3
5.6 - Bootstrap Loader
5.6.1 - Entering the Bootstrap Loader
The built-in bootstrap loader (BSL) of the
ST10F269-T3 provides a mechanism to load the
startup program through the serial interface after
reset. In this case, no external memory or internal
Flash memory is required for the initialization
code starting at location 00’0000h (see Figure 5).
The ST10F269-T3 enters BSL mode when pin
P0L.4 is sampled low at the end of a hardware
reset. In this case the built-in bootstrap loader is
activated independent of the selected bus mode.
The bootstrap loader moves code/data into the
internal RAM, but can also transfer data via the
serial interface into an external RAM using a
second level loader routine. Flash Memory
(internal or external) is not necessary, but it may
be used to provide lookup tables or “core-code”
like a set of general purpose subroutines for I/O
operations,
number
crunching,
system
initialization, etc.
The bootstrap loader can be used to load the
complete application software into ROMless
systems, to load temporary software into
complete systems for testing or calibration, or to
load a programming routine for Flash devices.
The BSL mechanism can be used for standard
system startup as well as for special occasions
like system maintenance (firmer update) or
end-of-line programming or testing.
00
00
0
00
The bootstrap loader code is stored in a special
Boot-ROM. No part of the standard mask Memory
or Flash Memory area is required for this.
After entering BSL mode and the respective
initialization the ST10F269-T3 scans the RXD0
line to receive a zero Byte, one start bit, eight ‘0’
data bits and one stop bit.
From the duration of this zero Byte it calculates
the corresponding Baud rate factor with respect to
the current CPU clock, initializes the serial
interface ASC0 accordingly and switches pin
TxD0 to output.
Using this Baud rate, an identification Byte is
returned to the host that provides the loaded data.
This identification Byte identifies the device to
be booted. The identification byte is D5h for
ST10F269-T3.
Figure 5 : Bootstrap Loader Sequence
RSTIN
P0L.4
1)
00
0
4)
2)
RxD0
0000
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
TxD0
3)
5)
CSP:IP
6)
Internal Boot Memory (BSL) routine
1) BSL initialization time
2) Zero Byte (1 start bit, eight ‘0’ data bits, 1 stop bit), sent by host.
3) Identification Byte (D5h), sent by ST10F269-T3.
4) 32 Bytes of code / data, sent by host.
5) Caution: TxD0 is only driven a certain time after reception of the zero Byte.
6) Internal Boot ROM.
30/160
32 Byte user software
ST10F269-T3
When the ST10F269-T3 has entered BSL mode, the following configuration is automatically set (values
that deviate from the normal reset values, are marked):
Watchdog Timer:
Disabled
Register SYSCON:
0E00h
Context Pointer CP:
FA00h
Register STKUN:
FA40h
Stack Pointer SP:
FA40h
Register STKOV:
FA0Ch 0<->C
Register S0CON:
8011h
Register BUSCON0:
acc. to startup configuration
P3.10 / TXD0:
‘1’
Register S0BG:
Acc. to ‘00’ Byte
DP3.10:
‘1’
In this case, the watchdog timer is disabled, so the
bootstrap loading sequence is not time limited.
Pin TXD0 is configured as output, so the
ST10F269-T3 can return the identification Byte.
Even if the internal Flash is enabled, no code can
be executed out of it.
The hardware that activates the BSL during reset
may be a simple pull-down resistor on P0L.4 for
systems that use this feature upon every
hardware reset.
A switchable solution (via jumper or an external
signal) can be used for systems that
only temporarily use the bootstrap loader (see
Figure 6).
After sending the identification Byte the
ASC0 receiver is enabled and is ready to
receive the initial 32 Bytes from the host. A half
duplex connection is therefore sufficient to feed
the BSL.
5.6.2 - Memory Configuration After Reset
The configuration (and the accessibility) of the
ST10F269-T3’s memory areas after reset in
Bootstrap-Loader mode differs from the standard
case. Pin EA is not evaluated when BSL mode is
selected, and accesses to the internal Flash area
are partly redirected, while the ST10F269-T3 is in
BSL mode (see Figure 7). All code fetches are
made from the special Boot-ROM, while data
accesses read from the internal user Flash. Data
accesses will return undefined values on
ROMless devices.
The code in the Boot-ROM is not an invariant
feature of the ST10F269-T3. User software
should not try to execute code from the internal
Flash area while the BSL mode is still active, as
these fetches will be redirected to the Boot-ROM.
The Boot-ROM will also “move” to segment 1,
when the internal Flash area is mapped to
segment 1 (see Figure 7).
Figure 6 : Hardware Provisions to Activate the BSL
External
Signal
POL.4
POL.4
Normal Boot
BSL
RPOL.4
8kΩ
RPOL.4
8kΩ
Circuit 2
Circuit 1
31/160
ST10F269-T3
Figure 7 : Memory Configuration after Reset
16M Bytes
Access to:
Segment
255
16M Bytes
255
external
bus
disabled
2
1
255
external
bus
enabled
2
1
0
depends on
reset config
EA, Port0
2
1
IRAM
IRAM
IRAM
0
internal
Flash
Flash enabled
User
Test
Flash
BSL mode active
Access to:
Segment
16M Bytes
Access:
Segment
internal
Flash
Flash enabled
User
Test
Flash
0
User
Flash
depends on
reset config
EA, Port0
Yes (P0L.4=’0’)
Yes (P0L.4=’0’)
No (P0L.4=’1’)
High
Low
Access to application
Code fetch from internal
Flash area
Test-Flash access
Test-Flash access
User Flash access
Data fetch from internal
Flash area
User Flash access
User Flash access
User Flash access
EA pin
5.6.3 - Loading the Startup Code
After sending the identification Byte the BSL
enters a loop to receive 32 Bytes via ASC0. These
Byte are stored sequentially into locations
00’FA40h through 00’FA5Fh of the internal RAM.
So up to 16 instructions may be placed into the
RAM area. To execute the loaded code the BSL
then jumps to location 00’FA40h, which is the first
loaded instruction.
The bootstrap loading sequence is now
terminated, the ST10F269-T3 remains in BSL
mode, however. Most probably the initially loaded
routine will load additional code or data, as an
average application is likely to require
substantially more than 16 instructions. This
second receive loop may directly use the
pre-initialized interface ASC0 to receive data and
store it to arbitrary user-defined locations.
This second level of loaded code may be the final
application code. It may also be another, more
sophisticated, loader routine that adds a
transmission protocol to enhance the integrity of
the loaded code or data. It may also contain a
code sequence to change the system
configuration and enable the bus interface to store
the received data into external memory.
32/160
This process may go through several iterations or
may directly execute the final application. In all
cases the ST10F269-T3 will still run in BSL mode,
that means with the watchdog timer disabled and
limited access to the internal Flash area.
All code fetches from the internal Flash area
(00’0000h...00’7FFFh or 01’0000h...01’7FFFh, if
mapped to segment 1) are redirected to the
special Boot-ROM. Data fetches access will
access the internal Boot-ROM of the
ST10F269-T3, if any is available, but will return
undefined data on ROMless devices.
5.6.4 - Exiting Bootstrap Loader Mode
In order to execute a program in normal mode, the
BSL mode must be terminated first. The
ST10F269-T3 exits BSL mode upon a software
reset (ignores the level on P0L.4) or a hardware
reset (P0L.4 must be high). After a reset the
ST10F269-T3 will start executing from location
00’0000h of the internal Flash or the external
memory, as programmed via pin EA.
ST10F269-T3
5.6.5 - Choosing the Baud Rate for the BSL
The calculation of the serial Baud rate for ASC0
from the length of the first zero Byte that is
received, allows the operation of the bootstrap
loader of the ST10F269-T3 with a wide range of
Baud rates. However, the upper and lower limits
have to be kept, in order to insure proper data
transfer.
BST10F269-T3 =
f CPU
----------------------------------------------32 × ( S0BRL + 1 )
The ST10F269-T3 uses timer T6 to measure the
length of the initial zero Byte. The quantization
uncertainty of this measurement implies the first
deviation from the real Baud rate, the next
deviation is implied by the computation of the
S0BRL reload value from the timer contents. The
formula below shows the association:
– 36
S0BRL = T6
-------------------72
9
, T6 = --- ×
4
f CPU
----------------B
Host
For a correct data transfer from the host to the
ST10F269-T3 the maximum deviation between
the internal initialized Baud rate for ASC0 and the
real Baud rate of the host should be below 2.5%.
The deviation (FB, in percent) between host Baud
rate and ST10F269-T3 Baud rate can be
calculated via the formula below:
B
–B
C ontr
Ho st- × 100 %
F B = ------------------------------------------,
B C ontr
F ≤ 2.5 %
B
Note: Function (FB) does not consider the
tolerances of oscillators and other devices
supporting the serial communication.
This Baud rate deviation is a nonlinear function
depending on the CPU clock and the Baud rate of
the host. The maxima of the function (FB)
increase with the host Baud rate due to the
smaller Baud rate pre-scaler factors and the
implied higher quantization error (see Figure 8).
The minimum Baud rate (BLow in the Figure 8) is
determined by the maximum count capacity of
timer T6, when measuring the zero Byte, and it
depends on the CPU clock. Using the maximum
T6 count 216 in the formula the minimum Baud
rate can be calculated. The lowest standard Baud
rate in this case would be 1200 Baud. Baud rates
below BLow would cause T6 to overflow. In this
case ASC0 cannot be initialized properly.
The maximum Baud rate (BHigh in the Figure 8)
is the highest Baud rate where the deviation still
does not exceed the limit, so all Baud rates
between BLow and BHigh are below the deviation
limit. The maximum standard Baud rate that fulfills
this requirement is 19200 Baud.
Higher Baud rates, however, may be used as
long as the actual deviation does not exceed the
limit. A certain Baud rate (marked ’I’ in Figure 8)
may violate the deviation limit, while an even
higher Baud rate (marked ’II’ in Figure 8) stays
very well below it. This depends on the host
interface.
Figure 8 : Baud Rate Deviation Between Host and ST10F269-T3
I
FB
2.5%
BLow
BHigh
BHOST
II
33/160
ST10F269-T3
6 - CENTRAL PROCESSING UNIT (CPU)
The CPU uses a bank of 16 word registers to run
the current context. This bank of General Purpose
Registers (GPR) is physically stored within the
on-chip Internal RAM (IRAM) area. A Context
Pointer (CP) register determines the base
address of the active register bank to be accessed
by the CPU.
The number of register banks is only restricted by
the available Internal RAM space. For easy
parameter passing, a register bank may overlap
others.
A system stack of up to 1024 bytes is provided as
a storage for temporary data. The system stack is
allocated in the on-chip RAM area, and it is
accessed by the CPU via the stack pointer (SP)
register.
Two separate SFRs, STKOV and STKUN, are
implicitly compared against the stack pointer
value upon each stack access for the detection of
a stack overflow or underflow.
The CPU includes a 4-stage instruction pipeline, a
16-bit arithmetic and logic unit (ALU) and dedicated SFRs. Additional hardware has been added
for a separate multiply and divide unit, a bit-mask
generator and a barrel shifter.
Most of the ST10F269-T3’s instructions can be
executed in one instruction cycle which requires
62.5ns at 32MHz CPU clock. For example, shift
and rotate instructions are processed in one
instruction cycle independent of the number of
bits to be shifted.
Multiple-cycle instructions have been optimized:
branches are carried out in 2 cycles, 16 x 16-bit
multiplication in 5 cycles and a 32/16-bit division
in 10 cycles.
The jump cache reduces the execution time of
repeatedly performed jumps in a loop, from
2 cycles to 1 cycle.
Figure 9 : CPU Block Diagram (MAC Unit not included)
16
CPU
SP
STKOV
STKUN
256K Byte
Exec. Unit
Instr. Ptr
4-Stage
Pipeline
Flash
memory
32
PSW
SYSCON
BUSCON 0
BUSCON 1
BUSCON 2
BUSCON 3
BUSCON 4
Data Pg. Ptrs
34/160
MDH
MDL
2K Byte
Internal
RAM
R15
Mul./Div.-HW
Bit-Mask Gen.
ALU
Bank
n
General
Purpose
Registers
16-Bit
Barrel-Shift
CP
ADDRSEL 1
ADDRSEL 2
ADDRSEL 3
ADDRSEL 4
Code Seg. Ptr.
R0
Bank
i
16
Bank
0
ST10F269-T3
The System Configuration Register SYSCON
This bit-addressable register provides general system configuration and control functions. The reset
value for register SYSCON depends on the state of the PORT0 pins during reset.
SYSCON (FF12h / 89h)
15
14
13
SFR
Reset Value: 0xx0h
12
11
10
9
8
7
6
5
4
3
2
1
0
STKSZ
ROM
S1
SGT
DIS
ROM
EN
BYT
DIS
CLK
EN
WR
CFG
CS
CFG
PWD
CFG
OWD
DIS
BDR
STEN
XPEN
VISI
BLE
XPERSHARE
RW
RW
RW
RW1
RW1
RW
RW1
RW
RW
RW
RW
RW
RW
RW
Notes: 1. These bits are set directly or indirectly according to PORT0 and EA pin configuration during reset sequence.
2. Register SYSCON cannot be changed after execution of the EINIT instruction.
Bit
Function
XPEN
XBUS Peripheral Enable Bit
0
Accesses to the on-chip X-Peripherals and their functions are disabled
1
The on-chip X-Peripherals are enabled and can be accessed.
Bidirectional Reset Enable
BDRSTEN
0
RSTIN pin is an input pin only. SW Reset or WDT Reset have no effect on this pin
1
RSTIN pin is a bidirectional pin. This pin is pulled low during 1024 TCL during reset sequence.
OWDDIS
Oscillator Watchdog Disable Control
0
Oscillator Watchdog (OWD) is enabled. If PLL is bypassed, the OWD monitors XTAL1 activity. If
there is no activity on XTAL1 for at least 1 µs, the CPU clock is switched automatically to PLL’s
base frequency (2 to 10MHz).
1
OWD is disabled. If the PLL is bypassed, the CPU clock is always driven by XTAL1 signal. The
PLL is turned off to reduce power supply current.
PWDCFG
Power Down Mode Configuration Control
0
Power Down Mode can only be entered during PWRDN instruction execution if NMI pin is low, otherwise the instruction has no effect. To exit Power Down Mode, an external reset must occurs by
asserting the RSTIN pin.
1
Power Down Mode can only be entered during PWRDN instruction execution if all enabled fast
external interrupt EXxIN pins are in their inactive level. Exiting this mode can be done by asserting
one enabled EXxIN pin.
CSCFG
Chip Select Configuration Control
0
Latched Chip Select lines: CSx change 1 TCL after rising edge of ALE
1
Unlatched Chip Select lines: CSx change with rising edge of ALE
6.1 - Multiplier-accumulator Unit (MAC)
The MAC co-processor is a specialized co-processor added to the ST10 CPU Core in order to
improve the performances of the ST10 Family in
signal processing algorithms.
Signal processing needs at least three specialized
units operating in parallel to achieve maximum
performance:
– A Multiply-Accumulate Unit,
– An Address Generation Unit, able to feed the
MAC Unit with 2 operands per cycle,
– A Repeat Unit, to execute series of multiply-accumulate instructions.
The existing ST10 CPU has been modified to
include new addressing capabilities which enable
the CPU to supply the new co-processor with up
to 2 operands per instruction cycle.
This new co-processor (so-called MAC) contains
a fast multiply-accumulate unit and a repeat unit.
The co-processor instructions extend the ST10
CPU instruction set with multiply, multiply-accumulate, 32-bit signed arithmetic operations.
A new transfer instruction CoMOV has also been
added to take benefit of the new addressing capabilities.
35/160
ST10F269-T3
6.1.1 - Features
6.1.1.1 - Enhanced Addressing Capabilities
– New addressing modes including a double indirect addressing mode with pointer post-modification.
– Parallel Data Move: this mechanism allows one
operand move during Multiply-Accumulate instructions without penalty.
– New transfer instructions CoSTORE (for fast access to the MAC SFRs) and CoMOV (for fast
memory to memory table transfer).
6.1.1.2 - Multiply-Accumulate Unit
– One-cycle execution for all MAC operations.
– 16 x 16-bit signed/unsigned parallel multiplier.
– 40-bit signed arithmetic unit with automatic saturation mode.
– 40-bit accumulator.
– 8-bit left/right shifter.
– Full instruction set with multiply and multiply-accumulate, 32-bit signed arithmetic and compare
instructions.
6.1.1.3 - Program Control
– Repeat Unit: allows some MAC co-processor instructions to be repeated up to 8192 times. Repeated instructions may be interrupted.
– MAC interrupt (Class B Trap) on MAC condition
flags.
Figure 10 : MAC Unit Architecture
Operand 1
16
GPR Pointers *
Operand 2
16
IDX0 Pointer
IDX1 Pointer
QR0 GPR Offset Register
QR1 GPR Offset Register
QX0 IDX Offset Register
QX1 IDX Offset Register
16 x 16
signed/unsigned
Multiplier
Concatenation
32
32
Mux
Sign Extend
MRW
Scaler
0h
40
Repeat Unit
Interrupt
Controller
08000h
40 40
0h
Mux
Mux
40
40
MCW
A
B
40-bit Signed Arithmetic Unit
ST10 CPU
MSW
Flags MAE
40
MAH
Control Unit
40
8-bit Left/Right
Shifter
Note: * Shared with standard ALU.
36/160
40
40
MAL
ST10F269-T3
6.2 - Instruction Set Summary
The Table 4 lists the instructions of the ST10F269-T3. The various addressing modes, instruction operation, parameters for conditional execution of instructions, opcodes and a detailed description of each
instruction can be found in the “ST10 Family Programming Manual”.
Table 4 : Instruction Set Summary
Mnemonic
Description
Bytes
ADD(B)
Add word (byte) operands
2/4
ADDC(B)
Add word (byte) operands with Carry
2/4
SUB(B)
Subtract word (byte) operands
2/4
SUBC(B)
Subtract word (byte) operands with Carry
2/4
MUL(U)
(Un)Signed multiply direct GPR by direct GPR (16-16-bit)
2
DIV(U)
(Un)Signed divide register MDL by direct GPR (16-/16-bit)
2
DIVL(U)
(Un)Signed long divide reg. MD by direct GPR (32-/16-bit)
2
CPL(B)
Complement direct word (byte) GPR
2
NEG(B)
Negate direct word (byte) GPR
2
AND(B)
Bit-wise AND, (word/byte operands)
2/4
OR(B)
Bit-wise OR, (word/byte operands)
2/4
XOR(B)
Bit-wise XOR, (word/byte operands)
2/4
BCLR
Clear direct bit
2
BSET
Set direct bit
2
BMOV(N)
Move (negated) direct bit to direct bit
4
BAND, BOR, BXOR
AND/OR/XOR direct bit with direct bit
4
BCMP
Compare direct bit to direct bit
4
BFLDH/L
Bit-wise modify masked high/low byte of bit-addressable direct word memory
with immediate data
4
CMP(B)
Compare word (byte) operands
2/4
CMPD1/2
Compare word data to GPR and decrement GPR by 1/2
2/4
CMPI1/2
Compare word data to GPR and increment GPR by 1/2
2/4
PRIOR
Determine number of shift cycles to normalize direct word GPR and store result
in direct word GPR
2
SHL / SHR
Shift left/right direct word GPR
2
ROL / ROR
Rotate left/right direct word GPR
2
ASHR
Arithmetic (sign bit) shift right direct word GPR
2
MOV(B)
Move word (byte) data
2/4
MOVBS
Move byte operand to word operand with sign extension
2/4
MOVBZ
Move byte operand to word operand with zero extension
2/4
JMPA, JMPI, JMPR
Jump absolute/indirect/relative if condition is met
4
JMPS
Jump absolute to a code segment
4
J(N)B
Jump relative if direct bit is (not) set
4
JBC
Jump relative and clear bit if direct bit is set
4
37/160
ST10F269-T3
Table 4 : Instruction Set Summary
Mnemonic
Description
Bytes
JNBS
Jump relative and set bit if direct bit is not set
4
CALLA, CALLI, CALLR
Call absolute/indirect/relative subroutine if condition is met
4
CALLS
Call absolute subroutine in any code segment
4
PCALL
Push direct word register onto system stack and call absolute subroutine
4
TRAP
Call interrupt service routine via immediate trap number
2
PUSH, POP
Push/pop direct word register onto/from system stack
2
SCXT
Push direct word register onto system stack and update register with word
operand
4
RET
Return from intra-segment subroutine
2
RETS
Return from inter-segment subroutine
2
RETP
Return from intra-segment subroutine and pop direct
word register from system stack
2
RETI
Return from interrupt service subroutine
2
SRST
Software Reset
4
IDLE
Enter Idle Mode
4
PWRDN
Enter Power Down Mode (supposes NMI-pin being low)
4
SRVWDT
Service Watchdog Timer
4
DISWDT
Disable Watchdog Timer
4
EINIT
Signify End-of-Initialization on RSTOUT-pin
4
ATOMIC
Begin ATOMIC sequence
2
EXTR
Begin EXTended Register sequence
2
EXTP(R)
Begin EXTended Page (and Register) sequence
2/4
EXTS(R)
Begin EXTended Segment (and Register) sequence
2/4
NOP
Null operation
6.3 - MAC Coprocessor Specific Instructions
The following table gives an overview of the MAC
instruction set. All the mnemonics are listed with
the addressing modes that can be used with each
instruction.
For each combination of mnemonic and addressing mode this table indicates if it is repeatable or
not.
New addressing capabilities enable the CPU to
supply the MAC with up to 2 operands per instruction cycle. MAC instructions: multiply, multiply-accumulate, 32-bit signed arithmetic operations
and the CoMOV transfer instruction have been
38/160
2
added to the standard instruction set. Full details
are provided in the ‘ST10 Family Programming
Manual’. Double indirect addressing requires two
pointers. Any GPR can be used for one pointer, the
other pointer is provided by one of two specific
SFRs IDX0 and IDX1. Two pairs of offset registers
QR0/QR1 and QX0/QX1 are associated with each
pointer (GPR or IDXi).
The GPR pointer allows access to the entire
memory space, but IDXi are limited to the internal
Dual-Port RAM, except for the CoMOV instruction.
ST10F269-T3
Mnemonic
Addressing Modes
Repeatability
CoMUL
CoMULu
CoMULus
CoMULsu
CoMULCoMULuCoMULusCoMULsu-
Rwn, Rwm
[IDXi⊗], [Rwm⊗]
Rwn, [Rwm⊗]
No
No
No
Rwn, Rwm
[IDXi⊗], [Rwm⊗]
Rwn, [Rwm⊗]
No
Yes
Yes
Rwn, Rwm
[IDXi⊗], [Rwn⊗]
Rwn, [RWm⊗]
No
No
No
[Rwm⊗]
Yes
[IDXi⊗]
Yes
[IDXi⊗], [Rwm⊗]
Yes
-
No
Rwn, CoReg
No
[Rwn⊗], Coreg
Yes
[IDXi⊗], [Rwm⊗]
Yes
CoMUL, rnd
CoMULu, rnd
CoMULus, rnd
CoMULsu, rnd
CoMAC
CoMACu
CoMACus
CoMACsu
CoMACCoMACuCoMACusCoMACsuCoMAC, rnd
CoMACu, rnd
CoMACus, rnd
CoMACsu, rnd
CoMACR
CoMACRu
CoMACRus
CoMACRsu
CoMACR, rnd
CoMACRu, rnd
CoMACRus, rnd
CoMACRsu, rnd
CoNOP
CoNEG
CoNEG, rnd
CoRND
CoSTORE
CoMOV
39/160
ST10F269-T3
Mnemonic
Addressing Modes
Repeatability
CoMACM
CoMACMu
CoMACMus
CoMACMsu
CoMACMCoMACMuCoMACMusCoMACMsuCoMACM, rnd
CoMACMu, rnd
CoMACMus, rnd
[IDXi⊗], [Rwm⊗]
Yes
Rwn, Rwm
[IDXi⊗], [Rwm⊗]
Rwn, [Rwm⊗]
No
Yes
Yes
Rwn, Rwm
[IDXi⊗], [Rwm⊗]
Rwn, [Rwm⊗]
No
No
Rwm
#data4
[Rwm⊗]
Yes
No
Yes
Rwn, Rwm
[IDXi⊗], [Rwm⊗]
Rwn, [Rwm⊗]
No
No
No
CoMACMsu, rnd
CoMACMR
CoMACMRu
CoMACMRus
CoMACMRsu
CoMACMR, rnd
CoMACMRu, rnd
CoMACMRus, rnd
CoMACMRsu, rnd
CoADD
CoADD2
CoSUB
CoSUB2
CoSUBR
CoSUB2R
CoMAX
CoMIN
CoLOAD
CoLOADCoLOAD2
CoLOAD2-
No
CoCMP
CoSHL
CoSHR
CoASHR
CoASHR, rnd
CoABS
40/160
ST10F269-T3
The Table 5 shows the various combinations of pointer post-modification for each of these 2 new addressing modes. In this document the symbols “[Rwn⊗]” and “[IDXi⊗]” refer to these addressing modes.
Table 5 : Pointer Post-modification Combinations for IDXi and Rwn
Symbol
“[IDXi⊗]” stands for
“[Rwn⊗]” stands for
Mnemonic
Address Pointer Operation
[IDXi]
(IDXi) ← (IDXi)
[IDXi+]
(IDXi) ← (IDXi) + 2
(i=0,1)
[IDXi-]
(IDXi) ← (IDXi) - 2
(i=0,1)
[IDXi + QXj]
(IDXi) ← (IDXi) + (QXj)
(i, j =0,1)
[IDXi - QXj]
(IDXi) ← (IDXi) - (QXj)
(i, j =0,1)
[Rwn]
(Rwn) ← (Rwn)
(no-op)
[Rwn+]
(Rwn) ← (Rwn) + 2
(n=0-15)
[Rwn-]
(Rwn) ← (Rwn) - 2
(n=0-15)
[Rwn + QRj]
(Rwn) ← (Rwn) + (QRj)
(n=0-15; j =0,1)
[Rwn - QRj]
(Rwn) ← (Rwn) - (QRj)
(n=0-15; j =0,1)
(no-op)
Table 6 : MAC Registers Referenced as ‘CoReg‘
Registers
Description
Address in Opcode
MSW
MAC-Unit Status Word
00000b
MAH
MAC-Unit Accumulator High
00001b
MAS
“limited” MAH /signed
00010b
MAL
MAC-Unit Accumulator Low
00100b
MCW
MAC-Unit Control Word
00101b
MRW
MAC-Unit Repeat Word
00110b
41/160
ST10F269-T3
7 - EXTERNAL BUS CONTROLLER
All of the external memory accesses are
performed by the on-chip external bus controller.
The EBC can be programmed to single chip mode
when no external memory is required, or to one of
four different external memory access modes:
– 16- / 18- / 20- / 24-bit addresses and 16-bit data,
demultiplexed
– 16- / 18- / 20- / 24-bit addresses and 16-bit data,
multiplexed
– 16- / 18- / 20- / 24-bit addresses and 8-bit data,
multiplexed
– 16- / 18- / 20- / 24-bit addresses and 8-bit data,
demultiplexed
In demultiplexed bus modes addresses are output
on PORT1 and data is input / output on PORT0 or
P0L, respectively. In the multiplexed bus modes
both addresses and data use PORT0 for input /
output.
Timing characteristics of the external bus
interface (memory cycle time, memory tri-state
time, length of ALE and read / write delay) are
programmable giving the choice of a wide range
of memories and external peripherals.
Up to 4 independent address windows may be
defined (using register pairs ADDRSELx /
BUSCONx) to access different resources and bus
characteristics.
These
address
windows
are
arranged
hierarchically
where
BUSCON4
overrides
BUSCON3 and BUSCON2 overrides BUSCON1.
All accesses to locations not covered by these 4
address windows are controlled by BUSCON0.
Up to 5 external CS signals (4 windows plus
default) can be generated in order to save
external glue logic. Access to very slow memories
is supported by a ‘Ready’ function.
A HOLD / HLDA protocol is available for bus
arbitration which shares external resources with
other bus masters.
The bus arbitration is enabled by setting bit
HLDEN in register PSW. After setting HLDEN
once, pins P6.7...P6.5 (BREQ, HLDA, HOLD) are
automatically controlled by the EBC. In master
mode (default after reset) the HLDA pin is an
output. By setting bit DP6.7 to’1’ the slave mode is
selected where pin HLDA is switched to input.
This directly connects the slave controller to
another master controller without glue logic.
42/160
For applications which require less external
memory space, the address space can be
restricted to 1M Byte, 256K Bytes or to 64K Bytes.
Port 4 outputs all 8 address lines if an address
space of 16M Bytes is used, otherwise four, two or
no address lines.
Chip select timing can be made programmable.
By default (after reset), the CSx lines change half
a CPU clock cycle after the rising edge of ALE.
With the CSCFG bit set in the SYSCON register
the CSx lines change with the rising edge of ALE.
The active level of the READY pin can be set by bit
RDYPOL in the BUSCONx registers. When the
READY function is enabled for a specific address
window, each bus cycle within the window must
be terminated with the active level defined by bit
RDYPOL in the associated BUSCON register.
7.1 - Programmable Chip Select Timing
Control
The ST10F269-T6 allows the user to adjust the
position of the CSx line changes. By default (after
reset), the CSx lines change half a CPU clock
cycle (31.25ns at 32MHz of CPU clock) after the
rising edge of ALE. With the CSCFG bit set in the
SYSCON register the CSx lines change with the
rising edge of ALE, thus the CSx lines and the
address lines change at the same time (see
Figure 11).
7.2 - READY Programmable Polarity
The active level of the READY pin can be selected
by software via the RDYPOL bit in the BUSCONx
registers.
When the READY function is enabled for a
specific address window, each bus cycle within
this window must be terminated with the active
level defined by this RDYPOL bit in the associated
BUSCON register.
BUSCONx registers are described in Section 20.2
- System Configuration Registers.
Note
ST10F269-T3 as no
resistor on READY pin.
internal
pull-up
ST10F269-T3
Figure 11 : Chip Select Delay
Normal Demultiplexed
Segment (P4)
ALE Lengthen Demultiplexed
Bus Cycle
Bus Cycle
Address (P1)
ALE
Normal CSx
Unlatched CSx
Data
Data
BUS (P0)
RD
Data
BUS (P0)
Data
WR
Read/Write
Read/Write
Delay
Delay
43/160
ST10F269-T3
8 - INTERRUPT SYSTEM
The interrupt response time for internal program
execution is from 156.25ns to 375ns at 32MHz
CPU clock.
The ST10F269-T6 architecture supports several
mechanisms for fast and flexible response to
service requests that can be generated from
various sources (internal or external) to the
microcontroller. Any of these interrupt requests
can be serviced by the Interrupt Controller or by
the Peripheral Event Controller (PEC).
In contrast to a standard interrupt service where
the current program execution is suspended and a
branch to the interrupt vector table is performed,
just one cycle is ‘stolen’ from the current CPU
activity to perform a PEC service. A PEC service
implies a single Byte or Word data transfer
between any two memory locations with an
additional increment of either the PEC source or
destination pointer. An individual PEC transfer
counter is implicitly decremented for each PEC
service except when performing in the continuous
transfer mode. When this counter reaches zero, a
standard interrupt is performed to the
corresponding source related vector location.
PEC services are very well suited to perform the
transmission or the reception of blocks of data.
The ST10F269-T3 has 8 PEC channels, each of
them offers such fast interrupt-driven data transfer
capabilities.
EXISEL (F1DAh / EDh)
15
14
13
12
An interrupt control register which contains an
interrupt request flag, an interrupt enable flag and
an interrupt priority bit-field is dedicated to each
existing interrupt source. Thanks to its related
register, each source can be programmed to one
of sixteen interrupt priority levels. Once starting to
be processed by the CPU, an interrupt service
can only be interrupted by a higher prioritized
service request. For the standard interrupt
processing, each of the possible interrupt sources
has a dedicated vector location.
Software interrupts are supported by means of the
‘TRAP’ instruction in combination with an
individual trap (interrupt) number.
8.1 - External Interrupts
Fast external interrupt inputs are provided to
service external interrupts with high precision
requirements. These fast interrupt inputs feature
programmable edge detection (rising edge, falling
edge or both edges).
Fast external interrupts may also have interrupt
sources selected from other peripherals; for
example the CANx controller receive signal
(CANx_RxD) can be used to interrupt the system.
This new function is controlled using the ‘External
Interrupt Source Selection’ register EXISEL.
ESFR
11
10
9
8
Reset Value: 0000h
7
6
5
4
3
2
1
0
EXI7SS
EXI6SS
EXI5SS
EXI4SS
EXI3SS
EXI2SS
EXI1SS
EXI0SS
RW
RW
RW
RW
RW
RW
RW
RW
EXIxSS
44/160
External Interrupt x Source Selection (x=7...0)
‘00’: Input from associated Port 2 pin.
‘01’: Input from “alternate source”.
‘10’: Input from Port 2 pin ORed with “alternate source”.
‘11’: Input from Port 2 pin ANDed with “alternate source”.
EXIxSS
Port 2 pin
Alternate Source
0
P2.8
CAN1_RxD
1
P2.9
CAN2_RxD
2
P2.10
RTCSI (Timed)
3
P2.11
RTCAI (Alarm)
4...7
P2.12...15
Not used (zero)
ST10F269-T3
8.2 - Interrupt Registers and Vectors Location List
Table 7 shows all the available ST10F269-T3 interrupt sources and the corresponding hardware-related
interrupt flags, vectors, vector locations and trap (interrupt) numbers:
Table 7 : Interrupt Sources
Source of Interrupt or PEC
Service Request
Request
Flag
Enable
Flag
Interrupt
Vector
Vector
Location
Trap
Number
CAPCOM Register 0
CC0IR
CC0IE
CC0INT
00’0040h
10h
CAPCOM Register 1
CC1IR
CC1IE
CC1INT
00’0044h
11h
CAPCOM Register 2
CC2IR
CC2IE
CC2INT
00’0048h
12h
CAPCOM Register 3
CC3IR
CC3IE
CC3INT
00’004Ch
13h
CAPCOM Register 4
CC4IR
CC4IE
CC4INT
00’0050h
14h
CAPCOM Register 5
CC5IR
CC5IE
CC5INT
00’0054h
15h
CAPCOM Register 6
CC6IR
CC6IE
CC6INT
00’0058h
16h
CAPCOM Register 7
CC7IR
CC7IE
CC7INT
00’005Ch
17h
CAPCOM Register 8
CC8IR
CC8IE
CC8INT
00’0060h
18h
CAPCOM Register 9
CC9IR
CC9IE
CC9INT
00’0064h
19h
CAPCOM Register 10
CC10IR
CC10IE
CC10INT
00’0068h
1Ah
CAPCOM Register 11
CC11IR
CC11IE
CC11INT
00’006Ch
1Bh
CAPCOM Register 12
CC12IR
CC12IE
CC12INT
00’0070h
1Ch
CAPCOM Register 13
CC13IR
CC13IE
CC13INT
00’0074h
1Dh
CAPCOM Register 14
CC14IR
CC14IE
CC14INT
00’0078h
1Eh
CAPCOM Register 15
CC15IR
CC15IE
CC15INT
00’007Ch
1Fh
CAPCOM Register 16
CC16IR
CC16IE
CC16INT
00’00C0h
30h
CAPCOM Register 17
CC17IR
CC17IE
CC17INT
00’00C4h
31h
CAPCOM Register 18
CC18IR
CC18IE
CC18INT
00’00C8h
32h
CAPCOM Register 19
CC19IR
CC19IE
CC19INT
00’00CCh
33h
CAPCOM Register 20
CC20IR
CC20IE
CC20INT
00’00D0h
34h
CAPCOM Register 21
CC21IR
CC21IE
CC21INT
00’00D4h
35h
CAPCOM Register 22
CC22IR
CC22IE
CC22INT
00’00D8h
36h
CAPCOM Register 23
CC23IR
CC23IE
CC23INT
00’00DCh
37h
CAPCOM Register 24
CC24IR
CC24IE
CC24INT
00’00E0h
38h
CAPCOM Register 25
CC25IR
CC25IE
CC25INT
00’00E4h
39h
CAPCOM Register 26
CC26IR
CC26IE
CC26INT
00’00E8h
3Ah
CAPCOM Register 27
CC27IR
CC27IE
CC27INT
00’00ECh
3Bh
CAPCOM Register 28
CC28IR
CC28IE
CC28INT
00’00F0h
3Ch
CAPCOM Register 29
CC29IR
CC29IE
CC29INT
00’0110h
44h
CAPCOM Register 30
CC30IR
CC30IE
CC30INT
00’0114h
45h
CAPCOM Register 31
CC31IR
CC31IE
CC31INT
00’0118h
46h
T0IR
T0IE
T0INT
00’0080h
20h
CAPCOM Timer 0
45/160
ST10F269-T3
Table 7 : Interrupt Sources (continued)
Source of Interrupt or PEC
Service Request
Request
Flag
Enable
Flag
Interrupt
Vector
Vector
Location
Trap
Number
CAPCOM Timer 1
T1IR
T1IE
T1INT
00’0084h
21h
CAPCOM Timer 7
T7IR
T7IE
T7INT
00’00F4h
3Dh
CAPCOM Timer 8
T8IR
T8IE
T8INT
00’00F8h
3Eh
GPT1 Timer 2
T2IR
T2IE
T2INT
00’0088h
22h
GPT1 Timer 3
T3IR
T3IE
T3INT
00’008Ch
23h
GPT1 Timer 4
T4IR
T4IE
T4INT
00’0090h
24h
GPT2 Timer 5
T5IR
T5IE
T5INT
00’0094h
25h
GPT2 Timer 6
T6IR
T6IE
T6INT
00’0098h
26h
GPT2 CAPREL Register
CRIR
CRIE
CRINT
00’009Ch
27h
A/D Conversion Complete
ADCIR
ADCIE
ADCINT
00’00A0h
28h
A/D Overrun Error
ADEIR
ADEIE
ADEINT
00’00A4h
29h
ASC0 Transmit
S0TIR
S0TIE
S0TINT
00’00A8h
2Ah
ASC0 Transmit Buffer
S0TBIR
S0TBIE
S0TBINT
00’011Ch
47h
ASC0 Receive
S0RIR
S0RIE
S0RINT
00’00ACh
2Bh
ASC0 Error
S0EIR
S0EIE
S0EINT
00’00B0h
2Ch
SSC Transmit
SCTIR
SCTIE
SCTINT
00’00B4h
2Dh
SSC Receive
SCRIR
SCRIE
SCRINT
00’00B8h
2Eh
SSC Error
SCEIR
SCEIE
SCEINT
00’00BCh
2Fh
PWM Channel 0...3
PWMIR
PWMIE
PWMINT
00’00FCh
3Fh
CAN1 Interface
XP0IR
XP0IE
XP0INT
00’0100h
40h
CAN2 Interface
XP1IR
XP1IE
XP1INT
00’0104h
41h
FLASH Ready / Busy
XP2IR
XP2IE
XP2INT
00’0108h
42h
PLL Unlock/OWD
XP3IR
XP3IE
XP3INT
00’010Ch
43h
Hardware traps are exceptions or error conditions
that arise during run-time. They cause immediate
non-maskable system reaction similar to a
standard interrupt service (branching to a
dedicated vector table location).
The occurrence of a hardware trap is additionally
signified by an individual bit in the trap flag
register (TFR). Except when another higher
prioritized trap service is in progress, a hardware
trap will interrupt any other program execution.
Hardware trap services cannot not be interrupted
by standard interrupt or by PEC interrupts.
required during one round of prioritization, the
upper 8 bits of the respective register are
reserved. All interrupt control registers are bit
addressable and all bits can be read or written via
software.
This allows each interrupt source to be
programmed or modified with just one instruction.
When accessing interrupt control registers
through instructions which operate on Word data
types, their upper 8 bits (15...8) will return zeros,
when read, and will discard written data.
8.3 - Interrupt Control Registers
All interrupt control registers are identically
organized. The lower 8 bits of an interrupt control
register contain the complete interrupt status
information of the associated source, which is
46/160
The layout of the Interrupt Control registers shown
below applies to each xxIC register, where xx
stands for the mnemonic for the respective
source.
ST10F269-T3
xxIC (yyyyh / zzh)
SFR Area
Reset Value: - - 00h
15
14
13
12
11
10
9
8
7
6
-
-
-
-
-
-
-
-
xxIR
xxIE
ILVL
GLVL
RW
RW
RW
RW
Bit
5
4
3
2
1
0
Function
GLVL
Group Level
Defines the internal order for simultaneous requests of the same priority.
3: Highest group priority
0: Lowest group priority
ILVL
Interrupt Priority Level
Defines the priority level for the arbitration of requests.
Fh: Highest priority level
0h: Lowest priority level
xxIE
Interrupt Enable Control Bit (individually enables/disables a specific source)
‘0’: Interrupt Request is disabled
‘1’: Interrupt Request is enabled
xxIR
Interrupt Request Flag
‘0’: No request pending
‘1’: This source has raised an interrupt request
8.4 - Exception and Error Traps List
Table 8 shows all of the possible exceptions or error conditions that can arise during run-time:
Table 8 : Trap Priorities
Trap
Vector
Vector
Location
Trap
Number
Trap*
Priority
RESET
RESET
RESET
00’0000h
00’0000h
00’0000h
00h
00h
00h
III
III
III
NMI
STKOF
STKUF
NMITRAP
STOTRAP
STUTRAP
00’0008h
00’0010h
00’0018h
02h
04h
06h
II
II
II
UNDOPC
PRTFLT
ILLOPA
ILLINA
ILLBUS
BTRAP
BTRAP
BTRAP
BTRAP
BTRAP
00’0028h
00’0028h
00’0028h
00’0028h
00’0028h
0Ah
0Ah
0Ah
0Ah
0Ah
I
I
I
I
I
Reserved
[002Ch - 003Ch]
[0Bh - 0Fh]
Software Traps
TRAP Instruction
Any
0000h – 01FCh
in steps of 4h
Any
[00h - 7Fh]
Exception Condition
Trap
Flag
Reset Functions:
Hardware Reset
Software Reset
Watchdog Timer Overflow
Class A Hardware Traps:
Non-Maskable Interrupt
Stack Overflow
Stack Underflow
Class B Hardware Traps:
Undefined Opcode
Protected Instruction Fault
Illegal word Operand Access
Illegal Instruction Access
Illegal External Bus Access
*
Current
CPU
Priority
- All the class B traps have the same trap number (and vector) and the same lower priority compare to the class A traps and to the resets.
- Each class A traps has a dedicated trap number (and vector). They are prioritized in the second priority level.
- The resets have the highest priority level and the same trap number.
- The PSW.ILVL CPU priority is forced to the highest level (15) when these exceptions are serviced.
47/160
ST10F269-T3
9 - CAPTURE/COMPARE (CAPCOM) UNITS
The ST10F269-T3 has two 16 channels CAPCOM
units as described in Figure 12. These support
generation and control of timing sequences on up
to 32 channels with a maximum resolution of
250ns at 32MHz CPU clock. The CAPCOM units
are typically used to handle high speed I/O tasks
such as pulse and waveform generation, pulse
width modulation (PMW), Digital to Analog (D/A)
conversion, software timing, or time recording
relative to external events.
Four 16-bit timers (T0/T1, T7/T8) with reload
registers provide two independent time bases for
the capture/compare register array (See Figures
13 and 14).
The input clock for the timers is programmable to
several prescaled values of the internal system
clock, or may be derived from an overflow/
underflow of timer T6 in module GPT2. This
provides a wide range of variation for the timer
period and resolution and allows precise
adjustments to application specific requirements.
In addition, external count inputs for CAPCOM
timers T0 and T7 allow event scheduling for the
capture/compare registers relative to external
events.
Each of the two capture/compare register arrays
contain 16 dual purpose capture/compare
registers, each of which may be individually
allocated to either CAPCOM timer T0 or T1 (T7 or
T8, respectively), and programmed for capture or
compare functions. Each of the 32 registers has
one associated port pin which serves as an input
pin for triggering the capture function, or as an
output pin to indicate the occurrence of a compare
event. Figure 12 shows the basic structure of the
two CAPCOM units.
Figure 12 : CAPCOM Unit Block Diagram
Reload Register TxREL
CPU
Clock
x = 0, 7
2n n = 3...10
TxIN
Pin
Interrupt
Request
Tx
Input
Control
CAPCOM Timer Tx
Mode
Control
(Capture
or
Compare)
Sixteen 16-bit
(Capture/Compare)
Registers
GPT2 Timer T6
Over / Underflow
Pin
16
Capture inputs
Compare outputs
16
Capture / Compare*
Interrupt Requests
Pin
CPU
Clock
2n n = 3...10
Ty
Input
Control
Interrupt
Request
CAPCOM Timer Ty
GPT2 Timer T6
Over / Underflow
Reload Register TyREL
* The CAPCOM2 unit provides 16 capture inputs, but only 12 compare outputs. CC24I to CC27I are inputs only.
48/160
y = 1, 8
ST10F269-T3
Figure 13 : Block Diagram of CAPCOM Timers T0 and T7
Reload Register TxREL
Txl
Input
Control
CPU
Clock
X
GPT2 Timer T6
Over / Underflow
MUX
CAPCOM Timer Tx
TxIR
Interrupt
Request
Edge Select
TxR
Txl TxM
TxIN Pin
x = 0, 7
Txl
Figure 14 : Block Diagram of CAPCOM Timers T1 and T8
Reload Register TxREL
Txl
CPU
Clock
X
GPT2 Timer T6
Over / Underflow
MUX
CAPCOM Timer Tx
TxM
TxR
Note: When an external input signal is
connected to the input lines of both T0 and
T7, these timers count the input signal
synchronously. Thus the two timers can be
regarded as one timer whose contents can
be compared with 32 capture registers.
When a capture/compare register has been
selected for capture mode, the current contents of
the allocated timer will be latched (captured) into
the capture/compare register in response to an
external event at the port pin which is associated
with this register. In addition, a specific interrupt
request for this capture/compare register is
generated.
Either a positive, a negative, or both a positive and
a negative external signal transition at the pin can
be selected as the triggering event. The contents
of all registers which have been selected for one
TxIR
Interrupt
Request
x = 1, 8
of the five compare modes are continuously
compared with the contents of the allocated
timers.
When a match occurs between the timer value
and the value in a capture /compare register,
specific actions will be taken based on the
selected compare mode (see Table 9).
The input frequencies fTx, for the timer input
selector Tx, are determined as a function of the
CPU clocks. The timer input frequencies,
resolution and periods which result from the
selected pre-scaler option in TxI when using a
32MHz CPU clock are listed in the Table 10.
The numbers for the timer periods are based on a
reload value of 0000h. Note that some numbers
may be rounded to 3 significant figures.
49/160
ST10F269-T3
Table 9 : Compare Modes
Compare Modes
Function
Mode 0
Interrupt-only compare mode; several compare interrupts per timer period are possible
Mode 1
Pin toggles on each compare match; several compare events per timer period are possible
Mode 2
Interrupt-only compare mode; only one compare interrupt per timer period is generated
Mode 3
Pin set ‘1’ on match; pin reset ‘0’ on compare time overflow; only one compare event per timer
period is generated
Double Register
Mode
Two registers operate on one pin; pin toggles on each compare match; several compare events
per timer period are possible.
Table 10 : CAPCOM Timer Input Frequencies, Resolution and Periods
Timer Input Selection TxI
fCPU = 32MHz
000b
001b
010b
011b
100b
101b
110b
111b
8
16
32
64
128
256
512
1024
Input Frequency
4MHz
2MHz
1MHz
500KHz
250KHz
125KHz
62.5KHz
31.125KHz
Resolution
250ns
500ns
1µs
2µs
4µs
8µs
16µs
32µs
Period
16.4ms
32.8ms
65.5ms
131ms
262.1ms
524.3ms
1.05s
2.1s
Pre-scaler for fCPU
50/160
ST10F269-T3
10 - GENERAL PURPOSE TIMER UNIT
The GPT unit is a flexible multifunctional timer/
counter structure which is used for time related
tasks such as event timing and counting, pulse
width and duty cycle measurements, pulse
generation, or pulse multiplication. The GPT unit
contains five 16-bit timers organized into two
separate modules GPT1 and GPT2. Each timer in
each module may operate independently in
several different modes, or may be concatenated
with another timer of the same module.
10.1 - GPT1
Each of the three timers T2, T3, T4 of the GPT1
module can be configured individually for one of
four basic modes of operation: timer, gated
timer, counter mode and incremental interface
mode.
In timer mode, the input clock for a timer is derived
from the CPU clock, divided by a programmable
prescaler.
In counter mode, the timer is clocked in reference
to external events.
Pulse width or duty cycle measurement is
supported in gated timer mode where the
operation of a timer is controlled by the ‘gate’ level
on an external input pin. For these purposes, each
timer has one associated port pin (TxIN) which
serves as gate or clock input.
Table 11 lists the timer input frequencies,
resolution and periods for each pre-scaler option
at 32MHz CPU clock. This also applies to the
Gated Timer Mode of T3 and to the auxiliary
timers T2 and T4 in Timer and Gated Timer Mode.
The count direction (up/down) for each timer is
programmable by software or may be altered
dynamically by an external signal on a port pin
(TxEUD).
In Incremental Interface Mode, the GPT1 timers
(T2, T3, T4) can be directly connected to the
incremental position sensor signals A and B by
their respective inputs TxIN and TxEUD.
Direction and count signals are internally derived
from these two input signals so that the contents
of the respective timer Tx corresponds to the
sensor position. The third position sensor signal
TOP0 can be connected to an interrupt input.
Timer T3 has output toggle latches (TxOTL) which
changes state on each timer over flow / underflow.
The state of this latch may be output on port pins
(TxOUT) for time out monitoring of external
hardware components, or may be used internally
to clock timers T2 and T4 for high resolution of
long duration measurements.
In addition to their basic operating modes, timers
T2 and T4 may be configured as reload or capture
registers for timer T3. When used as capture or
reload registers, timers T2 and T4 are stopped.
The contents of timer T3 is captured into T2 or T4
in response to a signal at their associated input
pins (TxIN).
Timer T3 is reloaded with the contents of T2 or T4
triggered either by an external signal or by a
selectable state transition of its toggle latch
T3OTL. When both T2 and T4 are configured to
alternately reload T3 on opposite state transitions
of T3OTL with the low and high times of a PWM
signal, this signal can be constantly generated
without software intervention.
Table 11 : GPT1 Timer Input Frequencies, Resolution and Periods
Timer Input Selection T2I / T3I / T4I
fCPU = 32MHz
000b
001b
010b
011b
100b
101b
110b
111b
8
16
32
64
128
256
512
1024
Input Freq
4MHz
2MHz
1MHz
500KHz
250KHz
125KHz
62.5KHz
31.125KHz
Resolution
250ns
500ns
1µs
2µs
4µs
8µs
16µs
32µs
Period
maximum
16.4ms
32.8ms
65.5ms
131ms
262.1ms
524.3ms
1.05s
2.1s
Pre-scaler factor
51/160
ST10F269-T3
Figure 15 : Block Diagram of GPT1
U/D
T2EUD
CPU Clock
2 n=3...10
T2IN
CPU Clock
Interrupt
Request
GPT1 Timer T2
n
2n n=3...10
T3IN
T2
Mode
Control
Reload
Capture
T3OUT
T3
Mode
Control
T3OTL
GPT1 Timer T3
U/D
T3EUD
T4IN
CPU Clock
2n n=3...10
Capture
Reload
T4
Mode
Control
Interrupt
Request
Interrupt
Request
GPT1 Timer T4
U/D
T4EUD
10.2 - GPT2
The GPT2 module provides precise event control
and time measurement. It includes two timers (T5,
T6) and a capture/reload register (CAPREL). Both
timers can be clocked with an input clock which is
derived from the CPU clock via a programmable
prescaler or with external signals. The count
direction
(up/down)
for
each
timer
is
programmable by software or may additionally be
altered dynamically by an external signal on a port
pin (TxEUD). Concatenation of the timers is
supported via the output toggle latch (T6OTL) of
timer T6 which changes its state on each timer
overflow/underflow.
The state of this latch may be used to clock timer
T5, or it may be output on a port pin (T6OUT). The
overflow / underflow of timer T6 can additionally
be used to clock the CAPCOM timers T0 or T1,
and to cause a reload from the CAPREL register.
The CAPREL register may capture the contents of
timer T5 based on an external signal transition on
the corresponding port pin (CAPIN), and timer T5
may optionally be cleared after the capture
procedure. This allows absolute time differences
to be measured or pulse multiplication to be
performed without software overhead.
The capture trigger (timer T5 to CAPREL) may
also be generated upon transitions of GPT1 timer
T3 inputs T3IN and/or T3EUD. This is
advantageous when T3 operates in Incremental
Interface Mode.
Table 12 lists the timer input frequencies,
resolution and periods for each pre-scaler option
at 32MHz CPU clock. This also applies to the
Gated Timer Mode of T6 and to the auxiliary timer
T5 in Timer and Gated Timer Mode.
Table 12 : GPT2 Timer Input Frequencies, Resolution and Period
Timer Input Selection T5I / T6I
fCPU = 32MHz
Pre-scaler factor
000b
001b
010b
011b
100b
101b
110b
111b
4
8
16
32
64
128
256
512
62.5KHz
Input Freq
8MHz
4MHz
2MHz
1MHz
500KHz
250KHz
125KHz
Resolution
125ns
250ns
500ns
1µs
2µs
4µs
8µs
16µs
Period maximum
8.19ms
16.4ms
32.8ms
65.5ms
131ms
262.1ms
524.3ms
1.05s
52/160
ST10F269-T3
Figure 16 : Block Diagram of GPT2
T5EUD
U/D
CPU Clock
2n n=2...9
T5IN
T5
Mode
Control
Interrupt
Request
GPT2 Timer T5
Clear
Capture
Interrupt
Request
CAPIN
GPT2 CAPREL
Reload
T6IN
CPU Clock
T6EUD
2n n=2...9
T6
Mode
Control
Interrupt
Request
Toggle FF
GPT2 Timer T6
U/D
T60TL
T6OUT
to CAPCOM
Timers
53/160
ST10F269-T3
11 - PWM MODULE
The pulse width modulation module can generate
up to four PWM output signals using edge-aligned
or centre-aligned PWM. In addition, the PWM
module can generate PWM burst signals and
single shot outputs. The Table 13 shows the PWM
frequencies for different resolutions. The level of
the output signals is selectable and the PWM
module can generate interrupt requests.
Figure 17 : Block Diagram of PWM Module
PPx Period Register
*
Comparator
Clock 1
Clock 2
Input
Control
Match
*
PTx
16-bit Up/Down Counter
Up/Down/
Clear Control
Run
Comparator
Match
Output Control
POUTx
Enable
Shadow Register
* User readable / writeable register
Write Control
PWx Pulse Width Register *
Table 13 : PWM Unit Frequencies and Resolution at 32MHz CPU Clock
Mode 0
Resolution
8-bit
10-bit
12-bit
14-bit
16-bit
CPU Clock/1
31.25ns
125KHz
31.25KHz
7.81KHz
1.953KHz
976.6Hz
CPU Clock/64
2.00µs
1.953KHz
488.3Hz
122.1Hz
30.52Hz
7.63Hz
Mode 1
Resolution
8-bit
10-bit
12-bit
14-bit
16-bit
CPU Clock/1
31.25ns
62.5KHz
15.62KHz
3.90KHz
976.6Hz
244.1Hz
CPU Clock/64
2.00µs
976.6Hz
244.1Hz
61Hz
15.26Hz
3.81Hz
54/160
ST10F269-T3
12 - PARALLEL PORTS
12.1 - Introduction
The ST10F269-T3 MCU provides up to 111 I/O
lines with programmable features. These
capabilities bring very flexible adaptation of this
MCU to wide range of applications.
ST10F269-T3 has 9 groups of I/O lines gathered
as following:
– Port 0 is a 2 time 8-bit port named P0L (Low as
less significant Byte) and P0H (high as most significant Byte)
– Port 1 is a 2 time 8-bit port named P1L and P1H
– Port 2 is a 16-bit port
– Port 3 is a 15-bit port (P3.14 line is not implemented)
– Port 4 is a 8-bit port
– Port 5 is a 16-bit port input only
– Port 6, Port 7 and Port 8 are 8-bit port
These ports may be used as general purpose
bidirectional input or output, software controlled
with dedicated registers.
For example the output drivers of six of the ports
(2, 3, 4, 6, 7, 8) can be configured (bit-wise) for
push-pull or open drain operation using ODPx
registers.
In addition, the sink and the source capability and
the rise / fall time of the transition of the signal of
some of the push-pull buffers can be programmed
to fit the driving requirements of the application
and to minimize EMI. This feature is implemented
on Port 0, 1, 2, 3, 4, 6, 7 and 8 with the control
registers POCONx. The output drivers capabilities
of ALE, RD, WR control lines are programmable
with the dedicated bits of POCON20 control
register.
The input threshold levels are programmable
(TTL/CMOS) for 5 ports (2, 3, 4, 7, 8). The logic
level of a pin is clocked into the input latch once
per state time, regardless whether the port is
configured for input or output. The threshold is
selected with the PICON register control bits.
A write operation to a port pin configured as an
input causes the value to be written into the port
output latch, while a read operation returns the
latched state of the pin itself. A read-modify-write
operation reads the value of the pin, modifies it,
and writes it back to the output latch.
Writing to a pin configured as an output
(DPx.y=‘1’) causes the output latch and the pin to
have the written value, since the output buffer is
enabled. Reading this pin returns the value of the
output latch. A read-modify-write operation reads
the value of the output latch, modifies it, and
writes it back to the output latch, thus also
modifying the level at the pin.
I/O lines support an alternate function which is
detailed in the following description of each port.
55/160
56/160
-
-
-
-
-
-
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
-
-
-
P6
P7
P8
-
-
-
-
-
-
Y
E
-
-
-
-
P2LIN P2HIN
P3LIN P3HIN
P4LIN
P6LIN (to be implemented)
P7LIN
P8LIN
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
E
E
DP8
DP7
DP6
DP4
DP3
DP2
DP1H E
DP1L
DP0H E
DP0L
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
Y - Y Y Y Y Y Y Y Y Y Y Y Y Y Y
Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y
-
-
-
-
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Direction Control Registers
: Bit has an I/O function
: Bit has no I/O dedicated function or is not implemented
: Register belongs to ESFR area
PICON:
-
-
-
-
Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y
-
P5
-
-
P4
Y - Y Y Y Y Y Y Y Y Y Y Y Y Y Y
-
P1H -
-
-
-
P3
-
-
P1L
-
-
Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y
-
P0H -
-
P2
-
-
P0L
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Data Input / Output Register
ODP8
ODP7
ODP6
P5DIDIS
ODP4
ODP3
ODP2
PICON
E
E
E
E
E
E
E
-
-
-
-
- - - Y Y - Y Y Y Y Y
-
-
-
-
- - - Y Y - - - - - -
- Y - Y Y Y Y Y Y Y Y Y Y Y Y
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y
-
-
Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y
-
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Threshold / Open Drain Control
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
* RD, WR, ALE lines only
-
POCON20 * E
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
- - - Y Y Y Y Y Y Y Y
Y - Y Y Y Y Y Y Y Y Y Y Y Y Y Y
Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y
-
-
-
-
-
E
E
E
E
E
E
E
E
E
E
POCON8
POCON7
POCON6
POCON4
POCON3
POCON2
POCON1H
POCON1L
POCON0H
POCON0L
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Output Driver Control Register
ST10F269-T3
Figure 18 : SFRs and Pins Associated with the Parallel Ports
ST10F269-T3
12.2 - I/O’s Special Features
12.2.2 - Input Threshold Control
The standard inputs of the ST10F269-T3
determine the status of input signals according to
TTL levels. In order to accept and recognize noisy
signals, CMOS-like input thresholds can be
selected instead of the standard TTL thresholds
for all pins of Port 2, Port 3, Port 4, Port 7 and Port
8. These special thresholds are defined above the
TTL thresholds and feature a defined hysteresis to
prevent the inputs from toggling while the
respective input signal level is near the thresholds.
12.2.1 - Open Drain Mode
Some of the I/O ports of ST10F269-T3 support
the open drain capability. This programmable
feature may be used with an external pull-up
resistor, in order to get an AND wired logical
function.
This feature is implemented for ports P2, P3, P4,
P6, P7 and P8 (see respective sections), and is
controlled through the respective Open Drain
Control Registers ODPx. These registers allow
the individual bit-wise selection of the open drain
mode for each port line. If the respective control
bit ODPx.y is ‘0’ (default after reset), the output
driver is in the push-pull mode. If ODPx.y is ‘1’, the
open drain configuration is selected. Note that all
ODPx registers are located in the ESFR space
(See Figure 19).
PICON (F1C4h / E2h)
The Port Input Control register PICON is used to
select these thresholds for each Byte of the
indicated ports, this means the 8-bit ports P4, P7
and P8 are controlled by one bit each while ports
P2 and P3 are controlled by two bits each.
All options for individual direction and output mode
control are available for each pin, independent of
the selected input threshold. The input hysteresis
provides stable inputs from noisy or slowly
changing external signals (See Figure 20).
ESFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
Reset Value: --00h
7
6
P8LIN P7LIN
RW
Bit
PxLIN
-
4
3
2
1
0
P4LIN P3HIN P3LIN P2HIN P2LIN
RW
RW
RW
RW
RW
RW
Function
Port x Low Byte Input Level Selection
0:
1:
PxHIN
5
Pins Px.7...Px.0 switch on standard TTL input levels
Pins Px.7...Px.0 switch on special threshold input levels
Port x High Byte Input Level Selection
0:
1:
Pins Px.15...Px.8 switch on standard TTL input levels
Pins Px.15...Px.8 switch on special threshold input levels
Figure 19 : Output Drivers in Push-pull Mode and in Open Drain Mode
External
Pullup
Pin
Q
Pin
Q
Push-Pull Output Driver
Open Drain Output Driver
57/160
ST10F269-T3
Figure 20 : Hysteresis for Special Input Thresholds
Hysteresis
Input level
Bit state
12.2.3 - Output Driver Control
The port output control registers POCONx allow
to select the port output driver characteristics of a
port. The aim of these selections is to adapt the
output drivers to the application’s requirements,
and to improve the EMI behaviour of the device.
Two characteristics may be selected:
Edge characteristic defines the rise/fall time for
the respective output. Slow edges reduce the
peak currents that are sinked/sourced when
changing the voltage level of an external
capacitive load. For a bus interface or pins that
are changing at frequency higher than 1MHz,
however, fast edges may still be required.
Driver characteristic defines either the general
driving capability of the respective driver, or if the
POCONx (F0yyh / zzh) for 8-bit Ports
driver strength is reduced after the target output
level has been reached or not. Reducing the
driver strength increases the output’s internal
resistance, which attenuates noise that is
imported via the output line. For driving LEDs or
power transistors, however, a stable high output
current may still be required as described below.
This rise / fall time of 4 I/O pads (a nibble) is
selected using 2-bit named PNxEC. That means
Port Nibble (x = nibble number, it could be 3 as for
Port 2.15 to 2.12) Edge Characteristic.
The sink / source capability of the same 4 I/O
pads is selected using 2-bit named PNxDC. That
means Port Nibble (x = nibble number) Drive
Characteristic (See Table 14).
ESFR
Reset Value: --00h
15
14
13
12
11
10
9
8
7
-
-
-
-
-
-
-
-
PN1DC
PN1EC
PN0DC
PN0EC
RW
RW
RW
RW
POCONx (F0yyh / zzh) for 16-bit Ports
15
14
13
12
11
10
6
5
4
3
ESFR
9
8
2
1
0
Reset Value: 0000h
7
6
5
4
3
2
1
0
PN3DC
PN3EC
PN2DC
PN2EC
PN1DC
PN1EC
PN0DC
PN0EC
RW
RW
RW
RW
RW
RW
RW
RW
Bit
Function
PNxEC
Port Nibble x Edge Characteristic (rise/fall time)
00:
Fast edge mode, rise/fall times depend on the size of the driver.
01:
Slow edge mode, rise/fall times ~60 ns
10:
Reserved
11:
Reserved
PNxDC
Port Nibble x Driver Characteristic (output current)
00:
High Current mode:
Driver always operates with maximum strength.
01:
Dynamic Current mode:
Driver strength is reduced after the target level has been reached.
10:
Low Current mode:
Driver always operates with reduced strength.
11:
Reserved
Note: In case of reading an 8 bit P0CONX register, high Byte (bit 15.8) is read as 00h
58/160
ST10F269-T3
The table lists the defined POCON registers and the allocation of control bit-fields and port pins.
Table 14 : Port Control Register Allocation
Control
Register
Controlled Port Nibble
Physical
Address
8-bit
Address
POCON0L
F080h
40h
P0L.7...4
P0L.3...0
POCON0H
F082h
41h
P0H.7...4
P0H.3...0
POCON1L
F084h
42h
P1L.7...4
P1L.3...0
POCON1H
F086h
43h
P1H.7...4
P1H.3...0
POCON2
F088h
44h
P2.15...12
P2.11...8
P2.7...4
P2.3...0
P3.15, 3.13, 3.12
P3.11...8
2
3
1
0
POCON3
F08Ah
45h
P3.7...4
P3.3...0
POCON4
F08Ch
46h
P4.7...4
P4.3...0
POCON6
F08Eh
47h
P6.7...4
P6.3...0
POCON7
F090h
48h
P7.7...4
P7.3...0
POCON8
F092h
49h
P8.7...4
P8.3...0
Dedicated Pins Output Control
Programmable pad drivers also are supported for the dedicated pins ALE, RD and WR. For these pads,
a special POCON20 register is provided.
POCON20 (F0AAh / 55h)
ESFR
Reset Value: --00h
15
14
13
12
11
10
9
8
7
-
-
-
-
-
-
-
-
PN1DC
6
5
PN1EC
4
3
PN0DC
2
PN0EC
RW
RW
RW
RW
PN0EC
RD, WR Edge Characteristic (rise/fall time)
00:
Fast edge mode, rise/fall times depend on the size of the driver.
01:
Slow edge mode, rise/fall times ~60 ns
10:
Reserved
11:
Reserved
PN0DC
RD, WR Driver Characteristic (output current)
00:
High Current mode:
Driver always operates with maximum strength.
01:
Dynamic Current mode:
Driver strength is reduced after the target level has been reached.
10:
Low Current mode:
Driver always operates with reduced strength.
11:
Reserved
PN1EC
ALE Edge Characteristic (rise/fall time)
00:
Fast edge mode, rise/fall times depend on the size of the driver.
01:
Slow edge mode, rise/fall times ~60 ns
10:
Reserved
11:
Reserved
PN1DC
ALE Driver Characteristic (output current)
00:
High Current mode:
Driver always operates with maximum strength.
01:
Dynamic Current mode:
Driver strength is reduced after the target level has been reached.
10:
Low Current mode:
Driver always operates with reduced strength.
11:
Reserved
1
0
59/160
ST10F269-T3
12.2.4 - Alternate Port Functions
Each port line has one associated programmable
alternate input or output function.
– PORT0 and PORT1 may be used as address
and data lines when accessing external memory.
– Port 2, Port 7 and Port 8 are associated with the
capture inputs or compare outputs of the CAPCOM units and/or with the outputs of the PWM
module.
Port 2 is also used for fast external interrupt inputs and for timer 7 input.
– Port 3 includes the alternate functions of timers,
serial interfaces, the optional bus control signal
BHE and the system clock output (CLKOUT).
– Port 4 outputs the additional segment address
bit A16 to A23 in systems where segmentation
is enabled to access more than 64K Bytes of
memory.
– Port 5 is used as analog input channels of the
A/D converter or as timer control signals.
– Port 6 provides optional bus arbitration signals
(BREQ, HLDA, HOLD) and chip select signals.
If an alternate output function of a pin is to be
used, the direction of this pin must be
programmed for output (DPx.y=‘1’), except for
some signals that are used directly after reset and
are configured automatically. Otherwise the pin
remains in the high-impedance state and is not
effected by the alternate output function. The
respective port latch should hold a ‘1’, because its
output is ANDed with the alternate output data
(except for PWM output signals).
If an alternate input function of a pin is used, the
direction of the pin must be programmed for input
(DPx.y=‘0’) if an external device is driving the pin.
The input direction is the default after reset. If no
external device is connected to the pin, however,
one can also set the direction for this pin to output.
SINGLE_BIT: BSET
BIT_GROUP:
In this case, the pin reflects the state of the port
output latch. Thus, the alternate input function
reads the value stored in the port output latch.
This can be used for testing purposes to allow a
software trigger of an alternate input function by
writing to the port output latch.
On most of the port lines, the application software
must set the proper direction when using an
alternate input or output function of a pin. This is
done by setting or clearing the direction control bit
DPx.y of the pin before enabling the alternate
function. There are port lines, however, where the
direction of the port line is switched automatically.
For instance, in the multiplexed external bus
modes of PORT0, the direction must be switched
several times for an instruction fetch in order to
output the addresses and to input the data.
Obviously, this cannot be done through
instructions. In these cases, the direction of the
port line is switched automatically by hardware if
the alternate function of such a pin is enabled.
To determine the appropriate level of the port
output latches check how the alternate data
output is combined with the respective port latch
output.
There is one basic structure for all port lines
supporting only one alternate input function. Port
lines with only one alternate output function,
however, have different structures. It has to be
adapted to support the normal and the alternate
function features.
All port lines that are not used for these alternate
functions may be used as general purpose I/O
lines. When using port pins for general purpose
output, the initial output value should be written to
the port latch prior to enabling the output drivers,
in order to avoid undesired transitions on the
output pins. This applies to single pins as well as
to pin groups (see examples below).
P4.7
; Initial output level is "high"
BSET
DP4.7
; Switch on the output driver
BFLDH
P4, #24H, #24H
; Initial output level is "high"
BFLDH
DP4, #24H, #24H
; Switch on the output drivers
Note: When using several BSET pairs to control more pins of one port, these pairs must be separated by
instructions, which do not apply to the respective port (See Chapter 6 - Central Processing Unit
(CPU)).
60/160
ST10F269-T3
12.3 - PORT0
The two 8-bit ports P0H and P0L represent the
higher and lower part of PORT0, respectively.
Both halves of PORT0 can be written (via a PEC
transfer) without effecting the other half.
P0L (FF00h / 80h)
If this port is used for general purpose I/O, the
direction of each line can be configured via the
corresponding direction registers DP0H and
DP0L.
SFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
Reset Value: --00h
7
6
3
2
RW
RW
RW
RW
SFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
1
0
RW
RW
RW
Reset Value: --00h
7
6
5
4
3
2
1
0
P0H.7 P0H.6 P0H.5 P0H.4 P0H.3 P0H.2 P0H.1 P0H.0
RW
P0X.y
4
P0L.7 P0L.6 P0L.5 P0L.4 P0L.3 P0L.2 P0L.1 P0L.0
RW
P0H (FF02h / 81h)
5
RW
RW
RW
RW
RW
RW
RW
Port Data Register P0H or P0L Bit y
DP0L (F100h / 80h)
ESFR
Reset Value: --00h
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
DP0L.7
DP0L.6
DP0L.5
DP0L.4
DP0L.3
DP0L.2
DP0L.1
DP0L.0
RW
RW
RW
RW
RW
RW
RW
RW
DP0H (F102h / 81h)
ESFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
5
4
3
2
1
0
DP0H.7 DP0H.6 DP0H.5 DP0H.4 DP0H.3 DP0H.2 DP0H.1 DP0H.0
RW
DP0X.y
6
Reset Value: --00h
RW
RW
RW
RW
RW
RW
RW
Port Direction Register DP0H or DP0L Bit y
DP0X.y = 0: Port line P0X.y is an input (high-impedance)
DP0X.y = 1: Port line P0X.y is an output
61/160
ST10F269-T3
12.3.1 - Alternate Functions of PORT0
When an external bus is enabled, PORT0 is used
as data bus or address/data bus.
Note that an external 8-bit demultiplexed bus only
uses P0L, while P0H is free for I/O (provided that
no other bus mode is enabled).
PORT0 is also used to select the system start-up
configuration. During reset, PORT0 is configured
to input, and each line is held high through an
internal pull-up device.
Each line can now be individually pulled to a low
level (see Section 21.3 - DC Characteristics)
through an external pull-down device. A default
configuration is selected when the respective
PORT0 lines are at a high level. Through pulling
individual lines to a low level, this default can be
changed according to the needs of the
applications.
The internal pull-up devices are designed in such
way that an external pull-down resistors (see Data
Sheet specification) can be used to apply a
correct low level.
These external pull-down resistors can remain
connected to the PORT0 pins also during normal
operation, however, care has to be taken in order
to not disturb the normal function of PORT0 (this
might be the case, for example, if the external
resistor value is too low).
With the end of reset, the selected bus
configuration will be written to the BUSCON0
register.
The configuration of the high byte of PORT0, will
be copied into the special register RP0H. This
read-only register holds the selection for the
number of chip selects and segment addresses.
Software can read this register in order to react
according to the selected configuration, if
required.
When the reset is terminated, the internal pull-up
devices are switched off, and PORT0 will be
switched to the appropriate operating mode.
During external accesses in multiplexed bus
modes PORT0 first outputs the 16-bit
intra-segment address as an alternate output
function.
PORT0
is
then
switched
to
high-impedance input mode to read the incoming
instruction or data. In 8-bit data bus mode, two
memory cycles are required for word accesses,
the first for the low Byte and the second for the
high Byte of the Word.
During write cycles PORT0 outputs the data Byte
or Word after outputting the address. During
external accesses in demultiplexed bus modes
PORT0 reads the incoming instruction or data
Word or outputs the data Byte or Word.
Figure 21 : PORT0 I/O and Alternate Functions
Alternate Function
P0H
PORT0
P0L
P0H.7
P0H.6
P0H.5
P0H.4
P0H.3
P0H.2
P0H.1
P0H.0
P0L.7
P0L.6
P0L.5
P0L.4
P0L.3
P0L.2
P0L.1
P0L.0
General Purpose
Input/Output
62/160
a)
b)
D7
D6
D5
D4
D3
D2
D1
D0
8-bit
Demultiplexed Bus
c)
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
16-bit
Demultiplexed Bus
d)
A15
A14
A13
A12
A11
A10
A9
A8
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
AD15
AD14
AD13
AD12
AD11
AD10
AD9
AD8
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
8-bit
Multiplexed Bus
16-bit
Multiplexed Bus
ST10F269-T3
When an external bus mode is enabled, the
direction of the port pin and the loading of data
into the port output latch are controlled by the bus
controller hardware.
The input of the port output Buffer is disconnected
from the internal bus and is switched to the line
labeled “Alternate Data Output” via a multiplexer.
The alternate data can be the 16-bit intra-segment
address or the 8/16-bit data information. The
incoming data on PORT0 is read on the line
“Alternate Data Input”. While an external bus
mode is enabled, the user software should not
write to the port output latch, otherwise
unpredictable results may occur.
When the external bus modes are disabled, the
contents of the direction register last written by the
user becomes active.
The Figure 22 shows the structure of a PORT0
pin.
Figure 22 : Block Diagram of a PORT0 Pin
Write DP0H.y / DP0L.y
Alternate
Direction
1
MUX
Direction
Latch
0
Read DP0H.y / DP0L.y
Alternate
Function
Enable
Internal Bus
Alternate
Data
Output
Write P0H.y / P0L.y
1
Port Output
Latch
Port Data
Output
MUX
Output
Buffer
0
P0H.y
P0L.y
Read P0H.y / P0L.y
Clock
1
MUX
0
Input
Latch
y = 7...0
63/160
ST10F269-T3
12.4 - PORT1
The two 8-bit ports P1H and P1L represent the higher and lower part of PORT1, respectively. Both halves
of PORT1 can be written (via a PEC transfer) without effecting the other half.
If this port is used for general purpose I/O, the direction of each line can be configured via the
corresponding direction registers DP1H and DP1L.
P1L (FF04h / 82h)
SFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
Reset Value: --00h
7
4
3
2
RW
RW
RW
RW
RW
SFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
1
0
RW
RW
Reset Value: --00h
7
6
5
4
3
2
1
0
P1H.7 P1H.6 P1H.5 P1H.4 P1H.3 P1H.2 P1H.1 P1H.0
RW
P1X.y
5
P1L.7 P1L.6 P1L.5 P1L4 P1L.3 P1L.2 P1L.1 P1L.0
RW
P1H (FF06h / 83h)
6
RW
RW
RW
RW
RW
RW
RW
Port Data Register P1H or P1L Bit y
DP1L (F104h / 82h)
ESFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
5
4
3
2
DP1H (F106h / 83h)
RW
RW
RW
RW
RW
ESFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
1
0
DP1L.7 DP1L.6 DP1L.5 DP1L.4 DP1L.3 DP1L.2 DP1L.1 DP1L.0
RW
7
6
RW
RW
Reset Value: --00h
5
4
3
2
1
0
DP1H.7 DP1H.6 DP1H.5 DP1H.4 DP1H.3 DP1H.2 DP1H.1 DP1H.0
RW
DP1X.y
6
Reset Value: --00h
RW
RW
RW
RW
RW
RW
RW
Port Direction Register DP1H or DP1L Bit y
DP1X.y = 0: Port line P1X.y is an input (high-impedance)
DP1X.y = 1: Port line P1X.y is an output
12.4.1 - Alternate Functions of PORT1
When a demultiplexed external bus is enabled, PORT1 is used as address bus.
Note: Demultiplexed bus modes use PORT1 as a 16-bit port. Otherwise all 16 port lines can be used for
general purpose I/O.
The upper 4 pins of PORT1 (P1H.7...P1H.4) are used as capture input lines (CC27IO...CC24IO).
During external accesses in demultiplexed bus modes PORT1 outputs the 16-bit intra-segment address
as an alternate output function.
During external accesses in multiplexed bus modes, when no BUSCON register selects a demultiplexed
bus mode, PORT1 is not used and is available for general purpose I/O.
64/160
ST10F269-T3
Figure 23 : PORT1 I/O and Alternate Functions
Alternate Function
P1H
PORT1
P1L
a)
b)
P1H.7
P1H.6
P1H.5
P1H.4
P1H.3
P1H.2
P1H.1
P1H.0
P1L.7
P1L.6
P1L.5
P1L.4
P1L.3
P1L.2
P1L.1
P1L.0
General Purpose Input/Output
A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
CC27IO
CC26IO
CC25IO
CC24IO
8/16-bit Demultiplexed Bus
When an external bus mode is enabled, the
direction of the port pin and the loading of data
into the port output latch are controlled by the bus
controller hardware.
The input of the port Buffer latch is disconnected
from the internal bus and is switched to the line
labeled “Alternate Data Output” via a multiplexer.
The alternate data is the 16-bit intra-segment
CAPCOM2 Capture Inputs only
address. While an external bus mode is enabled,
the user software should not write to the port
output latch, otherwise unpredictable results may
occur. When the external bus modes are disabled,
the contents of the direction register last written by
the user becomes active.
The Figure 24 shows the structure of a PORT1
pin.
Figure 24 : Block Diagram of a PORT1 Pin
Write DP1H.y / DP1L.y
“1”
1
MUX
Direction
Latch
0
Read DP1H.y / DP1L.y
Alternate
Function
Enable
Internal Bus
Alternate
Data
Output
Write P1H.y / P1L.y
1
Port Output
Latch
Port Data
Output
MUX
Output
Buffer
0
P1H.y
P1L.y
Read P1H.y / P1L.y
Clock
1
MUX
0
Input
Latch
y = 7...0
65/160
ST10F269-T3
12.5 - Port 2
If this 16-bit port is used for general purpose I/O, the direction of each line can be configured via the
corresponding direction register DP2. Each port line can be switched into push/pull or open drain mode
via the open drain control register ODP2.
P2 (FFC0h / E0h)
15
14
SFR
13
12
11
10
P2.15 P2.14 P2.13 P2.12 P2.11 P2.10
RW
RW
RW
P2.y
RW
RW
RW
Reset Value: 0000h
9
8
7
6
5
4
3
2
1
0
P2.9
P2.8
P2.7
P2.6
P2.5
P2.4
P2.3
P2.2
P2.1
P2.0
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Port Data Register P2 Bit y
DP2 (FFC2h / E1h)
SFR
Reset Value: 0000h
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
DP2
.15
DP2
.14
DP2
.13
DP2
.12
DP2
.11
DP2
.10
DP2
.9
DP2
.8
DP2
.7
DP2
.6
DP2
.5
DP2
.4
DP2
.3
DP2
.2
DP2
.1
DP2
.0
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
DP2.y
Port Direction Register DP2 Bit y
DP2.y = 0: Port line P2.y is an input (high-impedance)
DP2.y = 1: Port line P2.y is an output
ODP2 (F1C2h / E1h)
15
14
13
ESFR
12
11
10
9
8
7
Reset Value: 0000h
6
5
4
3
2
1
0
ODP2 ODP2 ODP2 ODP2 ODP2 ODP2 ODP2 ODP2 ODP2 ODP2 ODP2 ODP2 ODP2 ODP2 ODP2 ODP2
.15
.14
.13
.12
.11
.10
.9
.8
.7
.6
.5
.4
.3
.2
.1
.0
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
ODP2.y
Port 2 Open Drain Control Register Bit y
ODP2.y = 0: Port line P2.y output driver in push/pull mode
ODP2.y = 1: Port line P2.y output driver in open drain mode
12.5.1 - Alternate Functions of Port 2
All Port 2 lines (P2.15...P2.0) serve as capture
inputs or compare outputs (CC15IO...CC0IO) for
the CAPCOM1 unit.
When a Port 2 line is used as a capture input, the
state of the input latch, which represents the state
of the port pin, is directed to the CAPCOM unit via
the line “Alternate Pin Data Input”. If an external
capture trigger signal is used, the direction of the
respective pin must be set to input.
If the direction is set to output, the state of the port
output latch will be read since the pin represents
the state of the output latch.
This can be used to trigger a capture event
through software by setting or clearing the port
latch. Note that in the output configuration, no
external device may drive the pin, otherwise
conflicts would occur.
66/160
When a Port 2 line is used as a compare output
(compare modes 1 and 3), the compare event (or
the timer overflow in compare mode 3) directly
effects the port output latch. In compare mode 1,
when a valid compare match occurs, the state of
the port output latch is read by the CAPCOM
control hardware via the line “Alternate Latch Data
Input”, inverted, and written back to the latch via
the line “Alternate Data Output”.
The port output latch is clocked by the signal
“Compare Trigger” which is generated by the
CAPCOM unit. In compare mode 3, when a match
occurs, the value '1' is written to the port output
latch via the line “Alternate Data Output”. When
an overflow of the corresponding timer occurs, a
'0' is written to the port output latch. In both cases,
the output latch is clocked by the signal “Compare
Trigger”.
ST10F269-T3
The direction of the pin should be set to output by
the user, otherwise the pin will be in the
high-impedance state and will not reflect the state
of the output latch.
As can be seen from the port structure in Figure
26, the user software always has free access to
the port pin even when it is used as a compare
output. This is useful for setting up the initial level
of the pin when using compare mode 1 or the
double-register mode. In these modes, unlike in
compare mode 3, the pin is not set to a specific
value when a compare match occurs, but is
toggled instead.
When the user wants to write to the port pin at the
same time a compare trigger tries to clock the
output latch, the write operation of the user
software has priority. Each time a CPU write
access to the port output latch occurs, the input
multiplexer of the port output latch is switched to
the line connected to the internal bus. The port
output latch will receive the value from the internal
bus and the hardware triggered change will be
lost.
As all other capture inputs, the capture input
function of pins P2.15...P2.0 can also be used as
external interrupt inputs (250ns sample rate at
32MHz CPU clock).
The upper eight Port 2 lines (P2.15...P2.8) also
can serve as Fast External Interrupt inputs from
EX0IN to EX7IN (Fast external interrupt sampling
rate is 31.25ns at 32MHz CPU clock).
P2.15 in addition serves as input for CAPCOM2
timer T7 (T7IN). The Table 15 summarizes the
alternate functions of Port 2.
Table 15 : Alternate Functions of Port 2
Port 2 Pin
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7
P2.8
P2.9
P2.10
P2.11
P2.12
P2.13
P2.14
P2.15
Alternate Function a)
CC0IO
CC1IO
CC2IO
CC3IO
CC4IO
CC5IO
CC6IO
CC7IO
CC8IO
CC9IO
CC10IO
CC11IO
CC12IO
CC13IO
CC14IO
CC15IO
Alternate Function b)
EX0IN
EX1IN
EX2IN
EX3IN
EX4IN
EX5IN
EX6IN
EX7IN
Alternate Function c)
Fast External Interrupt 0 Input
Fast External Interrupt 1 Input
Fast External Interrupt 2 Input
Fast External Interrupt 3 Input
Fast External Interrupt 4 Input
Fast External Interrupt 5 Input
Fast External Interrupt 6 Input
Fast External Interrupt 7 Input
T7IN T7 External Count Input
Figure 25 : Port 2 I/O and Alternate Functions
Alternate Function
Port 2
P2.15
P2.14
P2.13
P2.12
P2.11
P2.10
P2.9
P2.8
P2.7
P2.6
P2.5
P2.4
P2.3
P2.2
P2.1
P2.0
General Purpose
Input / Output
a)
b)
CC15IO
CC14IO
CC13IO
CC12IO
CC11IO
CC10IO
CC9IO
CC8IO
CC7IO
CC6IO
CC5IO
CC4IO
CC3IO
CC2IO
CC1IO
CC0IO
CAPCOM1
Capture Input / Compare Output
c)
EX7IN
EX6IN
EX5IN
EX4IN
EX3IN
EX2IN
EX1IN
EX0IN
Fast External
Interrupt Input
T7IN
CAPCOM2
Timer T7 Input
67/160
ST10F269-T3
The pins of Port 2 combine internal bus data with alternate data output before the port latch input.
Figure 26 : Block Diagram of a Port 2 Pin
Write ODP2.y
Open Drain
Latch
Read ODP2.y
Write DP2.y
Internal Bus
Direction
Latch
Read DP2.y
1
Alternate
Data
Output
Output
Latch
MUX
Output
Buffer
0
Write Port P2.y
P2.y
CCyIO
EXxIN
≥1
Compare Trigger
Read P2.y
Clock
1
MUX
0
Alternate Data Input
Fast External Interrupt Input
68/160
Input
Latch
x = 7...0
y = 15...0
ST10F269-T3
mode by the open drain control register ODP2
(pins P3.15, P3.14 and P3.12 do not support open
drain mode).
Due to pin limitations register bit P3.14 is not
connected to an output pin.
12.6 - Port 3
If this 15-bit port is used for general purpose I/O,
the direction of each line can be configured by the
corresponding direction register DP3. Most port
lines can be switched into push-pull or open drain
P3 (FFC4h / E2h)
15
14
P3.15
-
RW
RW
SFR
13
12
11
10
P3.13 P3.12 P3.11 P3.10
RW
P3.y
RW
RW
RW
Reset Value: 0000h
9
8
7
6
5
4
3
2
1
0
P3.9
P3.8
P3.7
P3.6
P3.5
P3.4
P3.3
P3.2
P3.1
P3.0
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Port Data Register P3 Bit y
DP3 (FFC6h / E3h)
SFR
Reset Value: 0000h
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
DP3
-
DP3
DP3
DP3
DP3
DP3
DP3
DP3
DP3
DP3
DP3
DP3
DP3
DP3
DP3
.13
.12
.11
.10
.9
.8
.7
.6
.5
.4
.3
.2
.1
.0
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
.15
RW
RW
DP3.y
Port Direction Register DP3 Bit y
DP3.y = 0: Port line P3.y is an input (high-impedance)
DP3.y = 1: Port line P3.y is an output
ODP3 (F1C6h / E3h)
ESFR
15
14
13
12
-
-
ODP3
-
.13
RW
RW
ODP3.y
RW
RW
11
10
9
8
7
Reset Value: 0000h
6
5
4
3
2
1
0
ODP3 ODP3 ODP3 ODP3 ODP3 ODP3 ODP3 ODP3 ODP3 ODP3 ODP3 ODP3
.11
.10
.9
.8
.7
.6
.5
.4
.3
.2
.1
.0
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Port 3 Open Drain Control Register Bit y
ODP3.y = 0: Port line P3.y output driver in push-pull mode
ODP3.y = 1: Port line P3.y output driver in open drain mode
69/160
ST10F269-T3
12.6.1 - Alternate Functions of Port 3
The pins of Port 3 serve for various functions which include external timer control lines, the two serial
interfaces and the control lines BHE/WRH and CLKOUT.
Table 16 : Port 3 Alternative Functions
Port 3 Pin
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
P3.8
P3.9
P3.10
P3.11
P3.12
P3.13
P3.14
P3.15
Alternate Function
T0IN
T6OUT
CAPIN
T3OUT
T3EUD
T4IN
T3IN
T2IN
MRST
MTSR
TxD0
RxD0
BHE/WRH
SCLK
--CLKOUT
CAPCOM1 Timer 0 Count Input
Timer 6 Toggle Output
GPT2 Capture Input
Timer 3 Toggle Output
Timer 3 External Up/Down Input
Timer 4 Count Input
Timer 3 Count Input
Timer 2 Count Input
SSC Master Receive / Slave Transmit
SSC Master Transmit / Slave Receive
ASC0 Transmit Data Output
ASC0 Receive Data Input (Output in synchronous mode)
Byte High Enable / Write High Output
SSC Shift Clock Input/Output
No pin assigned
System Clock Output
Figure 27 : Port 3 I/O and Alternate Functions
Alternate Function
No Pin
Port 3
a)
b)
P3.15
CLKOUT
P3.13
P3.12
P3.11
P3.10
P3.9
P3.8
P3.7
P3.6
P3.5
P3.4
P3.3
P3.2
P3.1
P3.0
SCLK
BHE
RxD0
TxD0
MTSR
MRST
T2IN
T3IN
T4IN
T3EUD
T3OUT
CAPIN
T6OUT
T0IN
WRH
General Purpose Input/Output
The structure of the Port 3 pins depends on their
alternate function (see figures 28 and 29). When
the on-chip peripheral associated with a Port 3 pin
is configured to use the alternate input function, it
reads the input latch, which represents the state
of the pin, via the line labeled “Alternate Data
Input”. Port 3 pins with alternate input functions
are: T0IN, T2IN, T3IN, T4IN, T3EUD and CAPIN.
When the on-chip peripheral associated with a
Port 3 pin is configured to use the alternate output
function, its “Alternate Data Output” line is ANDed
70/160
with the port output latch line. When using these
alternate functions, the user must set the direction
of the port line to output (DP3.y=1) and must set
the port output latch (P3.y=1). Otherwise the pin is
in its high-impedance state (when configured as
input) or the pin is stuck at '0' (when the port
output latch is cleared). When the alternate output
functions are not used, the “Alternate Data
Output” line is in its inactive state, which is a high
level ('1').
ST10F269-T3
Port 3 pins with alternate output functions are:
T6OUT, T3OUT, TxD0, BHE and CLKOUT.
When the on-chip peripheral associated with
a Port 3 pin is configured to use both the alternate
input and output function, the descriptions above
apply to the respective current operating mode.
The direction must be set accordingly. Port 3 pins
with alternate input/output functions are: MTSR,
MRST, RxD0 and SCLK.
Note: Enabling the CLKOUT function automatically enables the P3.15 output driver. Setting bit DP3.15=’1’ is not required.
Figure 28 : Block Diagram of Port 3 Pin with Alternate Input or Alternate Output Function
Write ODP3.y
Open Drain
Latch
Internal Bus
Read ODP3.y
Write DP3.y
Direction
Latch
Read DP3.y
Alternate
Data Output
Write DP3.y
Port Output
Latch
Port Data
Output
&
Output
Buffer
P3.y
Read P3.y
Clock
1
MUX
0
Alternate
Data
Input
Input
Latch
y = 13, 11...0
71/160
ST10F269-T3
possibility to program any port latches before.
Thus, the appropriate alternate function is
selected automatically. If BHE/WRH is not used in
the system, this pin can be used for general
purpose I/O by disabling the alternate function
(BYTDIS = ‘1’ / WRCFG=’0’).
Pin P3.12 (BHE/WRH) is another pin with an
alternate output function, however, its structure is
slightly different.
After reset the BHE or WRH function must be
used depending on the system start-up
configuration. In either of these cases, there is no
Figure 29 : Block Diagram of Pins P3.15 (CLKOUT) and P3.12 (BHE/WRH)
Write DP3.x
“1”
1
MUX
Direction
Latch
0
Read DP3.x
Internal Bus
Alternate
Function
Enable
Write P3.x
Alternate
Data
Output
Port Output
Latch
1
MUX
Output
Buffer
0
P3.12/BHE
P3.15/CLKOUT
Read P3.x
Clock
1
MUX
0
Input
Latch
x = 15, 12
Note: Enabling the BHE or WRH function automatically enables the P3.12 output driver. Setting bit
DP3.12=’1’ is not required.
During bus hold pin P3.12 is switched back to its standard function and is then controlled by
DP3.12 and P3.12. Keep DP3.12 = ’0’ in this case to ensure floating in hold mode.
72/160
ST10F269-T3
12.7 - Port 4
If this 8-bit port is used for general purpose I/O, the direction of each line can be configured via the
corresponding direction register DP4.
P4 (FFC8h / E4h)
SFR
Reset Value: --00h
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
P4.7
P4.6
P4.5
P4.4
P4.3
P4.2
P4.1
P4.0
RW
RW
RW
RW
RW
RW
RW
RW
P4.y
Port Data Register P4 Bit y
DP4 (FFCAh / E5h)
SFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
Reset Value: --00h
7
5
4
3
2
1
0
DP4.7 DP4.6 DP4.5 DP4.4 DP4.3 DP4.2 DP4.1 DP4.0
RW
DP4.y
6
RW
RW
RW
RW
RW
RW
RW
Port Direction Register DP4 Bit y
DP4.y = 0: Port line P4.y is an input (high-impedance)
DP4.y = 1: Port line P4.y is an output
For CAN configuration support (see section 15), Port 4 has an open drain function, controlled with the
ODP4 register:
ODP4 (F1CAh / E5h)
ESFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
6
ODP4.7 ODP4.6
RW
ODP4.y
Reset Value: --00h
5
4
3
2
1
0
-
-
-
-
-
-
RW
Port 4 Open Drain Control Register Bit y
ODP4.y = 0: Port line P4.y output driver in push/pull mode
ODP4.y = 1: Port line P4.y output driver in open drain mode if P4.y is not a segment
address line output
Note: Only bit 6 and 7 are implemented, all other bit will be read as “0”.
73/160
ST10F269-T3
The number of segment address lines is selected
via PORT0 during reset. The selected value can
be read from bitfield SALSEL in register RP0H
(read only) in order to check the configuration
during run time.
The CAN interfaces use 2 or 4 pins of Port 4 to
interface each CAN Modules to an external CAN
transceiver. In this case the number of possible
segment address lines is reduced.
The Table 17 summarizes the alternate functions
of Port 4 depending on the number of selected
segment address lines (coded via bitfield
SALSEL)
12.7.1 - Alternate Functions of Port 4
During external bus cycles that use segmentation
(address space above 64K Bytes) a number of
Port 4 pins may output the segment address lines.
The number of pins that is used for segment
address output determines the external address
space which is directly accessible. The other pins
of Port 4 may be used for general purpose I/O. If
segment address lines are selected, the alternate
function of Port 4 may be necessary to access
external memory directly after reset. For this
reason Port 4 will be switched to this alternate
function automatically.
Table 17 : Port 4 Alternate Functions
Standard Function
SALSEL = 01
64K Bytes
Port 4
Alternate Function
SALSEL = 11
256K Bytes
Alternate Function
SALSEL = 00
1M Byte
Alternate Function
SALSEL = 10
16M Bytes
P4.0
GPIO
Segment Address A16
Segment. Address A16
Segment Address A16
P4.1
GPIO
Segment Address A17
Segment Address A17
Segment Address A17
P4.2
GPIO
GPIO
Segment Address A18
Segment Address A18
P4.3
GPIO
GPIO
Segment Address A19
Segment Address A19
P4.4
GPIO/CAN2_RxD
GPIO/CAN2_RxD
GPIO/CAN2_RxD
Segment Address A20
P4.5
GPIO/CAN1_RxD
GPIO/CAN1_RxD
GPIO/CAN1_RxD
Segment Address A21
P4.6
GPIO/CAN1_TxD
GPIO/CAN1_TxD
GPIO/CAN1_TxD
Segment Address A22
P4.7
GPIO/CAN2_TxD
GPIO/CAN2_TxD
GPIO/CAN2_TxD
Segment Address A23
Figure 30 : Port 4 I/O and Alternate Functions
Alternate Function
Port 4
P4.7
P4.6
P4.5
P4.4
P4.3
P4.2
P4.1
P4.0
General Purpose
Input / Output
74/160
b)
a)
A23
A22
A21
A20
A19
A18
A17
A16
Segment Address
Lines
CAN2_TxD
CAN1_TxD
CAN1_RxD
CAN2_RxD
Cans I/O and General Purpose
Input / Output
ST10F269-T3
Figure 31 : Block Diagram of a Port 4 Pin
Write DP4.y
“1”
1
MUX
Direction
Latch
0
Read DP4.y
Internal Bus
Alternate
Function
Enable
Write P4.y
Alternate
Data
Output
Port Output
Latch
1
P4.y
MUX
Output
Buffer
0
Read P4.y
Clock
1
MUX
0
Input
Latch
y = 7...0
75/160
ST10F269-T3
Figure 32 : Block Diagram of P4.4 and P4.5 Pins
Write DP4.x
“1”
1
“0”
MUX
Direction
Latch
1
MUX
0
0
Internal Bus
Read DP4.x
“0”
1
Alternate
Function
Enable
0
Write P4.x
MUX
Alternate
Data
Output
Port Output
Latch
1
P4.x
MUX
0
Output
Buffer
Read P4.x
Clock
1
MUX
0
CANy.RxD
Input
Latch
&
XPERCON.a
(CANyEN)
XPERCON.b
(CANzEN)
76/160
≤1
x = 5, 4
y = 1, 2 (CAN Channel)
z = 2, 1
a = 0, 1
b = 1, 0
ST10F269-T3
Figure 33 : Block Diagram of P4.6 and P4.7 Pins
Write ODP4.x
Open Drain
Latch
1
MUX
Read ODP4.x
"0"
0
Write DP4.x
1
"1"
1
"1"
MUX
MUX
Internal Bus
Direction
Latch
0
0
Read DP4.x
1
"0"
Write P4.x
MUX
Alternate
Function
Enable
0
Alternate
Data
Output
1
1
MUX
Port Output
Latch
MUX
0
0
Output
Buffer
Read P4.x
P4.x
Clock
1
MUX
Input
Latch
0
CANy.TxD
Data output
XPERCON.a
(CANyEN)
x = 6, 7
y = 1, 2 (CAN Channel)
z = 2, 1
a = 0, 1
b = 1, 0
≤1
XPERCON.b
(CANzEN)
12.8 - Port 5
This 16-bit input port can only read data. There is no output latch and no direction register. Data written to
P5 will be lost.
P5 (FFA2h / D1h)
15
14
13
SFR
12
11
10
P5.15 P5.14 P5.13 P5.12 P5.11 P5.10
R
P5.y
R
R
R
R
R
Reset Value: XXXXh
9
8
7
6
5
4
3
2
1
0
P5.9
P5.8
P5.7
P5.6
P5.5
P5.4
P5.3
P5.2
P5.1
P5.0
R
R
R
R
R
R
R
R
R
R
Port Data Register P5 Bit y (Read only)
77/160
ST10F269-T3
shall be used as analog inputs. Some pins of Port
5 also serve as external timer control lines for
GPT1 and GPT2.
12.8.1 - Alternate Functions of Port 5
Each line of Port 5 is also connected to one of the
multiplexer of the Analog/Digital Converter. All
port lines (P5.15...P5.0) can accept analog
signals (AN15...AN0) to be converted by the ADC.
No special programming is required for pins that
The Table 18 summarizes the alternate functions
of Port 5.
Table 18 : Port 5 Alternate Functions
Port 5 Pin
Alternate Function a)
Alternate Function b)
P5.0
Analog Input AN0
-
P5.1
Analog Input AN1
-
P5.2
Analog Input AN2
-
P5.3
Analog Input AN3
-
P5.4
Analog Input AN4
-
P5.5
Analog Input AN5
-
P5.6
Analog Input AN6
-
P5.7
Analog Input AN7
-
P5.8
Analog Input AN8
-
P5.9
Analog Input AN9
-
P5.10
Analog Input AN10
T6EUD
Timer 6 external Up/Down Input
P5.11
Analog Input AN11
T5EUD
Timer 5 external Up/Down Input
P5.12
Analog Input AN12
T6IN
Timer 6 Count Input
P5.13
Analog Input AN13
T5IN
Timer 5 Count Input
P5.14
Analog Input AN14
T4EUD
Timer 4 external Up/Down Input
P5.15
Analog Input AN15
T2EUD
Timer 2 external Up/Down Input
Figure 34 : Port 5 I/O and Alternate Functions
Alternate Function
Port 5
P5.15
P5.14
P5.13
P5.12
P5.11
P5.10
P5.9
P5.8
P5.7
P5.6
P5.5
P5.4
P5.3
P5.2
P5.1
P5.0
General Purpose Inputs
78/160
a)
b)
T2EUD
T4EUD
T5IN
T6IN
T5EUD
T6EUD
AN15
AN14
AN13
AN12
AN11
AN10
AN9
AN8
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
A/D Converter Inputs
Timer Inputs
ST10F269-T3
Port 5 pins have a special port structure (see Figure 35), first because it is an input only port, and second
because the analog input channels are directly connected to the pins rather than to the input latches.
Figure 35 : Block Diagram of a Port 5 Pin
Internal Bus
Channel
Select
Analog
Switch
to Sample + Hold
Circuit
P5.y/ANy
Read Port P5.y
Clock
Input
Latch
Read
Buffer
y = 15...0
12.8.2 - Port 5 Schmitt Trigger Analog Inputs
A Schmitt trigger protection can be activated on each pin of Port 5 by setting the dedicated bit of register
P5DIDIS.
P5DIDIS (FFA4h / D2h)
15
14
13
12
SFR
11
10
9
8
Reset Value: 0000h
7
6
5
4
3
2
1
0
P5DI P5DI P5DI P5DI P5DI P5DI P5DI P5DI P5DI P5DI P5DI P5DI P5DI P5DI P5DI P5DI
DIS.15 DIS.14 DIS.13 DIS.12 DIS.11 DIS.10 DIS.9 DIS.8 DIS.7 DIS.6 DIS.5 DIS.4 DIS.3 DIS.2 DIS.1 DIS.0
RW
RW
RW
P5DIDIS.y
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Port 5 Digital Disable Register Bit y
P5DIDIS.y = 0: Port line P5.y digital input is enabled (Schmitt trigger enabled)
P5DIDIS.y = 1: Port line P5.y digital input is disabled (Schmitt trigger disabled,
necessary for input leakage current reduction)
12.9 - Port 6
If this 8-bit port is used for general purpose I/O, the direction of each line can be configured via the
corresponding direction register DP6. Each port line can be switched into push/pull or open drain mode
via the open drain control register ODP6.
P6 (FFCCh / E6h)
SFR
Reset Value: --00h
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
P6.7
P6.6
P6.5
P6.4
P6.3
P6.2
P6.1
P6.0
RW
RW
RW
RW
RW
RW
RW
RW
P6.y
Port Data Register P6 Bit y
DP6 (FFCEH / E7H)
SFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
Reset Value: --00h
7
6
5
4
3
2
1
0
DP6.7 DP6.6 DP6.5 DP6.4 DP6.3 DP6.2 DP6.1 DP6.0
RW
RW
RW
RW
RW
RW
RW
RW
79/160
ST10F269-T3
DP6.y
Port Direction Register DP6 Bit y
DP6.y = 0: Port line P6.y is an input (high impedance)
DP6.y = 1: Port line P6.y is an output
ODP6 (F1CEH / E7H)
ESFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
5
4
3
2
1
0
ODP6.7 ODP6.6 ODP6.5 ODP6.4 ODP6.3 ODP6.2 ODP6.1 ODP6.0
RW
ODP6.y
6
Reset Value: --00h
RW
RW
RW
RW
RW
RW
RW
Port 6 Open Drain Control Register Bit y
ODP6.y = 0: Port line P6.y output driver in push-pull mode
ODP6.y = 1: Port line P6.y output driver in open drain mode
12.9.1 - Alternate Functions of Port 6
A programmable number of chip select signals (CS4...CS0) derived from the bus control registers
(BUSCON4...BUSCON0) can be output on 5 pins of Port 6.
The number of chip select signals is selected via PORT0 during reset. The selected value can be read
from bit-field CSSEL in register RP0H (read only) in order to check the configuration during run time.
The Table 19 summarizes the alternate functions of Port 6 depending on the number of selected chip
select lines (coded via bit-field CSSEL).
Table 19 : Port 6 Alternate Functions
Port 6
P6.0
P6.1
P6.2
P6.3
P6.4
P6.5
P6.6
P6.7
Alternate Function
CSSEL = 10
Alternate Function
CSSEL = 01
Alternate Function
CSSEL = 00
General
General
General
General
General
Chip select CS0
Chip select CS1
General purpose I/O
General purpose I/O
General purpose I/O
Chip select CS0
Chip select CS1
Chip select CS2
General purpose I/O
General purpose I/O
purpose I/O
purpose I/O
purpose I/O
purpose I/O
purpose I/O
HOLD External hold request input
HLDA Hold acknowledge output
BREQ Bus request output
Figure 36 : Port 6 I/O and Alternate Functions
Alternate Function
Port 6
P6.7
P6.6
P6.5
P6.4
P6.3
P6.2
P6.1
P6.0
General Purpose Input/Output
80/160
a)
BREQ
HLDA
HOLD
CS4
CS3
CS2
CS1
CS0
Alternate Function
CSSEL = 11
Chip
Chip
Chip
Chip
Chip
select
select
select
select
select
CS0
CS1
CS2
CS3
CS4
ST10F269-T3
The chip select lines of Port 6 have an internal
weak pull-up device. This device is switched on
during reset. This feature is implemented to drive
the chip select lines high during reset in order to
avoid multiple chip selection.
After reset the CS function must be used, if
selected so. In this case there is no possibility to
program any port latches before. Thus the
alternate function (CS) is selected automatically in
this case.
Note: The open drain output option can only be
selected via software earliest during the
initialization routine; at least signal CS0
will be in push/pull output driver mode
directly after reset.
Figure 37 : Block Diagram of Port 6 Pins with an Alternate Output Function
Write ODP6.y
Open Drain
Latch
1
MUX
Read ODP6.y
"0"
0
Write DP6.y
"1"
1
MUX
Internal Bus
Direction
Latch
0
Read DP6.y
Alternate
Function
Enable
Write DP6.y
Alternate
Data
Output
Port Output
Latch
1
MUX
Output
Buffer
0
P6.y
Read P6.y
Clock
1
MUX
0
Input
Latch
y = (0...4, 6, 7)
81/160
ST10F269-T3
Figure 38 : Block Diagram of Pin P6.5 (HOLD)
Write ODP6.5
Open Drain
Latch
Read ODP6.5
Internal Bus
Write DP6.5
Direction
Latch
Read DP6.5
Write P6.5
Port Output
Latch
P6.5/HOLD
Output
Buffer
Read P6.5
Clock
1
MUX
0
Alternate Data Input
82/160
Input
Latch
ST10F269-T3
12.10 - Port 7
If this 8-bit port is used for general purpose I/O, the direction of each line can be configured via the
corresponding direction register DP7. Each port line can be switched into push-pull or open drain mode
via the open drain control register ODP7.
P7 (FFD0h / E8h)
SFR
Reset Value: --00h
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
P7.7
P7.6
P7.5
P7.4
P7.3
P7.2
P7.1
P7.0
RW
RW
RW
RW
RW
RW
RW
RW
P7.y
Port Data Register P7 Bit y
DP7 (FFD2h / E9h)
SFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
Reset Value: --00h
7
5
4
3
2
1
0
DP7.7 DP7.6 DP7.5 DP7.4 DP7.3 DP7.2 DP7.1 DP7.0
RW
DP7.y
6
RW
RW
RW
RW
RW
RW
RW
Port Direction Register DP7 Bit y
DP7.y = 0: Port line P7.y is an input (high impedance)
DP7.y = 1: Port line P7.y is an output
ODP7 (F1D2h / E9h)
ESFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
5
4
3
2
1
0
ODP7.7 ODP7.6 ODP7.5 ODP7.4 ODP7.3 ODP7.2 ODP7.1 ODP7.0
RW
ODP7.y
6
Reset Value: --00h
RW
RW
RW
RW
RW
RW
RW
Port 7 Open Drain Control Register Bit y
ODP7.y = 0: Port line P7.y output driver in push-pull mode
ODP7.y = 1: Port line P7.y output driver in open drain mode
83/160
ST10F269-T3
12.10.1 - Alternate Functions of Port 7
The upper 4 lines of Port 7 (P7.7...P7.4) serve as
capture
inputs
or
compare
outputs
(CC31IO...CC28IO) for the CAPCOM2 unit.
The usage of the port lines by the CAPCOM unit,
its accessibility via software and the precautions
are the same as described for the Port 2 lines.
As all other capture inputs, the capture input
function of pins P7.7...P7.4 can also be used as
external interrupt inputs (250ns sample rate at
32MHz CPU clock).
The lower 4 lines of Port 7 (P7.3...P7.0) serve as
outputs
from
the
PWM
module
(POUT3...POUT0).
At these pins the value of the respective port
output latch is EXORed with the value of the PWM
output rather than ANDed, as the other pins do.
This allows to use the alternate output value either
as it is (port latch holds a ‘0’) or to invert its level at
the pin (port latch holds a ‘1’).
Note that the PWM outputs must be enabled via
the respective PENx bit in PWMCON1.
The Table 20 summarizes the alternate functions
of Port 7.
Table 20 : Port 7 Alternate Functions
Port 7
P7.0
P7.1
P7.2
P7.3
P7.4
P7.5
P7.6
P7.7
Alternate Function
POUT0
POUT1
POUT2
POUT3
CC28IO
CC29IO
CC30IO
CC31IO
PWM mode channel 0 output
PWM mode channel 1 output
PWM mode channel 2 output
PWM mode channel 3 output
Capture input / compare output channel 28
Capture input / compare output channel 29
Capture input / compare output channel 30
Capture input / compare output channel 31
Figure 39 : Port 7 I/O and Alternate Functions
Port 7
P7.7
P7.6
P7.5
P7.4
P7.3
P7.2
P7.1
P7.0
General Purpose Input/Output
84/160
CC31IO
CC30IO
CC29IO
CC28IO
POUT3
POUT2
POUT1
POUT0
Alternate Function
ST10F269-T3
The structure of Port 7 differs in the way the output
latches are connected to the internal bus and to
the pin driver. Pins P7.3...P7.0 (POUT3...POUT0)
EXOR the alternate data output with the port latch
output, which allows to use the alternate data
directly or inverted at the pin driver.
Figure 40 : Block Diagram of Port 7 Pins P7.3...P7.0
Write ODP7.y
Open Drain
Latch
Read ODP7.y
Write DP7.y
Internal Bus
Direction
Latch
Read DP7.y
Alternate
Data
Output
Write DP7.y
Port Output
Latch
Port Data
Output
=1
Output
Buffer
EXOR
P7.y/POUTy
Read P7.y
Clock
1
MUX
0
Input
Latch
y = 0...3
85/160
ST10F269-T3
Figure 41 : Block Diagram of Port 7 Pins P7.7...P7.4
Write ODP7.y
Open Drain
Latch
Read ODP7.y
Write DP7.y
Internal Bus
Direction
Latch
Read DP7.y
1
Alternate
Data
Output
Output
Latch
MUX
Output
Buffer
0
Write Port P7.y
Compare Trigger
P7.y
CCzIO
≥1
Read P7.y
Clock
1
MUX
0
Input
Latch
Alternate Latch
Data Input
Alternate Pin
Data Input
86/160
y = (4...7)
z = (28...31)
ST10F269-T3
corresponding direction register DP8. Each port
line can be switched into push/pull or open drain
mode via the open drain control register ODP8.
12.11 - Port 8
If this 8-bit port is used for general purpose I/O,
the direction of each line can be configured via the
P8 (FFD4h / EAh)
SFR
Reset Value: --00h
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
P8.7
P8.6
P8.5
P8.4
P8.3
P8.2
P8.1
P8.0
RW
RW
RW
RW
RW
RW
RW
RW
P8.y
Port Data Register P8 Bit y
DP8 (FFD6h / EBh)
SFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
Reset Value: --00h
7
5
4
3
2
1
0
DP8.7 DP8.6 DP8.5 DP8.4 DP8.3 DP8.2 DP8.1 DP8.0
RW
DP8.y
6
RW
RW
RW
RW
RW
RW
RW
Port Direction Register DP8 Bit y
DP8.y = 0: Port line P8.y is an input (high impedance)
DP8.y = 1: Port line P8.y is an output
ODP8 (F1D6h / EBh)
ESFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
5
4
3
2
1
0
ODP8.7 ODP8.6 ODP8.5 ODP8.4 ODP8.3 ODP8.2 ODP8.1 ODP8.0
RW
ODP8.y
6
Reset Value: --00h
RW
RW
RW
RW
RW
RW
RW
Port 8 Open Drain Control Register Bit y
ODP8.y = 0: Port line P8.y output driver in push-pull mode
ODP8.y = 1: Port line P8.y output driver in open drain mode
87/160
ST10F269-T3
12.11.1 - Alternate Functions of Port 8
The 8 lines of Port 8 serve as capture inputs or as
compare outputs (CC23IO...CC16IO) for the
CAPCOM2 unit.
The usage of the port lines by the CAPCOM unit,
its accessibility via software and the precautions
are the same as described for the Port 2 lines.
As all other capture inputs, the capture input
function of pins P8.7...P8.0 can also be used as
external interrupt inputs (250ns sample rate at
32MHz CPU clock).
The Table 21 summarizes the alternate functions
of Port 8.
Table 21 : Port 8 Alternate Functions
Port 7
Alternate Function
P8.0
CC16IO
Capture input / compare output channel 16
P8.1
CC17IO
Capture input / compare output channel 17
P8.2
CC18IO
Capture input / compare output channel 18
P8.3
CC19IO
Capture input / compare output channel 19
P8.4
CC20IO
Capture input / compare output channel 20
P8.5
CC21IO
Capture input / compare output channel 21
P8.6
CC22IO
Capture input / compare output channel 22
P8.7
CC23IO
Capture input / compare output channel 23
Figure 42 : Port 8 I/O and Alternate Functions
Port 8
P8.7
P8.6
P8.5
P8.4
P8.3
P8.2
P8.1
P8.0
General Purpose Input / Output
88/160
CC23IO
CC22IO
CC21IO
CC20IO
CC19IO
CC18IO
CC17IO
CC16IO
Alternate Function
ST10F269-T3
The structure of Port 8 differs in the way the
output latches are connected to the internal bus
and to the pin driver (see Figure 43). Pins
P8.7...P8.0 (CC23IO...CC16IO) combine internal
bus data and alternate data output before the port
latch input, as do the Port 2 pins.
Figure 43 : Block Diagram of Port 8 Pins P8.7...P8.0
Write ODP8.y
Open Drain
Latch
Read ODP8.y
Write DP8.y
Internal Bus
Direction
Latch
Read DP8.y
1
Alternate
Data
Output
Output
Latch
MUX
Output
Buffer
0
Write Port P8.y
Compare Trigger
P8.y
CCzIO
≥1
Read P8.y
Clock
1
MUX
0
Input
Latch
Alternate Latch
Data Input
Alternate Pin
Data Input
y = (7...0)
z = (16...23)
89/160
ST10F269-T3
13 - A/D CONVERTER
A 10-bit A/D converter with 16 multiplexed input
channels and a sample and hold circuit is
integrated on-chip. The sample time (for loading
the capacitors) and the conversion time is
programmable and can be adjusted to the
external circuitry.
To remove high frequency components from the
analog input signal, a low-pass filter must be connected at the ADC input.
Overrun error detection / protection is controlled
by the ADDAT register. Either an interrupt request
is generated when the result of a previous
conversion has not been read from the result
register at the time the next conversion is
complete, or the next conversion is suspended
until the previous result has been read. For
applications which require less than 16 analog
input channels, the remaining channel inputs can
be used as digital input port pins. The A/D
converter of the ST10F269-T3 supports different
conversion modes:
– Single channel single conversion: the analog
level of the selected channel is sampled once
and converted. The result of the conversion is
stored in the ADDAT register.
– Single channel continuous conversion: the
analog level of the selected channel is repeatedly sampled and converted. The result of the conversion is stored in the ADDAT register.
– Auto scan single conversion: the analog level
of the selected channels are sampled once and
converted. After each conversion the result is
stored in the ADDAT register. The data can be
transferred to the RAM by interrupt software
management or using the powerful Peripheral
Event Controller (PEC) data transfer.
– Auto scan continuous conversion: the analog
level of the selected channels are repeatedly
sampled and converted. The result of the conversion is stored in the ADDAT register. The
data can be transferred to the RAM by interrupt
software management or using the PEC data
transfer.
– Wait for ADDAT read mode: when using continuous modes, in order to avoid to overwrite
the result of the current conversion by the next
one, the ADWR bit of ADCON control register
must be activated. Then, until the ADDAT register is read, the new result is stored in a temporary buffer and the conversion is on hold.
– Channel injection mode: when using
continuous modes, a selected channel can be
converted in between without changing the
current operating mode. The 10-bit data of the
conversion are stored in ADRES field of
ADDAT2. The current continuous mode remains
active after the single conversion is completed.
Table 22 : ADC Sample Clock and Conversion Clock
ADCON 15/14
ADCTC
Conversion Clock tCC
TCL1 = 1/2 x fXTAL
At fCPU = 32MHz
00
TCL x 24
0.375µs
01
Reserved, do not use
10
11
Sample Clock tSC
tSC =
At fCPU = 32MHz
00
tCC
0.375µs 2
Reserved
01
tCC x 2
0.75µs 2
TCL x 96
1.5 µs
10
tCC x 4
1.50µs 2
TCL x 48
0.75 µs
11
tCC x 8
3.00µs 2
Notes: 1. Section 21.4.5 - Direct Drive for TCL definition.
2. tCC = TCL x 24
90/160
ADCON 13/12
ADSTC
ST10F269-T3
14 - SERIAL CHANNELS
Serial communication with other microcontrollers,
microprocessors, terminals or external peripheral
components is provided by two serial interfaces: the
asynchronous / synchronous serial channel (ASCO)
and the high-speed synchronous serial channel
(SSC). Two dedicated Baud rate generators set up
all standard Baud rates without the requirement of
oscillator tuning. For transmission, reception and
erroneous reception, 3 separate interrupt vectors
are provided for each serial channel.
– SOBG for Baud rate generator
14.1 - Asynchronous / Synchronous Serial
Interface (ASCO)
The asynchronous / synchronous serial interface
(ASCO) provides serial communication between
the ST10F269-T6 and other microcontrollers,
microprocessors or external peripherals.
A set of registers is used to configure and to
control the ASCO serial interface:
– P3, DP3, ODP3 for pin configuration
14.1.1 - ASCO in Asynchronous Mode
– SOTBUF for transmit buffer
– SOTIC for transmit interrupt control
– SOTBIC for transmit buffer interrupt control
– SOCON for control
– SORBUF for receive buffer (read only)
– SORIC for receive interrupt control
– SOEIC for error interrupt control
In asynchronous mode, 8 or 9-bit data transfer,
parity generation and the number of stop bit can
be selected. Parity framing and overrun error
detection is provided to increase the reliability of
data transfers. Transmission and reception of data
is double-buffered. Full-duplex communication up
to 1MBauds (at 32MHz of fCPU) is supported in
this mode.
Figure 44 : Asynchronous Mode of Serial Channel ASC0
Reload Register
CPU
Clock
2
S0R
16
Baud Rate Timer
S0M S0STP
S0FE S0PE S0OE
Clock
S0RIR
Receive Interrupt
Request
Serial Port Control
S0TIR
Transmit Interrupt
Request
Shift Clock
S0EIR
Error Interrupt
Request
S0REN
S0FEN
S0PEN
S0OEN
Input
RXD0/P3.11
S0LB
Pin
0
MUX
1
Sampling
Transmit Shift
Register
Receive Shift
Register
Pin
TXD0 / P3.10
Output
Receive Buffer
Register S0RBUF
Transmit Buffer
Register S0TBUF
Internal Bus
91/160
ST10F269-T3
Asynchronous Mode Baud rates
For asynchronous operation, the Baud rate generator provides a clock with 16 times the rate of the
established Baud rate. Every received bit is sampled at the 7th, 8th and 9th cycle of this clock. The Baud
rate for asynchronous operation of serial channel ASC0 and the required reload value for a given Baud
rate can be determined by the following formulas:
fCPU
BAsync =
16 x [2 + (S0BRS)] x [(S0BRL) + 1]
fCPU
S0BRL = (
16 x [2 + (S0BRS)] x BAsync
)-1
(S0BRL) represents the content of the reload register, taken as unsigned 13-bit integer,
(S0BRS) represents the value of bit S0BRS (‘0’ or ‘1’), taken as integer.
Using the above equation, the maximum Baud rate can be calculated for any given clock speed. Baud
rate versus reload register value (SOBRS=0 and SOBRS=1) is described in Table 23.
Table 23 : Commonly Used Baud Rates by Reload Value and Deviation Errors
S0BRS = ‘0’, fCPU = 32MHz
S0BRS = ‘1’, fCPU = 32MHz
Baud Rate (Baud)
Deviation Error
Reload Value
Baud Rate (Baud)
Deviation Error
Reload Value
1000 000
±0.0%
0000h
666 667
±0.0%
0000h
56000
+5.0% / -0.8%
0010h / 001h
56000
+8.2% / -0.8%
000Ah / 000Bh
38400
+0.2% / -3.5%
0019h / 0020h
38400
+2.1% / -3.5%
0010h / 0011h
19200
+0.2% / -1.7%
0033h / 0034h
19200
+2.1% / -0.8%
0021h / 0022h
9600
+0.2% / -0.8%
0067h/ 0068h
9600
+0.6% / -0.8%
0044h / 0045h
4800
+0.5% / -0.3%
00CFh / 00CEh
4800
+0.6% / -0.1%
0089h / 008Ah
2400
+0.2% / -0.1%
019Fh / 01A0h
2400
+0.3% / -0.1%
0114h / 0115h
1200
+0.1% / -0.1%
0340h / 0341h
1200
+0.1% / -0.1%
022Ah / 022Bh
600
+0.1% / -0.1%
0681h / 0682h
600
+0.1% / -0.1%
0456h / 0457h
95
+0.1% / -0.1%
291Dh / 291Eh
75
+0.1% / 0.1%
22B7h / 22B8h
63
+0.1% / -0.1%
2955h / 2956h
Note: The deviation errors given in the Table 23 are rounded. To avoid deviation errors use a Baud rate
crystal (providing a multiple of the ASC0/SSC sampling frequency).
92/160
ST10F269-T3
14.1.2 - ASCO in Synchronous Mode
In synchronous mode, data are transmitted or received synchronously to a shift clock which is generated
by the ST10F269-T3. Half-duplex communication up to 4MBaud (at 32MHz of fCPU) is possible in this
mode.
Figure 45 : Synchronous Mode of Serial Channel ASC0
Reload Register
CPU
Clock
2
S0R
4
Baud Rate Timer
S0M = 000B
S0OE
Clock
S0REN
S0RIR
Receive Interrupt
Request
S0TIR
Transmit Interrupt
Request
S0EIR
Error Interrupt
Request
S0OEN
Output
TDX0/P3.10
S0LB
Pin
Serial Port Control
Shift Clock
Input/Output
RXD0/P3.11 Receive
0
Pin
MUX
1
Transmit
Receive Shift
Register
Transmit Shift
Register
Receive Buffer
Register S0RBUF
Transmit Buffer
Register S0TBUF
Internal Bus
93/160
ST10F269-T3
Synchronous Mode Baud Rates
For synchronous operation, the Baud rate generator provides a clock with 4 times the rate of the
established Baud rate. The Baud rate for synchronous operation of serial channel ASC0 can be
determined by the following formula:
BSync =
fCPU
4 x [2 + (S0BRS)] x [(S0BRL) + 1]
fCPU
S0BRL = (
4 x [2 + (S0BRS)] x BSync
)-1
(S0BRL) represents the content of the reload register, taken as unsigned 13-bit integers,
(S0BRS) represents the value of bit S0BRS (‘0’ or ‘1’), taken as integer.
Using the above equation, the maximum Baud rate can be calculated for any clock speed as given in
Table 24.
Table 24 : Commonly Used Baud Rates by Reload Value and Deviation Errors
S0BRS = ‘0’, fCPU = 32MHz
S0BRS = ‘1’, fCPU = 32MHz
Baud Rate (Baud)
Deviation Error
Reload Value
Baud Rate (Baud)
Deviation Error
Reload Value
4 000 000
±0.0%
0000h
2 666 667
±0.0%
0000h
224 000
+5.0% / -0.8%
0011h / 0012h
224 000
+8.2% / -0.8%
000Bh / 000Ch
112 000
+2.0% / -0.8%
0023h / 0024h
112 000
+3.5% / -0.8%
0017h / 0018h
56 000
+0.6% / -0.8%
0046h / 0047h
56 000
+1.3% / -0.8%
002Fh / 0030h
38 400
+0.2% / -0.85%
0077h / 0078h
38 400
+0.6% / -0.8%
0044h / 0045h
19 200
+0.2% / -0.3%
00BFh / 00C0h
19 200
+0.6% / -0.1%
008Ah / 008Bh
9 600
+0.2% / -0.1%
01A0h/ 01A1h
9 600
+0.3% / -0.1%
0115h / 0116h
4 800
+0.0% / -0.1%
0340h / 0341h
4 800
+0.1% / -0.1%
022Bh / 022Ch
2 400
+0.0% / -0.0%
0682h / 0683h
2 400
+0.0% / -0.1%
0456h / 0457h
1 200
+0.0% / -0.0%
0D04h / 0D05h
1 200
+0.0% / -0.0%
08ACh / 08ADh
600
+0.0% / -0.0%
1A0Ah / 1A0Bh
600
+0.0% / -0.0%
115Bh / 115C7h
490
+0.0% / -0.0%
1FE2h / 1FE3h
320
+0.2%
1FFFh
Note: The deviation errors given in the Table 24 are rounded. To avoid deviation errors use a Baud rate
crystal (providing a multiple of the ASC0/SSC sampling frequency)
94/160
ST10F269-T3
14.2 - High Speed Synchronous Serial Channel
(SSC)
The High-Speed Synchronous Serial Interface
SSC provides flexible high-speed serial
communication between the ST10F269-T3 and
other microcontrollers, microprocessors or
external peripherals.
The SSC supports full-duplex and half-duplex
synchronous communication. The serial clock
signal can be generated by the SSC itself (master
mode) or be received from an external master
(slave mode). Data width, shift direction, clock
polarity and phase are programmable.
This allows communication with SPI-compatible
devices. Transmission and reception of data is
double-buffered. A 16-bit Baud rate generator
provides the SSC with a separate serial clock
signal. The serial channel SSC has its own
dedicated 16-bit Baud rate generator with 16-bit
reload capability, allowing Baud rate generation
independent from the timers.
Figure 46 : Synchronous Serial Channel SSC Block Diagram
CPU
Clock
Slave Clock
Baud Rate Generator
Pin
Clock Control
Shift
Clock
SCLK
Master Clock
Receive Interrupt Request
SSC Control
Block
Transmit Interrupt Request
Error Interrupt Request
Status
Control
Pin
MTSR
Pin
MRST
Pin
Control
16-Bit Shift Register
Receive Buffer
Register SSCRB
Transmit Buffer
Register SSCTB
Internal Bus
95/160
ST10F269-T3
Baud Rate Generation
The Baud rate generator is clocked by fCPU/2. The timer is counting downwards and can be started or
stopped through the global enable bit SSCEN in register SSCCON. Register SSCBR is the dual-function
Baud Rate Generator/Reload register. Reading SSCBR, while the SSC is enabled, returns the content of
the timer. Reading SSCBR, while the SSC is disabled, returns the programmed reload value. In this mode
the desired reload value can be written to SSCBR.
Note Never write to SSCBR, while the SSC is enabled.
The formulas below calculate the resulting Baud rate for a given reload value and the required reload
value for a given Baud rate:
fCPU
Baud rateSSC =
2 x [(SSCBR) + 1]
fCPU
SSCBR = (
)-1
2 x Baud rateSSC
(SSCBR) represents the content of the reload register, taken as unsigned 16-bit integer.
Table 25 lists some possible Baud rates against the required reload values and the resulting bit times for
a 32MHz CPU clock.
Table 25 : Synchronous Baud Rate and Reload Values
Baud Rate
Bit Time
Reload Value
Reserved use a reload value > 0.
---
---
8MBaud
125ns
0001h
4MBaud
250ns
0003h
2MBaud
500ns
0007h
1MBaud
1µs
000Fh
500KBaud
2µs
001Fh
100KBaud
10µs
009Fh
10KBaud
100µs
030Ch
1K Baud
1ms
3E7Fh
244.14 Baud
5.24ms
FFFFh
96/160
ST10F269-T3
15 - CAN MODULES
The two integrated CAN modules (CAN1 and
CAN2) are identical and handle the completely
autonomous transmission and reception of CAN
frames according to the CAN specification V2.0
part B (active).
Each on-chip CAN module can receive and
transmit standard frames with 11-bit identifiers as
well as extended frames with 29-bit identifiers.
These two CAN modules are both identical to the
CAN module of the ST10F167.
Because of duplication of the CAN controllers, the
following adjustments are to be considered:
– Same internal register addresses of both CAN
controllers, but with base addresses differing in
address bit A8; separate chip select for each
CAN module. Refer to Chapter 4 - Memory Organization.
– The CAN1 transmit line (CAN1_TxD) is the
alternate function of the Port P4.6 pin and the
receive line (CAN1_RxD) is the alternate
function of the Port P4.5 pin.
– The CAN2 transmit line (CAN2_TxD) is the
alternate function of the Port P4.7 pin and the
receive line (CAN2_RxD) is the alternate
function of the Port P4.4 pin.
– Interrupt request line of the CAN1 module is
connected to the XBUS interrupt line XP0,
interrupt of the CAN2 module is connected to
the line XP1.
– The CAN modules must be selected with
corresponding CANxEN bit of XPERCON register
before the bit XPEN of SYSCON register is set.
– The reset default configuration is: CAN1 is
enabled, CAN2 is disabled.
15.1 - CAN Modules Memory Mapping
15.1.1 - CAN1
Address range 00’EF00h - 00’EFFFh is reserved
for the CAN1 Module access. CAN1 is enabled by
setting XPEN bit 2 of the SYSCON register and by
setting bit 0 of the XPERCON register. Accesses
to the CAN Module use demultiplexed addresses
and a 16-bit data bus (Byte accesses are
possible). Two wait states give an access time of
125ns at 32MHz CPU clock. No tri-state wait
states are used.
15.1.2 - CAN2
Address range 00’EE00h - 00’EEFFh is reserved
for the CAN2 Module access. CAN2 is enabled by
setting XPEN bit 2 of the SYSCON register and by
setting bit 1 of the XPERCON register. Accesses
to the CAN Module use demultiplexed addresses
and a 16-bit data bus (Byte accesses are
possible). Two wait states give an access time of
125ns at 32MHz CPU clock. No tri-state wait
states are used.
Note: If one or both CAN modules is used,
Port 4 cannot be programmed to output all
8 segment address lines. Thus, only
4 segment address lines can be used,
reducing the external memory space to
5M Bytes (1M Byte per CS line).
15.2 - CAN Bus Configurations
Depending on application, CAN bus configuration
may be one single bus with a single or multiple
interfaces or a multiple bus with a single or
multiple interfaces. The ST10F269-T3 is able to
support these 2 cases.
Single CAN Bus
The single CAN Bus multiple interfaces
configuration may be implemented using 2 CAN
transceivers as shown in Figure 47.
Figure 47 : Single CAN Bus Multiple Interfaces,
Multiple Transceivers
CAN1
RxD TxD
CAN2
RxD TxD
CAN
Transceiver
CAN
Transceiver
CAN_H
CAN_H
CAN bus
97/160
ST10F269-T3
The ST10F269-T3 also supports single CAN Bus
multiple (dual) interfaces using the open drain
option of the CANx_TxD output as shown in
Figure 48. Thanks to the OR-Wired Connection,
only one transceiver is required. In this case the
design of the application must take in account the
wire length and the noise environment.
Multiple CAN Bus
The ST10F269-T3 provides 2 CAN interfaces to
support such kind of bus configuration as shown
in Figure 49.
Figure 49 : Connection to Two Different CAN
Buses (e.g. for gateway application)
Figure 48 : Single CAN Bus, Dual Interfaces,
Single Transceiver
CAN2
RxD TxD
CAN1
RxD TxD
*
*
CAN bus
* Open drain output
98/160
CAN
Transceiver
CAN
Transceiver
CAN_H
CAN_H
CAN_H
CAN_H
CAN2
RxD TxD
+5V
2.7kΩ
CAN
Transceiver
CAN1
RxD TxD
CAN
bus 1
CAN
bus 2
ST10F269-T3
16 - REAL TIME CLOCK
The Real Time Clock is an independent timer,
which clock is directly derived from the clock
oscillator on XTAL1 input so that it can keep on
running even in Idle or Power down mode (if
enabled to). Registers access is implemented
onto the XBUS. This module is designed for the
following purposes:
– Generate the current time and date for the system
– Cyclic time based interrupt, provides Port
2 external interrupts every second and every
n seconds (n is programmable) if enabled.
– 58-bit timer for long term measurement
– Capable to exit the ST10 chip from power down
mode (if PWDCFG of SYSCON set) after a programmed delay.
The real time clock is base on two main blocks of
counters. The first block is a prescaler which
generates a basic reference clock (for example a
1 second period). This basic reference clock is
coming out of a 20-bit DIVIDER (4-bit MSB
RTCDH counter and 16-bit LSB RTCDL counter).
This 20-bit counter is driven by an input clock
derived from the on-chip high frequency CPU
clock, predivided by a 1/64 fixed counter (see
Figure 51). This 20-bit counter is loaded at each
basic reference clock period with the value of the
20-bit PRESCALER register (4-bit MSB RTCPH
register and 16-bit LSB RTCPL register). The
value of the 20-bit RTCP register determines the
period of the basic reference clock.
A timed interrupt request (RTCSI) may be sent on
each basic reference clock period. The second
block of the RTC is a 32-bit counter (16-bit RTCH
and 16-bit RTCL). This counter may be initialized
with the current system time. RTCH/RTCL counter
is driven with the basic reference clock signal. In
order to provide an alarm function the contents of
RTCH/RTCL counter is compared with a 32-bit
alarm register (16-bit RTCAH register and 16-bit
RTCAL register). The alarm register may be
loaded with a reference date. An alarm interrupt
request (RTCAI), may be generated when the
value of RTCH/RTCL counter matches the
reference date of RTCAH/RTCAL register.
The timed RTCSI and the alarm RTCAI interrupt
requests can trigger a fast external interrupt via
EXISEL register of port 2 and wake-up the ST10
chip when running power down mode. Using the
RTCOFF bit of RTCCON register, the user may
switch off the clock oscillator when entering the
power down mode.
Figure 50 : ESFRs and Port Pins Associated with the RTC
EXISEL
-
-
-
-
-
CCxIC
- - - Y Y Y Y - - - -
-
-
-
-
-
- - - Y Y Y Y Y Y Y Y
EXISEL External Interrupt Source Selection register (Port 2)
1 second timed interrupt request (RTCSI) triggers firq[2] and alarm interrupt request (RTCAI) triggers firq[3]
RTC data and control registers are implemented onto the XBUS.
Figure 51 : RTC Block Diagram
Clock Oscillator
RTCAI RTCSI
RTCCON
AlarmIT
Programmable ALARM Register
RTCAH
RTCAL
Basic Clock IT
Programmable PRESCALER Register
RTCPH
Reload
=
RTCH
RTCPL
RTCL
32 bit COUNTER
RTCDH
RTCDL
/64
20 bit DIVIDER
99/160
ST10F269-T3
16.1 - RTC registers
16.1.1 - RTCCON: RTC Control Register
The functions of the RTC are controlled by the RTCCON control register. If the RTOFF bit is set, the RTC
dividers and counters clock is disabled and registers can be written, when the ST10 chip enters power
down mode the clock oscillator will be switch off. The RTC has 2 interrupt sources, one is triggered every
basic clock period, the other one is the alarm.
RTCCON includes an interrupt request flag and an interrupt enable bit for each of them. This register is
read and written via the XBUS.
RTCCON (EC00h)
XBUS
Reset Value: --00h
15
14
13
12
11
10
9
8
7
6
5
4
-
-
-
-
-
-
-
-
RTCOFF
-
-
-
3
2
1
0
RTCAEN RTCAIR RTCSEN RTCSIR
RW
RW
RW
RW
RW
RTCOFF 2
RTC Switch Off Bit
‘0’: clock oscillator and RTC keep on running even if ST10 in power down mode
‘1’: clock oscillator is switch off if ST10 enters power down mode, RTC dividers and
counters are stopped and registers can be written
RTCAEN 2
RTC Alarm Interrupt ENable
‘0’: RTCAI is disabled
‘1’: RTCAI is enabled, it is generated every n seconds
RTCAIR 1
RTC Alarm Interrupt Request flag (when the alarm is triggered)
‘0’: the bit was reseted less than a n seconds ago
‘1’: the interrupt was triggered
RTCSEN 2
RTC Second interrupt ENable
‘0’: RTCSI is disabled
‘1’: RTCSI is enabled, it is generated every second
RTCSIR 1
RTC Second Interrupt Request flag (every second)
‘0’: the bit was reseted less than a second ago
‘1’: the interrupt was triggered
Notes: 1. As RTCCON register is not bit-addressable, the value of these bits must be read by checking their associated CCxIC register.
The 2 RTC interrupt signals are connected to Port2 in order to trigger an external interrupt that wake up the chip when in power down
mode.
2. All the bit of RTCCON are active high.
100/160
ST10F269-T3
16.1.2 - RTCPH & RTCPL: RTC PRESCALER Registers
The 20-bit programmable prescaler divider is loaded with 2 registers.
The 4 most significant bit are stored into RTCPH and the 16 Less significant bit are stored in RTCPL. In
order to keep the system clock, those registers are not reset.
They are write protected by bit RTOFF of RTCCON register, write operation is allowed if RTOFF is set.
RTCPL (EC06h)
15
14
XBUS
13
12
11
10
9
8
Reset Value: XXXXh
7
6
5
4
3
2
1
0
RTCPL
RW
RTCPH (EC08h)
15
14
XBUS
13
12
11
10
9
8
Reset Value: ---Xh
7
6
5
4
3
2
RESERVED
1
0
RTCPH
RW
Figure 52 : PRESCALER Register
3
2
1
0
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
RTCPL
RTCPH
19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
20 bit word counter
The value stored into RTCPH, RTCPL is called RTCP (coded on 20-bit). The dividing ratio of the
Prescaler divider is: ratio = 64 x (RTCP)
16.1.3 - RTCDH & RTCDL: RTC DIVIDER Counters
Every basic reference clock the DIVIDER counters are reloaded with the value stored RTCPH and
RTCPL registers. To get an accurate time measurement it is possible to read the value of the DIVIDER,
reading the RTCDH, RTCDL. Those counters are read only. After any bit changed in the programmable
PRESCALER register, the new value is loaded in the DIVIDER.
RTCDL (EC0Ah)
15
14
13
XBUS
12
11
10
9
8
7
Reset Value: XXXXh
6
5
4
3
2
1
0
RTCDL
R
RTCDH (EC0Ch)
15
14
13
XBUS
12
11
10
9
8
7
RESERVED
Reset Value: ---Xh
6
5
4
3
2
1
0
RTCDH
R
Note: Those registers are not reset, and are read only.
101/160
ST10F269-T3
When RTCD increments to reach 00000h, The 20-bit word stored into RTCPH, RTCPL registers is loaded
in RTCD.
Figure 53 : DIVIDER Counters
3
2
1
0
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
RTCDL
RTCDH
19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
20 bit word internal value of the Prescaler divider
Bit 15 to bit 4 of RTCPH and RTCDH are not used. When reading, the return value of those bit will be
zeros.
16.1.4 - RTCH & RTCL: RTC Programmable COUNTER Registers
The RTC has 2 x 16-bit programmable counters which count rate is based on the basic time reference (for
example 1 second). As the clock oscillator may be kept working, even in power down mode, the RTC
counters may be used as a system clock. In addition RTC counters and registers are not modified at any
system reset. The only way to force their value is to write them via the XBUS.
Those counters are write protected as well. The bit RTOFF of the RTCCON register must be set (RTC
dividers and counters are stopped) to enable a write operation on RTCH or RTCL.
A write operation on RTCH or RTCL register loads directly the corresponding counter. When reading, the
current value in the counter (system date) is returned.
The counters keeps on running while the clock oscillator is working.
RTCL (EC0Eh)
15
14
13
XBUS
12
11
10
9
8
7
Reset Value: XXXXh
6
5
4
3
2
1
0
RTCL
RW
RTCH (EC10h)
15
14
13
XBUS
12
11
10
9
8
7
RTCH
RW
Note: Those registers are nor reset
102/160
Reset Value: XXXXh
6
5
4
3
2
1
0
ST10F269-T3
16.1.5 - RTCAH & RTCAL: RTC ALARM Registers
When the programmable counters reach the 32-bit value stored into RTCAH & RTCAL registers, an alarm
is triggered and the interrupt request RTAIR is generated. Those registers are not protected.
RTCAL (EC12h)
15
14
XBUS
13
12
11
10
9
8
Reset Value: XXXXh
7
6
5
4
3
2
1
0
RTCAL
RW
RTCAH (EC14h)
15
14
XBUS
13
12
11
10
9
8
Reset Value: XXXXh
7
6
5
4
3
2
1
0
RTCAH
RW
Note: Those registers are not reset
16.2 - Programming the RTC
RTC interrupt request signals are connected to Port2, pad 10 (RTCSI) and pad 11 (RTCAI). An alternate
function Port2 is to generate fast interrupts firq[7:0]. To trigger firq[2] and firq[3] the following configuration
has to be set.
EXICON ESFR controls the external interrupt edge selection, RTC interrupt requests are rising edge
active.
EXICON (F1C0h)
15
14
ESFR
13
12
11
10
9
8
EXI7ES
EXI6ES
EXI5ES
EXI4ES
RW
RW
RW
RW
Reset Value: 0000h
7
6
EXI3ES
12
5
4
EXI2ES
RW
13
3
2
1
0
EXI1ES
EXI0ES
RW
RW
RW
Notes: 1. EXI2ES and EXI3ES must be configured as "01b" because RCT interrupt request lines are rising edge active.
2. Alarm interrupt request line (RTCAI) is linked with EXI3ES.
3. Timed interrupt request line (RTCSI) is linked with EXI2ES.
EXISEL ESFR enables the Port2 alternate sources. RTC interrupts are alternate sources 2 and 3.
EXISEL (F1DAh)
15
14
ESFR
13
12
11
10
9
8
Reset Value: 0000h
7
6
5
4
3
2
1
0
EXI7SS
EXI6SS
EXI5SS
EXI4SS
EXI3SS 2
EXI2SS 3
EXI1SS
EXI0SS
RW
RW
RW
RW
RW
RW
RW
RW
EXIxSS
External Interrupt x Source Selection (x=7...0)
‘00’: Input from associated Port 2 pin.
‘01’: Input from “alternate source”. 1
‘10’: Input from Port 2 pin ORed with “alternate source”. 1
‘11’: Input from Port 2 pin ANDed with “alternate source”.
Notes: 1. Advised configuration.
2. Alarm interrupt request (RTCAI) is linked with EXI3SS.
3. Timed interrupt request (RTCSI) is linked with EXI2SS.
103/160
ST10F269-T3
Interrupt control registers are common with CAPCOM1 Unit: CC10IC (RTCSI) and CC11IC (RTCAI).
CCxIC
SFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
Reset Value: --00h
7
6
5
CCxIR CCxIE
RW
RW
4
3
2
1
0
ILVL
GLVL
RW
RW
CC10IC: FF8Ch/C6h
CC11IC: FF8Eh/C7h
Source of interrupt
Request Flag
Enable Flag
Interrupt Vector
Vector Location
Trap Number
External interrupt 2
CC10IR
CC10IE
CC10INT
00’0068h
1Ah/26
External interrupt 3
CC11IR
CC11IE
CC11INT
00’006Ch
1Bh/27
104/160
ST10F269-T3
17 - WATCHDOG TIMER
The Watchdog Timer is a fail-safe mechanism which prevents the microcontroller from malfunctioning for
long periods of time.
The Watchdog Timer is always enabled after a reset of the chip and can only be disabled in the time
interval until the EINIT (end of initialization) instruction has been executed.
Therefore, the chip start-up procedure is always monitored. The software must be designed to service the
watchdog timer before it overflows. If, due to hardware or software related failures, the software fails to do
so, the watchdog timer overflows and generates an internal hardware reset. It pulls the RSTOUT pin low
in order to allow external hardware components to be reset.
Each of the different reset sources is indicated in the WDTCON register.
The indicated bits are cleared with the EINIT instruction. The origin of the reset can be identified during
the initialization phase.
WDTCON (FFAEh / D7h)
15
14
13
12
11
SFR
10
9
8
WDTREL
7
6
-
-
RW
WDTIN
Reset Value: 00xxh
5
4
3
PONR LHWR SHWR
HR
HR
HR
2
SWR
HR
1
0
WDTR WDTIN
HR
RW
Watchdog Timer Input Frequency Selection
‘0’: Input Frequency is fCPU/2.
‘1’: Input Frequency is fCPU/128.
WDTR1-3
Watchdog Timer Reset Indication Flag
Set by the watchdog timer on an overflow.
Cleared by a hardware reset or by the SRVWDT instruction.
SWR1-3
Software Reset Indication Flag
Set by the SRST execution.
Cleared by the EINIT instruction.
SHWR1-3
Short Hardware Reset Indication Flag
Set by the input RSTIN.
Cleared by the EINIT instruction.
LHWR
1-3
Long Hardware Reset Indication Flag
Set by the input RSTIN.
Cleared by the EINIT instruction.
PONR
1- 2-3
Power-On (Asynchronous) Reset Indication Flag
Set by the input RSTIN if a power-on condition has been detected.
Cleared by the EINIT instruction.
Notes: 1. More than one reset indication flag may be set. After EINIT, all flags are cleared.
2. Power-on is detected when a rising edge from VDD = 0 V to VDD > 2.0 V is recognized on the internal 2.7V supply.
3. These bits cannot be directly modified by software.
105/160
ST10F269-T3
The PONR flag of WDTCON register is set if the output voltage of the internal 2.7V supply falls below the
threshold (typically 2V) of the power-on detection circuit. This circuit is efficient to detect major failures of
the external 5V supply but if the internal 2.7V supply does not drop under 2 volts, the PONR flag is not
set. This could be the case on fast switch-off / switch-on of the 5V supply. The time needed for such a
sequence to activate the PONR flag depends on the value of the capacitors connected to the supply and
on the exact value of the internal threshold of the detection circuit.
Table 26 : WDTCON Bit Value on Different Resets
Reset Source
Power On Reset
Power on after partial supply failure
PONR
LHWR
SHWR
SWR
X
X
X
X
1) 2)
X
X
X
X
X
X
X
X
Long Hardware Reset
Short Hardware Reset
Software Reset
X
Watchdog Reset
X
WDTR
X
Notes: 1. PONR bit may not be set for short supply failure.
2. For power-on reset and reset after supply partial failure, asynchronous reset must be used.
In case of bi-directional reset is enabled, and if the RSTIN pin is latched low after the end of the internal
reset sequence, then a Short hardware reset, a software reset or a watchdog reset will trigger a Long
hardware reset. Thus, Reset Indications flags will be set to indicate a Long Hardware Reset.
The Watchdog Timer is 16-bit, clocked with the system clock divided by 2 or 128. The high Byte of the
watchdog timer register can be set to a pre-specified reload value (stored in WDTREL).
Each time it is serviced by the application software, the high byte of the watchdog timer is reloaded. For
security, rewrite WDTCON each time before the watchdog timer is serviced
The Table 27 shows the watchdog time range for 32MHz CPU clock.
Table 27 : WDTREL Reload Value
Prescaler for fCPU = 32MHz
Reload value in WDTREL
2 (WDTIN = ‘0’)
128 (WDTIN = ‘1’)
FFh
16.0µs
1.024ms
00h
4.096ms
262.1ms
The watchdog timer period is calculated with the following formula:
P
WD T
106/160
1
= --------------- × 512 × ( 1 + [ W DTIN ] × 63 ) × ( 256 – [ W DTREL ] )
f
CPU
ST10F269-T3
18 - SYSTEM RESET
System reset initializes the MCU in a predefined state. There are five ways to activate a reset state. The
system start-up configuration is different for each case as shown in Table 28.
Table 28 : Reset Event Definition
Reset Source
Short-cut
Power-on reset
Conditions
Long Hardware reset (synchronous & asynchronous)
PONR
LHWR
Power-on
t RSTIN > 1040 TCL
Short Hardware reset (synchronous reset)
SHWR
Watchdog Timer reset
Software reset
WDTR
SWR
4 TCL < t RSTIN < 1038 TCL
WDT overflow
SRST execution
18.1 - Long Hardware Reset
The reset is triggered when RSTIN pin is pulled low, then the MCU is immediately forced in reset default
state. It pulls low RSTOUT pin, it cancels pending internal hold states if any, it aborts external bus cycle, it
switches buses (data, address and control signals) and I/O pin drivers to high-impedance, it pulls high PORT0
pins and the reset sequence starts.
To get a long hardware reset, the duration of the external RSTIN signal must be longer than 1040 TCL.
The level of RPD pin is sampled during the whole RSTIN pulse duration. A low level on RPD pin
determines an asynchronous reset while a high level leads to a synchronous reset.
Note
A reset can be entered as synchronous and exit as asynchronous if VRPD voltage drops below the
RPD pin threshold (typically 2.5V for VDD = 5V) when RSTIN pin is low or when RSTIN pin is
internally pulled low.
18.1.1 - Asynchronous Reset
Figure 54 and Figure 55 show asynchronous reset condition (RPD pin is at low level).
Figure 54 : Asynchronous Reset Sequence External Fetch
1
2
3
4
5
6
7
8
9
CPU Clock
6 or 8 TCL1)
RSTIN
Asynchronous
Reset Condition
RPD
RSTOUT
5 TCL
ALE
RD
PORT0
Internal reset
Reset Configuration
1st Instruction External Fetch
Latching point of PORT0
for system start-up
configuration
EXTERNAL FETCH
Note: 1) RSTIN rising edge to internal latch of PORT0 is 3 CPU clock cycles (6 TCL) if the PLL is bypassed and the prescaler is on
(fCPU = fXTAL / 2), else it is 4 CPU clock cycles (8 TCL).
107/160
ST10F269-T3
Figure 55 : Asynchronous Reset Sequence Internal Fetch
1
2
3
CPU Clock
6 or 8 TCL 1)
RSTIN
Asynchronous
Reset Condition
Flash under reset for internal charge pump ramping up
2.5µs max.2)
RPD
RSTOUT
PORT0
Reset Configuration
Latching point of PORT0
for PLL configuration
PLL factor
latch command
Latching point of PORT0
for remaining bits
Internal reset signal
INTERNAL FETCH
Flash read signal
1st fetch
from Flash
Note: 1) RSTIN rising edge to internal latch of PORT0 is 3 CPU clock cycles (6 TCL) if the PLL is bypassed and the prescaler is on
(fCPU = fXTAL / 2), else it is 4 CPU clock cycles (8 TCL).
2) 2.1µs typical value.
Power-on reset
The asynchronous reset must be used during the power-on of the MCU. Depending on the crystal frequency,
the on-chip oscillator needs about 10ms to 50ms to stabilize. The logic of the MCU does not need a stabilized
clock signal to detect an asynchronous reset, so it is suitable for power-on conditions. To ensure a proper
reset sequence, the RSTIN pin and the RPD pin must be held at low level until the MCU clock signal is
stabilized and the system configuration value on PORT0 is settled.
Hardware reset
The asynchronous reset must be used to recover from catastrophic situations of the application. It may be
triggered by the hardware of the application. Internal hardware logic and application circuitry are
described in Section 18.6 - Reset Circuitry and Figure 58, Figure 59 and Figure 60.
18.1.2 - Synchronous Reset (RSTIN pulse > 1040TCL and RPD pin at high level)
The synchronous reset is a warm reset. It may be generated synchronously to the CPU clock. To be
detected by the reset logic, the RSTIN pulse must be low at least for 4 TCL (2 periods of CPU clock).
Then the I/O pins are set to high impedance and RSTOUT pin is driven low. After the RSTIN level is
detected, a short duration of 12 TCL (6 CPU clocks) maximum elapses, during which pending internal
hold states are cancelled and the current internal access cycle, if any, is completed. External bus cycle is
aborted.
The internal pull-down of RSTIN pin is activated if bit BDRSTEN of SYSCON register was previously set
by software. This bit is always cleared on power-on or after any reset sequence.
The internal sequence lasts for 1024 TCL (512 periods of CPU clock). After this duration the pull-down of
RSTIN pin for the bidirectional reset function is released and the RSTIN pin level is sampled. At this step
the sequence lasts 1040 TCL (4 TCL + 12 TCL + 1024 TCL). If the RSTIN pin level is low, the reset
sequence is extended until RSTIN level becomes high. Refer to Figure 56
Note If VRPD voltage drops below the RPD pin threshold (typically 2.5V for VDD = 5V) when RSTIN pin
is low or when RSTIN pin is internally pulled low, the ST10 reset circuitry disables the bidirectional
reset function and RSTIN pin is no more pulled low. The reset is processed as an asynchronous
reset.
108/160
ST10F269-T3
Figure 56 : Synchronous Reset Sequence External Fetch (RSTIN pulse > 1040 TCL)
4 TCL
min.
12 TCL
max.
6 or 8 TCL1)
1
2
3
4
5
6
7
8
9
CPU Clock
1024 TCL
Internally pulled low 2)
RSTIN
RPD
200µA Discharge
RSTOUT
If VRPD > 2.5V Asynchronous
3)
Reset is not entered.
5 TCL
ALE
RD
PORT0
Reset Configuration
Latching point of PORT0
Internal reset signal
Note
for system start-up configuration
1) RSTIN rising edge to internal latch of PORT0 is 3 CPU clock cycles (6 TCL) if the PLL is bypassed and the prescaler is on
(fCPU = fXTAL / 2), else it is 4 CPU clock cycles (8 TCL).
2) RSTIN pin is pulled low if bit BDRSTEN (bit 3 of SYSCON register) was previously set by software. Bit BDRSTEN is cleared after
reset.
3) If during the reset condition (RSTIN low), VRPD voltage drops below the threshold voltage (typically 2.5V for 5V operation), the
ST10 reset circuitry disables the bidirectional reset function and RSTIN pin is no more pulled low.
18.1.3 - Exit of Long Hardware Reset
- If the RPD pin level is low when the RSTIN pin is sampled high, the MCU completes an
asynchronous reset sequence.
- If the RPD pin level is high when the RSTIN pin is sampled high, the MCU completes a
synchronous reset sequence.
The system configuration is latched from PORT0 after a duration of 8 TCL / 4 CPU clocks (6 TCL / 3 CPU
clocks if PLL is bypassed) and in case of external fetch, ALE, RD and R/W pins are driven to their inactive
level. The MCU starts program execution from memory location 00'0000h in code segment 0. This
starting location will typically point to the general initialization routine. Refer to Table 29 for PORT0
latched configuration.
18.2 - Short Hardware Reset
A short hardware reset is a warm reset. It may be generated synchronously to the CPU clock
(synchronous reset).
The short hardware is triggered when RSTIN signal duration is shorter or equal to 1038 TCL, the
RPD pin must be pulled high.
To properly activate the internal reset logic of the MCU, the RSTIN pin must be held low, at least, during 4
TCL (2 periods of CPU clock). The I/O pins are set to high impedance and RSTOUT pin is driven low. After
RSTIN level is detected, a short duration of 12 TCL (6 CPU clocks) maximum elapses, during which
pending internal hold states are cancelled and the current internal access cycle if any is completed.
External bus cycle is aborted. The internal pull-down of RSTIN pin is activated if bit BDRSTEN of
SYSCON register was previously set by software. This bit is always cleared on power-on or after any
reset sequence.
The internal reset sequence starts for 1024 TCL (512 periods of CPU clock).
After that duration the pull-down of RSTIN pin for the bidirectional reset function is released and the
RSTIN pin level is sampled high while RPD level is high.
109/160
ST10F269-T3
The short hardware reset ends and the MCU restarts.To be processed as a short hardware reset, the
external RSTIN signal must last a maximum of 1038 TCL (4 TCL + 10 TCL + 1024 TCL). The system
configuration is latched from PORT0 after a duration of 8 TCL / 4 CPU clocks (6 TCL / 3 CPU clocks if PLL
is bypassed) and in case of external fetch, ALE, RD and R/W pins are driven to their inactive level.
Program execution starts from memory location 00'0000h in code segment 0. This starting location will
typically point to the general initialization routine. Timings of synchronous reset sequence are
summarized in Figure 57. Refer to Table 29 for PORT0 latched configuration.
Note - If the RSTIN pin level is sampled low, the reset sequence is extended until RSTIN level becomes
high leading to a long hardware reset (synchronous or asynchronous reset) because RSTIN
signal duration has lasted longer than 1040TCL.
- If the VRPD voltage has dropped below the RPD pin threshold, the reset is processed as an
asynchronous reset.
Figure 57 : Synchronous Warm Reset Sequence External Fetch (4 TCL < RSTIN pulse < 1038 TCL)
4 TCL 10 TCL 2)
min.
min.
6 or 8 TCL4)
1024 TCL
1
2
3
4
5
6
7
8
9
CPU Clock
1)
Internally pulled low 3)
RSTIN
RPD
200µA Discharge
RSTOUT
If VRPD > 2.5V Asynchronous
5)
Reset is not entered.
5 TCL
ALE
RD
PORT0
1st Instr.
Reset Configuration
Latching point of PORT0
Internal reset signal
Note
for system start-up configuration
1) RSTIN assertion can be released there.
2) Maximum internal synchronization is 6 CPU cycles (12 TCL).
3) RSTIN pin is pulled low if bit BDRSTEN (bit 3 of SYSCON register) was previously set by software. Bit BDRSTEN is cleared after
reset.
4) RSTIN rising edge to internal latch of PORT0 is 3 CPU clock cycles (6 TCL) if the PLL is bypassed and the prescaler is on
(fCPU = fXTAL / 2), else it is 4 CPU clock cycles (8 TCL).
5) If during the reset condition (RSTIN low), VRPD voltage drops below the threshold voltage (typically 2.5V for 5V operation), the
ST10 reset circuitry disables the bidirectional reset function and RSTIN pin is no more pulled low.
18.3 - Software Reset
The reset sequence can be triggered at any time using the protected instruction SRST (software reset).
This instruction can be executed deliberately within a program, for example to leave bootstrap loader
mode, or upon a hardware trap that reveals a system failure.
Upon execution of the SRST instruction, the internal reset sequence (1024 TCL) is started. The
microcontroller behavior is the same as for a short hardware reset, except that only P0.12...P0.6 bits are
latched at the end of the reset sequence, while previously latched values of P0.5...P0.2 are cleared.
18.4 - Watchdog Timer Reset
When the watchdog timer is not disabled during the initialization or when it is not regularly serviced during
program execution it will overflow and it will trigger the reset sequence.
110/160
ST10F269-T3
Unlike hardware and software resets, the watchdog reset completes a running external bus cycle if this
bus cycle either does not use READY, or if READY is sampled active (low) after the programmed wait
states. When READY is sampled inactive (high) after the programmed wait states the running external
bus cycle is aborted. Then the internal reset sequence (1024 TCL) is started. The microcontroller
behaviour is the same as for a short hardware reset, except that only P0.12...P0.6 bits are latched, while
previously latched values of P0.5...P0.2 are cleared.
18.5 - RSTOUT, RSTIN, Bidirectional Reset
18.5.1 - RSTOUT Pin
The RSTOUT pin is driven active (low level) at the beginning of any reset sequence (synchronous/
asynchronous hardware, software and watchdog timer resets). RSTOUT pin stays active low beyond the
end of the initialization routine, until the protected EINIT instruction (End of Initialization) is completed.
18.5.2 - Bidirectional Reset
The bidirectional reset function is enabled by setting SYSCON.BDRSTEN (bit 3). This function is disabled
by any reset sequence which always clears the SYSCON.BDRSTEN bit.
It can only be enabled during the initial is at ion routine, before EINIT instruction is completed.
If VRPD voltage drops below the RPD pin threshold (typically 2.5V for VDD = 5V) when RSTIN pin is low or
when RSTIN pin is internally pulled low, the ST10 reset circuitry disables the bidirectional reset function
and RSTIN pin is no more pulled low. The reset is processed as an asynchronous reset.
The bidirectional reset function is useful for external peripherals with on-chip memory because the reset
signal output on RSTIN pin is de-activated before the CPU starts its first instruction fetch.
18.5.3 - RSTIN pin
When the bidirectional reset function is enabled, the open-drain of the RSTIN pin is activated, pulling
down the reset signal, for the duration of the internal reset sequence. See Figure 56 and Figure 57. At the
end of the sequence the pull-down is released and the RSTIN pin gets back its input function.
The bidirectional reset function can be used:
– to convert SW or WD resets to a hardware reset so that the configuration can be (re-)latched from PORT0.
– to make visible SW or WDT resets at RSTIN pin whenever RSTIN is the only reset signal used by the
application (RSTOUT not used).
– to get a deactivated reset signal before CPU starts its first instruction fetch.
The configuration latched from PORT0 is determined by the kind of reset generated by the application.
(Refer to Table 29).
Converting a SW or WDT reset to a hardware reset allows the PLL to re-lock or the PLL configuration to
be re-latched, provided a SW or WDT reset is generated by the application program is case of PLL unlock
or input clock fail.
18.6 - Reset Circuitry
The internal reset circuitry is described in Figure 58.
An internal pull-up resistor is implemented on RSTIN pin. (50kΩ minimum, to 250kΩ maximum). The
minimum reset time must be calculated using the lowest value. In addition, a programmable pull-down
(SYSCON.BDRSTEN bit 3) drives the RSTIN pin according to the internal reset state. The RSTOUT pin
provides a signals to the application. (Refer to Section 18.5 - RSTOUT, RSTIN, Bidirectional Reset).
A weak internal pull-down is connected to the RPD pin to discharge external capacitor to VSS at a rate of
100µA to 200µA. This Pull-down is turned on when RSTIN pin is low
If bit PWDCFG of SYSCON register is set, an internal pull-up resistor is activated at the end of the reset
sequence. This pull-up charges the capacitor connected to RPD pin.
If the bidirectional reset function is not used, the simplest way to reset ST10F269-T3 is to connect
external components as shown in Figure 59. It works with reset from application (hardware or manual)
and with power-on. The value of C1 capacitor, connected on RSTIN pin with internal pull-up resistor
(50kΩ to 250kΩ), must lead to a charging time long enough to let the internal or external oscillator and /
or the on-chip PLL to stabilize.
111/160
ST10F269-T3
The R0-C0 components on RPD pin are mainly implemented to provide a time delay to exit Power down
mode (see Chapter 19 - Power Reduction Modes). Nevertheless, they drive RPD pin level during resets
and they lead to different reset modes as explained hereafter. On power-on, C0 is totally discharged, a
low level on RPD pin forces an asynchronous hardware reset. C0 capacitor starts to charge through R0
and at the end of reset sequence ST10F269-T3 restarts. RPD pin threshold is typically 2.5V.
Depending on the delay of the next applied reset, the MCU can enter a synchronous reset or an
asynchronous reset. If RPD pin is below 2.5V an asynchronous reset starts, if RPD pin is above 2.5V a
synchronous reset starts. (See Section 18.1 - Long Hardware Reset and Section 18.2 - Short Hardware
Reset).
Note that an internal pull-down is connected to RPD pin and can drive a 100µA to 200µA current. This
Pull-down is turned on when RSTIN pin is low.
To properly use the bidirectional reset features, the schematic (or equivalent) of Figure 60 must be
implemented. R1-C1 only work for power-on or manual reset in the same way as explained previously. D1
diode brings a faster discharge of C1 capacitor at power-off during repetitive switch-on / switch-off
sequences. D2 diode performs an OR-wired connection, it can be replaced with an open drain buffer. R2
resistor may be added to increase the pull-up current to the open drain in order to get a faster rise time on
RSTIN pin when bidirectional function is activated.
The start-up configurations and some system features are selected on reset sequences as described in
Table 29 and Table 30.
Table 29 describes what is the system configuration latched on PORT0 in the five different reset ways.
Table 30 summarizes the state of bits of PORT0 latched in RP0H, SYSCON, BUSCON0 registers.
Figure 58 : Internal (simplified) Reset Circuitry.
EINIT Instruction
Clr
Q
RSTOUT
Set
Reset State
Machine
Clock
Internal
Reset
Signal
VDD
SRST instruction
watchdog overflow
Trigger
RSTIN
Clr
BDRSTEN
Reset Sequence
(512 CPU Clock Cycles)
VDD
Asynchronous
Reset
RPD
From/to Exit
Powerdown
Circuit
112/160
Weak pull-down
(~200µA)
ST10F269-T3
Figure 59 : Minimum External Reset Circuitry
VDD
R0
RSTIN
RPD
+
External
Hardware
RSTOUT
ST10F269
+
b)
a)
a) Manual hardware reset1
b) For automatic power-up and
interruptible power-down mode
C1
C0
Figure 60 : External Reset Hardware Circuitry
VDD
VDD
VDD
External
Hardware
RSTIN
RSTOUT
R0
R2
ST10F269
D1
R1
D2
RPD
+
+
C0
C1
Open - drain
External
Inverter
Reset Source
Table 29 : PORT0 Latched Configuration for the Different Resets
P0H.5
P0H.4
P0H.3
P0H.2
P0H.1
P0H.0 WR config.
P0L.7
P0L.6
P0L.5 Reserved
P0L.4 BSL
P0L.3 Reserved
P0L.2 Reserved
P0L.1 Adapt Mode
P0L.0 Emu Mode
-
-
-
X
X
X
X
X
X
X
-
-
-
-
-
-
Watchdog Reset
-
-
-
X
X
X
X
X
X
X
-
-
-
-
-
-
-: Pin is not sampled
Sample event
Bus Type
P0H.6 Clock Options
Software Reset
X: Pin is sampled
Chip Selects
P0H.7
Segm. Addr. Lines
PORT0
Short Hardware Reset
-
-
-
X
X
X
X
X
X
X
X
X
X
X
X
X
Long Hardware Reset
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Power-On Reset
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Table 30 : PORT0 Bits Latched into the Different Registers After Reset
PORT0 bit
nber
h7
h6
h5
h4
h3
h2
PORT0 bit CLKCFG CLKCFG CLKCFG SALSEL SALSEL CSSEL
Name
RP0H 2
SYSCON
BUSCON0
Internal
Logic
X1
X1
X1
X1
X1
X1
X
1
X
1
X
1
X
1
1
1
X
1
X
1
X
1
X
1
To Clock Generator
X
-
To Port 4 Logic
X
BUS
ACT0 4
h1
h0
CSSEL
WRC
X1
BYTDIS
ALE
CTL0 4
To Port 6 Logic
3
I7
I6
BUSTYP BUSTYP
I5
I4
I3
I2
I1
I0
R
BSL
R
R
ADP
EMU
X1
CLKCFG CLKCFG CLKCFG SALSEL SALSEL CSSEL CSSEL WRC
X1
WRCFG 3
X1
-
BTYP
BTYP
X1
X1
X1
X1
X1
X1
X1
X1
X1
1
1
1
1
1
X1
X
X1
X
Internal
X
X1
X
X1
X
Internal Internal
Notes: 1. Not latched from PORT0.
2. Only RP0H low byte is used and the bit-fields are latched from PORT0 high byte to RP0H low byte.
3. Indirectly depend on PORT0.
4. Bits set if EA pin is 1.
113/160
ST10F269-T3
19 - POWER REDUCTION MODES
Two different power reduction modes with
different levels of power reduction have been
implemented in the ST10F269-T3. In Idle mode
only CPU is stopped, while peripheral still operate.
In Power Down mode both CPU and peripherals
are stopped.
Both mode are software activated by a protected
instruction and are terminated in different ways as
described in the following sections.
Note: All external bus actions are completed
before Idle or Power Down mode is
entered. However, Idle or Power Down
mode is not entered if READY is enabled,
but has not been activated (driven low for
negative polarity, or driven high for
positive polarity) during the last bus
access.
19.1 - Idle Mode
Idle mode is entered by running IDLE protected
instruction. The CPU operation is stopped and the
peripherals still run.
Idle mode is terminate by any interrupt request.
Whatever the interrupt is serviced or not, the
instruction following the IDLE instruction will be
executed after return from interrupt (RETI)
instruction, then the CPU resumes the normal
program.
Note that a PEC transfer keep the CPU in Idle
mode. If the PEC transfer does not succeed, the
Idle mode is terminated. Watchdog timer must be
properly programmed to avoid any disturbance
during Idle mode.
19.2 - Power Down Mode
Power Down mode starts by running PWRDN
protected instruction. Internal clock is stopped, all
MCU parts are on hold including the watchdog
timer.
There are two different operating Power Down
modes: protected mode and interruptible mode.
The internal RAM contents can be preserved
through the voltage supplied via the VDD pins. To
verify RAM integrity, some dedicated patterns
may be written before entering the Power Down
114/160
mode and have to be checked after Power Down
is resumed.
It is mandatory to keep VDD = +5V ±10% during
power-down mode, because the on-chip
voltage regulator is turned in power saving
mode and it delivers 2.5V to the core logic, but
it must be supplied at nominal VDD = +5V.
19.2.1 - Protected Power Down Mode
This mode is selected when PWDCFG (bit 5) of
SYSCON register is cleared. The Protected
Power Down mode is only activated if the NMI pin
is pulled low when executing PWRDN instruction
(this means that the PWRD instruction belongs to
the NMI software routine). This mode is only
deactivated with an external hardware reset on
RSTIN pin.
Note: During power down the on-chip voltage
regulator automatically lowers the internal
logic supply voltage to 2.5V, to save power
and to keep internal RAM and registers
contents.
19.2.2 - Interruptible Power Down Mode
This mode is selected when PWDCFG (bit 5) of
SYSCON register is set (See Chapter 20 - Special
Function Register Overview).
The Interruptible Power Down mode is only
activated if all the enabled Fast External Interrupt
pins are in their inactive level (see EXICON
register description below).
This mode is deactivated with an external reset
applied to RSTIN pin or with an interrupt request
applied to one of the Fast External Interrupt pins.
To allow the internal PLL and clock to stabilize,
the RSTIN pin must be held low according
the recommendations described in Chapter 18 System Reset.
ST10F269-T3
EXICON (F1C0h / E0h
15
14
13
ESFR
12
11
10
9
8
Reset Value: 0000h
7
6
5
4
3
2
1
0
EXI7ES
EXI6ES
EXI5ES
EXI4ES
EXI3ES
EXI2ES
EXI1ES
EXI0ES
RW
RW
RW
RW
RW
RW
RW
RW
EXIxES(x=7...0)
External Interrupt x Edge Selection Field (x=7...0)
0 0:
Fast external interrupts disabled: standard mode
EXxIN pin not taken in account for entering/exiting Power Down mode.
0 1:
Interrupt on positive edge (rising)
Enter Power Down mode if EXiIN = ‘0’, exit if EXxIN = ‘1’ (referred as ‘high’ active level)
1 0:
Interrupt on negative edge (falling)
Enter Power Down mode if EXiIN = ‘1’, exit if EXxIN = ‘0’ (referred as ‘low’ active level)
1 1:
Interrupt on any edge (rising or falling)
Always enter Power Down mode, exit if EXxIN level changed.
EXxIN inputs are normally sampled interrupt
inputs. However, the Power Down mode circuitry
uses them as level-sensitive inputs.
This signal enables the internal oscillator and PLL
circuitry, and also turns on the weak pull-down
(see Figure 62).
An EXxIN (x = 3...0) Interrupt Enable bit (bit
CCxIE in respective CCxIC register) need not be
set to bring the device out of Power Down mode.
An external RC circuit must be connected to RPD
pin, as shown in the Figure 61.
The discharge of the external capacitor provides a
delay that allows the oscillator and PLL circuits to
stabilize before the internal CPU and Peripheral
clocks are enabled. When the RPD voltage drops
below the threshold voltage (about 2.5V), the
Schmitt trigger clears Q2 flip-flop, thus enabling
the CPU and Peripheral clocks, and the device
resumes code execution.
Figure 61 : External R0C0 Circuit on RPD Pin For
Exiting Powerdown Mode with External Interrupt
VDD
ST10F269-Q3
R0
220kΩ minimum
RPD
+
C0
1µF Typical
If the Interrupt was enabled (bit CCxIE=’1’ in the
respective CCxIC register) before entering Power
Down mode, the device executes the interrupt
service routine, and then resumes execution after
the PWRDN instruction (see note below).
If the interrupt was disabled, the device executes
the instruction following PWRDN instruction, and
the Interrupt Request Flag (bit CCxIR in the
respective CCxIC register) remains set until it is
cleared by software.
Note:
To exit Power Down mode with an external
interrupt, an EXxIN (x = 7...0) pin has to be
asserted for at least 40ns.
Due to the internal pipeline, the
instruction that follows the PWRDN
instruction is executed before the CPU
performs a call of the interrupt service
routine when exiting power-down mode
115/160
ST10F269-T3
Figure 62 : Simplified Powerdown Exit Circuitry
VDD
D Q
Q1
cdQ
enter
PowerDown
stop pll
stop oscillator
VDD
Pull-up
RPD
Weak Pull-down
(~ 200µA)
external
interrupt
reset
VDD
CPU and Peripherals clocks
D Q
Q2
cdQ
System clock
Figure 63 : Powerdown Exit Sequence When Using an External Interrupt (PLL x 2)
XTAL1
CPU clk
Internal
Powerdown
signal
External
Interrupt
RPD
ExitPwrd
(internal)
~ 2.5 V
delay for oscillator/pll
stabilization
116/160
ST10F269-T3
20 - SPECIAL FUNCTION REGISTER OVERVIEW
The following table lists all SFRs which are
implemented in the ST10F269-T3 in alphabetical
order. Bit-addressable SFRs are marked with the
letter “b” in column “Name”. SFRs within the
Extended SFR-Space (ESFRs) are marked with
the letter “E” in column “Physical Address”.
A SFR can be specified by its individual
mnemonic name. Depending on the selected
addressing mode, a SFR can be accessed via its
physical address (using the Data Page Pointers),
or via its short 8-bit address (without using the
Data Page Pointers).
The reset value is defined as following:
X : Means the full nibble is not defined at reset.
x : Means some bits of the nibble are not
defined at reset.
Table 31 : Special Function Registers Listed by Name
Physical
address
Name
8-bit
address
Description
Reset
value
ADCIC
b
FF98h
CCh
A/D Converter end of Conversion Interrupt Control Register
- - 00h
ADCON
b
FFA0h
D0h
A/D Converter Control Register
0000h
50h
A/D Converter Result Register
0000h
50h
A/D Converter 2 Result Register
0000h
ADDAT
FEA0h
ADDAT2
F0A0h
ADDRSEL1
FE18h
0Ch
Address Select Register 1
0000h
ADDRSEL2
FE1Ah
0Dh
Address Select Register 2
0000h
ADDRSEL3
FE1Ch
0Eh
Address Select Register 3
0000h
ADDRSEL4
E
FE1Eh
0Fh
Address Select Register 4
0000h
ADEIC
b
FF9Ah
CDh
A/D Converter Overrun Error Interrupt Control Register
- - 00h
BUSCON0
b
FF0Ch
86h
Bus Configuration Register 0
0xx0h
BUSCON1
b
FF14h
8Ah
Bus Configuration Register 1
0000h
BUSCON2
b
FF16h
8Bh
Bus Configuration Register 2
0000h
BUSCON3
b
FF18h
8Ch
Bus Configuration Register 3
0000h
BUSCON4
b
FF1Ah
8Dh
Bus Configuration Register 4
0000h
CAPREL
FE4Ah
25h
GPT2 Capture/Reload Register
0000h
CC0
FE80h
40h
CAPCOM Register 0
0000h
FF78h
BCh
CAPCOM Register 0 Interrupt Control Register
- - 00h
FE82h
41h
CAPCOM Register 1
0000h
FF7Ah
BDh
CAPCOM Register 1 Interrupt Control Register
- - 00h
FE84h
42h
CAPCOM Register 2
0000h
FF7Ch
BEh
CAPCOM Register 2 Interrupt Control Register
- - 00h
FE86h
43h
CAPCOM Register 3
0000h
FF7Eh
BFh
CAPCOM Register 3 Interrupt Control Register
- - 00h
CC0IC
b
CC1
CC1IC
b
CC2
CC2IC
b
CC3
CC3IC
b
CC4
CC4IC
b
CC5
CC5IC
b
CC6
CC6IC
b
CC7
CC7IC
b
CC8
CC8IC
b
FE88h
44h
CAPCOM Register 4
0000h
FF80h
C0h
CAPCOM Register 4 Interrupt Control Register
- - 00h
FE8Ah
45h
CAPCOM Register 5
0000h
FF82h
C1h
CAPCOM Register 5 Interrupt Control Register
- - 00h
FE8Ch
46h
CAPCOM Register 6
0000h
FF84h
C2h
CAPCOM Register 6 Interrupt Control Register
- - 00h
FE8Eh
47h
CAPCOM Register 7
0000h
FF86h
C3h
CAPCOM Register 7 Interrupt Control Register
- - 00h
FE90h
48h
CAPCOM Register 8
0000h
FF88h
C4h
CAPCOM Register 8 Interrupt Control Register
- - 00h
117/160
ST10F269-T3
Table 31 : Special Function Registers Listed by Name (continued)
Physical
address
Name
CC9
CC9IC
b
CC10
CC10IC
b
CC11
CC11IC
b
CC12
CC12IC
b
CC13
CC13IC
b
CC14
CC14IC
b
CC15
CC15IC
b
CC16
CC16IC
CC18
CC18IC
CC19
CC19IC
b
b
b
b
b
b
118/160
CAPCOM Register 11
0000h
FF8Eh
C7h
CAPCOM Register 11 Interrupt Control Register
- - 00h
FE98h
4Ch
CAPCOM Register 12
0000h
FF90h
C8h
CAPCOM Register 12 Interrupt Control Register
- - 00h
FE9Ah
4Dh
CAPCOM Register 13
0000h
FF92h
C9h
CAPCOM Register 13 Interrupt Control Register
- - 00h
FE9Ch
4Eh
CAPCOM Register 14
0000h
- - 00h
FF94h
CAh
CAPCOM Register 14 Interrupt Control Register
FE9Eh
4Fh
CAPCOM Register 15
0000h
FF96h
CBh
CAPCOM Register 15 Interrupt Control Register
- - 00h
F160h
30h
CAPCOM Register 16
0000h
E
B0h
CAPCOM Register 16 Interrupt Control Register
- - 00h
F162h
31h
CAPCOM Register 17
0000h
E
B1h
CAPCOM Register 17 Interrupt Control Register
- - 00h
F164h
32h
CAPCOM Register 18
0000h
E
B2h
CAPCOM Register 18 Interrupt Control Register
- - 00h
33h
CAPCOM Register 19
0000h
F166h
B3h
CAPCOM Register 19 Interrupt Control Register
- - 00h
34h
CAPCOM Register 20
0000h
B4h
CAPCOM Register 20 Interrupt Control Register
- - 00h
35h
CAPCOM Register 21
0000h
B5h
CAPCOM Register 21 Interrupt Control Register
- - 00h
36h
CAPCOM Register 22
0000h
B6h
CAPCOM Register 22 Interrupt Control Register
- - 00h
37h
CAPCOM Register 23
0000h
E
B7h
CAPCOM Register 23 Interrupt Control Register
- - 00h
38h
CAPCOM Register 24
0000h
E
B8h
CAPCOM Register 24 Interrupt Control Register
- - 00h
39h
CAPCOM Register 25
0000h
E
B9h
CAPCOM Register 25 Interrupt Control Register
- - 00h
3Ah
CAPCOM Register 26
0000h
E
BAh
CAPCOM Register 26 Interrupt Control Register
- - 00h
3Bh
CAPCOM Register 27
0000h
BBh
CAPCOM Register 27 Interrupt Control Register
- - 00h
3Ch
CAPCOM Register 28
0000h
BCh
CAPCOM Register 28 Interrupt Control Register
- - 00h
3Dh
CAPCOM Register 29
0000h
C2h
CAPCOM Register 29 Interrupt Control Register
- - 00h
E
F168h
E
F16Ah
E
F16Ch
E
F16Eh
F170h
F172h
F174h
F176h
E
FE78h
b
CC29
CC29IC
4Bh
FE76h
CC28
CC28IC
FE96h
FE74h
b
CC27
CC27IC
- - 00h
FE72h
b
CC26
CC26IC
0000h
CAPCOM Register 10 Interrupt Control Register
FE70h
b
CC25
CC25IC
CAPCOM Register 10
C6h
FE6Eh
CC24
CC24IC
4Ah
FF8Ch
FE6Ch
CC23
CC23IC
FE94h
FE6Ah
CC22
CC22IC
0000h
- - 00h
FE68h
CC21
CC21IC
CAPCOM Register 9
CAPCOM Register 9 Interrupt Control Register
FE66h
CC20
CC20IC
49h
C5h
FE64h
b
F178h
E
FE7Ah
b
Reset
value
FF8Ah
FE62h
b
Description
FE92h
FE60h
b
CC17
CC17IC
8-bit
address
F184h
E
ST10F269-T3
Table 31 : Special Function Registers Listed by Name (continued)
Physical
address
Name
CC30
CC30IC
8-bit
address
FE7Ch
b
CC31
F18Ch
Description
Reset
value
3Eh
CAPCOM Register 30
0000h
E
C6h
CAPCOM Register 30 Interrupt Control Register
- - 00h
3Fh
CAPCOM Register 31
0000h
E
CAh
CAPCOM Register 31 Interrupt Control Register
- - 00h
FE7Eh
CC31IC
b
F194h
CCM0
b
FF52h
A9h
CAPCOM Mode Control Register 0
0000h
CCM1
b
FF54h
AAh
CAPCOM Mode Control Register 1
0000h
CCM2
b
FF56h
ABh
CAPCOM Mode Control Register 2
0000h
CCM3
b
FF58h
ACh
CAPCOM Mode Control Register 3
0000h
CCM4
b
FF22h
91h
CAPCOM Mode Control Register 4
0000h
CCM5
b
FF24h
92h
CAPCOM Mode Control Register 5
0000h
CCM6
b
FF26h
93h
CAPCOM Mode Control Register 6
0000h
CCM7
b
FF28h
94h
CAPCOM Mode Control Register 7
0000h
FE10h
08h
CPU Context Pointer Register
FC00h
FF6Ah
B5h
GPT2 CAPREL Interrupt Control Register
- - 00h
CP
CRIC
b
CSP
04h
CPU Code Segment Pointer Register (read only)
0000h
DP0L
b
FE08h
F100h
E
80h
P0L Direction Control Register
- - 00h
DP0H
b
F102h
E
81h
P0h Direction Control Register
- - 00h
DP1L
b
F104h
E
82h
P1L Direction Control Register
- - 00h
E
DP1H
b
F106h
83h
P1h Direction Control Register
- - 00h
DP2
b
FFC2h
E1h
Port 2 Direction Control Register
0000h
DP3
b
FFC6h
E3h
Port 3 Direction Control Register
0000h
DP4
b
FFCAh
E5h
Port 4 Direction Control Register
00h
DP6
b
FFCEh
E7h
Port 6 Direction Control Register
00h
DP7
b
FFD2h
E9h
Port 7 Direction Control Register
00h
DP8
b
FFD6h
EBh
Port 8 Direction Control Register
00h
DPP0
FE00h
00h
CPU Data Page Pointer 0 Register (10-bit)
0000h
DPP1
FE02h
01h
CPU Data Page Pointer 1 Register (10-bit)
0001h
DPP2
FE04h
02h
CPU Data Page Pointer 2 Register (10-bit)
0002h
DPP3
FE06h
03h
CPU Data Page Pointer 3 Register (10-bit)
0003h
E
E0h
External Interrupt Control Register
0000h
EXICON
b
EXISEL
b
F1C0h
F1DAh
E
EDh
External Interrupt Source Selection Register
0000h
IDCHIP
F07Ch
E
3Eh
Device Identifier Register (n is the device revision)
10Dnh
IDMANUF
F07Eh
E
3Fh
Manufacturer Identifier Register
0401h
IDMEM
F07Ah
E
3Dh
On-chip Memory Identifier Register
3040h
F078h
E
IDPROG
3Ch
Programming Voltage Identifier Register
0040h
IDX0
b
FF08h
84h
MAC Unit Address Pointer 0
0000h
IDX1
b
FF0Ah
85h
MAC Unit Address Pointer 1
0000h
MAH
FE5Eh
2Fh
MAC Unit Accumulator - High Word
0000h
MAL
FE5Ch
2Eh
MAC Unit Accumulator - Low Word
0000h
MCW
b
FFDCh
EEh
MAC Unit Control Word
0000h
MDC
b
FF0Eh
87h
CPU Multiply Divide Control Register
0000h
MDH
FE0Ch
06h
CPU Multiply Divide Register – High Word
0000h
MDL
FE0Eh
07h
CPU Multiply Divide Register – Low Word
0000h
119/160
ST10F269-T3
Table 31 : Special Function Registers Listed by Name (continued)
Physical
address
Name
8-bit
address
Description
Reset
value
MRW
b
FFDAh
EDh
MAC Unit Repeat Word
0000h
MSW
b
FFDEh
EFh
MAC Unit Status Word
0200h
ODP2
b
F1C2h
E
E1h
Port 2 Open Drain Control Register
0000h
ODP3
b
F1C6h
E
E3h
Port 3 Open Drain Control Register
0000h
ODP4
b
F1CAh
E
E5h
Port 4 Open Drain Control Register
- - 00h
ODP6
b
F1CEh
E
E7h
Port 6 Open Drain Control Register
- - 00h
ODP7
b
F1D2h
E
E9h
Port 7 Open Drain Control Register
- - 00h
ODP8
b
F1D6h
E
EBh
Port 8 Open Drain Control Register
- - 00h
ONES
b
FF1Eh
8Fh
Constant Value 1’s Register (read only)
FFFFh
P0L
b
FF00h
80h
PORT0 Low Register (Lower half of PORT0)
- - 00h
P0H
b
FF02h
81h
PORT0 High Register (Upper half of PORT0)
- - 00h
P1L
b
FF04h
82h
PORT1 Low Register (Lower half of PORT1)
- - 00h
P1H
b
FF06h
83h
PORT1 High Register (Upper half of PORT1)
- - 00h
P2
b
FFC0h
E0h
Port 2 Register
0000h
P3
b
FFC4h
E2h
Port 3 Register
0000h
P4
b
FFC8h
E4h
Port 4 Register (8-bit)
P5
b
FFA2h
D1h
Port 5 Register (read only)
XXXXh
P6
b
FFCCh
E6h
Port 6 Register (8-bit)
- - 00h
P7
b
FFD0h
E8h
Port 7 Register (8-bit)
- - 00h
P8
b
FFD4h
EAh
Port 8 Register (8-bit)
- - 00h
P5DIDIS
b
FFA4h
D2h
Port 5 Digital Disable Register
0000h
00h
POCON0L
F080h
E
40h
PORT0 Low Outpout Control Register (8-bit)
- - 00h
POCON0H
F082h
E
41h
PORT0 High Output Control Register (8-bit)
- - 00h
POCON1L
F084h
E
42h
PORT1 Low Output Control Register (8-bit)
- - 00h
POCON1H
F086h
E
43h
PORT1 High Output Control Register (8-bit)
- - 00h
POCON2
F088h
E
44h
Port2 Output Control Register
0000h
POCON3
F08Ah
E
45h
Port3 Output Control Register
0000h
POCON4
F08Ch
E
46h
Port4 Output Control Register (8-bit)
- - 00h
POCON6
F08Eh
E
47h
Port6 Output Control Register (8-bit)
- - 00h
POCON7
F090h
E
48h
Port7 Output Control Register (8-bit)
- - 00h
POCON8
F092h
E
49h
Port8 Output Control Register (8-bit)
- - 00h
POCON20
F0AAh
E
55h
ALE, RD, WR Output Control Register (8-bit)
0000h
PECC0
FEC0h
60h
PEC Channel 0 Control Register
0000h
PECC1
FEC2h
61h
PEC Channel 1 Control Register
0000h
PECC2
FEC4h
62h
PEC Channel 2 Control Register
0000h
PECC3
FEC6h
63h
PEC Channel 3 Control Register
0000h
PECC4
FEC8h
64h
PEC Channel 4 Control Register
0000h
PECC5
FECAh
65h
PEC Channel 5 Control Register
0000h
PECC6
FECCh
66h
PEC Channel 6 Control Register
0000h
67h
PEC Channel 7 Control Register
0000h
E2h
Port Input Threshold Control Register
- - 00h
PECC7
PICON
120/160
FECEh
b
F1C4h
E
ST10F269-T3
Table 31 : Special Function Registers Listed by Name (continued)
Physical
address
Name
8-bit
address
Description
Reset
value
PP0
F038h
E
1Ch
PWM Module Period Register 0
0000h
PP1
F03Ah
E
1Dh
PWM Module Period Register 1
0000h
PP2
F03Ch
E
1Eh
PWM Module Period Register 2
0000h
PP3
F03Eh
E
1Fh
PWM Module Period Register 3
0000h
88h
CPU Program Status Word
0000h
PSW
b
FF10h
PT0
F030h
E
18h
PWM Module Up/Down Counter 0
0000h
PT1
F032h
E
19h
PWM Module Up/Down Counter 1
0000h
PT2
F034h
E
1Ah
PWM Module Up/Down Counter 2
0000h
PT3
F036h
E
1Bh
PWM Module Up/Down Counter 3
0000h
PW0
FE30h
18h
PWM Module Pulse Width Register 0
0000h
PW1
FE32h
19h
PWM Module Pulse Width Register 1
0000h
PW2
FE34h
1Ah
PWM Module Pulse Width Register 2
0000h
PW3
FE36h
1Bh
PWM Module Pulse Width Register 3
0000h
98h
PWM Module Control Register 0
0000h
PWMCON0
b
FF30h
PWMCON1
b
FF32h
99h
PWM Module Control Register 1
0000h
PWMIC
b
F17Eh
E
BFh
PWM Module Interrupt Control Register
- - 00h
QR0
F004h
E
02h
MAC Unit Offset Register QR0
0000h
QR1
F006h
E
03h
MAC Unit Offset Register QR1
0000h
QX0
F000h
E
00h
MAC Unit Offset Register QX0
0000h
QX1
F002h
E
01h
MAC Unit Offset Register QX1
0000h
F108h
E
84h
System Start-up Configuration Register (read only)
- - XXh
FEB4h
5Ah
Serial Channel 0 Baud Rate Generator Reload Register
0000h
FFB0h
D8h
Serial Channel 0 Control Register
0000h
FF70h
B8h
Serial Channel 0 Error Interrupt Control Register
- - 00h
FEB2h
59h
Serial Channel 0 Receive Buffer Register (read only)
- - XXh
RP0H
b
S0BG
S0CON
b
S0EIC
b
S0RBUF
S0RIC
b
FF6Eh
S0TBIC
b
F19Ch
S0TBUF
S0TIC
b
SP
SSCBR
B7h
Serial Channel 0 Receive Interrupt Control Register
- - 00h
CEh
Serial Channel 0 Transmit Buffer Interrupt Control Register
- - 00h
FEB0h
58h
Serial Channel 0 Transmit Buffer Register (write only)
0000h
FF6Ch
B6h
Serial Channel 0 Transmit Interrupt Control Register
- - 00h
FE12h
09h
CPU System Stack Pointer Register
FC00h
F0B4h
E
5Ah
SSC Baud Rate Register
0000h
D9h
SSC Control Register
0000h
BBh
SSC Error Interrupt Control Register
- - 00h
59h
SSC Receive Buffer (read only)
XXXXh
BAh
SSC Receive Interrupt Control Register
- - 00h
58h
SSC Transmit Buffer (write only)
0000h
FF72h
B9h
SSC Transmit Interrupt Control Register
- - 00h
STKOV
FE14h
0Ah
CPU Stack Overflow Pointer Register
FA00h
STKUN
FE16h
0Bh
CPU Stack Underflow Pointer Register
FC00h
FF12h
89h
CPU System Configuration Register
0xx0h
SSCCON
b
SSCEIC
b
SSCRB
SSCRIC
SSCTIC
SYSCON
FF76h
F0B2h
b
SSCTB
b
E
FF74h
F0B0h
b
E
FFB2h
E
1
121/160
ST10F269-T3
Table 31 : Special Function Registers Listed by Name (continued)
Physical
address
Name
T0
T01CON
b
T0IC
b
8-bit
address
Description
Reset
value
FE50h
28h
CAPCOM Timer 0 Register
0000h
FF50h
A8h
CAPCOM Timer 0 and Timer 1 Control Register
0000h
FF9Ch
CEh
CAPCOM Timer 0 Interrupt Control Register
- - 00h
T0REL
FE54h
2Ah
CAPCOM Timer 0 Reload Register
0000h
T1
FE52h
29h
CAPCOM Timer 1 Register
0000h
FF9Eh
CFh
CAPCOM Timer 1 Interrupt Control Register
- - 00h
FE56h
2Bh
CAPCOM Timer 1 Reload Register
0000h
T1IC
b
T1REL
T2
FE40h
20h
GPT1 Timer 2 Register
0000h
T2CON
b
FF40h
A0h
GPT1 Timer 2 Control Register
0000h
T2IC
b
FF60h
B0h
GPT1 Timer 2 Interrupt Control Register
- - 00h
FE42h
21h
GPT1 Timer 3 Register
0000h
T3
T3CON
b
FF42h
A1h
GPT1 Timer 3 Control Register
0000h
T3IC
b
FF62h
B1h
GPT1 Timer 3 Interrupt Control Register
- - 00h
FE44h
22h
GPT1 Timer 4 Register
0000h
T4
T4CON
b
FF44h
A2h
GPT1 Timer 4 Control Register
0000h
T4IC
b
FF64h
B2h
GPT1 Timer 4 Interrupt Control Register
- - 00h
FE46h
23h
GPT2 Timer 5 Register
0000h
T5CON
b
FF46h
A3h
GPT2 Timer 5 Control Register
0000h
T5IC
b
FF66h
B3h
GPT2 Timer 5 Interrupt Control Register
- - 00h
FE48h
24h
GPT2 Timer 6 Register
0000h
A4h
GPT2 Timer 6 Control Register
0000h
T5
T6
T6CON
b
FF48h
T6IC
b
FF68h
T7
F050h
B4h
GPT2 Timer 6 Interrupt Control Register
- - 00h
E
28h
CAPCOM Timer 7 Register
0000h
T78CON
b
FF20h
90h
CAPCOM Timer 7 and 8 Control Register
0000h
T7IC
b
F17Ah
E
BEh
CAPCOM Timer 7 Interrupt Control Register
- - 00h
T7REL
F054h
E
2Ah
CAPCOM Timer 7 Reload Register
0000h
T8
F052h
E
29h
CAPCOM Timer 8 Register
0000h
F17Ch
E
BFh
CAPCOM Timer 8 Interrupt Control Register
- - 00h
F056h
E
2Bh
CAPCOM Timer 8 Reload Register
0000h
D6h
Trap Flag Register
0000h
T8IC
b
T8REL
TFR
b
FFACh
FEAEh
57h
Watchdog Timer Register (read only)
0000h
WDTCON
b
FFAEh
D7h
Watchdog Timer Control Register
00xxh 2
XP0IC
b
F186h
E
C3h
CAN1 Module Interrupt Control Register
- - 00h 3
XP1IC
b
F18Eh
E
C7h
CAN2 Module Interrupt Control Register
- - 00h 3
XP2IC
b
F196h
E
CBh
Flash ready/busy interrupt control register
- - 00h 3
XP3IC
b
F19Eh
E
CFh
PLL unlock Interrupt Control Register
- - 00h 3
F024h
E
b
FF1Ch
WDT
XPERCON
ZEROS
12h
XPER Configuration Register
- - 05h
8Eh
Constant Value 0’s Register (read only)
0000h
Notes: 1. The system configuration is selected during reset.
2. Bit WDTR indicates a watchdog timer triggered reset.
3. The XPnIC Interrupt Control Registers control interrupt requests from integrated X-Bus peripherals. Some software controlled
interrupt requests may be generated by setting the XPnIR bits (of XPnIC register) of the unused X-peripheral nodes.
122/160
ST10F269-T3
20.1 - Identification Registers
The ST10F269-T3 has four Identification registers, mapped in ESFR space. These register contain:
– A manufacturer identifier,
– A chip identifier, with its revision,
– A internal memory and size identifier and programming voltage description.
IDMANUF (F07Eh / 3Fh) 1
15
14
13
12
ESFR
11
10
9
8
Reset Value: 0401h
7
6
5
MANUF
4
3
2
1
0
0
0
0
0
1
R
MANUF
Manufacturer Identifier - 020h: STMicroelectronics Manufacturer (JTAG worldwide
normalization).
IDCHIP (F07Ch / 3Eh) 1
15
14
13
12
ESFR
11
10
9
8
Reset Value: 10DXh
7
6
Device Identifier - 10Dh: ST10F269-T3 identifier.
IDMEM (F07Ah / 3Dh) 1
12
ESFR
11
2
R
CHIPID
13
3
R
Device Revision Identifier
14
4
REVID
REVID
15
5
CHIPID
10
9
8
7
6
MEMSIZE
R
R
5
4
3
2
MEMSIZE
Internal Memory Size is calculated using the following formula:
Size = 4 x [MEMSIZE] (in K Byte) - 040h for ST10F269-T3 (256K Byte)
MEMTYP
Internal Memory Type - 3h for ST10F269-T3 (Flash memory).
15
14
13
12
ESFR
11
10
9
8
0
Reset Value: 3040h
MEMTYP
IDPROG (F078h / 3Ch) 1
1
7
1
0
Reset Value: 0040h
6
5
4
PROGVPP
PROGVDD
R
R
3
2
1
0
PROGVDD
Programming VDD Voltage
VDD voltage when programming EPROM or FLASH devices is calculated using the
following formula: VDD = 20 x [PROGVDD] / 256 (volts) - 40h for ST10F269-T3 (5V).
PROGVPP
Programming VPP Voltage (no need of external VPP) - 00h
Note : 1. All identification words are read only registers.
123/160
ST10F269-T3
20.2 - System Configuration Registers
The ST10F269-T3 has registers used for different configuration of the overall system. These registers are
described below.
SYSCON (FF12h / 89h)
15 14 13
STKSZ
RW
12
11
SFR
10
9
8
7
Reset Value: 0xx0h
6
ROMS1 SGTDIS ROMEN BYTDIS CLKEN WRCFG CSCFG
RW
RW
RW1
RW1
RW
RW1
RW
5
4
3
PWD
CFG
OWD
DIS
BDR
STEN
RW
RW
RW
2
1
0
XPERXPEN VISIBLE
SHARE
RW
RW
RW
Notes: 1. These bit are set directly or indirectly according to PORT0 and EA pin configuration during reset sequence.
2. Register SYSCON cannot be changed after execution of the EINIT instruction.
XPER-SHARE
XBUS Peripheral Share Mode Control
‘0’: External accesses to XBUS peripherals are disabled
‘1’: XBUS peripherals are accessible via the external bus during hold mode
VISIBLE
Visible Mode Control
‘0’: Accesses to XBUS peripherals are done internally
‘1’: XBUS peripheral accesses are made visible on the external pins
XPEN
XBUS Peripheral Enable bit
‘0’: Accesses to the on-chip X-Peripherals and XRAM are disabled
‘1’: The on-chip X-Peripherals are enabled.
BDRSTEN
Bidirectional Reset Enable
‘0’: RSTIN pin is an input pin only. (SW Reset or WDT Reset have no effect on this pin)
‘1’: RSTIN pin is a bidirectional pin. This pin is pulled low during 1024 TCL during reset sequence.
OWDDIS
Oscillator Watchdog Disable Control
‘0’: Oscillator Watchdog (OWD) is enabled. If PLL is bypassed, the OWD monitors XTAL1 activity.
If there is no activity on XTAL1 for at least 1 µs, the CPU clock is switched automatically to PLL’s
base frequency (from 2 to 10MHz).
‘1’: OWD is disabled. If the PLL is bypassed, the CPU clock is always driven by XTAL1 signal. The
PLL is turned off to reduce power supply current.
PWDCFG
Power Down Mode Configuration Control
‘0’: Power Down Mode can only be entered during PWRDN instruction execution if NMI pin is low,
otherwise the instruction has no effect. Exit power down only with reset.
‘1’: Power Down Mode can only be entered during PWRDN instruction execution if all enabled fast
external interrupt EXxIN pins are in their inactive level. Exiting this mode can be done by asserting
one enabled EXxIN pin or with external reset.
CSCFG
Chip Select Configuration Control
‘0’: Latched Chip Select lines: CSx change 1 TCL after rising edge of ALE
‘1’: Unlatched Chip Select lines: CSx change with rising edge of ALE.
124/160
ST10F269-T3
WRCFG
Write Configuration Control (Inverted copy of bit WRC of RP0H)
‘0’: Pins WR and BHE retain their normal function
‘1’: Pin WR acts as WRL, pin BHE acts as WRH.
CLKEN
System Clock Output Enable (CLKOUT)
‘0’: CLKOUT disabled: pin may be used for general purpose I/O
‘1’: CLKOUT enabled: pin outputs the system clock signal.
Disable/Enable Control for Pin BHE (Set according to data bus width)
BYTDIS
‘0’: Pin BHE enabled
‘1’: Pin BHE disabled, pin may be used for general purpose I/O.
Internal Memory Enable (Set according to pin EA during reset)
ROMEN
‘0’: Internal Memory disabled: accesses to the Memory area use the external bus
‘1’: Internal Memory enabled.
SGTDIS
Segmentation Disable/Enable Control
‘0’: Segmentation enabled (CSP is saved/restored during interrupt entry/exit)
‘1’: Segmentation disabled (Only IP is saved/restored).
ROMS1
Internal Memory Mapping
‘0’: Internal Memory area mapped to segment 0 (00’0000H...00’7FFFH)
‘1’: Internal Memory area mapped to segment 1 (01’0000H...01’7FFFH).
STKSZ
System Stack Size
Selects the size of the system stack (in the internal RAM) from 32 to 1024 words.
BUSCON0 (FF0Ch / 86h)
15
CSWEN0
RW
14
13
SFR
12
CSREN0 RDYPOL0 RDYEN0
RW
RW
11
-
10
BUSCON1 (FF14h / 8Ah)
15
CSWEN1
RW
14
13
RW
12
15
RW
14
13
RW
15
RW
14
13
RW
RW1
5
12
RW
9
8
7
ALECTL1
-
BTYP
6
RW
2
1
0
MCTC
RW
RW
RW
RW
RW
5
4
3
MTTC1 RWDC1
RW
2
1
0
MCTC
RW
RW
Reset Value: 0000h
11
10
9
8
7
-
BUSACT2
ALECTL2
-
BTYP
6
RW
RW
RW
5
4
3
MTTC2 RWDC2
RW
SFR
12
3
Reset Value: 0000h
10
RW
4
MTTC0 RWDC0
SFR
CSREN3 RDYPOL3 RDYEN3
RW
RW2
6
BUSACT1
BUSCON3 (FF18h / 8Ch)
CSWEN3
BTYP
-
RW
CSREN2 RDYPOL2 RDYEN2
RW
7
-
11
BUSCON2 (FF16h / 8Bh)
CSWEN2
8
SFR
CSREN1 RDYPOL1 RDYEN1
RW
9
BUS ACT0 ALE CTL0
RW2
RW
Reset Value: 0xx0h
2
1
0
MCTC
RW
RW
Reset Value: 0000h
11
10
9
8
7
-
BUSACT3
ALECTL3
-
BTYP
6
RW
RW
RW
5
4
MTTC3 RWDC3
RW
RW
3
2
1
0
MCTC
RW
125/160
ST10F269-T3
BUSCON4 (FF1Ah / 8Dh)
15
CSWEN4
RW
14
13
SFR
12
CSREN4 RDYPOL4 RDYEN4
RW
RW
Reset Value: 0000h
11
10
9
8
7
-
BUSACT4
ALECTL4
-
BTYP
RW
RW
RW
6
5
4
MTTC4 RWDC4
RW
RW
3
2
1
0
MCTC
RW
RW
Notes: 1. BTYP (bit 6 and 7) are set according to the configuration of the bit l6 and l7 of PORT0 latched at the end of the reset sequence.
2. BUSCON0 is initialized with 0000h, if EA pin is high during reset. If EA pin is low during reset, bit BUSACT0 and ALECTRL0 are
set (’1’) and bit field BTYP is loaded with the bus configuration selected via PORT0.
MCTC
Memory Cycle Time Control (Number of memory cycle time wait states)
0 0 0 0: 15 wait states (Nber = 15 - [MCTC])
...
1 1 1 1: No wait state
RWDCx
Read/Write Delay Control for BUSCONx
‘0’: With read/write delay: activate command 1 TCL after falling edge of ALE
‘1’: No read/write delay: activate command with falling edge of ALE
MTTCx
Memory Tristate Time Control
‘0’: 1 wait state
‘1’: No wait state
BTYP
External Bus Configuration
0 0: 8-bit Demultiplexed Bus
0 1: 8-bit Multiplexed Bus
1 0: 16-bit Demultiplexed Bus
1 1: 16-bit Multiplexed Bus
Note: For BUSCON0, BTYP bit-field is defined via PORT0 during reset.
ALECTLx
ALE Lengthening Control
‘0’: Normal ALE signal
‘1’: Lengthened ALE signal
BUSACTx
Bus Active Control
‘0’: External bus disabled
‘1’: External bus enabled (within the respective address window, see
ADDRSEL)
RDYENx
READY Input Enable
‘0’: External bus cycle is controlled by bit field MCTC only
‘1’: External bus cycle is controlled by the READY input signal
RDYPOLx
Ready Active Level Control
‘0’: Active level on the READY pin is low, bus cycle terminates with a ‘0’ on
READY pin,
‘1’: Active level on the READY pin is high, bus cycle terminates with a ‘1’ on
READY pin.
CSRENx
Read Chip Select Enable
‘0’: The CS signal is independent of the read command (RD)
‘1’: The CS signal is generated for the duration of the read command
CSWENx
Write Chip Select Enable
‘0’: The CS signal is independent of the write command (WR,WRL,WRH)
‘1’: The CS signal is generated for the duration of the write command
126/160
ST10F269-T3
RP0H (F108h / 84h)
ESFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
Reset Value: --XXH
6
5
4
3
2
1
0
CLKSEL
SALSEL
CSSEL
WRC
R1-2
R2
R2
R2
Write Configuration Control
WRC 2
‘0’: Pin WR acts as WRL, pin BHE acts as WRH
‘1’: Pins WR and BHE retain their normal function
CSSEL 2
Chip Select Line Selection (Number of active CS outputs)
0 0: 3 CS lines: CS2...CS0
0 1: 2 CS lines: CS1...CS0
1 0: No CS line at all
1 1: 5 CS lines: CS4...CS0 (Default without pull-downs)
SALSEL 2
Segment Address Line Selection (Number of active segment address outputs)
0 0: 4-bit segment address: A19...A16
0 1: No segment address lines at all
1 0: 8-bit segment address: A23...A16
1 1: 2-bit segment address: A17...A16 (Default without pull-downs)
CLKSEL 1 - 2
System Clock Selection
000: fCPU = 2.5 x fOSC
001: fCPU = 0.5 x fOSC
010: fCPU = 1.5 x fOSC
011: fCPU = fOSC
100: fCPU = 5 x fOSC
101: fCPU = 2 x fOSC
110: fCPU = 3 x fOSC
111: fCPU = 4 x fOSC
Notes:
1. RP0H.7 to RP0H.5 bits are loaded only during a long hardware reset. As pull-up resistors are active on each Port P0H pins
during reset, RP0H default value is "FFh".
2. These bits are set according to Port 0 configuration during any reset sequence.
3. RP0H is a read only register.
127/160
ST10F269-T3
EXICON (F1C0h / E0h
15
14
13
12
ESFR
11
10
9
8
Reset Value: 0000h
7
6
5
4
3
2
1
0
EXI7ES
EXI6ES
EXI5ES
EXI4ES
EXI3ES
EXI2ES
EXI1ES
EXI0ES
RW
RW
RW
RW
RW
RW
RW
RW
EXIxES(x=7...0)
External Interrupt x Edge Selection Field (x=7...0)
0 0:
Fast external interrupts disabled: standard mode
EXxIN pin not taken in account for entering/exiting Power Down mode.
0 1:
Interrupt on positive edge (rising)
Enter Power Down mode if EXiIN = ‘0’, exit if EXxIN = ‘1’ (referred as ‘high’ active level)
1 0:
Interrupt on negative edge (falling)
Enter Power Down mode if EXiIN = ‘1’, exit if EXxIN = ‘0’ (referred as ‘low’ active level)
1 1:
Interrupt on any edge (rising or falling)
Always enter Power Down mode, exit if EXxIN level changed.
EXISEL (F1DAh / EDh)
15
14
13
12
ESFR
11
10
9
8
Reset Value: 0000h
7
6
5
4
3
2
1
0
EXI7SS
EXI6SS
EXI5SS
EXI4SS
EXI3SS
EXI2SS
EXI1SS
EXI0SS
RW
RW
RW
RW
RW
RW
RW
RW
EXIxSS
External Interrupt x Source Selection (x=7...0)
‘00’:
Input from associated Port 2 pin.
‘01’:
Input from “alternate source”.
‘10’:
Input from Port 2 pin ORed with “alternate source”.
‘11’:
Input from Port 2 pin ANDed with “alternate source”.
EXIxSS
Port 2 pin
Alternate Source
0
P2.8
CAN1_RxD
1
P2.9
CAN2_RxD
2
P2.10
RTCSI
3
P2.11
RTCAI
4...7
P2.12...15
Not used (zero)
XP3IC (F19Eh / CFh) 1
ESFR
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
6
XP3IR XP3IE
RW
Note: 1. XP3IC register has the same bit field as xxIC interrupt registers
128/160
Reset Value: --00h
RW
5
4
3
2
1
0
XP3ILVL
GLVL
RW
RW
ST10F269-T3
xxIC (yyyyh / zzh)
SFR Area
Reset Value: --00h
15
14
13
12
11
10
9
8
7
6
-
-
-
-
-
-
-
-
xxIR
xxIE
ILVL
GLVL
RW
RW
RW
RW
Bit
5
4
3
2
1
0
Function
GLVL
Group Level
Defines the internal order for simultaneous requests of the same priority.
3: Highest group priority
0: Lowest group priority
ILVL
Interrupt Priority Level
Defines the priority level for the arbitration of requests.
Fh: Highest priority level
0h: Lowest priority level
xxIE
Interrupt Enable Control Bit (individually enables/disables a specific source)
‘0’: Interrupt Request is disabled
‘1’: Interrupt Request is enabled
xxIR
Interrupt Request Flag
‘0’: No request pending
‘1’: This source has raised an interrupt request
XPERCON (F024h / 12h)
ESFR
Reset Value: --05h
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
-
-
-
RTCEN
XRAM2EN
XRAM1EN
CAN2EN
CAN1EN
RW
RW
RW
RW
RW
CAN1EN
CAN1 Enable Bit
‘0’: Accesses to the on-chip CAN1 XPeripheral and its functions are disabled. P4.5 and P4.6 pins can be
used as general purpose I/Os. Address range 00’EF00h-00’EFFFh is only directed to external memory if
CAN2EN is also ‘0’.
‘1’: The on-chip CAN1 XPeripheral is enabled and can be accessed.
CAN2EN
CAN2 Enable Bit
‘0’: Accesses to the on-chip CAN2 XPeripheral and its functions are disabled. P4.4 and P4.7 pins can be
used as general purpose I/Os. Address range 00’EE00h-00’EEFFh is only directed to external memory if
CAN1EN is also ‘0’.
‘1’: The on-chip CAN2 XPeripheral is enabled and can be accessed.
XRAM1EN
XRAM1 Enable Bit
‘0’: Accesses to external memory within space 00’E000h to 00’E7FFh. The 2K Bytes of internal XRAM1
are disabled.
’1’: Accesses to the internal 2K Bytes of XRAM1.
XRAM2EN
XRAM2 Enable Bit
‘0’: Accesses to the external memory within space 00’C000h to 00’DFFFh. The 8K Bytes of internal
XRAM2 are disabled.
’1’: Accesses to the internal 8K Bytes of XRAM2.
RTCEN
RTC Enable Bit
’0’: Accesses to the on-chip Real Time Clock are disabled, external access performed. Address range
00’EC00h-00’ECFFh is only directed to external memory if CAN1EN and CAN2EN are ’0’ also
’1’: The on-chip Real Time Clock is enabled and can be accessed.
129/160
ST10F269-T3
When both CAN are disabled via XPERCON
setting, then any access in the address range
00’EE00h - 00’EFFFh will be directed to external
memory interface, using the BUSCONx register
corresponding to address matching ADDRSELx
register. P4.4 and P4.7 can be used as General
Purpose I/O when CAN2 is not enabled, and P4.5
and P4.6 can be used as General Purpose I/O
when CAN1 is not enabled.
The default XPER selection after Reset is
identical to XBUS configuration of ST10C167:
XCAN1 is enabled, XCAN2 is disabled, XRAM1
(2K Byte compatible XRAM) is enabled, XRAM2
(new 8K Byte XRAM) is disabled.
130/160
Register XPERCON cannot be changed after the
global enabling of XPeripherals, i.e. after setting of
bit XPEN in SYSCON register.
In EMUlation mode, all the XPERipherals are
enabled (XPERCON bit are all set).
When the Real Time Clock is disabled (RTCEN =
0), the clock oscillator is switch off if ST10 enters
in power-down mode. Otherwise, when the Real
Time Clock is enabled, the bit RTCOFF of the
RTCCON register allows to choose the
power-down mode of the clock oscillator.
ST10F269-T3
21 - ELECTRICAL CHARACTERISTICS
21.1 - Absolute Maximum Ratings
Symbol
Parameter
Value
Unit
-0.5, +6.5
V
VDD
Voltage on VDD pins with respect to ground1
VIO
Voltage on any pin with respect to ground1
-0.5, (VDD +0.5)
V
Voltage on VAREF pin with respect to ground1
-0.3, (VDD +0.3)
V
-10, +10
mA
VAREF
IOV
Input Current on any pin during overload condition1
ITOV
Absolute Sum of all input currents during overload condition1
|100|
mA
Ptot
Power Dissipation1
0.75
W
TA
Ambient Temperature under bias
-40, +125
°C
Storage Temperature1
-65, +150
°C
Tstg
Note: 1. 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 these or any other conditions above those indicated in the operational sections
of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
During overload conditions (VIN > VDD or VIN < VSS) the voltage on pins with respect to ground (VSS) must not exceed the values
defined by the Absolute Maximum Ratings.
21.2 - Parameter Interpretation
The parameters listed in the following tables represent the characteristics of the ST10F269-T3 and its
demands on the system. Where the ST10F269-T3 logic provides signals with their respective timing
characteristics, the symbol “CC” for Controller Characteristics, is included in the “Symbol” column.
Where the external system must provide signals with their respective timing characteristics to the
ST10F269-T3, the symbol “SR” for System Requirement, is included in the “Symbol” column.
21.3 - DC Characteristics
VDD = 5V ± 10%, VSS = 0V, fCPU = 32MHz, Reset active, TA = -40 to + 125°C
Symbol
Parameter
Test
Conditions
Min.
Max.
Unit
VIL
SR Input low voltage
–
-0.5
0.2 VDD -0.1
V
VILS
SR Input low voltage (special threshold)
–
-0.5
2.0
V
VIH
SR
Input high voltage
(all except RSTIN and XTAL1)
–
0.2 VDD +
0.9
VDD + 0.5
V
VIH1
SR Input high voltage RSTIN
–
0.6 VDD
VDD + 0.5
V
VIH2
SR Input high voltage XTAL1
–
0.7 VDD
VDD + 0.5
V
VIHS
SR Input high voltage (special threshold)
–
0.8 VDD
-0.2
VDD + 0.5
V
3
–
250
–
mV
HYS
Input Hysteresis (special threshold)
VOL
CC Output low voltage (PORT0, PORT1, Port 4,
ALE, RD, WR, BHE, CLKOUT, RSTOUT)
1
IOL = 2.4mA
–
0.45
V
VOL1
CC Output low voltage (all other outputs)
1
IOL1 = 1.6mA
–
0.45
V
131/160
ST10F269-T3
Test
Conditions
Min.
Max.
Unit
IOH = -500µA
IOH = -2.4mA
0.9 VDD
2.4
–
–
V
IOH = – 250µA
IOH = – 1.6mA
0.9 VDD
2.4
–
–
V
V
 IOZ1  CC Input leakage current (Port 5)
0V < VIN < VDD
–
200
nA
 IOZ2  CC Input leakage current (all other)
0V < VIN < VDD
–
1
µA
–
5
mA
Symbol
Parameter
VOH
Output high voltage (PORT0, PORT1, Port4, 1
CC ALE, RD, WR, BHE, CLKOUT, RSTOUT)
VOH1
CC Output high voltage (all other outputs)
1/2
 IOV 
SR Overload current
RRST
CC RSTIN pull-up resistor
3/4
3
–
50
250
kΩ
IRWH
Read / Write inactive current
5/6
VOUT = 2.4V
–
-40
µA
IRWL
Read / Write active current
5/7
VOUT = VOLmax
-500
–
µA
IALEL
ALE inactive current
5/6
VOUT = VOLmax
40
–
µA
IALEH
ALE active current
5/7
VOUT = 2.4V
–
500
µA
IP6H
Port 6 inactive current
5/6
VOUT = 2.4V
–
-40
µA
IP6L
Port 6 active current
5/7
VOUT = VOL1max
-500
–
µA
5/6
VIN = VIHmin
–
-10
µA
5/7
VIN = VILmax
-100
–
µA
0V < VIN < VDD
–
20
µA
5
-
mA/V
f = 1MHz,
TA = 25°C
–
10
pF
RSTIN = VIH1
fCPU in [MHz]
–
20 + 2.3 x fCPU
mA
RSTIN = VIH1
fCPU in [MHz]
–
20 + fCPU
mA
VDD = 5.5V
TA = 25°C
–
15 12
µA
–
50
14
µA
_
220 12
µA
–
2 + fOSC / 4
mA
IP0H
PORT0 configuration current
IP0L
 IIL 
gm
CIO
CC XTAL1 input current
On-chip oscillator trans conductance
CC Pin capacitance (digital inputs / outputs)
3
3/5
8/9
ICC
Power supply current
IID
Idle mode supply current
10
11
IPD
Power-down mode supply current
TA = 85°C
TA = 125°C
11
IPD2
Power-down mode supply current (Real time
clock enabled, oscillator enabled)
13
VDD = 5.5V
TA = 55°C
fOSC = 25MHz
Notes: 1. ST10F269-T3 pins are equipped with low-noise output drivers which significantly improve the device’s EMI performance. These
low-noise drivers deliver their maximum current only until the respective target output level is reached. After this, the output current
is reduced. This results in increased impedance of the driver, which attenuates electrical noise from the connected PCB tracks. The
current specified in column “Test Conditions” is delivered in any cases.
132/160
ST10F269-T3
2. This specification is not valid for outputs which are switched to open drain mode. In this case the respective output will float and the
voltage results from the external circuitry.
3. Partially tested, guaranteed by design characterization.
4. Overload conditions occur if the standard operating conditions are exceeded, i.e. the voltage on any pin exceeds the specified
range (i.e. VOV > VDD+0.5V or VOV < -0.5V). The absolute sum of input overload currents on all port pins may not exceed 50mA. The
supply voltage must remain within the specified limits.
5. This specification is only valid during Reset, or during Hold-mode or Adapt-mode. Port 6 pins are only affected if they are used for
CS output and if their open drain function is not enabled.
6. The maximum current may be drawn while the respective signal line remains inactive.
7. The minimum current must be drawn in order to drive the respective signal line active.
8. The power supply current is a function of the operating frequency. This dependency is illustrated in the Figure 64. These
parameters are tested at VDDmax and 32MHz CPU clock with all outputs disconnected and all inputs at VIL or VIH. The chip is
configured with a demultiplexed 16-bit bus, direct clock drive, 5 chip select lines and 2 segment address lines, EA pin is low during
reset. After reset, PORT 0 is driven with the value ‘00CCh’ that produces infinite execution of NOP instruction with 15 wait-states, R/
W delay, memory tristate wait state, normal ALE. Peripherals are not activated.
9. The total operating currents (sink & source) on the I/Os configured as output must not exceed |100|mA.
10. Idle mode supply current is a function of the operating frequency. This dependency is illustrated in the Figure 64. These
parameters are tested at VDDmax and 32MHz CPU clock with all outputs disconnected and all inputs at VIL or VIH.
11. This parameter value includes leakage currents. With all inputs (including pins configured as inputs) at 0V to 0.1V or at
VDD – 0.1V to VDD, VREF = 0V, all outputs (including pins configured as outputs) disconnected.
12. Typical IPD value is 5µA @ TA=25°C, 20µA @ TA=85°C and 60µA @ TA=125°C.
13. Partially tested, guaranteed by design characterization using 22pF loading capacitors on crystal pins
14. Guaranteed by design characterization..
Figure 64 : Supply / Idle Current as a Function of Operating Frequency
I [mA]
ICCmax
100
93.6mA
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0052mA
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 I
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 I
000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
ICCtyp
50
IDmax
IDtyp
0
0
10
20
30
fCPU [MHz]
133/160
ST10F269-T3
21.3.1 - A/D Converter Characteristics
VDD = 5V ± 10%, VSS = 0V, TA = -40 to +125°C, 4.0V ≤ VAREF ≤ VDD + 0.1V; VSS0.1V ≤ VAGND ≤ VSS + 0.2V
Table 32 : A/D Converter Characteristics
Limit Values
Symbol
Parameter
Test Condition
Unit
minimum
VAREF
VAIN
SR
SR
IAREF
CC
CC
CAIN
CC
tS
tC
CC
DNL
CC
Analog Reference voltage
VDD + 0.1
V
VAGND
VAREF
V
–
–
500
1
µA
µA
–
–
10
15
pF
pF
Analog input voltage
Reference supply current
running mode
power-down mode
7
ADC input capacitance
Not sampling
Sampling
7
Sample time
2-4
48 TCL
1 536 TCL
Conversion time
3-4
388 TCL
2 884 TCL
Differential Nonlinearity
5
-0.5
+0.5
LSB
-1.5
+1.5
LSB
-1.0
+1.0
LSB
-2.0
+2.0
LSB
–
(tS / 150) - 0.25
–
1/500
INL
CC
Integral Nonlinearity
OFS
CC
Offset Error
5
Total unadjusted error
5
CC
4.0
1-8
5
TUE
maximum
RASRC
SR
Internal resistance of analog source
K
CC
Coupling Factor between inputs
tS in
6-7
[ns]
2-7
kΩ
Notes: 1. VAIN may exceed VAGND or VAREF up to the absolute maximum ratings. However, the conversion result in these cases will be
X000h or X3FFh, respectively.
2. During the tS sample time the input capacitance Cain can be charged/discharged by the external source. The internal resistance of
the analog source must allow the capacitance to reach its final voltage level within the tS sample time. After the end of the tS sample
time, changes of the analog input voltage have no effect on the conversion result. Values for the tSC sample clock depend on the
programming. Referring to the tC conversion time formula of Section 21.3.2 - on page 135 and to Table 33 on page 135:
- tS min = 2 tSC min = 2 tCC min = 2 x 24 x TCL = 48 TCL
- tS max = 2 tSC max = 2 x 8 tCC max = 2 x 8 x 96 TCL = 1536 TCL
TCL is defined in Section 21.4.2 -, Section 21.4.4 -, and Section 21.4.5 - on page 138:
3. The conversion time formula is:
- tC = 14 tCC + tS + 4 TCL (= 14 tCC + 2 tSC + 4 TCL)
The tC parameter includes the tS sample time, the time for determining the digital result and the time to load the result register with
the result of the conversion. Values for the tCC conversion clock depend on the programming. Referring to Table 33 on page 135:
- tC min = 14 tCC min + tS min + 4 TCL = 14 x 24 x TCL + 48 TCL + 4 TCL = 388 TCL
- tC max = 14 tCC max + tS max + 4 TCL = 14 x 96 TCL + 1536 TCL + 4 TCL = 2884 TCL
4. This parameter is fixed by ADC control logic.
5. DNL, INL, TUE are tested at VAREF = 5.0V, VAGND = 0V, VCC = 4.9V. It is guaranteed by design characterization for all other
voltages within the defined voltage range.
‘LSB’ has a value of VAREF / 1024.
The specified TUE is guaranteed only if an overload condition (see IOV specification) occurs on maximum 2 not selected analog input
pins and the absolute sum of input overload currents on all analog input pins does not exceed 10mA.
6. The coupling factor is measured on a channel while an overload condition occurs on the adjacent not selected channel with an
absolute overload current less than 10mA.
7. Partially tested, guaranteed by design characterization.
8.To remove noise and undesirable high frequency components from the analog input signal, a low-pass filter must be connected at
the ADC input. The cut-off frequency of this filter should avoid 2 opposite transitions during the ts sampling time of the ST10 ADC:
- fcut-off ≤ 1 / 5 ts to 1/10 ts
where ts is the sampling time of the ST10 ADC and is not related to the Nyquist frequency determined by the tc conversion time.
134/160
ST10F269-T3
21.3.2 - Conversion Timing Control
When a conversion is started, first the
capacitances of the converter are loaded via the
respective analog input pin to the current analog
input voltage. The time to load the capacitances is
referred to as the sample time ts. Next the
sampled voltage is converted to a digital value in
10 successive steps, which correspond to the
10-bit resolution of the ADC. The next 4 steps are
used for equalizing internal levels (and are kept
for exact timing matching with the 10-bit A/D
converter module implemented in the ST10F168).
The current that has to be drawn from the sources
for sampling and changing charges depends on
the time that each respective step takes, because
the capacitors must reach their final voltage level
within the given time, at least with a certain
approximation. The maximum current, however,
that a source can deliver, depends on its internal
resistance.
The sample time tS (= 2 tSC) and the conversion
time tc (= 14 tCC + 2 tSC + 4 TCL) can be
programmed relatively to the ST10F269-T3 CPU
clock. This allows adjusting the A/D converter of
the ST10F269-T3 to the properties of the system:
Fast Conversion can be achieved by
programming the respective times to their
absolute possible minimum. This is preferable for
scanning high frequency signals. The internal
resistance of analog source and analog supply
must be sufficiently low, however.
High Internal Resistance can be achieved by
programming the respective times to a higher
value, or the possible maximum. This is preferable
when using analog sources and supply with a high
internal resistance in order to keep the current as
low as possible. However the conversion rate in
this case may be considerably lower.
The conversion times are programmed via the
upper four bit of register ADCON. Bit field ADCTC
(conversion time control) selects the basic
conversion clock tCC, used for the 14 steps of
converting. The sample time tS is a multiple of this
conversion time and is selected by bit field
ADSTC (sample time control). The table below
lists the possible combinations. The timings refer
to the unit TCL, where fCPU = 1/2TCL.
Table 33 : ADC Sampling and Conversion Timing
Conversion Clock tCC
ADCON.15/14
ADCTC
Sample Clock tSC
TCL = 1/2 x fXTAL
At fCPU = 32MHz
ADCON.13/12
ADSTC
tSC =
At fCPU = 32MHz
and ADCTC = 00
00
TCL x 24
0.375µs
00
tCC
0.375µs
01
Reserved, do not use
Reserved
01
tCC x 2
0.75µs
10
TCL x 96
1.5 µs
10
tCC x 4
1.50µs
11
TCL x 48
0.75 µs
11
tCC x 8
3.00µs
A complete conversion will take 14 tCC + 2 tSC + 4 TCL (fastest conversion rate = 6.06µs at 32MHz). This
time includes the conversion itself, the sample time and the time required to transfer the digital value to
the result register.
135/160
ST10F269-T3
21.4 - AC characteristics
21.4.1 - Test Waveforms
Figure 65 : Input / Output Waveforms
2.4V
0.2VDD+0.9
0.2VDD+0.9
Test Points
0.2VDD-0.1
0.45V
0.2VDD-0.1
AC inputs during testing are driven at 2.4V for a logic ‘1’ and 0.4V for a logic ‘0’.
Timing measurements are made at V IH min for a logic ‘1’ and VIL max for a logic ‘0’.
Figure 66 : Float Waveforms
VOH
VLoad +0.1V
VLoad
VLoad -0.1V
VOH -0.1V
Timing
Reference
Points
VOL +0.1V
VOL
For timing purposes a port pin is no longer floating when VLOAD changes of ±100mV.
It begins to float when a 100mV change from the loaded VOH/VOL level occurs (I OH/IOL = 20mA).
21.4.2 - Definition of Internal Timing
The internal operation of the ST10F269-T3 is
controlled by the internal CPU clock fCPU. Both
edges of the CPU clock can trigger internal (for
example pipeline) or external (for example bus
cycles) operations.
The specification of the external timing (AC
Characteristics) therefore depends on the time
between two consecutive edges of the CPU clock,
called “TCL”.
136/160
The CPU clock signal can be generated by
different mechanisms. The duration of TCL and its
variation (and also the derived external timing)
depends on the mechanism used to generate
fCPU.
This influence must be regarded when calculating
the timings for the ST10F269-T3.
The example for PLL operation shown in Figure
67 refers to a PLL factor of 4.
ST10F269-T3
The mechanism used to generate the CPU clock is selected during reset by the logic levels on pins
P0.15-13 (P0H.7-5).
Figure 67 : Generation Mechanisms for the CPU Clock
Phase locked loop operation
fXTAL
00 00 00
fCPU
TCL TCL
Direct Clock Drive
fXTAL
00 00 00
fCPU
TCL TCL
Prescaler Operation
fXTAL
0
fCPU
TCL
0
TCL
0
21.4.3 - Clock Generation Modes
The Table 34 associates the combinations of these three bits with the respective clock generation mode.
Table 34 : CPU Frequency Generation
P0H.7 P0H.6 P0H.5 CPU Frequency fCPU = fXTAL x F External Clock Input Range1
1
1
1
fXTAL x 4
2.5 to 8MHz
1
1
0
fXTAL x 3
3.33 to 10.67MHz
1
0
1
fXTAL x 2
5 to 16MHz
1
0
0
fXTAL x 5
2 to 6.4MHz
0
1
1
fXTAL x 1
1 to 32MHz
0
1
0
fXTAL x 1.5
6.67 to 21.33MHz
0
0
1
fXTAL x 0.5
2 to 64MHz
0
0
0
fXTAL x 2.5
4 to 12.8MHz
Notes
Default configuration
Direct drive2
CPU clock via prescaler3
Notes: 1. The external clock input range refers to a CPU clock range of 1...32MHz.
2. The maximum input frequency depends on the duty cycle of the external clock signal.
3. The maximum input frequency is 32MHz when using an external crystal with the internal oscillator; providing that internal serial
resistance of the crystal is less than 40Ω. However, higher frequencies can be applied with an external clock source on pin XTAL1,
but in this case, the input clock signal must reach the defined levels VIL and VIH2..
137/160
ST10F269-T3
21.4.4 - Prescaler Operation
21.4.6 - Oscillator Watchdog (OWD)
When pins P0.15-13 (P0H.7-5) equal ’001’ during
reset, the CPU clock is derived from the internal
oscillator (input clock signal) by a 2:1 prescaler.
The frequency of fCPU is half the frequency of
fXTAL and the high and low time of fCPU (i.e. the
duration of an individual TCL) is defined by the
period of the input clock fXTAL.
An on-chip watchdog oscillator is implemented in
the ST10F269-T3. This feature is used for safety
operation with external crystal oscillator (using
direct drive mode with or without prescaler). This
watchdog oscillator operates as following:
The timings listed in the AC Characteristics that
refer to TCL therefore can be calculated using the
period of fXTAL for any TCL.
Note that if the bit OWDDIS in SYSCON register
is cleared, the PLL runs on its free-running
frequency and delivers the clock signal for the
Oscillator Watchdog. If bit OWDDIS is set, then
the PLL is switched off.
21.4.5 - Direct Drive
When pins P0.15-13 (P0H.7-5) equal ’011’ during
reset the on-chip phase locked loop is disabled
and the CPU clock is directly driven from the
internal oscillator with the input clock signal.
The frequency of fCPU directly follows the
frequency of fXTAL so the high and low time of fCPU
(i.e. the duration of an individual TCL) is defined
by the duty cycle of the input clock fXTAL.
Therefore, the timings given in this chapter refer to
the minimum TCL. This minimum value can be
calculated by the following formula:
TCL
min
= 1⁄f
XT A Ll
xl DCmin
DC = duty cycle
For two consecutive TCLs, the deviation caused
by the duty cycle of fXTAL is compensated, so the
duration of 2TCL is always 1/fXTAL.
The minimum value TCLmin has to be used only
once for timings that require an odd number of
TCLs (1,3,...). Timings that require an even
number of TCLs (2,4,...) may use the formula:
2TCL = 1 ⁄ f XTAL
Note:
138/160
The address float timings in Multiplexed
bus mode (t11 and t45) use the maximum
duration of TCL (TCLmax = 1/fXTAL x
DCmax) instead of TCLmin.
If the bit OWDDIS in SYSCON register is
cleared, the PLL runs on its free-running
frequency and delivers the clock signal for
the Oscillator Watchdog. If bit OWDDIS is
set, then the PLL is switched off.
The reset default configuration enables the
watchdog oscillator. It can be disabled by setting
the OWDDIS (bit 4) of SYSCON register.
When the OWD is enabled, the PLL runs at its
free-running frequency, and it increments the
watchdog counter. The PLL free-running
frequency is between 2 and 10MHz. On each
transition of external clock, the watchdog counter
is cleared. If an external clock failure occurs, then
the watchdog counter overflows (after 16 PLL
clock cycles).
The CPU clock signal will be switched to the PLL
free-running clock signal, and the oscillator
watchdog Interrupt Request (XP3INT) is flagged.
The CPU clock will not switch back to the external
clock even if a valid external clock exits on XTAL1
pin. Only a hardware reset can switch the CPU
clock source back to direct clock input.
When the OWD is disabled, the CPU clock is
always external oscillator clock and the PLL is
switched off to decrease consumption supply
current.
21.4.7 - Phase Locked Loop
For all other combinations of pins P0.15-13
(P0H.7-5) during reset the on-chip phase locked
loop is enabled and it provides the CPU clock (see
Table 34). The PLL multiplies the input frequency
by the factor F which is selected via the
combination of pins P0.15-13 (fCPU = fXTAL x F).
With every F’th transition of fXTAL the PLL circuit
synchronizes the CPU clock to the input clock.
This synchronization is done smoothly, so the
CPU clock frequency does not change abruptly.
Due to this adaptation to the input clock the
frequency of fCPU is constantly adjusted so it is
locked to fXTAL. The slight variation causes a jitter
of fCPU which also effects the duration of
individual TCLs.
The timings listed in the AC Characteristics that
refer to TCLs therefore must be calculated using
the minimum TCL that is possible under the
respective circumstances.
ST10F269-T3
The real minimum value for TCL depends on the
jitter of the PLL. The PLL tunes fCPU to keep it
locked on fXTAL. The relative deviation of TCL is
the maximum when it is referred to one TCL
period. It decreases according to the formula and
to the Figure 68 given below. For N periods of TCL
the minimum value is computed using the
corresponding deviation DN:
TCL
MIN
= TCL

DN 
×  1 – -------------
NOM 
100 


D = ± ( 4 – N ⁄ 15 ) [ % ]
N
where N = number of consecutive TCL periods
and 1 ≤ N ≤ 40. So for a period of 3 TCL periods
(N = 3):
D3
= 4 - 3/15 = 3.8%
3TCLmin
= 3TCLNOM x (1 - 3.8/100)
= 3TCLNOM x 0.962
3TCLmin
= 45.1ns (at fCPU = 32MHz)
This is especially important for bus cycles using wait
states and e.g. for the operation of timers, serial
interfaces, etc. For all slower operations and longer
periods (e.g. pulse train generation or measurement,
lower Baud rates, etc.) the deviation caused by the
PLL jitter is negligible.
Figure 68 : Approximated Maximum PLL Jitter
Max.jitter [%]
This approximated formula is valid for
1 ≤ N ≤ 40 and 10MHz ≤ fCPU ≤ 32MHz.
±4
±3
±2
±1
2
8
4
16
32
N
21.4.8 - External Clock Drive XTAL1
VDD = 5V ± 10%, VSS = 0V, TA = -40 to +125 °C
fCPU = fXTAL
Parameter
fCPU = fXTAL / 2
Symbol
Minimum
Maximum
Minimum
Maximum
fCPU = fXTAL x F
F = 1.5/2,/2.5/3/4/5
Unit
Minimum Maximum
Oscillator period
tOSC
SR
31.251
–
15.625
–
31.25 x N
–
ns
High time
t1
SR
12.52
–
6.252
–
12.52
–
ns
Low time
t2
SR
12.52
–
6.252
–
12.52
–
ns
Rise time
t3
SR
–
3.1252
–
1.562
–
3.1252
ns
Fall time
t4
SR
–
3.1252
–
1.562
–
3.1252
ns
Notes: 1. Theoretical minimum. The real minimum value depends on the duty cycle of the input clock signal. 32MHz is the maximum input
frequency when using an external crystal oscillator. However, 32MHz can be applied with an external clock source.
2. The input clock signal must reach the defined levels VIL and VIH2.
139/160
ST10F269-T3
Figure 69 : External Clock Drive XTAL1
t3
t1
t4
VIL
VIH2
t2
tOSC
21.4.9 - Memory Cycle Variables
The tables below use three variables which are derived from the BUSCONx registers and represent the
special characteristics of the programmed memory cycle. The following table describes, how these
variables are to be computed.
Description
Symbol
Values
ALE Extension
tA
TCL x [ALECTL]
Memory Cycle Time wait states
tC
2TCL x (15 - [MCTC])
Memory Tri-state Time
tF
2TCL x (1 - [MTTC])
140/160
ST10F269-T3
21.4.10 - Multiplexed Bus
VDD = 5V ± 10%, VSS = 0V, TA = -40 to +125°C, CL = 50pF,
ALE cycle time = 6 TCL + 2tA + tC + tF (187.5ns at 32MHz CPU clock without wait states).
Table 35 : Multiplexed Bus Characteristics
Parameter
Variable CPU Clock
1/2 TCL = 1 to 32MHz
Minimum
Maximum
Minimum
Maximum
Unit
Symbol
Maximum CPU Clock =
32MHz
t5
CC
ALE high time
5.625 + tA
–
TCL - 10 + tA
–
ns
t6
CC
Address setup to ALE
0.625 + tA
–
TCL - 15+ tA
–
ns
t7
CC
Address hold after ALE
5.625 + tA
–
TCL - 10 + tA
–
ns
t8
CC
ALE falling edge to RD, WR
(with RW-delay)
5.625 + tA
–
TCL - 10 + tA
–
ns
t9
CC
ALE falling edge to RD, WR (no
RW-delay)
-10 + tA
–
-10 + tA
–
ns
t10
CC
Address float after RD, WR
(with RW-delay)
–
6
–
6
ns
1
t11
CC
Address float after RD, WR
(no RW-delay)
–
21.625
–
TCL + 6
ns
1
t12
CC
RD, WR low time
(with RW-delay)
21.25 + tC
–
2TCL - 10 + tC
–
ns
t13
CC
RD, WR low time
(no RW-delay)
36.875 + tC
–
3TCL - 10 + tC
–
ns
t14
SR
RD to valid data in
(with RW-delay)
–
11.25 + tC
–
2TCL - 20+ tC
ns
t15
SR
RD to valid data in
(no RW-delay)
–
26.875 + tC
–
3TCL - 20+ tC
ns
t16
SR
ALE low to valid data in
–
26.875 + tA + tC
–
3TCL - 20
+ tA + tC
ns
t17
SR
Address/Unlatched CS to valid
data in
–
32.5 + 2tA + tC
–
4TCL - 30
+ 2tA + tC
ns
t18
SR
Data hold after RD
rising edge
0
–
0
–
ns
t19
SR
Data float after RD
–
17.25 + tF
–
2TCL - 14 + tF
ns
t22
CC
Data valid to WR
11.25 + tC
–
2TCL - 20 + tC
–
ns
t23
CC
Data hold after WR
17.25 + tF
–
2TCL - 14 + tF
–
ns
t25
CC
ALE rising edge after RD, WR
17.25 + tF
–
2TCL - 14 + tF
–
ns
1
1
141/160
ST10F269-T3
Symbol
Maximum CPU Clock =
32MHz
Parameter
Variable CPU Clock
1/2 TCL = 1 to 32MHz
Unit
Table 35 : Multiplexed Bus Characteristics
Minimum
Maximum
Minimum
Maximum
17.25 + tF
–
2TCL - 14 + tF
–
ns
t27
CC
Address/Unlatched CS hold
after RD, WR
t38
CC
ALE falling edge to Latched CS
-4 - tA
10 - tA
-4 - tA
10 - tA
ns
t39
SR
Latched CS low to Valid Data In
–
26.875 + tC + 2tA
–
3TCL - 20
+ tC + 2tA
ns
t40
CC
Latched CS hold after RD, WR
32.875 + tF
–
3TCL - 14 + tF
–
ns
t42
CC
ALE fall. edge to RdCS, WrCS
(with RW delay)
11.625 + tA
–
TCL - 4 + tA
–
ns
t43
CC
ALE fall. edge to RdCS, WrCS
(no RW delay)
-4 + tA
–
-4 + tA
–
ns
t44
CC
Address float after RdCS,
WrCS (with RW delay)
–
0
–
0
ns
1
t45
CC
Address float after RdCS,
WrCS (no RW delay)
–
15.625
–
TCL
ns
1
t46
SR
RdCS to Valid Data In
(with RW delay)
–
7.25 + tC
–
2TCL - 24 + tC
ns
t47
SR
RdCS to Valid Data In
(no RW delay)
–
22.875 + tC
–
3TCL - 24 + tC
ns
t48
CC
RdCS, WrCS Low Time
(with RW delay)
21.25 + tC
–
2TCL - 10 + tC
–
ns
t49
CC
RdCS, WrCS Low Time
(no RW delay)
36.875 + tC
–
3TCL - 10 + tC
–
ns
t50
CC
Data valid to WrCS
17.25 + tC
–
2TCL - 14+ tC
–
ns
t51
SR
Data hold after RdCS
0
–
0
–
ns
t52
SR
Data float after RdCS
–
11.25 + tF
–
2TCL - 20 + tF
ns
t54
CC
Address hold after
RdCS, WrCS
11.25 + tF
–
2TCL - 20 + tF
–
ns
t56
CC
Data hold after WrCS
11.25 + tF
–
2TCL - 20 + tF
–
ns
1
Note: 1. Partially tested, guaranteed by design characterization.
142/160
ST10F269-T3
Figure 70 : External Memory Cycle: Multiplexed Bus, With / Without Read / Write Delay, Normal ALE
CLKOUT
t5
t25
t16
ALE
t6
t38
t17
t40
t27
t39
CSx
t6
t27
t17
A23-A16
(A15-A8)
BHE
Address
t16
Read Cycle
Address/Data
Bus (P0)
t6m
t7
t18
Data In
Address
t10
t8
Address
t19
t14
RD
t13
t9
t11
t15
Write Cycle
Address/Data
Bus (P0)
t12
t23
Data Out
Address
t8
WR
WRL
WRH
t22
t9
t12
t13
143/160
ST10F269-T3
Figure 71 : External Memory Cycle: Multiplexed Bus, With / Without Read / Write Delay, Extended ALE
CLKOUT
t16
t5
t25
ALE
t6
t38
t40
t17
t39
t27
CSx
t6
t17
A23-A16
(A15-A8)
BHE
Address
t27
Read Cycle
Address/Data
Bus (P0)
t6
t7
Data In
Address
t8
t9
t18
t10
t19
t11
t14
RD
t15
t12
t13
Write Cycle
Address/Data
Bus (P0)
Address
Data Out
t23
t8
t9
WR
WRL
WRH
144/160
t10
t11
t13
t22
t12
ST10F269-T3
Figure 72 : External Memory Cycle: Multiplexed Bus, With / Without Read / Write Delay, Normal ALE,
Read / Write Chip Select
CLKOUT
t5
t25
t16
ALE
t6
t27
t17
A23-A16
(A15-A8)
BHE
Address
t16
Read Cycle
Address/Data
Bus (P0)
t6
t7
t51
Address
Address
Data In
t44
t42
t52
t46
RdCSx
t49
t43
t45
t47
Write Cycle
Address/Data
Bus (P0)
t48
t56
Address
Data Out
t42
WrCSx
t50
t43
t48
t49
145/160
ST10F269-T3
Figure 73 : External Memory Cycle: Multiplexed Bus, With / Without Read / Write Delay, Extended ALE,
Read / Write Chip Select
CLKOUT
t16
t5
t25
ALE
t6
t17
A23-A16
(A15-A8)
BHE
Address
t54
Read Cycle
Address/Data
Bus (P0)
t6
t7
Data In
Address
t42
t43
t18
t44
t19
t45
t46
RdCSx
t48
t47
t49
Write Cycle
Address/Data
Bus (P0)
Address
Data Out
t42
t43
t56
t44
t45
t50
WrCSx
t48
t49
146/160
ST10F269-T3
21.4.11 - Demultiplexed Bus
VDD = 5V ± 10%, VSS = 0V, TA = -40 to +125°C, CL = 50pF,
ALE cycle time = 4 TCL + 2tA + tC + tF (125ns at 32MHz CPU clock without wait states). . RW-delay and
Table 36 : Demultiplexed Bus Characteristics
Symbol
Parameter
Maximum CPU Clock =
32MHz
Variable CPU Clock
1/2 TCL = 1 to 32MHz
Minimum
Maximum
Minimum
Maximum
Unit
t5
CC
ALE high time
5.625 + tA
–
TCL - 10+ tA
–
ns
t6
CC
Address setup to ALE
0.625 + tA
–
TCL - 15+ tA
–
ns
t80
CC
Address/Unlatched CS setup
to RD, WR
(with RW-delay)
21.25 + 2tA
–
2TCL - 10 + 2tA
–
ns
t81
CC
Address/Unlatched CS setup
to RD, WR
(no RW-delay)
5.625 + 2tA
–
TCL -10 + 2tA
–
ns
t12
CC
RD, WR low time
(with RW-delay)
21.25 + tC
–
2TCL - 10 + tC
–
ns
t13
CC
RD, WR low time
(no RW-delay)
36.875 + tC
–
3TCL - 10 + tC
–
ns
t14
SR
RD to valid data in
(with RW-delay)
–
11.25 + tC
–
2TCL - 20 + tC
ns
t15
SR
RD to valid data in
(no RW-delay)
–
26.875 + tC
–
3TCL - 20 + tC
ns
t16
SR
ALE low to valid data in
–
26.875 + tA +
tC
–
3TCL - 20
+ tA + tC
ns
t17
SR
Address/Unlatched CS to
valid data in
–
32.5 + 2tA +
tC
–
4TCL - 30
+ 2tA + tC
ns
t18
SR
Data hold after RD
rising edge
0
–
0
–
ns
t20
SR
Data float after RD rising
edge (with RW-delay)1 - 3
–
26 + tF
–
2TCL - 14
+ tF + 2tA1
ns
t21
SR
Data float after RD rising
edge (no RW-delay) 1 - 3
–
5.625 + tF
–
TCL - 10
+ tF + 2tA1
ns
t22
CC
Data valid to WR
11.25 + tC
–
2TCL- 20 + tC
–
ns
t24
CC
Data hold after WR
5.625 + tF
–
TCL - 10+ tF
–
ns
t26
CC
ALE rising edge after RD, WR
-10 + tF
–
-10 + tF
–
ns
t28
CC
Address/Unlatched CS hold
after RD, WR 2
0 (no tF)
–
0 (no tF)
–
ns
t28h
CC
Address/Unlatched CS hold
-5 + tF
–
-5 + tF
–
ns
t38
CC
ALE falling edge to Latched
CS
-4 - tA
10 - tA
-4 - tA
10 - tA
ns
t39
SR
Latched CS low to Valid Data
In
–
26.875 + tC+
2tA
–
3TCL - 20
+ tC + 2tA
ns
-5 + tF
(tF > 0)
-5 + tF
(tF > 0)
after WRH
147/160
ST10F269-T3
Table 36 : Demultiplexed Bus Characteristics
Symbol
Parameter
Maximum CPU Clock =
32MHz
Variable CPU Clock
1/2 TCL = 1 to 32MHz
Unit
Minimum
Maximum
Minimum
Maximum
1.625 + tF
–
TCL - 14 + tF
–
ns
t41
CC
Latched CS hold after RD,
WR
t82
CC
Address setup to RdCS,
WrCS
(with RW-delay)
17.25 + 2tA
–
2TCL - 14 + 2tA
–
ns
t83
CC
Address setup to RdCS,
WrCS
(no RW-delay)
1.625 + 2tA
–
TCL -14 + 2tA
–
ns
t46
SR
RdCS to Valid Data In
(with RW-delay)
–
7.25 + tC
–
2TCL - 24 + tC
ns
t47
SR
RdCS to Valid Data In
(no RW-delay)
–
22.875 + tC
–
3TCL - 24 + tC
ns
t48
CC
RdCS, WrCS Low Time
(with RW-delay)
21.25 + tC
–
2TCL - 10 + tC
–
ns
t49
CC
RdCS, WrCS Low Time
(no RW-delay)
36.875 + tC
–
3TCL - 10 + tC
–
ns
t50
CC
Data valid to WrCS
17.25 + tC
–
2TCL - 14 + tC
–
ns
t51
SR
Data hold after RdCS
0
–
0
–
ns
t53
SR
Data float after RdCS
(with RW-delay) 3
–
21.25 + tF
–
2TCL - 10 + tF
ns
t68
SR
Data float after RdCS
(no RW-delay) 3
–
0 + tF
–
TCL - 10 + tF
ns
t55
CC
Address hold after
RdCS, WrCS
-10 + tF
–
-10 + tF
–
ns
t57
CC
Data hold after WrCS
1.625 + tF
–
TCL - 14 + tF
–
ns
tA refer to the next following bus cycle.
2. Read data are latched with the same clock edge that triggers the address change and the rising RD edge. Therefore address
changes before the end of RD have no impact on read cycles.
3. Partially tested, guaranteed by design characterization.
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ST10F269-T3
Figure 74 : External Memory Cycle: Demultiplexed Bus, With / Without Read / Write Delay, Normal ALE
CLKOUT
t5
t26
t16
ALE
t6
t38
t41
t17
t41u 1)
t39
CSx
t6
A23-A16
A15-A0 (P1)
BHE
t28 (or t28h)
t17
Address
t18
Read Cycle
Data Bus (P0)
(D15-D8) D7-D0
Data In
t80
t81
t20
t14
t21
t15
RD
t12
t13
Write Cycle
Data Bus (P0)
(D15-D8) D7-D0
Data Out
t80
t22
t81
WR
WRL
WRH
t24
t12
t13
Note: 1. Un-latched CSx = t41u = t41 TCL =10.5 + tF.
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ST10F269-T3
Figure 75 : External Memory Cycle: Demultiplexed Bus, With / Without Read / Write Delay, Extended ALE
CLKOUT
t5
t26
t16
ALE
t6
t38
t41
t17
t28
t39
CSx
t6
t28
t17
A23-A16
A15-A0 (P1)
BHE
Address
t18
Read Cycle
Data Bus (P0)
(D15-D8) D7-D0
Data In
t20
t14
t80
t15
t81
t21
RD
t12
t13
Write Cycle
Data Bus (P0)
(D15-D8) D7-D0
Data Out
t80
t81
t22
WR
WRL
WRH
t12
t13
150/160
t24
ST10F269-T3
Figure 76 : External Memory Cycle: Demultiplexed Bus, With / Without Read / Write Delay, Normal ALE,
Read / Write Chip Select
CLKOUT
t5
t26
t16
ALE
t6
A23-A16
A15-A0 (P1)
BHE
t17
t55
Address
t51
Read Cycle
Data Bus (P0)
(D15-D8) D7-D0
Data In
t82
t83
t53
t46
t68
t47
RdCSx
t48
t49
Write Cycle
Data Bus (P0)
(D15-D8) D7-D0
Data Out
t82
t50
t83
t57
WrCSx
t48
t49
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ST10F269-T3
Figure 77 : External Memory Cycle: Demultiplexed Bus, no Read / Write Delay, Extended ALE, Read /
Write Chip Select
CLKOUT
t5
t26
t16
ALE
t6
t55
t17
A23-A16
A15-A0 (P1)
BHE
Address
t51
Read Cycle
Data Bus (P0)
(D15-D8) D7-D0
Data In
t53
t46
t82
t47
t83
t68
RdCSx
t48
t49
Write Cycle
Data Bus (P0)
(D15-D8) D7-D0
Data Out
t82
t83
t50
WrCSx
t48
t49
152/160
t57
ST10F269-T3
21.4.12 - CLKOUT and READY
VDD = 5V ± 10%, VSS = 0V, TA = -40 to + 125°C, CL = 50pF
Symbol
Maximum CPU Clock
= 32MHz
Parameter
Variable CPU Clock
1/2TCL = 1 to 32MHz
Minimum
Maximum
Minimum
Maximum
Unit
Table 37 : CLKOUT and READY Characteristics
t29
CC
CLKOUT cycle time
31.25
31.25
2TCL
2TCL
ns
t30
CC
CLKOUT high time
9.625
–
TCL – 6
–
ns
t31
CC
CLKOUT low time
5.625
–
TCL – 10
–
ns
t32
CC
CLKOUT rise time
–
4
–
4
ns
t33
CC
CLKOUT fall time
–
4
–
4
ns
t34
CC
CLKOUT rising edge to
ALE falling edge
-3 + tA
+7 + tA
-3 + tA
+7 + tA
ns
t35
SR
Synchronous READY
setup time to CLKOUT
14
–
14
–
ns
t36
SR
Synchronous READY
hold time after CLKOUT
4
–
4
–
ns
t37
SR
Asynchronous READY
low time
45.25
–
2TCL + 14
–
ns
t58
SR
Asynchronous READY
setup time
14
–
14
–
ns
1)
t59
SR
Asynchronous READY
hold time
4
–
4
–
ns
1)
t60
SR
0
0 + 2tA
+ tC + tF 2
0
TCL - 15.625 +
2tA + tC + tF 2
ns
Async. READY hold time after
RD, WR high (Demultiplexed
2)
Bus)
Notes: 1. These timings are given for test purposes only, in order to assure recognition at a specific clock edge.
2. Demultiplexed bus is the worst case. For multiplexed bus 2TCL are to be added to the maximum values. This adds even more time
for deactivating READY.
The 2tA and tC refer to the next following bus cycle, tF refers to the current bus cycle.
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ST10F269-T3
Figure 78 : CLKOUT and READY
READY
wait state
Running cycle 1)
CLKOUT
t32
MUX / Tri-state 6)
t33
t30
t29
t31
t34
ALE
7)
RD, WR
2)
t35
Synchronous
READY
Asynchronous
READY
t36
t35
3)
3)
t58
t59
3)
t36
t58
t59
t60 4)
3)
t37
5)
6)
Notes: 1. Cycle as programmed, including MCTC wait states (Example shows 0 MCTC WS).
2. The leading edge of the respective command depends on RW-delay.
3. READY sampled HIGH at this sampling point generates a READY controlled wait state, READY sampled LOW at this sampling
point terminates the currently running bus cycle.
4. READY may be deactivated in response to the trailing (rising) edge of the corresponding command (RD or WR).
5. If the Asynchronous READY signal does not fulfill the indicated setup and hold times with respect to CLKOUT (e.g. because
CLKOUT is not enabled), it must fulfill t37 in order to be safely synchronized. This is guaranteed, if READY is removed in response to
the command (see Note 4)).
6. Multiplexed bus modes have a MUX wait state added after a bus cycle, and an additional MTTC wait state may be inserted here.
For a multiplexed bus with MTTC wait state this delay is 2 CLKOUT cycles, for a demultiplexed bus without MTTC wait state this
delay is zero.
7. The next external bus cycle may start here.
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ST10F269-T3
21.4.13 - External Bus Arbitration
VDD = 5V ± 10%, VSS = 0V, TA = -40 to +125°C, CL = 50pF
Symbol
Maximum CPU Clock
= 32MHz
Parameter
Variable CPU Clock
1/2TCL = 1 to 32MHz
Minimum
Maximum
Minimum
Maximum
Unit
t61
SR
HOLD input setup time
to CLKOUT
20
–
20
–
ns
t62
CC
CLKOUT to HLDA high
or BREQ low delay
–
15.625
–
15.625
ns
t63
CC
CLKOUT to HLDA low
or BREQ high delay
–
15.625
–
15.625
ns
t64
CC
CSx release
–
15
–
15
ns
t65
CC
CSx drive
-4
15
-4
15
ns
t66
CC
Other signals release
–
15
–
15
ns
t67
CC
Other signals drive
-4
15
-4
15
ns
1
1
Note: 1. Partially tested, guaranteed by design characterization.
Figure 79 : External Bus Arbitration (Releasing the Bus)
CLKOUT
t61
HOLD
t63
HLDA
1)
t62
BREQ
2)
t64
3)
CSx
(P6.x)
1)
t66
Others
Notes: 1. The ST10F269-T3 will complete the currently running bus cycle before granting bus access.
2. This is the first possibility for BREQ to become active.
3. The CS outputs will be resistive high (pull-up) after t64.
155/160
ST10F269-T3
Figure 80 : External Bus Arbitration (Regaining the Bus)
2)
CLKOUT
t61
HOLD
t62
HLDA
t62
BREQ
t62
t63
1)
t65
CSx
(On P6.x)
t67
Other
Signals
Notes: 1. This is the last chance for BREQ to trigger the indicated regain-sequence. Even if BREQ is activated earlier, the regain-sequence
is initiated by HOLD going high. Please note that HOLD may also be de-activated without the ST10F269-T3 requesting the bus.
2. The next ST10F269-T3 driven bus cycle may start here.
156/160
ST10F269-T3
21.4.14 - High-Speed Synchronous Serial Interface (SSC) Timing
21.4.14.1 Master Mode
VCC = 5V ±10%, VSS = 0V, CPU clock = 32MHz, TA = -40 to +125°C, CL = 50pF
Symbol
t300
t301
t302
t303
t304
t305
t306
t307p
t308p
t307
t308
Maximum Baud rate = 8M Baud
(<SSCBR> = 0001h)
Parameter
Variable Baud rate
(<SSCBR>=0001h-FFFFh) Unit
Minimum
Maximum
Minimum
Maximum
CC SSC clock cycle time
125
–
8 TCL
262144 TCL
ns
CC SSC clock high time
52.5
–
–
ns
CC SSC clock low time
52.5
–
t300/2 - 10
t300/2 - 10
–
ns
CC SSC clock rise time
–
10
–
10
ns
CC SSC clock fall time
–
10
–
10
ns
CC Write data valid after shift edge
–
15
–
15
ns
CC Write data hold after shift edge 1
SR Read data setup time before
latch edge, phase error
detection on (SSCPEN = 1)
SR Read data hold time after latch
edge, phase error detection on
(SSCPEN = 1)
SR Read data setup time before
latch edge, phase error
detection off (SSCPEN = 0)
SR Read data hold time after latch
edge, phase error detection off
(SSCPEN = 0)
-2
–
-2
–
ns
46.875
–
2TCL+15.625
–
ns
62.5
–
4TCL
–
ns
31.25
–
2TCL
–
ns
0
–
0
–
ns
Note: 1. Timing guaranteed by design.
The formula for SSC Clock Cycle time is: t300 = 4 TCL * (<SSCBR> + 1)
Where <SSCBR> represents the content of the SSC Baud rate register, taken as unsigned 16-bit integer.
00 t 0
00 00
00 00
00 t 000 00
0 0 0 00
00 t 00 t
0 0
Figure 81 : SSC Master Timing
1)
SCLK
300
301
304
305
MTSR
305
1st Out Bit
307
MRST
00 t 0 0 t
00 00 00
00 t 0 0
0 t 000
00 0
00
302
00 00
00 00
00 t 0t
00
0
2nd Out Bit
308
1st.In Bit
2nd.In Bit
303
306
2)
00
00
00 t
00
00
00
00 t
00
305
00
00
00
00
00 t 00
0 00
Last Out Bit
307
308
Last.In Bit
00
00
0000 00 00
Notes: 1. The phase and polarity of shift and latch edge of SCLK is programmable. This figure uses the leading clock edge as shift edge (drawn
in bold), with latch on trailing edge (SSCPH = 0b), Idle clock line is low, leading clock edge is low-to-high transition (SSCPO = 0b).
2. The bit timing is repeated for all bits to be transmitted or received.
157/160
ST10F269-T3
21.4.14.2 Slave mode
VCC = 5V ±10%, VSS = 0V, CPU clock = 32MHz, TA = -40 to +125°C, CL = 50pF
Symbol
Maximum Baud rate=6.25MBd
Variable Baud rate
(<SSCBR> = 0001h)
(<SSCBR>=0001h-FFFFh)
Parameter
Minimum
Maximum
Minimum
Maximum
Unit
t310
SR SSC clock cycle time
125
–
8 TCL
262144 TCL
ns
t311
SR SSC clock high time
52.5
–
t310/2 - 10
–
ns
t312
SR SSC clock low time
52.5
–
t310/2 - 10
–
ns
t313
SR SSC clock rise time
–
10
–
10
ns
t314
SR SSC clock fall time
–
10
–
10
ns
t315
CC Write data valid after shift edge
–
45.25
–
2 TCL + 14
ns
t316
CC Write data hold after shift edge
0
–
0
–
ns
t317p
SR Read data setup time before latch edge,
phase error detection on (SSCPEN = 1)
78.125
–
4TCL +
15.625
–
ns
t318p1
SR Read data hold time after latch edge,
phase error detection on (SSCPEN = 1)
109.375
–
6TCL +
15.625
–
ns
t317
SR Read data setup time before latch edge,
phase error detection off (SSCPEN = 0)
6
–
6
–
ns
t318
SR Read data hold time after latch edge,
phase error detection off (SSCPEN = 0)
41.25
–
2TCL + 10
–
ns
The formula for SSC Clock Cycle time is: t310 = 4 TCL * (<SSCBR> + 1)
Where <SSCBR> represents the content of the SSC Baud rate register, taken as unsigned 16-bit integer.
Figure 82 : SSC Slave Timing
1)
SCLK
00
00
00 t
00
00
0
315
MRST
MTSR
00
00
00
00
00 t
00
0
t310
00 t
00
311
314
315
1st Out Bit
317
00 t 00 00 t
00 00 00
00 t t 0
0 00
00
00
312
00 00
00 00
00 t 0t
0
0
2nd Out Bit
318
1st.In Bit
2)
313
316
00 00
00 00
00 t 0 00
00 00 00
00 t 000 t
00 00
315
Last Out Bit
317
2nd.In Bit
00
00
318
Last.In Bit
Notes: 1. The phase and polarity of shift and latch edge of SCLK is programmable. This figure uses the leading clock edge as shift edge (drawn
in bold), with latch on trailing edge (SSCPH = 0b), Idle clock line is low, leading clock edge is low-to-high transition (SSCPO = 0b).
2. The bit timing is repeated for all bits to be transmitted or received.
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ST10F269-T3
22 - PACKAGE MECHANICAL DATA
Figure 83 : Package Outline TQFP144 (20 x 20 x 1.40 mm)
A
A2
e
144
A1
109
108
36
73
E3
E1
E
B
1
0,076 mm
0.03 inch
SEATING PLANE
c
72
L1
D3
D1
D
L
37
K
0,25 mm
.010 inch
GAGE PLANE
Millimeters 1
Inches (approx)
Dimensions
Minimum
Typical
A
Maximum
Minimum
Typical
1.60
A1
0.05
0.15
0.063
0.002
0.006
A2
1.35
1.40
1.45
0.053
0.055
B
0.17
0.22
0.27
0.0067
0.0087
C
0.09
0.20
0.0035
D
22.00
0.866
20.00
0.787
D3
17.50
0.689
e
0.50
0.020
E
22.00
0.866
E1
20.00
0.787
17.50
L
0.45
L1
0.60
0.011
0.689
0.75
0.018
0.024
1.00
K
0.057
0.008
D1
E3
Maximum
0.030
0.039
0° (Minimum), 7° (Maximum)
Note: 1. Package dimensions are in mm. The dimensions quoted in inches are rounded.
23 - ORDERING INFORMATION
Salestype
Temperature range
Package
ST10F269-T3
-40°C to + 125°C
TQFP144 (20 x 20 x 1.40 mm)
159/160
ST10F269-T3
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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160/160
F269-T3.REF
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