STMICROELECTRONICS ST10F280_12

ST10F280
16-bit MCU with MAC unit,
512 Kbyte Flash memory and 18 Kbyte RAM
Datasheet − production data
Features
■
■
■
■
High performance cpu with dsp functions
– 16-bit CPU with 4-stage pipeline.
– 50ns Instruction cycle time at 40MHz 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
PBGA208 (23 x 23 x 1.96 - Pitch 1.27 mm)
(Plastic Bold Grid Array)
ORDER CODE: ST10F280-JT3
■
A/D converter
– 2X16-channel 10-bit
– 4.85μs conversion time
– One timer for adc channel injection
■
8-channel PWM unit
Memory organization
– 512KB on-chip Flash memory single
voltage with erase/program controller
– 100K erasing/programming cycles
– 20 year data retention time
– Up to 16MB linear address space for code
and data (5MB with CAN)
– 2KB on-chip internal ram (IRAM)
– 16KB extension RAM (XRAM)
■
Serial channels
– Synchronous/async serial channel
– High-speed synchronous channel
■
Fail-safe protection
– Programmable watchdog timer
– Oscillator watchdog
■
Two CAN 2.0b interfaces operating on one or
two can busses (30 or 2x15 message objects)
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
■
On-chip bootstrap loader
■
Clock generation
– On-chip PLL
– Direct or prescaled clock input
■
Up to 143 general purpose i/o lines
– Individually programmable as input, output
or special function
– Programmable threshold (hysteresis)
Interrupt
– 8-channel peripheral event controller for
single cycle, interrupt driven data transfer
– 16-priority-level interrupt system with 56
sources, sample-rate down to 25ns
■
Idle and power down modes
■
Maximum cpu frequency 40MHz
■
Package PBGA 208 balls (23 x 23 x 1.96 mm pitch 1.27 mm)
■
Single voltage supply: 5 V ±10% (embedded
regulator for 3.3 V core supply)
■
Temperature range: -40°C to 125°C
■
Two multi-functional general purpose timer
units with 5 timers
■
Two 16-channel capture/compare units
August 2012
This is information on a product in full production.
Doc ID 8673 Rev. 3
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www.st.com
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Contents
ST10F280
Contents
1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2
Ball data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4
Memory organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.1
5
Visibility of XBUS peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Internal Flash memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.2
Operational overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.3
5.2.1
Read mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.2.2
Instructions and commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.2.3
Status register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2.4
Erase operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2.5
Erase suspend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2.6
In-system programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2.7
Read/write protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2.8
Power supply, reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Architectural description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.1
Read mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.2
Command mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.3
Flash Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.3.4
Flash Protection Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.3.5
Instructions description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.3.6
Reset processing and initial State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.4
Flash memory configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.5
Application examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.6
5.5.1
Handling of Flash addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.5.2
Basic Flash access control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.5.3
Programming examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Bootstrap loader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
5.6.1
2/239
Entering the bootstrap loader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
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Contents
5.6.2
Memory configuration after reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5.6.3
Loading the startup code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.6.4
Exiting bootstrap loader mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.6.5
Choosing the baud rate for the BSL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Central Processing Unit (CPU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.1
Multiplier-accumulator Unit (MAC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.1.1
7
8
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.2
Instruction set summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.3
MAC coprocessor specific instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
External bus controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.1
Programmable chip select timing control . . . . . . . . . . . . . . . . . . . . . . . . . 63
7.2
READY programmable polarity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Interrupt system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
8.1
External interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
8.2
Interrupt registers and vectors location list . . . . . . . . . . . . . . . . . . . . . . . . 68
8.3
Interrupt Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
8.4
Exception and error traps list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
9
Capture/Compare (CAPCOM) units . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
10
General purpose timer unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
11
10.1
GPT1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
10.2
GPT2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
PWM module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
11.1
Standard PWM module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
11.2
New PWM module: XPWM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
11.2.1
Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
11.2.2
XPWM module registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
11.2.3
XPWM Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
11.2.4
Interrupt request generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
11.2.5
XPWM output signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
11.2.6
XPOLAR Register (polarity of the XPWM channel) . . . . . . . . . . . . . . . . 92
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Contents
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ST10F280
Parallel ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
12.1
12.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
12.1.1
Open drain mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
12.1.2
Input threshold control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
12.1.3
Output driver control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
12.1.4
Alternate port functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Port 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
12.2.1
12.3
Port 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
12.3.1
12.4
Alternate functions of Port 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Port 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
12.8.1
12.9
Alternate functions of Port 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Port 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
12.7.1
12.8
Alternate functions of Port 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Port 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
12.6.1
12.7
Alternate functions of Port 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Port 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
12.5.1
12.6
Alternate functions of Port 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Port 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
12.4.1
12.5
Alternate functions of Port 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Alternate functions of Port 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Port 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
12.9.1
Alternate functions of Port 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
12.10 Port 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
12.10.1 Alternate functions of Port 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
12.11 XPort 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
12.12 XPort 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
12.12.1 Alternate functions of XPort 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
12.12.2 New disturb protection on analog inputs . . . . . . . . . . . . . . . . . . . . . . . 139
13
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A/D converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
13.1
A/D converter module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
13.2
Multiplexage of two blocks of 16 analog Inputs . . . . . . . . . . . . . . . . . . . 140
13.3
XTIMER peripheral (trigger for ADC channel injection) . . . . . . . . . . . . . 141
13.3.1
Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
13.3.2
Register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
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Contents
13.3.3
14
Serial channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
14.1
14.2
Asynchronous / Synchronous Serial Interface (ASCO) . . . . . . . . . . . . . 148
14.1.1
ASCO in asynchronous mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
14.1.2
ASCO in synchronous mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
High speed synchronous serial channel (SSC) . . . . . . . . . . . . . . . . . . . 152
14.2.1
15
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Baud rate generation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
CAN modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
15.1
15.2
Memory mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
15.1.1
CAN1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
15.1.2
CAN2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
CAN bus configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
15.2.1
Single CAN bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
15.2.2
Multiple CAN bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
15.3
Register and message object organization . . . . . . . . . . . . . . . . . . . . . . 157
15.4
CAN interrupt handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
15.4.1
Bit timing configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
15.4.2
Mask registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
15.5
The message object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
15.6
Arbitration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
16
Watchdog timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
17
System reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
17.1
17.2
Asynchronous reset (long hardware reset) . . . . . . . . . . . . . . . . . . . . . . 171
17.1.1
Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
17.1.2
Hardware reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
17.1.3
Exit of asynchronous reset state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Synchronous reset (warm reset) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
17.2.1
Exit of synchronous reset state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
17.3
Software reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
17.4
Watchdog timer reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
17.5
RSTOUT pin and bidirectional reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
17.6
Reset circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
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Power reduction modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
18.1
Idle mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
18.2
Power down mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
18.2.1
Protected power down mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
18.2.2
Interruptable power down mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Special function register overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
19.1
Identification registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
19.2
System configuration registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
20.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
20.2
Parameter interpretation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
20.3
DC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
20.4
20.3.1
A/D converter characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
20.3.2
Conversion timing control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
20.4.1
Test waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
20.4.2
Definition of internal timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
20.4.3
Clock generation modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
20.4.4
Prescaler operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
20.4.5
Direct drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
20.4.6
Oscillator Watchdog (OWD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
20.4.7
Phase locked loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
20.4.8
External clock drive XTAL1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
20.4.9
Memory cycle variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
20.4.10 Multiplexed bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
20.4.11 Demultiplexed bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
20.4.12 CLKOUT and READY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
20.4.13 External bus arbitration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
20.4.14 High-speed synchronous serial interface (SSC) timing . . . . . . . . . . . . 231
21
6/239
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
21.1
ECOPACK® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
21.2
PBGA 208 (23 x 23 x 1.96 mm) mechanical data . . . . . . . . . . . . . . . . . 235
Doc ID 8673 Rev. 3
ST10F280
Contents
22
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
23
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Doc ID 8673 Rev. 3
7/239
List of tables
ST10F280
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.
Table 19.
Table 20.
Table 21.
Table 22.
Table 23.
Table 24.
Table 25.
Table 26.
Table 27.
Table 28.
Table 29.
Table 30.
Table 31.
Table 32.
Table 33.
Table 34.
Table 35.
Table 36.
Table 37.
Table 38.
Table 39.
Table 40.
Table 41.
Table 42.
Table 43.
Table 44.
Table 45.
Table 46.
Table 47.
Table 48.
8/239
Ball description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
512 Kbyte Flash memory block organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Instruction set summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
MAC coprocessor specific instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Pointer post-modification combinations for IDXi and Rwn . . . . . . . . . . . . . . . . . . . . . . . . . 60
MAC registers referenced as ‘CoReg‘ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Interrupt sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Exceptions or error conditions that can arise during run-time. . . . . . . . . . . . . . . . . . . . . . . 74
Compare modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
CAPCOM timer input frequencies, resolution and periods . . . . . . . . . . . . . . . . . . . . . . . . . 77
GPT1 timer input frequencies, resolution and periods . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
GPT2 timer input frequencies, resolution and period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
PWM unit frequencies and resolution at 40MHz CPU clock . . . . . . . . . . . . . . . . . . . . . . . . 81
XPWM module channel specific register addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
XPWM frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
POCON registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Port 2 alternate function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Port 3 alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Port 4 alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Port 5 alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Port 6 alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Port 7 alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Port 8 alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
XPort 10 alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
The different counting Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Timer registers mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Commonly used baud rates by reload value and deviation errors . . . . . . . . . . . . . . . . . . 150
Commonly used baud rates by reload value and deviation errors . . . . . . . . . . . . . . . . . . 152
Synchronous baud rate and reload values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
INTID values and corresponding interrupt sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Functions of complementary bit of message control register . . . . . . . . . . . . . . . . . . . . . . 166
WDTCON bits value on different resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
WDTREL reload value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Reset event definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
PORT0 latched configuration for the different resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
PORT0 bit latched into the different registers after reset . . . . . . . . . . . . . . . . . . . . . . . . . 179
Special function registers listed by name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
X registers listed by name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Stack size selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
DC characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
A/D converter characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
ADC sampling and conversion timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
CPU frequency generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
External clock drive XTAL1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Memory cycle variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Multiplexed bus characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Doc ID 8673 Rev. 3
ST10F280
Table 49.
Table 50.
Table 51.
Table 52.
Table 53.
Table 54.
Table 55.
Table 56.
List of tables
Demultiplexed bus characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
CLKOUT and READY characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
External bus arbitration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
SSC master timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
SSC slave timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
PBGA 208 (23 x 23 x 1.96 mm) mechanical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Doc ID 8673 Rev. 3
9/239
List of figures
ST10F280
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
Figure 27.
Figure 28.
Figure 29.
Figure 30.
Figure 31.
Figure 32.
Figure 33.
Figure 34.
Figure 35.
Figure 36.
Figure 37.
Figure 38.
Figure 39.
Figure 40.
Figure 41.
Figure 42.
Figure 43.
Figure 44.
Figure 45.
Figure 46.
Figure 47.
Figure 48.
10/239
Logic symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Ball Configuration (bottom view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
ST10F280 on-chip memory mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Bootstrap loader sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Hardware provisions to activate the BSL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Memory configuration after reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Baud rate deviation between host and ST10F280 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
CPU block diagram (MAC unit not included) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
MAC unit architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Chip select delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
CAPCOM unit block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Block diagram of CAPCOM timers T0 and T7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Block diagram of CAPCOM timers T1 and T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Block diagram of GPT1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Block diagram of GPT2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Block diagram of PWM module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
SFRs and port pins associated with the XPWM module. . . . . . . . . . . . . . . . . . . . . . . . . . . 82
XPWM channel block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Operation and output waveform in mode 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Operation and output waveform in mode 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Operation and output waveform in burst mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Operation and output waveform in single shot mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
XPWM output signal generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
SFRs associated with the parallel ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
XBUS registers associated with the parallel ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Output drivers in push/pull mode and in open drain mode . . . . . . . . . . . . . . . . . . . . . . . . . 95
Hysteresis for special input thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Port 0 I/O and alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Block diagram of a Port 0 pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Port 1 I/O and alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Block diagram of a Port 1 pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Port 2 I/O and alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Block diagram of a Port 2 pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Port 3 I/O and alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Block diagram of Port 3 pin with alternate input or alternate output function . . . . . . . . . . 114
Block diagram of pins P3.15 (CLKOUT) and P3.12 (BHE/WRH) . . . . . . . . . . . . . . . . . . . 115
Port 4 I/O and alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Block diagram of a Port 4 pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Block diagram of P4.4 and P4.5 pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Block diagram of P4.6 and P4.7 pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Port 5 I/O and alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Block diagram of a Port 5 pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Port 6 I/O and alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Block diagram of Port 6 pins with an alternate output function . . . . . . . . . . . . . . . . . . . . . 126
Port 7 I/O and alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Block diagram of Port 7 pins P7.3...P7.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Block diagram of Port 7 pins P7.7...P7.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Doc ID 8673 Rev. 3
ST10F280
List of figures
Figure 49.
Figure 50.
Figure 51.
Figure 52.
Figure 53.
Figure 54.
Figure 55.
Figure 56.
Figure 57.
Figure 58.
Figure 59.
Figure 60.
Figure 61.
Figure 62.
Figure 63.
Figure 64.
Figure 65.
Figure 66.
Figure 67.
Figure 68.
Figure 69.
Figure 70.
Figure 71.
Figure 72.
Figure 73.
Figure 74.
Figure 75.
Figure 76.
Figure 77.
Figure 78.
Figure 79.
Figure 80.
Figure 81.
Figure 82.
Port 8 I/O and alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Block diagram of Port 8 pins P8.7...P8.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
PORT10 I/O and alternate functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
XTIMER block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
XADCINJ timer output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
External connection for ADC channel injection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Asynchronous mode of serial channel ASC0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Synchronous mode of serial channel ASC0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Synchronous serial channel SSC block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Single CAN bus multiple interfaces - multiple transceivers. . . . . . . . . . . . . . . . . . . . . . . 156
Single CAN bus dual interfaces - single transceiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Connection to two different CAN buses (e.g. for gateway application). . . . . . . . . . . . . . . 157
CAN module address map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Bit timing definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Message object address map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Asynchronous reset timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Synchronous warm reset (short low pulse on RSTIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Synchronous warm reset (long low pulse on RSTIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Internal (simplified) reset circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Minimum external reset circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
External reset hardware circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
External RC circuit on RPD pin for exiting power down mode with external interrupt . . . 183
Simplified power down exit circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Power down exit sequence when using an external interrupt (PLL x 2) . . . . . . . . . . . . . . 184
Supply / idle current as a function of operating frequency . . . . . . . . . . . . . . . . . . . . . . . . 207
Input / output waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Float waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Generation mechanisms for the CPU clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Approximated maximum PLL Jitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
External clock drive XTAL1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
External memory cycle: multiplexed bus, with / without read / write delay, normal ALE. . 218
External memory cycle: multiplexed bus, with / without read / write delay, extended ALE219
External memory cycle: multiplexed bus, with / without read / write delay, normal ALE,
read / write chip select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
External memory cycle: multiplexed bus, with / without read / write delay, extended ALE,
read / write chip select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
External memory cycle: demultiplexed bus, with / without read / write delay, normal ALE224
External memory cycle: demultiplexed bus, with / without read / write delay, extended ALE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
External memory cycle: demultiplexed bus, with / without read / write delay, normal ALE,
read / write chip select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
External memory cycle: demultiplexed bus, no read / write delay, extended ALE, read /write
chip select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
CLKOUT and READY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
External bus arbitration, releasing the bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
External bus arbitration, (regaining the bus) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
SSC master timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
SSC slave timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Package outline PBGA 208 (23 x 23 x 1.96 mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Figure 83.
Figure 84.
Figure 85.
Figure 86.
Figure 87.
Figure 88.
Figure 89.
Figure 90.
Figure 91.
Figure 92.
Figure 93.
Doc ID 8673 Rev. 3
11/239
Description
1
ST10F280
Description
The ST10F280 is a new derivative of the STMicroelectronics® ST10 family of 16-bit singlechip 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.
ST10F280 is processed in 0.35μm CMOS technology. The MCU core and the logic is
supplied with a 5V to 3.3V 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 ST10F269 device, with the following set of
differences:
12/239
●
Two supply pins (DC1,DC2) on the PBGA-208 package are used for decoupling the
internally generated 3.3V 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 ≥ 330nF).
●
The A/D Converter characteristics stay identical but 16 new input channel are added. A
bit in a new register (XADCMUX) control the multiplexage between the first block of 16
channel (on Port5) and the second block (on XPort10). The conversion result registers
stay identical and the software management can determine the block in use. A new
dedicated timer controls now the ADC channel injection mode on the input CC31
(P7.7). The output of this timer is visible on a dedicated pin (XADCINJ) to emulate this
new functionality.
●
A second XPWM peripheral (4 new channels) is added. Four dedicated pins are
reserved for the outputs (XPWM[0:3])
●
A new general purpose I/O port named XPORT9 (16 bits) is added. Due to the bit
addressing management, it will be different from other standard general purpose I/O
ports.
Doc ID 8673 Rev. 3
ST10F280
Description
Figure 1.
Logic symbol
6$$
633
84!,
84!,
0ORT
BIT
234).
234/54
0ORT
BIT
6!2%&
0ORT
BIT
6!'.$
0ORT
BIT
.-)
%!
2%!$9
!,%
0ORT
BIT
34&
2$
7272,
0ORT
BIT
0ORT
BIT
0ORT
BIT
0ORT
BIT
80ORT
BIT
80ORT
BIT
807BIT
8!$#).*
$#
$#
$ECOUPLINGCAPACITORFORINTERNALREGULATOR
("1($'5
Doc ID 8673 Rev. 3
13/239
Ball data
2
ST10F280
Ball data
The ST10F280 package is a PBGA of 23 x 23 x 1.96 mm. The pitch of the balls is 1.27 mm.
The signal assignment of the 208 balls is described in Figure 2 for the configuration and in
Table 1 for the ball signal assignment. This package has 25 additional thermal balls.
Figure 2.
Ball Configuration (bottom view)
1
U1
U
XP10.15
T1
T
XP10.14
P
N2
XP10.3
L1
L
F
G2
F2
VSS
E
VDD
D1
D
C
P6.7
P6.3
P6.2
VSS
P8.1
P2.6
P9
P2.1
P2.9
P10
P2.5
P2.10
P2.11
R11
P2.12
P11
P2.14
P2.13
T12
P2.15
R12
P3.0
P12
P3.2
13
U13
VSS
T13
P3.1
R13
P3.3
P13
P3.5
L8
L9
VSS
K7
P7.6
VSS
K8
VSS
J7
P7.0
H7
G7
K10
J10
VSS
H10
VSS
G9
VSS
VSS
VSS
H9
VSS
G8
VSS
VSS
VSS
G10
VSS
VSS
VSS
P3.7
P4.2
K14
K11
VSS
P4.6
J14
J11
VSS
RD
H14
H11
VSS
P0.2
G14
G11
VSS
P0.5
P6.6
P0.10
E14
P6.0
P0.15
D5
xpwm.0
D6
VSS
C5
NMI
B4
VSS
P3.6
P14
F14
C4
A3
P3.4
R14
L14
L11
VSS
VSS
J9
VSS
H8
VSS
L10
VSS
K9
VSS
J8
VSS
P8.5
D4
B3
VSS
T14
P3.13
L7
P6.5
P6.1
14
U14
P3.10
E4
xpwm.3 xpwm.1
xpwm.2
P2.2
P2.8
R10
DC2
T11
12
U12
F4
C3
A2
1
14/239
P6.4
P2.4
R9
P8
P5.14
VSS
P8.3
D3
B2
A1
A
P8.0
P2.3
VSS
T10
11
U11
M14
G4
E3
C2
B1
B
P8.2
D2
C1
P8.6
F3
E2
P5.10
H4
G3
P8.4
DC1
P5.15
P2.7
T9
R8
P7
J4
P7.1
H3
P8.7
P5.11
K4
P7.5
J3
P7.2
H2
E1
XADCINJ
K3
P7.4
P5.6
P2.0
R7
P6
VDD
T8
10
U10
XP10.4
L4
VSS
F1
XP10.5
L3
P7.7
P5.12
R6
P5.7
VSS
T7
9
U9
N14
XP10.0
J2
G1
G
XP10.8
P5.13
8
U8
N4
XP10.1
K2
H1
XP10.9
P5.8
7
U7
T6
P5
XP10.2
P7.3
H
P5.3
P4
M4
VDD
J1
P5.1
P5.9
R5
M3
L2
J
P5.4
6
U6
T5
R4
N3
XP10.6
P5.5
M2
VSS
K1
K
P5.2
5
U5
T4
P3
XP10.11 XP10.10
XP10.7
VAGND
R3
P2
M1
M
P5.0
4
U4
T3
XP10.13 XP10.12
N1
N
VAREF
R2
P1
3
U3
T2
R1
R
2
U2
A4
VSS
C6
P1.14
B5
RSTOUT
D7
VSS
P1.13
C7
P1.15
B6
A5
D8
VSS
P1.9
C8
P1.12
B7
A6
D9
P1.11
P1.6
C9
P1.8
B8
A7
D10
P1.7
B9
VSS
A8
RSTIN
VSS
XTAL1
XTAL2
P1.10
VSS
2
3
4
5
6
7
8
P1.3
B10
VSS
A9
VDD
P1.2
C10
P1.4
A10
D11
XP9.14
C11
P1.0
B11
P1.1
A11
VDD
P1.5
VSS
9
10
11
Doc ID 8673 Rev. 3
D12
XP9.11
C12
XP9.13
B12
XP9.15
A12
VDD
12
D13
XP9.5
C13
XP9.10
B13
XP9.12
A13
D14
XP9.2
C14
XP9.6
B14
XP9.9
A14
VSS
VDD
13
14
15
U15
VDD
T15
VSS
R15
P3.8
P15
P3.11
N15
VSS
M15
P4.1
L15
P4.4
K15
P4.7
J15
WR
H15
P0.1
G15
P0.4
F15
P0.8
E15
P0.12
D15
XP9.0
C15
XP9.3
B15
XP9.7
A15
XP9.8
15
16
U16
VSS
T16
VSS
R16
P3.9
P16
P3.12
N16
P4.0
M16
P4.3
L16
P4.5
K16
VSS
J16
READY
H16
P0.0
G16
P0.3
F16
P0.6
E16
P0.9
D16
P0.13
C16
XP9.1
B16
XP9.4
A16
17
U17
VSS
U
T17
P3.15
T
R17
VSS
R
P17
VDD
P
N17
VSS
N
M17
RPD
M
L17
VDD
L
K17
VSS
K
J17
ALE
J
H17
EA
H
G17
VDD
G
F17
VSS
F
E17
P0.7
E
D17
P0.11
D
C17
P0.14
C
B17
VSS
B
A17
VSS
VSS
16
17
A
ST10F280
Ball data
Table 1.
Symbol
P6.0 – P6.7
P8.0 – P8.7
Ball description
Ball
Type
number
Function
I/O
Port 6 is an 8-bit bidirectional I/O port. It is bit-wise programmable
for input or output via direction bits. For a pin configured as input,
the output driver is put into high-impedance state. Port 6 outputs
can be configured as push/pull or open drain drivers.
The following Port 6 pins also serve for alternate functions:
E4
O
P6.0 CS0 Chip Select 0 Output
D3
O
P6.1 CS1 Chip Select 1 Output
B1
O
P6.2 CS2 Chip Select 2 Output
C1
O
P6.3 CS3 Chip Select 3 Output
D2
O
P6.4 CS4 Chip Select 4 Output
E3
I
P6.5 HOLD External Master Hold Request Input
F4
O
P6.6 HLDA Hold Acknowledge Output
D1
O
P6.7 BREQ Bus Request Output
I/O
Port 8 is an 8-bit bidirectional I/O port. It is bit-wise programmable
for input or output via direction bits. For a pin configured as input,
the output driver is put into 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 also serve for alternate functions:
E2
I/O
P8.0 CC16IO CAPCOM2: CC16 Capture Input / Compare Output
F3
I/O
P8.1 CC17IO CAPCOM2: CC17 Capture Input / Compare Output
F2
I/O
P8.2 CC18IO CAPCOM2: CC18 Capture Input / Compare Output
G3
I/O
P8.3 CC19IO CAPCOM2: CC19 Capture Input / Compare Output
G2
I/O
P8.4 CC20IO CAPCOM2: CC20 Capture Input / Compare Output
H4
I/O
P8.5 CC21IO CAPCOM2: CC21 Capture Input / Compare Output
H3
I/O
P8.6 CC22IO CAPCOM2: CC22 Capture Input / Compare Output
H2
I/O
P8.7 CC23IO CAPCOM2: CC23 Capture Input / Compare Output
Doc ID 8673 Rev. 3
15/239
Ball data
ST10F280
Table 1.
Symbol
P7.0 – P7.7
XP10.0 –
XP10.15
16/239
Ball description (continued)
Ball
Type
number
Function
I/O
Port 7 is an 8-bit bidirectional I/O port. It is bit-wise programmable
for input or output via direction bits. For a pin configured as input,
the output driver is put into 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 also serve for alternate functions:
J4
O
P7.0 POUT0 PWM Channel 0 Output
J3
O
P7.1 POUT1 PWM Channel 1 Output
J2
O
P7.2 POUT2 PWM Channel 2 Output
J1
O
P7.3 POUT3 PWM Channel 3 Output
K2
I/O
P7.4 CC28IO CAPCOM2: CC28 Capture Input / Compare Output
K3
I/O
P7.5 CC29IO CAPCOM2: CC29 Capture Input / Compare Output
K4
I/O
P7.6 CC30IO CAPCOM2: CC30 Capture Input / Compare Output
L2
I/O
P7.7 CC31IO CAPCOM2: CC31 Capture Input / Compare Output
I
XPort 10 is a 16-bit input-only port with Schmitt-Trigger
characteristics.
The pins of XPort10 also serve as the analog input channels (up to
16) for the A/D converter, where XP10.X equals ANx (Analog input
channel x).
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
XP10.0
XP10.1
XP10.2
XP10.3
XP10.4
XP10.5
XP10.6
XP10.7
XP10.8
XP10.9
XP10.10
XP10.11
XP10.12
XP10.13
XP10.14
XP10.15
M4
M3
M2
M1
N4
N3
N2
N1
P4
P3
P2
P1
R2
R1
T1
U1
Doc ID 8673 Rev. 3
ST10F280
Ball data
Table 1.
Ball description (continued)
Symbol
P5.0 – P5.15
Ball
Type
number
Function
I
Port 5 is a 16-bit input-only port with Schmitt-Trigger
characteristics.
The pins of Port 5 also serve as the analog input channels (up to
16) for the A/D converter, where P5.x equals ANx (Analog input
channel x), or they serve as timer inputs:
T2
I
P5.0
R3
I
P5.1
T3
I
P5.2
R4
I
P5.3
T4
I
P5.4
U4
I
P5.5
P5
I
P5.6
R5
I
P5.7
T5
I
P5.8
U5
I
P5.9
P6
I
P5.10 T6EUD GPT2 Timer T6 External Up / Down Control Input
R6
I
P5.11 T5EUD GPT2 Timer T5 External Up / Down Control Input
T6
I
P5.12 T6IN GPT2 Timer T6 Count Input
U6
I
P5.13 T5IN GPT2 Timer T5 Count Input
P7
I
P5.14 T4EUD GPT1 Timer T4 External Up / Down Control Input
R7
I
P5.15 T2EUD GPT1 Timer T2 External Up / Down Control Input
Doc ID 8673 Rev. 3
17/239
Ball data
ST10F280
Table 1.
Ball description (continued)
Symbol
P2.0 – P2.15
18/239
Ball
Type
number
Function
I/O
Port 2 is a 16-bit bidirectional I/O port. It is bit-wise programmable
for input or output via direction bits. For a pin configured as input,
the output driver is put into 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 also serve for alternate functions:
T7
I/O
P2.0 CC0IO CAPCOM: CC0 Capture Input / Compare Output
P8
I/O
P2.1 CC1IO CAPCOM: CC1 Capture Input / Compare Output
R8
I/O
P2.2 CC2IO CAPCOM: CC2 Capture Input / Compare Output
T8
I/O
P2.3 CC3IO CAPCOM: CC3 Capture Input / Compare Output
T9
I/O
P2.4 CC4IO CAPCOM: CC4 Capture Input / Compare Output
P9
I/O
P2.5 CC5IO CAPCOM: CC5 Capture Input / Compare Output
R9
I/O
P2.6 CC6IO CAPCOM: CC6 Capture Input / Compare Output
U9
I/O
P2.7 CC7IO CAPCOM: CC7 Capture Input / Compare Output
T10
I/O
I
P2.8 CC8IO CAPCOM: CC8 Capture Input / Compare Output,
EX0IN Fast External Interrupt 0 Input
R10
I/O
I
P2.9 CC9IO CAPCOM: CC9 Capture Input / Compare Output,
EX1IN Fast External Interrupt 1 Input
P10
I/O
I
P2.10 CC10IO CAPCOM: CC10 Capture Input / Compare Output,
EX2IN Fast External Interrupt 2 Input
T11
I/O
I
P2.11 CC11IO CAPCOM: CC11 Capture Input / Compare Output,
EX3IN Fast External Interrupt 3 Input
R11
I/O
I
P2.12 CC12IO CAPCOM: CC12 Capture Input / Compare Output,
EX4IN Fast External Interrupt 4 Input
U12
I/O
I
P2.13 CC13IO CAPCOM: CC13 Capture Input / Compare Output,
EX5IN Fast External Interrupt 5 Input
P11
I/O
I
P2.14 CC14IO CAPCOM: CC14 Capture Input / Compare Output,
EX6IN Fast External Interrupt 6 Input
T12
I/O
I
I
P2.15 CC15IO CAPCOM: CC15 Capture Input / Compare Output,
EX7IN Fast External Interrupt 7 Input
T7IN CAPCOM2 Timer T7 Count Input
Doc ID 8673 Rev. 3
ST10F280
Ball data
Table 1.
Ball description (continued)
Symbol
Ball
Type
number
I/O
P3.0 - P3.13,
P3.15
Function
Port 3 is a 15-bit (P3.14 is missing) bidirectional I/O port. It is bitwise programmable for input or output via direction bits. For a pin
configured as input, the output driver is put into 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 also serve for alternate functions:
R12
I
P3.0 T0IN CAPCOM Timer T0 Count Input
T13
O
P3.1 T6OUT GPT2 Timer T6 Toggle Latch Output
P12
I
P3.2 CAPIN GPT2 Register CAPREL Capture Input
R13
O
P3.3 T3OUT GPT1 Timer T3 Toggle Latch Output
T14
I
P3.4 T3EUD GPT1 Timer T3 External Up / Down Control Input
P13
I
P3.5 T4IN GPT1 Timer T4 Input for Count / Gate / Reload / Capture
R14
I
P3.6 T3IN GPT1 Timer T3 Count / Gate Input
P14
I
P3.7 T2IN GPT1 Timer T2 Input for Count / Gate / Reload / Capture
R15
I/O
P3.8 MRST SSC Master-Receive / Slave-Transmit I/O
R16
I/O
P3.9 MTSR SSC Master-Transmit / Slave-Receive O/I
N14
I/O
P3.10 TxD0 ASC0 Clock / Data Output (Asynchronous /
Synchronous)
P15
O
P3.11 RxD0 ASC0 Data Input (Asynchronous) or I/O
(Synchronous)
P16
O
P3.12 BHE External Memory High Byte Enable Signal, WRH
External Memory High Byte Write Strobe
M14
I/O
P3.13 SCLK SSC Master Clock Output / Slave Clock Input
T17
O
P3.15 CLKOUT System Clock Output (= CPU Clock)
Doc ID 8673 Rev. 3
19/239
Ball data
ST10F280
Table 1.
Symbol
P4.0 – P4.7
RD
WR/WRL
Ball
Type
number
Function
I/O
Port 4 is an 8-bit bidirectional I/O port. It is bit-wise programmable
for input or output via direction bits. For a pin configured as input,
the output driver is put into high-impedance state. The input
threshold is selectable (TTL or special).
P4.6 & P4.7 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:
N16
O
P4.0 A16 Least Significant Segment Address Line
M15
O
P4.1 A17 Segment Address Line
L14
O
P4.2 A18 Segment Address Line
M16
O
P4.3 A19 Segment Address Line
L15
O
I
P4.4 A20 Segment Address Line
CAN2_RxD CAN2 Receive Data Input
L16
O
I
P4.5 A21 Segment Address Line
CAN1_RxD CAN1 Receive Data Input
K14
O
O
P4.6 A22 Segment Address Line, CAN_TxD
CAN1_TxD CAN1 Transmit Data Output
K15
O
O
P4.7 A23 Most Significant Segment Address Line
CAN2_TxD CAN2 Transmit Data Output
J14
O
External Memory Read Strobe. RD is activated for every external
instruction or data read access.
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 register SYSCON for
mode selection.
J15
READY/
READY
J16
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 memory cycle
time waitstates until the pin returns to the selected active level.
ALE
J17
O
Address Latch Enable Output. Can be used for latching the
address into external memory or an address latch in the
multiplexed bus modes.
I
External Access Enable pin. A low level at this pin during and after
Reset forces the ST10F280 to begin instruction execution out of
external memory. A high level forces execution out of the internal
Flash Memory.
EA
20/239
Ball description (continued)
H17
Doc ID 8673 Rev. 3
ST10F280
Ball data
Table 1.
Ball description (continued)
Symbol
PORT0:
P0L.0 - P0L.7,
P0H.0 - P0H.7
Ball
Type
number
Function
I/O
PORT0 consists of the two 8-bit bidirectional I/O ports P0L and
P0H. It is bit-wise programmable for input or output via direction
bits. For a pin configured as input, the output driver is put into highimpedance state.
In case of an external bus configuration, PORT0 serves as the
address (A) and address/data (AD) bus in multiplexed bus modes
and as the data (D) bus in demultiplexed bus modes.
Demultiplexed bus modes:
Data Path Width: 8-bit 16-bit
P0L.0 – P0L.7: D0 - D7 D0 - D7
P0H.0 – P0H.7: I/O D8 - D15
Multiplexed bus modes:
Data Path Width: 8-bit 16-bit
P0L.0 – P0L.7: AD0 - AD7 AD0 - AD7
P0H.0 – P0H.7: A8 - A15 AD8 - AD15
H16
I/O
P0L.0
H15
I/O
P0L.1
H14
I/O
P0L.2
G16
I/O
P0L.3
G15
I/O
P0L.4
G14
I/O
P0L.5
F16
I/O
P0L.6
E17
I/O
P0L.7
F15
I/O
P0H.0
E16
I/O
P0H.1
F14
I/O
P0H.2
D17
I/O
P0H.3
E15
I/O
P0H.4
D16
I/O
P0H.5
C17
I/O
P0H.6
E14
I/O
P0H.7
Doc ID 8673 Rev. 3
21/239
Ball data
ST10F280
Table 1.
Symbol
XPORT9.0 XPORT9.15
22/239
Ball description (continued)
Ball
Type
number
Function
I/O
XPort 9 is a 16-bit bidirectional I/O port. It is bit-wise programmable
for input or output via direction bits. For a pin configured as input,
the output driver is put into high-impedance state. XPort 9 outputs
can be configured as push/pull or open drain drivers.
D15
I/O
XPORT9.0
C16
I/O
XPORT9.1
D14
I/O
XPORT9.2
C15
I/O
XPORT9.3
B16
I/O
XPORT9.4
D13
I/O
XPORT9.5
C14
I/O
XPORT9.6
B15
I/O
XPORT9.7
A15
I/O
XPORT9.8
B14
I/O
XPORT9.9
C13
I/O
XPORT9.10
D12
I/O
XPORT9.11
B13
I/O
XPORT9.12
C12
I/O
XPORT9.13
D11
I/O
XPORT9.14
B12
I/O
XPORT9.15
Doc ID 8673 Rev. 3
ST10F280
Ball data
Table 1.
Ball description (continued)
Symbol
PORT1:
P1L.0 - P1L.7,
P1H.0 - P1H.7
XTAL1
XTAL2
RSTIN
RSTOUT
Ball
Type
number
Function
I/O
PORT1 consists of the two 8-bit bidirectional I/O ports P1L and
P1H. It is bit-wise programmable for input or output via direction
bits. For a pin configured as input, the output driver is put into highimpedance 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 also serve for alternate functions:
C11
I/O
P1L.0
B11
I/O
P1L.1
D10
I/O
P1L.2
C10
I/O
P1L.3
B10
I/O
P1L.4
A10
I/O
P1L.5
D9
I/O
P1L.6
C9
I/O
P1L.7
C8
I/O
P1H.0
D8
I/O
P1H.1
A7
I/O
P1H.2
B7
I/O
P1H.3
C7
I
P1H.4 CC24IO CAPCOM2: CC24 Capture Input
D7
I
P1H.5 CC25IO CAPCOM2: CC25 Capture Input
C5
I
P1H.6 CC26IO CAPCOM2: CC26 Capture Input
C6
I
P1H.7 CC27IO CAPCOM2: CC27 Capture Input
A5
I
XTAL1: Input to the oscillator amplifier and input to the internal
clock generator
O
XTAL2: Output of the oscillator amplifier circuit.
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.
I
Reset Input with Schmitt-Trigger characteristics. A low level at this
pin for a specified duration while the oscillator is running resets the
ST10F280. 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.
O
Internal Reset Indication Output. This pin is set to a low level when
the part is executing either a hardware, a software or a watchdog
timer reset. RSTOUT remains low until the EINIT (end of
initialization) instruction is executed.
A6
A3
B4
Doc ID 8673 Rev. 3
23/239
Ball data
ST10F280
Table 1.
Symbol
24/239
Ball description (continued)
Ball
Type
number
Function
NMI
C4
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 ST10F280 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.
XPWM.0
D4
O
XPWM Channel 0 Output
XPWM.1
C3
O
XPWM Channel 1 Output
XPWM.2
B2
O
XPWM Channel 2 Output
XPWM.3
C2
O
XPWM Channel 3 Output
XADCINJ
L3
O
Output trigger for ADC channel injection
VAREF
U2
-
Reference voltage for the A/D converter.
VAGND
U3
-
Reference ground for the A/D converter.
RPD
M17
I/O
Timing pin for the return from powerdown circuit and
synchronous/asynchronous reset selection.
DC1
G1
O
3.3V Decoupling pin: a decoupling capacitor of ~330 nF must be
connected between this pin and nearest VSS pin.
DC2
U11
O
3.3V Decoupling pin: a decoupling capacitor of ~330 nF must be
connected between this pin and VSS nearest pin.
VDD
A2
A9
A12
A14
E1
K1
U8
U15
P17
L17
G17
-
Digital Supply Voltage: + 5 V during normal operation, idle mode
and power down mode
Doc ID 8673 Rev. 3
ST10F280
Ball data
Table 1.
Symbol
VSS
Ball description (continued)
Ball
Type
number
A1
A4
A8
A11
A13
A16
A17
B3
B5
B6
B8
B9
B17
D5
D6
F1
F17
G4
H1
K16
K17
L1
L4
N15
N17
R17
T15
T16
U7
U10
U13
U14
U16
U17
-
Function
Digital ground.
Doc ID 8673 Rev. 3
25/239
Functional description
3
ST10F280
Functional description
The architecture of the ST10F280 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
ST10F280.
Block diagram
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26/239
Doc ID 8673 Rev. 3
ST10F280
4
Memory organization
Memory organization
The memory space of the ST10F280 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: 512K Bytes of on-chip single voltage 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. The register bank can consist of up
to 16 word-wide (R0 to R15) and/or byte-wide (RL0, RH0, …, RL7, RH7) general purpose
registers. Base address is 00’F600h, upper address is 00’FDFFh.
XRAM: 16K Bytes of on-chip extension RAM (single port XRAM) is provided as a storage
for data, user stack and code. The XRAM is a single bank, connected to the internal XBUS
and are accessed like an external memory in 16-bit demultiplexed bus-mode without
waitstate or read/write delay (50ns access at 40MHz CPU clock). Byte and word access is
allowed.
The XRAM address range is 00’8000h - 00’BFFFh if enabled (XPEN set bit 2 of SYSCON
register-, and XRAMEN set bit 2 of XPERCON register-). If bit XRAMEN or XPEN is
cleared, then any access in the address range 00’8000h 00’BFFFh 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 for the ST10F280’s system
stack or register banks. The XRAM is not provided for single bit storage and therefore is not
bit addressable.
SFR/ESFR: 1024 bytes (2 * 512 bytes) of address space is reserved for the special function
register areas. SFRs are word-wide registers which are used for controlling and monitoring
functions 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 bit 0 of the new
XPERCON register. Accesses to the CAN Module use demultiplexed addresses and a 16bit data bus (byte accesses are possible). Two waitstates give an access time of 100 ns at
40MHz CPU clock. No tristate waitstate is 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 bit 1 of the new
XPERCON register. Accesses to the CAN Module use demultiplexed addresses and a 16bit data bus (byte accesses are possible). Two waitstates give an access time of 100 ns at
40MHz CPU clock. No tristate waitstate is 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.
If one or the two CAN modules are used, Port 4 can not 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).
XPWM: Address range 00’EC00h 00’ECFFh is reserved for the XPWM Module access. The
XPWM is enabled by setting XPEN bit 2 of the SYSCON register and bit 4 of the new
XPERCON register. Accesses to the XPWM Module use demultiplexed addresses and a 16-
Doc ID 8673 Rev. 3
27/239
Memory organization
ST10F280
bit data bus (byte accesses are possible). Two waitstates give an access time of 100 ns at
40MHz CPU clock. No tristate waitstate is used.
XPORT9, XTIMER, XPORT10, XADCMUX: Address range 00’C000h 00’C3FFh is reserved
for the XPORT9, XPORT10, XTIMER and XADCMUX peripherals access. The XPORT9,
XTIMER, XPORT10, XADCMUX are enabled by setting XPEN bit 2 of the SYSCON register
and the bit 3 of the new XPERCON register. Accesses to the XPORT9, XTIMER, XPORT10
and XADCMUX modules use a 16-bit demultiplexed bus mode without waitstate or
read/write delay (50ns access at 40MHz CPU clock). Byte and word access is allowed.
4.1
Visibility of XBUS peripherals
The XBUS peripherals can be separately selected for being visible to the user by means of
corresponding selection bits in the XPERCON register. If not selected (not activated with
XPERCON bit) 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. SYSCON register is described in
Section 19.2: System configuration registers.
28/239
Doc ID 8673 Rev. 3
ST10F280
Memory organization
ST10F280 on-chip memory mapping
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Doc ID 8673 Rev. 3
29/239
Memory organization
ST10F280
XPERCON
15
14
13
12
11
10
9
8
7
6
5
-
-
-
-
-
-
-
-
-
-
-
4
R/W
Address:
0xF024h / 12h ESFR
Reset:
0x--05h
Type:
R/W
3
XPWMEN XPERCONEN3
R/W
2
1
0
XRAMEN
CAN2EN
CAN1EN
R/W
R/W
R/W
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’EF00h00’EFFFh is only directed to external memory if CAN2EN and XPWM bits are
cleared also.
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’EE00h00’EEFFh is only directed to external memory if CAN1EN and XPWM bits are
cleared also.
1: The on-chip CAN2 XPeripheral is enabled and can be accessed.
XRAMEN XRAM Enable Bit
0: Accesses to the on-chip 16K Byte XRAM are disabled, external access
performed.
1: The on-chip 16K Byte XRAM is enabled and can be accessed.
XPERCONEN3 XPORT9, XTIMER, XPORT10, XADCMUX Enable Bit
0: Accesses to the XPORT9, XTIMER, XPORT10, XADCMUX peripherals are
disabled, external access performed.
1: The on-chip XPORT9, XTIMER, XPORT10, XADCMUX peripherals are enabled
and can be accessed.
XPWMEN XPWM Enable Bit
0: Accesses to the on-chip XPWM 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 XPWM is enabled and can be accessed.
Note:
When both CAN and XPWM are disabled via XPERCON setting, then any access in the
address range 00’EC00h 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: XCAN1 is enabled, XCAN2 is disabled, XRAM is
enabled, XPORT9, XTIMER, XPORT10, XPWM, XADCMUX are disabled.
Register XPERCON cannot be changed after the global enabling of XPeripherals, i.e. after
setting of bit XPEN in SYSCON register.
30/239
Doc ID 8673 Rev. 3
ST10F280
Internal Flash memory
5
Internal Flash memory
5.1
Overview
●
512K 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 (50ns cycle time at fCPU = 40MHz)
●
Erase-Program Controller (EPC) similar to M29F400B STM’s stand-alone Flash
memory
●
●
–
Word-by-Word Programmable (16μs typical)
–
Data polling and Toggle Protocol for EPC Status
–
Internal Power-On detection circuit
Memory Erase in blocks
–
One 16K Byte, two 8K Byte, one 32K Byte, seven 64K Byte blocks
–
Each block can be erased separately (1.5 second typical)
–
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. Access to data of internal
Flash can only be performed with an inner protected program
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:
–
45mA max. Read current
–
60mA max. Program or Erase current
–
Automatic Stand-by-mode (50μA maximum)
●
100,000 Erase-Program Cycles per block, 20 year data retention time
●
Operating temperature: -40 to +125oC
5.2
Operational overview
5.2.1
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 40MHz. Instruction fetches and data operand
reads are performed with all addressing modes of the ST10F280 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.
Doc ID 8673 Rev. 3
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Internal Flash memory
Table 2.
5.2.2
ST10F280
512 Kbyte Flash memory block organization
Block
Addresses (segment 0)
Addresses (segment 1)
Size (Kbyte)
0
1
2
3
4
5
6
7
8
9
10
00’0000h to 00’3FFFh
00’4000h to 00’5FFFh
00’6000h to 00’7FFFh
01’8000h to 01’FFFFh
02’0000h to 02’FFFFh
03’0000h to 03’FFFFh
04’0000h to 04’FFFFh
05’0000h to 05’FFFFh
06’0000h to 06’FFFFh
07’0000h to 07’FFFFh
08’0000h to 08’FFFFh
01’0000h to 01’3FFFh
01’4000h to 01’5FFFh
01’6000h to 01’7FFFh
01’8000h to 01’FFFFh
02’0000h to 02’FFFFh
03’0000h to 03’FFFFh
04’0000h to 04’FFFFh
05’0000h to 05’FFFFh
06’0000h to 06’FFFFh
07’0000h to 07’FFFFh
08’0000h to 08’FFFFh
16
8
8
32
64
64
64
64
64
64
64
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
Note:
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.
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.
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Doc ID 8673 Rev. 3
ST10F280
5.2.3
Internal Flash memory
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.
5.2.4
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 cycles can then be performed to erase more than one block in parallel.
When a time-out period elaps (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.
5.2.5
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.
5.2.6
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.
5.2.7
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 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.
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Internal Flash memory
5.2.8
ST10F280
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 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
●
Protect / temporary unprotect 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 A18/A17/A16 define
the physical 64K Bytes 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:
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●
Status Register
●
Ready/Busy signal
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ST10F280
5.3.3
Internal Flash memory
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 Timeout 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 bit are reserved for future use and should be masked.
Flash Status
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
R
Address:
See note for address
Type:
R
6
5
FSB.7 FSB.6 FSB.5
R
R
4
-
3
2
FSB.3 FSB.2
R
1
0
-
-
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’.
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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.
5.3.4
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
-
-
-
-
BP10
BP9
BP8
BP7
BP6
BP5
BP4
BP3
BP2
BP1
BP0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Type:
R/W
BPx Block x Protection bit (x = 0...10)
‘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 temporarily disable
the Code Protection using the Code Temporary Unprotection instruction.
5.3.5
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 +
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Internal Flash memory
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 timeout is running; if FSB.3 is ‘1’, the timeout has expired and the EPC is
erasing the block(s).
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
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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 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 Clenable 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 10), 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.
Note:
The new value programmed in protection register will only become active after a reset.
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 CIProtection 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.
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.
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ST10F280
Internal Flash memory
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.
Table 3.
Instructions
Instruction
Read/Reset
Read/Reset
Program Word
Block Erase
Chip Erase
Erase Suspend
1st
Cycle
Mne Cycle
RD
RD
PW
BE
CE
ES
2nd
Cycle
3rd
Cycle
4th
Cycle
5th
Cycle
6th
Cycle
7th
Cycle
Addr.(1)
X(2)
Data
xxF0h
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
Data
xxA8h
xx54h
xx80h
xxA8h
Addr.(1)
X(2)
Data
xxB0h
1+
Read Memory Array until a new write cycle is initiated
3+
4
Read Memory Array until a new write
cycle is initiated
Read Data Polling or
Toggle Bit until Program
completes.
6
x2AA8h x1554h
6
1
xx54h
xx10h
Note
(6)
Read until Toggle stops, then read or program all data
needed from block(s) not being erased then Resume Erase.
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Internal Flash memory
Table 3.
ST10F280
Instructions (continued)
Instruction
Erase Resume
Set Block/Code
Protection
Read Protection
Status
Block
Temporary
Unprotection
ER
SP
RP
BTU
Code
Temporary
Unprotection
CTU
Code
Temporary
Protection
1st
Cycle
Mne Cycle
CTP
2nd
Cycle
3rd
Cycle
4th
Cycle
Addr.(1)
X(2)
Data
xx30h
Addr.(1)
x2A54h
x15A8h
x2A54h
Any odd
word
address(7)
Data
xxA8h
xx54h
xxC0h
WPR(8)
Addr.(1)
x2A54h
x15A8h
x2A54h
Data
xxA8h
xx54h
xx90h
Addr.(1)
x2A54h
x15A8h
x2A54h
X(2)
Data
xxA8h
xx54h
xxC1h
xxF0h
Addr.(1)
MEM(9)
Data
FFFFh
Addr.(1)
MEM(9)
Data
FFFBh
1
5th
Cycle
6th
Cycle
7th
Cycle
Read Data Polling or Toggle bit until Erase completes or
Erase is suspended another time.
4
4
Any odd
word
Read Protection Register
address(7) until a new write cycle is
initiated.
Read
PR
4
Write cycles must be executed from Flash.
1
Write cycles must be executed from Flash.
1
1. Address bit A14, A15 and above are don’t care for coded address inputs.
2. X = do not 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, timeout 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. Odd word address = 4n-2 where n = 0, 1, 2, 3..., ex. 0002h, 0006h...
8. 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’).
9. 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.
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●
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.
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5.3.6
Internal Flash memory
Reset processing and initial State
The Flash module distinguishes two kinds of CPU reset types
The lengthening of CPU reset:
5.4
●
Is not reported to external devices by bidirectional pin
●
Is not enabled in case of external start of CPU after reset.
Flash memory configuration
The default memory configuration of the ST10F280 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 08’FFFFh) remain unaffected.
The SGTDIS Segmentation Disable / Enable must also be set to 0 to allow the use of the full
512K 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)
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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, A17 and A18 are don’t care. This
simplify a lot the application software, because it minimize 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.
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 allows to
have a simpler and more 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
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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.
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Internal Flash memory
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
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...A18 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.
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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
;R12 contains the segment offset address to be
;programmed
;R13 contains the data to be programmed
EXTS R11, #1
MOV [R12], R13
;use EXTended addressing for next MOV instruction
;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
MOV R7, [R12]
;use EXTended addressing for next MOV instruction
;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
44/239
Doc ID 8673 Rev. 3
ST10F280
Internal Flash memory
;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:
....
....
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
Doc ID 8673 Rev. 3
45/239
Internal Flash memory
ST10F280
;Erasing Command
Erase_Polling:
EXTS R11, #1
MOV R7, [R12]
;use EXTended addressing for next MOV instruction
;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
;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 erasing operation finished succesfully,
;Flash is set back automatically to normal Read Mode
Erase_OK:
....
....
5.6
Bootstrap loader
The built-in bootstrap loader (BSL) of the ST10F280 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 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. ROM Memory
(internal or external) is not necessary, but it may be used to provide lookup tables or “corecode” 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.
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Doc ID 8673 Rev. 3
ST10F280
5.6.1
Internal Flash memory
Entering the bootstrap loader
The ST10F280 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 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 ST10F280 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. Identification byte is D5h for the
ST10F280.
Figure 5.
Bootstrap loader sequence
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Doc ID 8673 Rev. 3
47/239
Internal Flash memory
ST10F280
When the ST10F280 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 ST10F280 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 ST10F280’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
ST10F280 is in BSL mode (see Figure 7). All code fetches are made from the special BootROM, 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 ST10F280. 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).
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Doc ID 8673 Rev. 3
ST10F280
Internal Flash memory
Figure 6.
Hardware provisions to activate the BSL
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Figure 7.
Memory configuration after reset
Segment
16 MBytes
Access to:
255
16 MBytes
255
external
bus
disabled
2
1
2
1
0
16 MBytes
Access:
depends on
reset config
EA, Port0
2
1
IRAM
IRAM
0
Test
Flash
internal
Flash
Flash enabled
User
Test
Flash
internal
Flash
Flash enabled
User
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
Segment
255
external
bus
enabled
IRAM
BSL mode active
Access to:
Segment
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 ST10F280 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
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Internal Flash memory
ST10F280
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.
This process may go through several iterations or may directly execute the final application.
In all cases the ST10F280 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 ST10F280, 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
ST10F280 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 ST10F280 will start executing from location
00’0000h of the internal Flash or the external memory, as programmed via pin EA.
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 ST10F280 with a wide range of
Baud rates. However, the upper and lower limits have to be kept, in order to insure proper
data transfer.
f CPU
B ST10F280 = ----------------------------------------------32 × ( S0BRL + 1 )
The ST10F280 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:
T6 – 36
S0BRL = -------------------72
9
, T6 = --4
f
CPU
× ----------------B
Host
For a correct data transfer from the host to the ST10F280 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 ST10F280 Baud rate can
be calculated via the formula below:
F
B
B
–B
Contr
Host- × 100 %
= ------------------------------------------,
B
Contr
F B ≤ 2.5 %
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
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Doc ID 8673 Rev. 3
ST10F280
Internal Flash memory
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 ST10F280
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Doc ID 8673 Rev. 3
51/239
Central Processing Unit (CPU)
6
ST10F280
Central Processing Unit (CPU)
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 ST10F280’s instructions can be executed in one instruction cycle which requires
50ns at 40MHz 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.
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.
Figure 9.
CPU block diagram (MAC unit not included)
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Doc ID 8673 Rev. 3
ST10F280
Central Processing Unit (CPU)
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.
12
11
10
9
8
7
6
5
4
3
2
STKSZ
SGTDIS
ROMEN
BYTDIS
CLKEN
WRCFG
CSCFG
PWDCFG
OWDDIS
BDRSTEN
XPEN
VISIBLE
XPER-SHARE
15
ROMS1
SYSCON
14
13
R/W
R/W
R/W
R/W
R/W(1)
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W(1) R/W(1)
1
0
1. These bit are set directly or indirectly according to PORT0 and EA pin configuration during reset sequence.
Register SYSCON cannot be changed after execution of the EINIT instruction.
Address:
0xFF12h / 89h SFR
Reset:
0x0XX0h
Type:
R/W
1.
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.
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 (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 Slect lines: CSx change with rising edge of ALE
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Central Processing Unit (CPU)
6.1
ST10F280
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, multiplyaccumulate, 32-bit signed arithmetic operations.
A new transfer instruction CoMOV has also been added to take benefit of the new
addressing capabilities.
6.1.1
Features
Enhanced addressing capabilities
●
New addressing modes including a double indirect addressing mode with pointer postmodification.
●
Parallel Data Move: this mechanism allows one operand move during MultiplyAccumulate instructions without penalty.
●
New transfer instructions CoSTORE (for fast access to the MAC SFRs) and CoMOV
(for fast memory to memory table transfer).
Multiply-accumulate unit
●
One-cycle execution for all MAC operations.
●
16 x 16 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.
Program control
54/239
●
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.
Doc ID 8673 Rev. 3
ST10F280
Central Processing Unit (CPU)
Figure 10. MAC unit architecture
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6.2
Instruction set summary
The Table 4 lists the instructions of the ST10F280. 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
Doc ID 8673 Rev. 3
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Central Processing Unit (CPU)
Table 4.
ST10F280
Instruction set summary (continued)
Mnemonic
56/239
Description
Bytes
AND(B)
Bitwise AND, (word/byte operands)
2/4
OR(B)
Bitwise OR, (word/byte operands)
2/4
XOR(B)
Bitwise 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
Bitwise 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
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
Doc ID 8673 Rev. 3
ST10F280
Central Processing Unit (CPU)
Table 4.
Instruction set summary (continued)
Mnemonic
6.3
Description
Bytes
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
2
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 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.
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Central Processing Unit (CPU)
Table 5.
ST10F280
MAC coprocessor specific instructions
Mnemonic
Addressing modes
Repeatability
CoMUL
CoMULu
CoMULus
CoMULsu
CoMULCoMULuCoMULus-
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
CoMULsuCoMUL, 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
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Doc ID 8673 Rev. 3
ST10F280
Central Processing Unit (CPU)
Table 5.
MAC coprocessor specific instructions (continued)
Mnemonic
Addressing modes
Repeatability
CoNEG
CoNEG, rnd
-
No
Rwn, CoReg
No
[Rwn⊗], Coreg
Yes
[IDXi⊗], [Rwm⊗]
Yes
[IDXi⊗], [Rwm⊗]
Yes
Rwn, Rwm
[IDXi⊗], [Rwm⊗]
Rwn, [Rwm⊗]
No
Yes
Yes
CoRND
CoSTORE
CoMOV
CoMACM
CoMACMu
CoMACMus
CoMACMsu
CoMACMCoMACMuCoMACMusCoMACMsuCoMACM, rnd
CoMACMu, rnd
CoMACMus, rnd
CoMACMsu, rnd
CoMACMR
CoMACMRu
CoMACMRus
CoMACMRsu
CoMACMR, rnd
CoMACMRu, rnd
CoMACMRus, rnd
CoMACMRsu, rnd
CoADD
CoADD2
CoSUB
CoSUB2
CoSUBR
CoSUB2R
CoMAX
CoMIN
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Central Processing Unit (CPU)
Table 5.
ST10F280
MAC coprocessor specific instructions (continued)
Mnemonic
Addressing modes
Repeatability
CoLOAD
CoLOADCoLOAD2
CoLOAD2-
Rwn, Rwm
[IDXi⊗], [Rwm⊗]
Rwn, [Rwm⊗]
No
Rwm
#data4
[Rwm⊗]
Yes
No
Yes
Rwn, Rwm
[IDXi⊗], [Rwm⊗]
Rwn, [Rwm⊗]
No
No
No
No
No
CoCMP
CoSHL
CoSHR
CoASHR
CoASHR, rnd
CoABS
The Table 6 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 6.
Pointer post-modification combinations for IDXi and Rwn
Symbol
“[IDXi⊗]” stands for
“[Rwn⊗]” stands for
Table 7.
Address pointer operation
[IDXi]
(IDXi) ← (IDXi) (no-op)
[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 (k=0-15)
[Rwn+QRj]
(Rwn) ← (Rwn) + (QRj) (n=0-15;j =0,1)
[Rwn QRj]
(Rwn) ← (Rwn) (QRj) (n=0-15; j =0,1)
MAC registers referenced as ‘CoReg‘
Registers
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Mnemonic
Description
Address in Opcode
MSW
MAC-Unit Status Word
00000b
MAH
MAC-Unit Accumulator High
00001b
MAS
“limited” MAH /signed
00010b
Doc ID 8673 Rev. 3
ST10F280
Central Processing Unit (CPU)
Table 7.
MAC registers referenced as ‘CoReg‘ (continued)
Registers
Description
Address in Opcode
MAL
MAC-Unit Accumulator Low
00100b
MCW
MAC-Unit Control Word
00101b
MRW
MAC-Unit Repeat Word
00110b
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External bus controller
7
ST10F280
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 16-bit data, demultiplexed
●
16-/18-/20-/24-bit addresses 16-bit data, multiplexed
●
16-/18-/20-/24-bit addresses 8-bit data, multiplexed
●
16-/18-/20-/24-bit addresses 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.
For applications which require less external memory space, the address space can be
restricted to 1 MByte, 256 KByte or to 64 KByte. Port 4 outputs all 8 address lines if an
address space of 16 MBytes 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.
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Doc ID 8673 Rev. 3
ST10F280
7.1
External bus controller
Programmable chip select timing control
The ST10F280 allows the user to adjust the position of the CSx lines changes. By default
(after reset), the CSx lines are changing half a CPU clock cycle (12.5 ns at fCPU = 40MHz)
after the rising edge of ALE.
With the CSCFG bit set in the SYSCON register, the CSx lines are changing with the rising
edge of ALE, thus the CSx lines are changing at the same time the address lines are
changing. See Section 19.2: System configuration registers for detailed description of
SYSCON register.
Figure 11.
Chip select delay
3EGMENT0
.ORMAL$EMULTIPLEXED
!,%,ENGTHEN$EMULTIPLEXED
"US#YCLE
"US#YCLE
!DDRESS0
!,%
.ORMAL#3X
5NLATCHED#3X
$ATA
$ATA
"530
2$
$ATA
"530
$ATA
72
2EAD7RITE
2EAD7RITE
$ELAY
$ELAY
("1($'5
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,
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External bus controller
ST10F280
each bus cycle within this window must be terminated with the active level defined by this
RDYPOL bit in the associated BUSCON register.
9
8
CSREN0
RDYPOL0
RDYEN0
-
-
R/W
R/W
R/W
R/W
Address:
0xFF0Ch / 86h SFR
Reset:
0x0XX0h
Type:
R/W
R/W
R/W
5
4
BTYP
RWDC0
10
MCTC
R/W
R/W
R/W
R/W
5
4
RWDC1
11
MTTC0
12
MTTC1
13
ALECTL0
14
BUSACT0
15
CSWEN0
BUSCON0
7
6
3
2
1
0
1
0
15
14
13
12
11
10
9
8
CSWEN1
CSREN1
RDYPOL1
RDYEN1
-
BUSACT1
ALECTL1
BUSCON1
-
R/W R/W R/W R/W
7
BTYP
R/W R/W
Address:
0xFF14h / 8Ah SFR
Reset:
0x0000h
Type:
R/W
6
R/W
3
2
MCTC
R/W R/W
R/W
13
12
11
10
9
8
CSREN2
RDYPOL2
RDYEN2
-
BUSACT2
ALECTL2
-
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xFF16h / 8Bh SFR
Reset:
0x0000h
Type:
R/W
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Doc ID 8673 Rev. 3
5
4
BTYP
RWDC2
14
MTTC2
15
CSWEN2
BUSCON2
7
6
3
2
1
MCTC
R/W
R/W
R/W
R/W
0
ST10F280
External bus controller
9
8
CSREN3
RDYPOL3
RDYEN3
-
-
R/W
R/W
R/W
R/W
Address:
0xFF18h / 8Ch SFR
Reset:
0x0000h
Type:
R/W
R/W
R/W
5
4
BTYP
RWDC3
10
MCTC
R/W
R/W
R/W
R/W
5
4
BTYP
RWDC4
11
MTTC3
12
MTTC4
13
ALECTL3
14
BUSACT3
15
CSWEN3
BUSCON3
7
6
3
2
MCTC
R/W
R/W
R/W
R/W
1
0
1
0
15
14
13
12
11
10
9
8
CSWEN4
CSREN4
RDYPOL4
RDYEN4
-
BUSACT4
ALECTL4
BUSCON4
-
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xFF1Ah / 8Dh SFR
Reset:
0x0000h
Type:
R/W
7
6
3
2
RDYPOLx Ready Active Level Control
0: The active level on the READY pin is low, bus cycle terminates with a ‘0’ on READY pin,
1: The active level on the READY pin is high, bus cycle terminates with a ‘1’ on READY
pin.
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Interrupt system
8
ST10F280
Interrupt system
The interrupt response time for internal program execution is from 125ns to 300ns at 40MHz
CPU clock.
The ST10F280 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 ST10F280 has 8 PEC channels,
each of them offers such fast interrupt-driven data transfer capabilities.
An interrupt control register which contains an interrupt request flag, an interrupt enable flag
and an interrupt priority bitfield 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.
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ST10F280
8.1
Interrupt system
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.
EXISEL
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
EXI7SS
EXI6SS
EXI5SS
EXI4SS
EXI3SS
EXI2SS
EXI1SS
EXI0SS
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xF1DAh / EDh ESFR
Reset:
0x0000h
Type:
R/W
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...7
P2.10...15
Not used (zero)
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Interrupt system
ST10F280
EXICON
E
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
EXI7ES
EXI6ES
EXI5ES
EXI4ES
EXI3ES
EXI2ES
EXI1ES
EXI0ES
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xF1C0h / E0h ESFR
Reset:
0x0000h
Type:
R/W
EXIxES(x=7...0) External Interrupt x Edge Selection Field (x=7...0)
00: Fast external interrupts disabled: standard mode
EXxIN pin not taken in account for entering/exiting Power Down mode.
01: Interrupt on positive edge (rising)
Enter Power Down mode if EXiIN = ‘0’, exit if EXxIN = ‘1’ (referred as ‘high’ active
level)
10: Interrupt on negative edge (falling)
Enter Power Down mode if EXiIN = ‘1’, exit if EXxIN = ‘0’ (referred as ‘low’ active
level)
11: Interrupt on any edge (rising or falling)
Always enter Power Down mode, exit if EXxIN level changed.
8.2
Interrupt registers and vectors location list
Table 8 shows all the available ST10F280 interrupt sources and the corresponding
hardware-related interrupt flags, vectors, vector locations and trap (interrupt) numbers:
Table 8.
Interrupt sources
Source of Interrupt or
PEC service request
68/239
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
Doc ID 8673 Rev. 3
ST10F280
Interrupt system
Table 8.
Interrupt sources (continued)
Source of Interrupt or
PEC service request
Request
flag
Enable
flag
Interrupt
vector
Vector
location
Trap
number
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
CAPCOM Timer 0
T0IR
T0IE
T0INT
00’0080h
20h
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
S0TBIR
S0TBIE
S0TBINT
00’011Ch
47h
ASC0 Transmit Buffer
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Interrupt system
Table 8.
ST10F280
Interrupt sources (continued)
Source of Interrupt or
PEC service request
Request
flag
Enable
flag
Interrupt
vector
Vector
location
Trap
number
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
CAPCOM Timer 0
T0IR
T0IE
T0INT
00’0080h
20h
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
S0TBIR
S0TBIE
S0TBINT
00’011Ch
47h
ASC0 Transmit Buffer
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Doc ID 8673 Rev. 3
ST10F280
Interrupt system
Table 8.
Interrupt sources (continued)
Source of Interrupt or
PEC service request
Request
flag
Enable
flag
Interrupt
vector
Vector
location
Trap
number
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
CAPCOM Timer 0
T0IR
T0IE
T0INT
00’0080h
20h
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
S0TBIR
S0TBIE
S0TBINT
00’011Ch
47h
ASC0 Transmit Buffer
Doc ID 8673 Rev. 3
71/239
Interrupt system
Table 8.
ST10F280
Interrupt sources (continued)
Source of Interrupt or
PEC service request
Request
flag
Enable
flag
Interrupt
vector
Vector
location
Trap
number
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
XPWM
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.
8.3
Interrupt Control Registers
All interrupt control registers are identically organized. The lower 8 bit of an interrupt control
register contain the complete interrupt status information of the associated source, which is
required during one round of prioritization, the upper 8 bit of the respective register are
reserved. All interrupt control registers are bit-addressable and all bit 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 bit (15...8) will return zeros, when read, and will discard written data.
The layout of the Interrupt Control registers shown below applies to each xxIC register,
where xx stands for the mnemonic for the respective source.
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Doc ID 8673 Rev. 3
ST10F280
Interrupt system
xxIC
15
14
13
12
11
10
9
8
7
6
-
-
-
-
-
-
-
-
xxIR
xxIE
ILVL
GLVL
R/W
R/W
R/W
R/W
Address:
0xyyyyh / zzh SFR area
Reset:
0x--00h
Type:
R/W
5
4
3
2
1
0
GLVL Group Level
Defines the internal order for simultaneous requests of the same priority.
11: Highest group priority
00: 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 9 shows all of the possible exceptions or error conditions that can arise during runtime:
Doc ID 8673 Rev. 3
73/239
Interrupt system
Table 9.
ST10F280
Exceptions or error conditions that can arise during run-time
Exception condition
Trap flag
Trap vector
Vector location
Trap number
Reset Functions
Trap priority(1)
MAXIMUM
Hardware Reset
RESET
00’0000h
00h
III
Software Reset
RESET
00’0000h
00h
III
Watchdog Timer Overflow
RESET
00’0000h
00h
III
NMI
NMITRAP
00’0008h
02h
II
Stack Overflow
STKOF
STOTRAP
00’0010h
04h
II
Stack Underflow
STKUF
STUTRAP
00’0018h
06h
II
UNDOPC
BTRAP
00’0028h
0Ah
I
Protected Instruction Fault
PRTFLT
BTRAP
00’0028h
0Ah
I
Illegal Word Operand Access
ILLOPA
BTRAP
00’0028h
0Ah
I
Illegal Instruction Access
ILLINA
BTRAP
00’0028h
0Ah
I
Illegal External Bus Access
ILLBUS
BTRAP
00’0028h
0Ah
I
MACTRP
BTRAP
00’0028h
0Ah
I
Class A Hardware Traps
Non-Maskable Interrupt
Class B Hardware Traps
Undefined Opcode
MAC Trap
MINIMUM
Reserved
Software Traps TRAP
Instruction
[2Ch –3Ch]
[0Bh – 0Fh]
Any [00’0000h–
00’01FCh]
in steps of 4h
Any [00h – 7Fh]
Current CPU
Priority
1. 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
74/239
Doc ID 8673 Rev. 3
ST10F280
9
Capture/Compare (CAPCOM) units
Capture/Compare (CAPCOM) units
The ST10F280 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 200ns at 40MHz 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 Figure 13 and Figure 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
2ELOAD2EGISTER4X2%,
#05
#LOCK
X
NN
4X).
0IN
)NTERRUPT
2EQUEST
4X
)NPUT
#ONTROL
#!0#/-4IMER4X
-ODE
#ONTROL
#APTURE
OR
#OMPARE
3IXTEENBIT
#APTURE#OMPARE
2EGISTERS
4Y
)NPUT
#ONTROL
#!0#/-4IMER4Y
'044IMER4
/VER5NDERFLOW
0IN
#APTUREINPUTS
#OMPAREOUTPUTS
#APTURE#OMPARE
)NTERRUPT2EQUESTS
0IN
#05
#LOCK
NN
)NTERRUPT
2EQUEST
'044IMER4
/VER5NDERFLOW
2ELOAD2EGISTER4Y2%,
Y
("1($'5
Doc ID 8673 Rev. 3
75/239
Capture/Compare (CAPCOM) units
Note:
ST10F280
The CAPCOM2 unit provides 16 capture inputs, but only 12 compare outputs. CC24I to
CC27I are inputs only.
Figure 13. Block diagram of CAPCOM timers T0 and T7
2ELOAD2EGISTER4X2%,
4XL
)NPUT
#ONTROL
#05
#LOCK
8
'044IMER4
/VER5NDERFLOW
-58
#!0#/-4IMER4X
4X)2
)NTERRUPT
2EQUEST
%DGE3ELECT
4X2
4XL 4X-
4X). 0IN
X
4XL
("1($'5
Figure 14. Block diagram of CAPCOM timers T1 and T
2ELOAD2EGISTER4X2%,
4XL
#05
#LOCK
8
'044IMER4
/VER5NDERFLOW
-58
#!0#/-4IMER4X
4X-
4X2
4X)2
)NTERRUPT
2EQUEST
X
("1($'5
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 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 ).
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Doc ID 8673 Rev. 3
ST10F280
Capture/Compare (CAPCOM) units
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 40MHz CPU clock are listed in the Table 11.
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.
Table 10.
Compare modes
Compare modes
Table 11.
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.
CAPCOM timer input frequencies, resolution and periods
Timer input selection TxI
fCPU = 40MHz
Pre-scaler for fCPU
000b
001b
010b
011b
100b
101b
110b
111b
8
16
32
64
128
256
512
1024
Input Frequency
5MHz
2.5MHz 1.25MHz
625kHz
Resolution
200ns
400ns
0.8µs
1.6µs
3.2µs
6.4µs
12.8µs
25.6µs
Period
13.1ms
26.2ms
52.4ms
104.8ms
209.7ms
419.4ms
838.9ms
1.678s
Doc ID 8673 Rev. 3
312.5kHz 156.25kHz 78.125kHz 39.1kHz
77/239
General purpose timer unit
10
ST10F280
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 12 lists the timer input frequencies, resolution and periods for each pre-scaler option
at 40MHz 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.
78/239
Doc ID 8673 Rev. 3
ST10F280
Table 12.
General purpose timer unit
GPT1 timer input frequencies, resolution and periods
Timer input selection T2I / T3I / T4I
fCPU = 40MHz
000b
001b
010b
011b
100b
101b
110b
111b
8
16
32
64
128
256
512
1024
Input Freq
5MHz
2.5MHz
1.25MHz
625kHz
312.5kHz
Resolution
200ns
400ns
0.8µs
1.6µs
3.2µs
6.4µs
12.8µs
25.6µs
Period maximum
13.1ms
26.2ms
52.4ms
104.8ms
209.7ms
419.4ms
838.9ms
1.678s
Pre-scaler factor
156.25kHz 78.125kHz
39.1kHz
Figure 15. Block diagram of GPT1
4%5$
#05#LOCK
5$
NN
4).
4
-ODE
CONTROL
)NTERRUPT
2EQUEST
'044IMER4
#LEAR
#APTURE
)NTERRUPT
2EQUEST
#!0).
'04#!02%,
2ELOAD
4).
#05#LOCK
NN
4
-ODE
CONTROL
)NTERRUPT
2EQUEST
4OGGLE&&
'044IMER4
5$
4%5$
44,
4/54
TO#!0#/4IMERS
("1($'5
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.
Doc ID 8673 Rev. 3
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General purpose timer unit
ST10F280
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 13 lists the timer input frequencies, resolution and periods for each pre-scaler option
at 40MHz 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 13.
GPT2 timer input frequencies, resolution and period
Timer input selection T5I / T6I
fCPU = 40MHz
000b
001b
010b
011b
100b
101b
110b
111b
4
8
16
32
64
128
256
512
Input Freq
10MHz
5MHz
2.5MHz
1.25MHz
625kHz
Resolution
100ns
200ns
400ns
0.8µs
1.6µs
3.2µs
6.4µs
12.8µs
Period maximum
6.55ms
13.1ms
26.2ms
52.4ms
104.8ms
209.7ms
419.4ms
838.9ms
Pre-scaler factor
312.5kHz 156.25kHz 78.125kHz
Figure 16. Block diagram of GPT2
4%5$
#05#LOCK
5$
NN
4).
4
-ODE
CONTROL
)NTERRUPT
2EQUEST
'044IMER4
#LEAR
#APTURE
)NTERRUPT
2EQUEST
#!0).
'04#!02%,
2ELOAD
4).
#05#LOCK
NN
4
-ODE
CONTROL
)NTERRUPT
2EQUEST
4OGGLE&&
'044IMER4
5$
4%5$
44,
4/54
TO#!0#/4IMERS
("1($'5
80/239
Doc ID 8673 Rev. 3
ST10F280
PWM module
11
PWM module
11.1
Standard PWM module
The pulse width modulation module can generate up to four PWM output signals using
edge-aligned or centre-aligned PWM. In addition, the PWM module can generate PWM
burst signals and single shot outputs. The Table 14 shows the PWM frequencies for different
resolutions.
The level of the output signals is selectable and the PWM module can generate interrupt
requests.
Figure 17. Block diagram of PWM module
00X0ERIOD2EGISTER
#OMPARATOR
#LOCK
)NPUT
#ONTROL
#LOCK
-ATCH
04X
BIT5P$OWN#OUNTER
2UN
#OMPARATOR
5P$OWN
#LEAR#ONTROL
-ATCH
0/54X
/UTPUT#ONTROL
%NABLE
3HADOW2EGISTER
5SERREADABLEWRITEABLEREGISTER
7RITE#ONTROL
07X0ULSE7IDTH2EGISTER ("1($'5
Table 14.
11.2
PWM unit frequencies and resolution at 40MHz CPU clock
Mode 0
Resolution
8-bit
10-bit
12-bit
14-bit
16-bit
CPU Clock/1
25ns
156.25kHz
39.06kHz
9.77kHz
2.44Hz
610.35Hz
CPU Clock/64
1.6μs
2.44Hz
610.35Hz
152.58Hz
38.15Hz
9.54Hz
Mode 1
Resolution
8-bit
10-bit
12-bit
14-bit
16-bit
CPU Clock/1
25ns
78.12kHz
19.53kHz
4.88kHz
1.22kHz
305.17Hz
CPU Clock/64
1.6μs
1.22kHz
305.17Hz
76.29Hz
19.07Hz
4.77Hz
New PWM module: XPWM
The new Pulse Width Modulation (XPWM) Module of the ST10F280 is mapped on the
XBUS interface (Address range 00’EC00h-00’ECFFh) and allows the generation of up to 4
independent PWM signals.The XPWM is enabled by setting XPEN bit 2 of the SYSCON
register and bit 4 of the new XPERCON register. The frequency range of these XPWM
signals for a 40MHz CPU clock is from 9.6Hz up to 20MHz for edge aligned signals. For
center aligned signals the frequency range is 4.8Hz up to 10MHz (see detailed description).
The minimum values depend on the width (16 bit) and the resolution (CLK/1 or CLK/64) of
Doc ID 8673 Rev. 3
81/239
PWM module
ST10F280
the XPWM timers. The maximum values assume that the XPWM output signal changes with
every cycle of the respective timer. In a real application the maximum XPWM frequency will
depend on the required resolution of the XPWM output signal (see Figure 18).
The Pulse Width Modulation Module consists of 4 independent PWM channels. Each
channel has a 16-bit up/down counter XPTx, a 16-bit period register XPPx with a shadow
latch, a 16-bit pulse width register XPWx with a shadow latch, two comparators, and the
necessary control logic. The operation of all four channels is controlled by two common
control registers, XPWMCON0 and XPWMCON1, and the interrupt control and status is
handled by one interrupt control register XP2IC, which is also common for all channels (see
Figure 11.2.1).
Figure 18. SFRs and port pins associated with the XPWM module
$ATA2EGISTERS
#OUNTER2EGISTERS
800
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
807
9 9 9 9 9 9 9 9 9999999
9
800
9 9 9 9 9 9 9 9 9999999
9
807
9 9 9 9 9 9 9 9 9999999
9
800
9 9 9 9 9 9 9 9 9999999
9
807
9 9 9 9 9 9 9 9 9999999
9
800
9 9 9 9 9 9 9 9 9999999
9
807
9 9 9 9 9 9 9 9 9999999
9
/UTPUTONDEDICATEDPINS
807-
807-
807-
807-
#ONTROL2EGISTERSAND)NTERRUPT#ONTROL
804
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
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9 9 9 9 9 9 9999999
9 9 9
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9 9 9 9 9 9 9999999
9 9 9
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9 9 9
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("1($'5
82/239
Doc ID 8673 Rev. 3
9
4HISBITHASA807-FUNCTION
4HISBITHASNO807(FUNCTIONORISNOTIMPLEMNENTED
4HISREGISTERBELONGSTO%3&2AREA
9
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Figure 19. XPWM channel block diagram
#OMPARATOR
9
ST10F280
11.2.1
PWM module
Operating modes
The XPWM module provides four different operating modes:
Note:
●
Mode 0 Standard PWM generation (edge aligned PWM) available on all four channels
●
Mode 1 Symmetrical PWM generation (center aligned PWM) available on all four
channels
●
Burst mode combines channels 0 and 1
●
Single shot mode available on channels 2 and 3
The output signals of the XPWM module are XORed with the outputs of the respective bits
of XPOLAR register. After reset these bits are cleared, so the PWM signals are directly
driven to the output pins. By setting the respective bits of XPOLAR register to ‘1’ the PWM
signal may be inverted (XORed with ‘1’) before being driven to the output pin. The
descriptions below refer to the standard case after reset, i.e. direct driving.
Mode 0: standard PWM generation (edge aligned PWM)
Mode 0 is selected by clearing the respective bit XPMx in register XPWMCON1 to ‘0’. In this
mode the timer XPTx of the respective XPWM channel is always counting up until it reaches
the value in the associated period shadow register. Upon the next count pulse the timer is
reset to 0000h and continues counting up with subsequent count pulses. The XPWM output
signal is switched to high level when the timer contents are equal to or greater than the
contents of the pulse width shadow register. The signal is switched back to low level when
the respective timer is reset to 0000h, i.e. below the pulse width shadow register. The period
of the resulting PWM signal is determined by the value of the respective XPPx shadow
register plus 1, counted in units of the timer resolution.
PWM_PeriodMode0 = [XPPx] + 1
The duty cycle of the XPWM output signal is controlled by the value in the respective pulse
width shadow register. This mechanism allows the selection of duty cycles from 0% to 100%
including the boundaries. For a value of 0000h the output will remain at a high level,
representing a duty cycle of 100%. For a value higher than the value in the period register
the output will remain at a low level, which corresponds to a duty cycle of 0%.
The Figure 20 illustrates the operation and output waveforms of a XPWM channel in mode 0
for different values in the pulse width register.
This mode is referred to as Edge Aligned PWM, because the value in the pulse width
(shadow) register only effects the positive edge of the output signal. The negative edge is
always fixed and related to the clearing of the timer.
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PWM module
ST10F280
Figure 20. Operation and output waveform in mode 0
800X
0ERIOD
804X#OUNT
6ALUE
807X0ULSE
7IDTH
$UTY#YCLE
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807X
807X
807X
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Mode 1: symmetrical PWM generation (center aligned PWM)
Mode 1 is selected by setting the respective bit XPMx in register XPWMCON1 to ‘1’. In this
mode the timer XPTx of the respective XPWM channel is counting up until it reaches the
value in the associated period shadow register.
Upon the next count pulse the count direction is reversed and the timer starts counting down
now with subsequent count pulses until it reaches the value 0000H. Upon the next count
pulse the count direction is reversed again and the count cycle is repeated with the following
count pulses.
The XPWM output signal is switched to a high level when the timer contents are equal to or
greater than the contents of the pulse width shadow register while the timer is counting up.
The signal is switched back to a low level when the respective timer has counted down to a
value below the contents of the pulse width shadow register. So in mode 1 this PWM value
controls both edges of the output signal.
Note that in mode 1 the period of the PWM signal is twice the period of the timer:
PWM_PeriodMode1 = 2 * ([XPPx] + 1)
The figure below illustrates the operation and output waveforms of a XPWM channel in
mode 1 for different values in the pulse width register.
This mode is referred to as Center Aligned PWM, because the value in the pulse width
(shadow) register effects both edges of the output signal symmetrically.
84/239
Doc ID 8673 Rev. 3
ST10F280
PWM module
Figure 21. Operation and output waveform in mode 1
800X
0ERIOD
804X#OUNT
6ALUE
807X0ULSE
7IDTH
$UTY#YCLE
807X
807X
807X
807X
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Burst mode
Burst mode is selected by setting bit PB01 in register XPWMCON1 to ‘1’. This mode
combines the signals from XPWM channels 0 and 1 onto the port pin of channel 0. The
output of channel 0 is replaced with the logical AND of channels 0 and 1. The output of
channel 1 can still be used at its associated output pin (if enabled).
Each of the two channels can either operate in mode 0 or 1.
Note:
It is guaranteed by design, that no spurious spikes will occur at the output pin of channel 0 in
this mode. The output of the AND gate will be transferred to the output pin synchronously to
internal clocks.
XORing of the PWM signal and the port output latch value is done after the ANDing of
channel 0 and 1.
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PWM module
ST10F280
Figure 22. Operation and output waveform in burst mode
800
0ERIOD
6ALUE
804
#OUNT
6ALUE
#HANNEL
800
804
#HANNEL
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80/54
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Single shot mode
Single shot mode is selected by setting the respective bit PSx in register XPWMCON1 to ‘1’.
This mode is available for XPWM channels 2 and 3.
In this mode the timer XPTx of the respective XPWM channel is started via software and is
counting up until it reaches the value in the associated period shadow register. Upon the
next count pulse the timer is cleared to 0000h and stopped via hardware, i.e. the respective
PTRx bit is cleared. The XPWM output signal is switched to high level when the timer
contents are equal to or greater than the contents of the pulse width shadow register. The
signal is switched back to low level when the respective timer is cleared, i.e. is below the
pulse width shadow register. Thus starting a XPWM timer in single shot mode produces one
single pulse on the respective port pin, provided that the pulse width value is between 0000h
and the period value. In order to generate a further pulse, the timer has to be started again
via software by setting bit PTRx (see Figure 23).
After starting the timer (i.e. PTRx = ‘1’) the output pulse may be modified via software.
Writing to timer XPTx changes the positive and/or negative edge of the output signal,
depending on whether the pulse has already started (i.e. the output is high) or not (i.e. the
output is still low). This (multiple) re-triggering is always possible while the timer is running,
i.e. after the pulse has started and before the timer is stopped.
Loading counter XPTx directly with the value in the respective XPPx shadow register will
abort the current PWM pulse upon the next clock pulse (counter is cleared and stopped by
hardware).
By setting the period (XPPx), the timer start value (XPTx) and the pulse width value (XPWx)
appropriately, the pulse width (tw) and the optional pulse delay (td) may be varied in a wide
range.
86/239
Doc ID 8673 Rev. 3
ST10F280
PWM module
Figure 23. Operation and output waveform in single shot mode
800X
0ERIOD
804X#OUNT
6ALUE
807X0ULSE
7IDTH
,32
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11.2.2
XPWM module registers
The XPWM module is controlled via two sets of registers. The waveforms are selected by
the channel specific registers XPTx (timer), XPPx (period) and XPWx (pulse width).
Three common registers control the operating modes and the general functions
(XPWMCON0 and XPWMCON1) of the PWM module as well as the interrupt behavior
(XP2IC).
Up/down counters XPTx
Each counter XPTx of a PWM channel is clocked either directly by the CPU clock or by the
CPU clock divided by 64. Bit PTIx in register XPWMCON0 selects the respective clock
source. A XPWM counter counts up or down (controlled by hardware), while its respective
run control bit PTRx is set. A timer is started (PTRx = ’1’) via software and is stopped (PTRx
= ’0’) either via hardware or software, depending on its operating mode. Control bit PTRx
enables or disables the clock input of counter XPTx rather than controlling the XPWM output
signal.
Note:
For the register locations please refer to the Table 15.
Table 16 summarizes the XPWM frequencies that result from various combinations of
operating mode, counter resolution (input clock) and pulse width resolution.
Period registers XPPx
The 16-bit period register XPPx of a XPWM channel determines the period of a PWM cycle,
i.e. the frequency of the PWM signal. This register is buffered with a shadow register. The
shadow register is loaded from the respective XPPx register at the beginning of every new
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PWM module
ST10F280
PWM cycle, or upon a write access to XPPx, while the timer is stopped. The CPU accesses
the XPPx register while the hardware compares the contents of the shadow register with the
contents of the associated counter XPTx. When a match is found between counter and
XPPx shadow register, the counter is either reset to 0000h, or the count direction is switched
from counting up to counting down, depending on the selected operating mode of that
XPWM channel. For the register locations refer to the Table 15.
Pulse width registers XPWx
This 16-bit register holds the actual PWM pulse width value which corresponds to the duty
cycle of the PWM signal. This register is buffered with a shadow register. The CPU
accesses the XPWx register while the hardware compares the contents of the shadow
register with the contents of the associated counter XPTx. The shadow register is loaded
from the respective XPWx register at the beginning of every new PWM cycle, or upon a
write access to XPWx, while the timer is stopped.When the counter value is greater than or
equal to the shadow register value, the PWM signal is set, otherwise it is reset. The output
of the comparators may be described by the boolean formula:
PWM output signal = [XPTx] ≥ [XPWx shadow latch].
This type of comparison allows a flexible control of the PWM signal. For the register
locations refer to the Table 15.
Table 15.
XPWM module channel specific register addresses
Register
Address
Register
Address
XPW0
EC30h
XPT0
EC10h
XPW1
EC32h
XPT1
EC12h
XPW2
EC34h
XPT2
EC14h
XPW3
EC36h
XPT3
EC16h
XPP0
EC20h
XPP1
EC22h
XPP2
EC24h
XPP3
EC26h
These registers are not bit-addressable.
Table 16.
88/239
XPWM frequency
Mode 0
Resolution
8-bit
10-bit
12-bit
14-bit
16-bit
CPU Clock/1
25ns
156.25kHz
39.06kHz
9.77kHz
2.44Hz
610.35Hz
CPU Clock/64
1.6μs
2.44Hz
610.35Hz
152.58Hz
38.15Hz
9.54Hz
Mode 1
Resolution
8-bit
10-bit
12-bit
14-bit
16-bit
CPU Clock/1
25ns
78.12kHz
19.53kHz
4.88kHz
1.22kHz
305.17Hz
CPU Clock/64
1.6μs
1.22kHz
305.17Hz
76.29Hz
19.07Hz
4.77Hz
Doc ID 8673 Rev. 3
ST10F280
11.2.3
PWM module
XPWM Control Registers
XPWMCON0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
PIR3
PIR2
PIR1
PIR0
PIE3
PIE2
PIE1
PIE0
PTI3
PTI2
PTI1
PTI0
PTR3
PTR2
PTR1
PTR0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xEC00h
Reset:
0x0000h
Type:
R/W
PTRx XPWM Timer x Run Control Bit
0: Timer XPTx is disconnected from its input clock
1: Timer XPTx is running
PTIx XPWM Timer x Input Clock Selection
0: Timer XPTx clocked with CLKCPU
1: TimerX PTx clocked with CLKCPU / 64
PIEx XPWM Channel x Interrupt Enable Flag
0: Interrupt from channel x disabled
1: Interrupt from channel x enabled
PIRx XPWM Channel x Interrupt Request Flag
0: No interrupt request from channel x
1: Channel x interrupt pending (must be reset via software)
Register XPWMCON0 controls the function of the timers of the four XPWM channels and
the channel specific interrupts. Having the control bits organized in functional groups allows
e.g. to start or stop all 4 XPWM timers simultaneously with one bitfield instruction. Note:
This register is not bit-addressable.
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PWM module
ST10F280
XPWMCON1
15
14
13
12
11
10
9
8
7
6
5
4
PS3
PS2
-
PB01
-
-
-
-
PM3
PM2
PM1
PM0
R/W
R/W
-
R/W
-
-
-
-
R/W
R/W
R/W
R/W
Address:
0xEC02h
Reset:
0x0000h
Type:
R/W
3
2
PEN3 PEN2
R/W
R/W
1
0
PEN1 PEN0
R/W
R/W
PENx XPWM Channel x Output Enable Bit
0: Channel x output signal disabled, generate interrupt only
1: Channel x output signal enabled
PMx XPWM Channel x Mode Control Bit
0: Channel x operates in mode 0, edge aligned PWM
1: Channel x operates in mode 1, center aligned PWM
PB01 XPWM Channel 0/1 Burst Mode Control Bit
0: Channels 0 and 1 work independently in respective standard mode
1: Outputs of channels 0 and 1 are ANDed to XPWM0 in burst mode
PSx XPWM Channel x Single Shot Mode Control Bit
0: Channel x works in respective standard mode
1: Channel x operates in single shot mode
Register XPWMCON1 controls the operating modes and the outputs of the four XPWM
channels. The basic operating mode for each channel (standard = edge aligned, or
symmetrical = center aligned PWM mode) is selected by the mode bits XPMx. Burst mode
(channels 0 and 1) and single shot mode (channel 2 or 3) are selected by separate control
bits. The output signal of each XPWM channel is individually enabled by bit PENx. If the
output is not enabled the respective pin can only be used to generate an interrupt request.
Note: This register is not bit-addressable.
11.2.4
Interrupt request generation
Each of the four channels of the XPWM module can generate an individual interrupt
request. Each of these “channel interrupts” can activate the common “module interrupt”,
which actually interrupts the CPU. This common module interrupt is controlled by the XPWM
Module Interrupt Control register XP2IC(Xperipherals 2 control register). The interrupt
service routine can determine the active channel interrupt(s) from the channel specific
interrupt request flags PIRx in register XPWMCON0. The interrupt request flag PIRx of a
channel is set at the beginning of a new PWM cycle, i.e. upon loading the shadow registers.
This indicates that registers XPPx and XPWx are now ready to receive a new value. If a
channel interrupt is enabled via its respective PIEx bit, also the common interrupt request
flag XP2IR in register XP2IC is set, provided that it is enabled via the common interrupt
enable bit XP2IE.
Note:
90/239
The channel interrupt request flags (PIRx in register XPWMCON0) are not automatically
cleared by hardware upon entry into the interrupt service routine, so they must be cleared
via software. The module interrupt request flag XP2IR is cleared by hardware upon entry
into the service routine, regardless of how many channel interrupts were active. However, it
Doc ID 8673 Rev. 3
ST10F280
PWM module
will be set again if during execution of the service routine a new channel interrupt request is
generated.
XP2IC
15
14
13
12
11
10
9
8
7
6
-
-
-
-
-
-
-
-
XP2IR
XP2IE
ILVL
GLVL
R/W
R/W
R/W
R/W
Address:
0xF196h / CBh ESFR
Reset:
0x--00h
Type:
R/W
5
4
3
2
1
0
Note:
Refer to the general Interrupt Control Register description for an explanation of the control
fields.
11.2.5
XPWM output signals
The output signals of the four XPWM channels are XPWM3...XPWM0. The output signal of
each PWM channel is individually enabled by control bit PENx in register XPWMCON1.
The XPWM signals are XORed with the outputs of the register XPOLAR(3...0) before being
driven to the output pins. This allows driving the XPWM signal directly to the output pin
(XPOLAR.x=’0’) or driving the inverted XPWM signal (XPOLAR.x=’1’).
Figure 24. XPWM output signal generation
807-#/.0%.
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8/2
07-
0IN807-
07-
07-
07-
807-#/.0%.
807-#/.0"
,ATCH80/,!2
("1($'5
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PWM module
11.2.6
ST10F280
XPOLAR Register (polarity of the XPWM channel)
XPOLAR
15
14
13
12
11
10
9
8
7
6
5
4
-
-
-
-
-
-
-
-
-
-
-
-
3
R/W
Address:
0xEC04h
Reset:
0x0000h
Type:
R/W
2
1
0
XPOLAR.3 XPOLAR.2 XPOLAR.1 XPOLAR.0
R/W
R/W
R/W
XPOLAR.x XPOLAR Channel x polarity Bit
0: Polarity of Channel x is normal
1: Polarity of Channel x is inverted
Software control of the XPWM outputs
In an application the XPWM output signals are generally controlled by the XPWM module.
However, it may be necessary to influence the level of the XPWM output pins via software
either to initialize the system or to react on some extraordinary condition, e.g. a system fault
or an emergency.
Clearing the timer run bit PTRx stops the associated counter and leaves the respective
output at its current level.
The individual XPWM channel outputs are controlled by comparators according to the
formula:
●
PWM output signal = [PTx] ≥ [PWx shadow latch].
So whenever software changes registers XPTx, the respective output will reflect the
condition after the change. Loading timer XPTx with a value greater than or equal to the
value in XPWx immediately sets the respective output, a XPTx value below the XPWx value
clears the respective output.
Note:
92/239
To prevent further PWM pulses from occurring after such a software intervention the
respective counter must be stopped first.
Doc ID 8673 Rev. 3
ST10F280
12
Parallel ports
Parallel ports
In order to accept or generate single external control signals or parallel data, the ST10F280
provides up to 143 parallel I/O lines, organized into two 16-bit I/O port (Port 2, XPort9), eight
8-bit I/O ports (PORT0 made of P0H and P0L, PORT1 made of P1H and P1L, Port 4, Port 6,
Port 7, Port 8), one 15-bit I/O port (Port 3) and two 16-bit input port (Port 5, XPort10).
These port lines may be used for general purpose Input/Output, controlled via software, or
may be used implicitly by ST10F280’s integrated peripherals or the External Bus Controller.
All port lines are bit addressable, and all input/output lines are individually (bit-wise)
programmable as inputs or outputs via direction registers (except Port 5, XPort10). The I/O
ports are true bidirectional ports which are switched to high impedance state when
configured as inputs. The output drivers of seven I/O ports (2, 3, 4, 6, 7, 8, 9) can be
configured (pin by pin) for push/pull operation or open-drain operation via ODPx control
registers.
The output driver of the pads are programmable to adapt the edge characteristics to the
application requirement and to improve the EMI behaviour.
This is possible using the POCONx registers for Ports P0L, P0H, P1L, P1H, P2, P3, P4, P6,
P7, P8. The output driver capabilities of ALE, RD and WR control lines are programmable
with the dedicated bits of POCON20 control register.
The input threshold levels are programmable (TTL/CMOS) for five ports (2, 3, 4, 7, 8) with
the PICON register control bits. 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.
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 readmodify-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.
Note:
The new I/O ports (XPort9, XPort10) are not mapped on the SFR space but on the internal
XBUS interface. The XPort9 and XPort10 are enabled by setting XPEN bit 2 of the SYSCON
register and bit 3 of the new XPERCON register. On the XBUS interface, the registers are
not bit-addressable.
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9 9 9 9 9 9 9 9
9 9 9 9 9 9 9 9
Doc ID 8673 Rev. 3
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9 9 9 9 9 9 9 9
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9 9 9 9 9 9 9 9
9 9 9 9 9 9 9 9 9 9 9 9 9 9
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Parallel ports
ST10F280
Figure 25. SFRs associated with the parallel ports
("1($'5
ST10F280
Parallel ports
Figure 26. XBUS registers associated with the parallel ports
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
80
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
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803%4
9 9 9
9 9 9 9 9 9 99 9 99 9 9
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12.1
Introduction
12.1.1
Open drain mode
In the ST10F280 some ports provide Open Drain Control. This makes it possible to switch
the output driver of a port pin from a push/pull configuration to an open drain configuration.
In push/pull mode a port output driver has an upper and a lower transistor, thus it can
actively drive the line either to a high or a low level. In open drain mode the upper transistor
is always switched off, and the output driver can only actively drive the line to a low level.
When writing a ‘1’ to the port latch, the lower transistor is switched off and the output enters
a high-impedance state. The high level must then be provided by an external pull-up device.
With this feature, it is possible to connect several port pins together to a Wired-AND
configuration, saving external glue logic and/or additional software overhead for
enabling/disabling output signals.
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.
Figure 27. Output drivers in push/pull mode and in open drain mode
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0IN
1
0IN
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Parallel ports
12.1.2
ST10F280
Input threshold control
The standard inputs of the ST10F280 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, Port4, 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.
The Port Input Control register PICON is used to select these thresholds for each byte of the
indicated ports, i.e. the 8-bit ports P7 and P8 are controlled by one bit each while ports P2
and P3 are controlled by two bits each.
PICON
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
P8LIN P7LIN
R/W
Address:
0xF1C4h / E2h ESFR
Reset:
0x--00h
Type:
R/W
6
R/W
5
-
4
3
2
1
0
P4LIN P3HIN P3LIN P2HIN P2LIN
R/W
R/W
R/W
R/W
R/W
R/W
PxLIN Port x Low Byte Input Level Selection
0: Pins Px.7...Px.0 switch on standard TTL input levels
1: Pins Px.7...Px.0 switch on special threshold input levels
PxHIN Port x High Byte Input Level Selection
0: Pins Px.15...Px.8 switch on standard TTL input levels
1: Pins Px.15...Px.8 switch on special threshold input levels
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.
Figure 28. Hysteresis for special input thresholds
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12.1.3
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:
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ST10F280
Parallel ports
Edge characteristic defines the rise/fall time for the respective output, ie. the transition time.
Slow edge 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 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.
For each feature, a 2-bit control field (ie. 4 bits) is provided for each group of 4 port pads (ie.
a port nibble), in port output control registers POCONx.
POCONx
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
Address:
0xF0yyh / zzh for 8-bit Ports ESFR
Reset:
0x--00h
Type:
R/W
7
6
5
4
3
2
1
0
PN1DC
PN1EC
PN0DC
PN0EC
R/W
R/W
R/W
R/W
POCONx
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
PN3DC
PN3EC
PN2DC
PN2EC
PN1DC
PN1EC
PN0DC
PN0EC
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xF0yyh / zzh for 16-bit Ports ESFR
Reset:
0x0000h
Type:
R/W
PNxEC Port Nibble x Edge Characteristic (rise/fall time)
00: Fast edge mode, rise/fall times depend on the driver’s dimensioning.
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.
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Parallel ports
ST10F280
Port control register allocation
The table below lists the defined POCON registers and the allocation of control bitfields and
port pins:
Table 17.
Control
register
POCON registers
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
POCON3
F08Ah
45h
P3.15,
P3.13...12
P3.11...8
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
Controlled port
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
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
Address:
0xF0AAh / 5h ESFR
Reset:
0x0000h
Type:
R/W
7
6
5
4
3
2
1
0
PN1DC
PN1EC
PN0DC
PN0EC
R/W
R/W
R/W
R/W
PN0EC RD, WR Edge Characteristic (rise/fall time)
00: Fast edge mode, rise/fall times depend on the driver’s dimensioning.
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
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ST10F280
Parallel ports
PN1EC ALE Edge Characteristic (rise/fall time)
00: Fast edge mode, rise/fall times depend on the driver’s dimensioning.
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
12.1.4
Alternate port functions
Each port line has one associated programmable alternate input or output function. PORT0
and PORT1 may be used as the address and data lines when accessing external memory.
Port 4 outputs the additional segment address bits A23/A19/A18/A16 in systems where
more than 64 KBytes of memory are to be accessed directly.
Port 6 provides the optional chip select outputs and the bus arbitration lines.
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 alternate input/output functions of timers, serial interfaces, the optional bus
control signal BHE/WRH and the system clock output (CLKOUT).
Port 5 is used for the analog input channels to the A/D converter or timer control 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. 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 user software is responsible for setting 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.
Doc ID 8673 Rev. 3
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Parallel ports
ST10F280
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 with only an alternate input function. Port lines
with only an alternate output function, however, have different structures due to the way the
direction of the pin is switched and depending on whether the pin is accessible by the user
software or not in the alternate function mode.
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).
SINGLE_BIT: BSET P4.7
BSET DP4.7
; Initial output level is "high"
; Switch on the output driver
BIT_GROUP: 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 reference the respective port (see “Particular
Pipeline Effects” in Chapter 6: Central Processing Unit (CPU)).
12.2
Port 0
The two 8-bit ports P0H and P0L represent the higher and lower part of PORT0,
respectively. Both halves of PORT0 can be written (e.g. 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 DP0H and DP0L.
100/239
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
P0L
15
14
13
12
11
10
9
8
7
-
-
-
-
-
-
-
-
P0L.7
Address:
0xFF00h / 80h SFR
Reset:
0x--00h
Type:
R/W
6
5
4
P0L.6 P0L.5
3
P0L.4
2
P0L.3 P0L.2
1
0
P0L.1 P0L.0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7
6
5
4
3
2
1
0
P0H
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
P0H.7 P0H.6 P0H.5 P0H.4 P0H.3 P0H.2 P0H.1 P0H.0
R/W
Address:
0xFF020h / 81h SFR
Reset:
0x--00h
Type:
R/W
R/W
R/W
5
4
R/W
R/W
R/W
R/W
R/W
1
0
P0X.y Port data register P0H or P0L bit y
DP0L
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
Address:
0xF100h / 80h ESFR
Reset:
0x--00h
Type:
R/W
7
6
3
2
DP0L.7 DP0L.6 DP0L.5 DP0L.4 DP0L.3 DP0L.2 DP0L.1 DP0L.0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7
6
5
4
3
2
1
0
DP0H
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
DP0H.7 DP0H.6 DP0H.5 DP0H.4 DP0H.3 DP0H.2 DP0H.1 DP0H.0
R/W
Address:
0xF102h / 81h ESFR
Reset:
0x--00h
Type:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
DP0X.y 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
Doc ID 8673 Rev. 3
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Parallel ports
12.2.1
ST10F280
Alternate functions of Port 0
When an external bus is enabled, PORT0 is used as data bus or address/data bus.
Note that an external 8-bit de-multiplexed 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 DC-level specifications) 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 such that an external pull-down resistors 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 such that
they do not disturb the normal function of PORT0 (this might be the case, for example, if the
external resistor is too strong). 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 intrasegment address as an alternate output function. PORT0 is then switched to highimpedance 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 de-multiplexed bus modes PORT0
reads the incoming instruction or data word or outputs the data byte or word.
Figure 29. Port 0 I/O and alternate functions
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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 latch 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
102/239
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
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 30 shows the structure of a PORT0 pin.
Figure 30. Block diagram of a Port 0 pin
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$IRECTION
-58
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,ATCH
2EAD$0(Y$0,Y
!LTERNATE
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12.3
Port 1
The two 8-bit ports P1H and P1L represent the higher and lower part of PORT1,
respectively. Both halves of PORT1 can be written (e.g. 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
15
14
13
12
11
10
9
8
7
-
-
-
-
-
-
-
-
P1L.7
R/W
Address:
0xFF04h / 82h SFR
Reset:
0x--00h
Type:
R/W
Doc ID 8673 Rev. 3
6
5
P1L.6 P1L.5
R/W
R/W
4
P1L.4
R/W
3
2
P1L.3 P1L.2
R/W
R/W
1
0
P1L.1 P1L.0
R/W
R/W
103/239
Parallel ports
ST10F280
P1H
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
6
R/W
Address:
0xFF06h / 83h SFR
Reset:
0x--00h
Type:
R/W
5
4
3
2
1
0
P1H.7 P1H.6 P1H.5 P1H.4 P1L.3 P1H.2 P1H.1 P1H.0
R/W
R/W
R/W
R/W
R/W
R/W
2
1
R/W
P1X.y Port data register P1H or P1L bit y
DP1L
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
Address:
0xF104h / 82h ESFR
Reset:
0x--00h
Type:
R/W
7
6
5
4
3
0
DP1L.7 DP1L.6 DP1L.5 DP1L.4 DP1L.3 DP1L.2 DP1L.1 DP1L.0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7
6
5
4
3
2
1
0
8
-
-
-
-
-
-
-
-
Address:
0xF106h / 83h ESFR
Reset:
0x--00h
Type:
R/W
DP1H.0
9
DP1H.1
10
DP1H.2
11
DP1H.3
12
DP1H.4
13
DP1H.5
14
DP1H.6
15
DP1H.7
DP1H
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
DP1X.y 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
12.3.1
Alternate functions of Port 1
When a de-multiplexed external bus is enabled, PORT1 is used as address bus.
Note that de-multiplexed bus modes use PORT1 as a 16-bit port. Otherwise all 16 port lines
can be used for general purpose I/O.
The upper four pins of PORT1 (P1H.7...P1H.4) also serve as capture input lines for the
CAPCOM2 unit (CC27IO...CC24IO).
104/239
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
As all other capture inputs, the capture input function of pins P1H.7...P1H.4 can also be
used as external interrupt inputs (200 ns sample rate at 40MHz CPU clock).
During external accesses in de-multiplexed bus modes PORT1 outputs the 16-bit intrasegment address as an alternate output function.
During external accesses in multiplexed bus modes, when no BUSCON register selects a
de-multiplexed bus mode, PORT1 is not used and is available for general purpose I/O (see
Figure 31).
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 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
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.
Figure 31. Port 1 I/O and alternate functions
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The figure below shows the structure of a PORT1 pin.
Doc ID 8673 Rev. 3
105/239
Parallel ports
ST10F280
Figure 32. Block diagram of a Port 1 pin
7RITE$0(Y$0,Y
hv
-58
$IRECTION
,ATCH
2EAD$0(Y$0,Y
!LTERNATE
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12.4
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
15
P2.15
R/W
14
13
12
P2.14 P2.13 P2.12
R/W
R/W
R/W
11
10
P2.11 P2.10
R/W
Address:
0xFFC0h / E0h SFR
Reset:
0x0000h
Type:
R/W
R/W
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
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
P2.y Port data register P2 bit y
106/239
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
DP2
DP2.0
0
DP2.1
1
DP2.2
2
DP2.3
3
DP2.4
4
DP2.5
5
DP2.6
6
DP2.7
7
DP2.8
8
DP2.9
9
DP2.10
10
DP2.11
11
DP2.12
12
DP2.13
13
DP2.14
14
DP2.15
15
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xFFC2h / E1h SFR
Reset:
0x0000h
Type:
R/W
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
ODP2.0
0
ODP2.1
1
ODP2.2
2
ODP2.3
3
ODP2.4
4
ODP2.5
5
ODP2.6
6
ODP2.7
7
ODP2.8
8
ODP2.9
9
ODP2.10
10
ODP2.11
11
ODP2.12
12
ODP2.13
13
ODP2.14
14
ODP2.15
15
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xF1C2h / E1h ESFR
Reset:
0x0000h
Type:
R/W
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
12.4.1
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.
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”.
Doc ID 8673 Rev. 3
107/239
Parallel ports
ST10F280
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”.
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 below, 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 (200 ns sample rate at 40MHz 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 25ns at 40MHz CPU clock).
P2.15 in addition serves as input for CAPCOM2 timer T7 (T7IN).
The table below summarizes the alternate functions of Port 2.
Table 18.
108/239
Port 2 alternate function
Port 2 pin
Alternate
function a)
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
CC0IO
CC1IO
CC2IO
CC3IO
CC4IO
CC5IO
CC6IO
CC7IO
CC8IO
CC9IO
CC10IO
CC11IO
CC12IO
CC13IO
CC14IO
CC15IO
Alternate function b)
EX0IN Fast External Interrupt 0 Input
EX1IN Fast External Interrupt 1 Input
EX2IN Fast External Interrupt 2 Input
EX3IN Fast External Interrupt 3 Input
EX4IN Fast External Interrupt 4 Input
EX5IN Fast External Interrupt 5 Input
EX6IN Fast External Interrupt 6 Input
EX7IN Fast External Interrupt 7 Input
Doc ID 8673 Rev. 3
Alternate function c)
T7IN Timer T7 Ext. Count Input
ST10F280
Parallel ports
Figure 33. Port 2 I/O and alternate functions
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The pins of Port 2 combine internal bus data with alternate data output before the port latch
input.
Doc ID 8673 Rev. 3
109/239
Parallel ports
ST10F280
Figure 34. Block diagram of a Port 2 pin
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110/239
Doc ID 8673 Rev. 3
ST10F280
12.5
Parallel ports
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 mode by the open drain control register ODP3 (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.
P3
15
14
P3.15
-
13
12
P3.13 P3.12
R/W
R/W
R/W
11
10
P3.11 P3.10
R/W
Address:
0xFFC4h / E2h SFR
Reset:
0x0000h
Type:
R/W
R/W
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
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
8
7
6
5
4
3
2
1
0
P3.y Port data register P3 bit y
15
14
DP3.15
-
DP3.13
DP3.12
DP3.11
DP3.10
DP3.9
DP3.8
DP3.7
DP3.6
DP3.5
DP3.4
DP3.3
DP3.2
DP3.1
DP3.0
DP3
13
12
11
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xFFC6h / E3h SFR
Reset:
0x0000h
Type:
R/W
10
9
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
Doc ID 8673 Rev. 3
111/239
Parallel ports
ST10F280
3
2
1
0
ODP3.0
4
ODP3.1
5
ODP3.2
6
ODP3.3
7
ODP3.4
R/W
8
ODP3.5
-
9
ODP3.6
-
10
ODP3.7
-
11
ODP3.8
12
ODP3.9
13
ODP3.10
14
ODP3.11
15
ODP3.13
ODP3
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xF1C6h / E3h ESFR
Reset:
0x0000h
Type:
R/W
ODP3.y 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
12.5.1
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 19.
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
112/239
Port 3 alternate functions
Alternate function
T0IN CAPCOM1 Timer 0 Count Input
T6OUT Timer 6 Toggle Output
CAPIN GPT2 Capture Input
T3OUT Timer 3 Toggle Output
T3EUD Timer 3 External Up/Down Input
T4IN Timer 4 Count Input
T3IN Timer 3 Count Input
T2IN Timer 2 Count Input
MRST SSC Master Receive / Slave Transmit
MTSR SSC Master Transmit / Slave Receive
TxD0 ASC0 Transmit Data Output
RxD0 ASC0 Receive Data Input / (Output in synchronous mode)
BHE/WRH Byte High Enable / Write High Output
SCLK SSC Shift Clock Input/Output
--- No pin assigned!
CLKOUT System Clock Output
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
Figure 35. Port 3 I/O and alternate functions
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The port structure of the Port 3 pins depends on their alternate function (see Figure 36).
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 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'). Port 3 pins with alternate output functions are:
T6OUT, T3OUT, TxD0 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.
Doc ID 8673 Rev. 3
113/239
Parallel ports
ST10F280
Figure 36. Block diagram of Port 3 pin with alternate input or alternate output
function
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Pin P3.12 (BHE/WRH) is another pin with an alternate output function, however, its structure
is slightly different (see Figure 37). 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
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’).
114/239
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
Figure 37. Block diagram of pins P3.15 (CLKOUT) and P3.12 (BHE/WRH)
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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.
12.6
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
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
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xFFC8h / E4h SFR
Reset:
0x--00h
Type:
R/W
P4.y Port data register P4 bit y
Doc ID 8673 Rev. 3
115/239
Parallel ports
ST10F280
DP4
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
R/W
Address:
0xFFCAh / E5h SFR
Reset:
0x--00h
Type:
R/W
6
5
4
3
2
1
0
DP4.7 DP4.6 DP4.5 DP4.4 DP4.3 DP4.2 DP4.1 DP4.0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
DP4.y 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 Chapter 15: CAN modules), Port 4 has a new open
drain function, controlled with the new ODP4 register:
ODP4
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
ODP4.7
ODP4.6
-
-
-
-
-
-
R/W
R/W
Address:
0xF1CAh / E5h ESFR
Reset:
0x--00h
Type:
R/W
ODP4.y 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 bits 6 and 7 are implemented, all other bits will be read as “0”.
12.6.1
Alternate functions of Port 4
During external bus cycles that use segmentation (i.e. an address space above 64K Bytes)
a number of Port 4 pins may output the segment address lines. The number of pins used for
segment address output determines the directly accessible external address space.
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 e.g. external memory
directly after reset. For this reason Port 4 will be switched to this alternate function
automatically.
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) to check the
configuration during run time.
116/239
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
Devices with CAN interfaces use 2 pins of Port 4 to interface each CAN Module to an
external CAN transceiver. In this case the number of possible segment address lines is
reduced.
The table below summarizes the alternate functions of Port 4 depending on the number of
selected segment address lines (coded via bitfield SALSEL).
.
Table 20.
Port 4
pin
Port 4 alternate functions
Std. Function
SALSEL=01 64 KB
GPIO
GPIO
GPIO
GPIO
GPIO/CAN2_RxD
GPIO/CAN1_RxD
GPIO/CAN1_TxD
GPIO/CAN2_TxD
P4.0
P4.1
P4.2
P4.3
P4.4
P4.5
P4.6
P4.7
Altern. Function
SALSEL=11 256KB
Altern. Function
SALSEL=00 1MB
Seg. Address A16
Seg. Address A17
Seg. Address A18
Seg. Address A19
GPIO/CAN2_RxD
GPIO/CAN1_RxD
GPIO/CAN1_TxD
GPIO/CAN2_TxD
Seg. Address A16
Seg. Address A17
GPIO
GPIO
GPIO/CAN2_RxD
GPIO/CAN1_RxD
GPIO/CAN1_TxD
GPIO/CAN2_TxD
Altern. Function
SALSEL=10 16MB
Seg. Address A16
Seg. Address A17
Seg. Address A18
Seg. Address A19
Seg. Address A20
Seg. Address A21
Seg. Address A22
Seg. Address A23
Figure 38. Port 4 I/O and alternate functions
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Doc ID 8673 Rev. 3
117/239
Parallel ports
ST10F280
Figure 39. Block diagram of a Port 4 pin
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118/239
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
Figure 40. Block diagram of P4.4 and P4.5 pins
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Doc ID 8673 Rev. 3
119/239
Parallel ports
ST10F280
Figure 41. Block diagram of P4.6 and P4.7 pins
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12.7
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.
120/239
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
P5
15
P5.15
R
14
13
12
11
P5.14 P5.13 P5.12
R
R
R
10
P5.11 P5.10
R
Address:
0xFFA2h / D1h SFR
Reset:
0xXXXXh
Type:
R
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
R
P5.y Port data register P5 bit y (Read only)
12.7.1
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) that can be
converted by the ADC. No special programming is required for pins that shall be used as
analog inputs. Some pins of Port 5 also serve as external timer control lines for GPT1 and
GPT2. The table below summarizes the alternate functions of Port 5.
Table 21.
Port 5 pin
P5.0
P5.1
P5.2
P5.3
P5.4
P5.5
P5.6
P5.7
P5.8
P5.9
P5.10
P5.11
P5.12
P5.13
P5.14
P5.15
Port 5 alternate functions
Alternate function a)
Alternate function b)
T6EUD Timer 6 ext. Up/Down Input
T5EUD Timer 5 ext. Up/Down Input
T6IN Timer 6 Count Input
T5IN Timer 5 Count Input
T4EUD Timer 4 ext. Up/Down Input
T2EUD Timer 2 ext. Up/Down Input
Analog Input AN0
Analog Input AN1
Analog Input AN2
Analog Input AN3
Analog Input AN4
Analog Input AN5
Analog Input AN6
Analog Input AN7
Analog Input AN8
Analog Input AN9
Analog Input AN10
Analog Input AN11
Analog Input AN12
Analog Input AN13
Analog Input AN14
Analog Input AN15
Doc ID 8673 Rev. 3
121/239
Parallel ports
ST10F280
Figure 42. Port 5 I/O and alternate functions
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Port 5 pins have a special port structure (see Figure 43), 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 43. Block diagram of a Port 5 pin
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122/239
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
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
P5DIDIS.0
0
P5DIDIS.1
1
P5DIDIS.2
2
P5DIDIS.3
3
P5DIDIS.4
4
P5DIDIS.5
5
P5DIDIS.6
6
P5DIDIS.7
7
P5DIDIS.8
8
P5DIDIS.9
9
P5DIDIS.10
10
P5DIDIS.11
11
P5DIDIS.12
12
P5DIDIS.13
13
P5DIDIS.14
14
P5DIDIS.15
15
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xFFA4h / D2h SFR
Reset:
0x0000h
Type:
R/W
P5DIDIS.y Port 5 Digital Disablel 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)
Doc ID 8673 Rev. 3
123/239
Parallel ports
12.8
ST10F280
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)
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
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7
6
5
4
3
2
1
0
Address:
0xFFCCh / E6h SFR
Reset:
0x--00h
Type:
R/W
P6.y Port data register P6 bit y
DP6
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
DP6.7 DP6.6 DP6.5 DP6.4 DP6.3 DP6.2 DP6.1 DP6.0
R/W
Address:
0xFFCEh / E7h SFR
Reset:
0x--00h
Type:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
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
-
-
-
-
-
-
-
-
Address:
0xF1CEh / E7h ESFR
Reset:
0x--00h
Type:
R/W
7
6
5
4
3
1
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
ODP6.y 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
124/239
2
ODP6.0
8
ODP6.1
9
ODP6.2
10
ODP6.3
11
ODP6.4
12
ODP6.5
13
ODP6.6
14
ODP6.7
15
Doc ID 8673 Rev. 3
ST10F280
12.8.1
Parallel ports
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 the 5 pins of Port 6. The number of chip
select signals is selected via PORT0 during reset. The selected value can be read from
bitfield CSSEL in register RP0H (read only) e.g. in order to check the configuration during
run time. The table below summarizes the alternate functions of Port 6 depending on the
number of selected chip select lines (coded via bitfield CSSEL).
Table 22.
Port 6 Pin
Port 6 alternate functions
Altern. Function
CSSEL = 10
Altern. Function
CSSEL = 01
P6.0
P6.1
P6.2
P6.3
P6.4
General purpose I/O
General purpose I/O
General purpose I/O
General purpose I/O
General purpose I/O
Chip select CS0
Chip select CS1
Gen. purpose I/O
Gen. purpose I/O
Gen. purpose I/O
P6.5
P6.6
P6.7
HOLD External hold request input
HLDA Hold acknowledge output
BREQ Bus request output
Altern. Function
CSSEL = 00
Chip select CS0
Chip select CS1
Chip select CS2
Gen. purpose I/O
Gen. purpose I/O
Altern. Function
CSSEL = 11
Chip select
Chip select
Chip select
Chip select
Chip select
CS0
CS1
CS2
CS3
CS4
Figure 44. Port 6 I/O and alternate functions
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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.
Doc ID 8673 Rev. 3
125/239
Parallel ports
ST10F280
Figure 45. Block diagram of Port 6 pins with an alternate output function
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Note:
126/239
* P6.5 has only alternate input function.
Doc ID 8673 Rev. 3
ST10F280
12.9
Parallel ports
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
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
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7
6
5
4
3
2
1
0
Address:
0xFFD0h / E8h SFR
Reset:
0x--00h
Type:
R/W
P7.y
Port data register P7 bit y
DP7
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
DP7.7 DP7.6 DP7.5 DP7.4 DP7.3 DP7.2 DP7.1 DP7.0
R/W
Address:
0xFFD2h / E9h SFR
Reset:
0x--00h
Type:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
DP7.y 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
Doc ID 8673 Rev. 3
127/239
Parallel ports
ST10F280
ODP7
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
R/W
Address:
0xF1D2h / E9h ESFR
Reset:
0x--00h
Type:
R/W
6
5
4
3
2
1
0
ODP7.7 ODP7.6 ODP7.5 ODP7.4 ODP7.3 ODP7.2 ODP7.1 ODP7.0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
ODP7.y 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
12.9.1
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 (200 ns sample rate at 40MHz 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 XORed 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 invert its level at the pin (port
latch holds a ‘1’).
Note that the PWM outputs must be enabled via the respective PENx bits in PWMCON1.
The table below summarizes the alternate functions of Port 7.
Table 23.
Port 7 pin
P7.0
P7.1
P7.2
P7.3
P7.4
P7.5
P7.6
P7.7
128/239
Port 7 alternate functions
Alternate function
POUT0 PWM mode channel 0 output
POUT1 PWM mode channel 1 output
POUT2 PWM mode channel 2 output
POUT3 PWM mode channel 3 output
CC28IO Capture input / compare output channel 28
CC29IO Capture input / compare output channel 29
CC30IO Capture input / compare output channel 30
CC31IO Capture input / compare output channel 31
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
Figure 46. Port 7 I/O and alternate functions
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The port structures of Port 7 differ in the way the output latches are connected to the internal
bus and to the pin driver (see the two Figure 47). Pins P7.3...P7.0 (POUT3...POUT0) XOR
the alternate data output with the port latch output, which allows to use the alternate data
directly or inverted at the pin driver.
Figure 47. Block diagram of Port 7 pins P7.3...P7.0
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Doc ID 8673 Rev. 3
129/239
Parallel ports
ST10F280
Figure 48. Block diagram of Port 7 pins P7.7...P7.4
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130/239
Doc ID 8673 Rev. 3
ST10F280
12.10
Parallel ports
Port 8
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 DP8. Each port line can be switched into push/pull
or open drain mode via the open drain control register ODP8.
P8
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
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7
6
5
4
3
2
1
0
Address:
0xFFD40h / EAh SFR
Reset:
0x--00h
Type:
R/W
P8.y Port data register P8 bit y
DP8
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
DP8.7 DP8.6 DP8.5 DP8.4 DP8.3 DP8.2 DP8.1 DP8.0
R/W
Address:
0xFFD6h / EBh SFR
Reset:
0x--00h
Type:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
DP8.y 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
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
0xF1D6h / EBh ESFR
Reset:
0x--00h
Type:
R/W
5
4
3
2
1
0
ODP8.7 ODP8.6 ODP8.5 ODP8.4 ODP8.3 ODP8.2 ODP8.1 ODP8.0
R/W
Address:
6
R/W
R/W
R/W
R/W
R/W
R/W
R/W
ODP8.y 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
Doc ID 8673 Rev. 3
131/239
Parallel ports
12.10.1
ST10F280
Alternate functions of Port 8
The 8 lines of Port 8 (P8.7...P8.0) serve as capture inputs or 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 (200 ns sample rate at 40MHz CPU clock).
The Table 24 summarizes the alternate functions of Port 8.
Table 24.
Port 8 alternate functions
Port 7
P8.0
P8.1
P8.2
P8.3
P8.4
P8.5
P8.6
P8.7
Alternate function
CC16IO Capture input / compare output channel 16
CC17IO Capture input / compare output channel 17
CC18IO Capture input / compare output channel 18
CC19IO Capture input / compare output channel 19
CC20IO Capture input / compare output channel 20
CC21IO Capture input / compare output channel 21
CC22IO Capture input / compare output channel 22
CC23IO Capture input / compare output channel 23
Figure 49. Port 8 I/O and alternate functions
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The port structures of Port 8 differ in the way the output latches are connected to the internal
bus and to the pin driver (see the Figure 50). 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.
132/239
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
Figure 50. Block diagram of Port 8 pins P8.7...P8.0
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Doc ID 8673 Rev. 3
133/239
Parallel ports
12.11
ST10F280
XPort 9
The XPort9 is enabled by setting XPEN bit 2 of the SYSCON register and XPORT9EN bit 3
of the new XPERCON register. On the XBUS interface, the register are not bit-addressable
This 16-bit port is used for general purpose I/O, the direction of each line can be configured
via the corresponding direction register XDP9. Each port line can be switched into push/pull
or open drain mode via the open drain control register XODP9.
All port lines can be individually (bit-wise) programmed. The “bit-addressable” feature is
available via specific “Set” and “Clear” registers: XP9SET, XP9CLR, XDP9SET, XDP9CLR,
XODP9SET, XODP9CLR.
XP9
XP9.0
0
XP9.1
1
XP9.2
2
XP9.3
3
XP9.4
4
XP9.5
5
XP9.6
6
XP9.7
7
XP9.8
8
XP9.9
9
XP9.10
10
XP9.11
11
XP9.12
12
XP9.13
13
XP9.14
14
XP9.15
15
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xC100h
Reset:
0x0000h
Type:
R/W
XP9.y Port data register XP9 bit y
XP9SET (C102h)
XP9SET.0
0
XP9SET.1
1
XP9SET.2
2
XP9SET.3
3
XP9SET.4
4
XP9SET.5
5
XP9SET.6
6
XP9SET.7
7
XP9SET.8
8
XP9SET.9
9
XP9SET.10
10
XP9SET.11
11
XP9SET.12
12
XP9SET.13
13
XP9SET.14
14
XP9SET.15
15
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
Address:
0xC102h
Reset:
0x0000h
Type:
W
XP9SET.y Writing a ‘1’ will set the corresponding bit in XP9 register, Writing a ‘0’ has no effect.
134/239
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
XP9CLR
XP9CLR.0
0
XP9CLR.1
1
XP9CLR.2
2
XP9CLR.3
3
XP9CLR.4
4
XP9CLR.5
5
XP9CLR.6
6
XP9CLR.7
7
XP9CLR.8
8
XP9CLR.9
9
XP9CLR.10
10
XP9CLR.11
11
XP9CLR.12
12
XP9CLR.13
13
XP9CLR.14
14
XP9CLR.15
15
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
Address:
0xC104h
Reset:
0x0000h
Type:
W
XP9CLR.y Writing a ‘1’ will clear the corresponding bit in XP9 register, Writing a ‘0’ has no effect.
XDP9
XDP9.0
0
XDP9.1
1
XDP9.2
2
XDP9.3
3
XDP9.4
4
XDP9.5
5
XDP9.6
6
XDP9.7
7
XDP9.8
8
XDP9.9
9
XDP9.10
10
XDP9.11
11
XDP9.12
12
XDP9.13
13
XDP9.14
14
XDP9.15
15
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xC200h
Reset:
0x0000h
Type:
R/W
XDP9.y Port direction register XDP9 bit y
XDP9.y = 0: Port line XP9.y is an input (high-impedance)
XDP9.y = 1: Port lineX P9.y is an output
XDP9SET
XDP9 SET.0
0
XDP9 SET.1
1
XDP9 SET.2
2
XDP9 SET.3
3
XDP9 SET.4
4
XDP9 SET.5
5
XDP9 SET.6
6
XDP9 SET.7
7
XDP9 SET.8
8
XDP9 SET.9
9
XDP9 SET.10
10
XDP9 SET.11
11
XDP9 SET.12
12
XDP9 SET.13
13
XDP9 SET.14
14
XDP9 SET.15
15
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
Address:
0xC202h
Reset:
0x0000h
Type:
W
XDP9SET.y Writing a ‘1’ will set the corresponding bit in XDP9 register, Writing a ‘0’ has no effect.
Doc ID 8673 Rev. 3
135/239
Parallel ports
ST10F280
XDP9CLR
XDP9 CLR.0
0
XDP9 CLR.1
1
XDP9 CLR.2
2
XDP9 CLR.3
3
XDP9 CLR.4
4
XDP9 CLR.5
5
XDP9 CLR.6
6
XDP9 CLR.7
7
XDP9 CLR.8
8
XDP9 CLR.9
9
XDP9 CLR.10
10
XDP9 CLR.11
11
XDP9 CLR.12
12
XDP9 CLR.13
13
XDP9 CLR.14
14
XDP9 CLR.15
15
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
Address:
0xC204h
Reset:
0x0000h
Type:
W
XDP9CLR.y Writing a ‘1’ will clear the corresponding bit in XDP9 register, Writing a ‘0’ has no
effect.
XODP9
XODP9 .1
XODP9 .0
0
XODP 9.2
1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xC300h
Reset:
0x0000h
Type:
R/W
XODP9.y Port 9 Open Drain control register bit y
XODP9.y = 0: Port line XP9.y output driver in push/pull mode
XODP9.y = 1: Port line XP9.y output driver in open drain mode
136/239
2
XODP9 .3
3
XODP9 .4
4
XODP9 .5
5
XODP9 .6
6
XODP9 .7
7
XODP9 .8
8
XODP9 .9
9
XODP9 .10
10
XODP9 .11
11
XODP9 .12
12
XODP9 .13
13
XODP9 .14
14
XODP9 .15
15
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
XODP9SET (C302h)
XODP9SET.0
0
XODP9SET.1
1
XODP9SET.2
2
XODP9SET.3
3
XODP9SET.4
4
XODP9SET.5
5
XODP9SET.6
6
XODP9SET.7
7
XODP9SET.8
8
XODP9SET.9
9
XODP9SET.10
10
XODP9SET.11
11
XODP9SET.12
12
XODP9SET.13
13
XODP9SET.14
14
XODP9SET.15
15
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
Address:
0xC302h
Reset:
0x0000h
Type:
W
XODP9SET.y Writing a ‘1’ will set the corresponding bit in XODP9 register, Writing a ‘0’ has no
effect.
XODP9CLR
XODP9CLR.0
0
XODP9CLR.1
1
XODP9CLR.2
2
XODP9CLR.3
3
XODP9CLR.4
4
XODP9CLR.5
5
XODP9CLR.6
6
XODP9CLR.7
7
XODP9CLR.8
8
XODP9CLR.9
9
XODP9CLR.10
10
XODP9CLR.11
11
XODP9CLR.12
12
XODP9CLR.13
13
XODP9CLR.14
14
XODP9CLR.15
15
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
Address:
0xC304h
Reset:
0x0000h
Type:
W
XODP9CLR.y Writing a ‘1’ will clear the corresponding bit in XODP9 register, Writing a ‘0’ has no
effect.
Doc ID 8673 Rev. 3
137/239
Parallel ports
12.12
ST10F280
XPort 10
The XPort10 is enabled by setting XPEN bit 2 of the SYSCON register and bit 3 of the new
XPERCON register. On the XBUS interface, the register are not bit-addressable. This 16-bit
input port can only read data. There is no output latch and no direction register. Data written
to XP10 will be lost.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
XP10 .15
XP10 .14
XP10 .13
XP10 .12
XP10 .11
XP10 .10
XP10 .9
XP10 .8
XP10 .7
XP10 .6
XP10 .5
XP10 .4
XP10 .3
XP10 .2
XP10 .1
XP10 .0
XP10
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Address:
0xC380h
Reset:
0xXXXXh
Type:
R
XP10.y Port data register XP10 bit y (Read only)
12.12.1
Alternate functions of XPort 10
Each line of XPort 10 is also connected to one of the multiplexer of the Analog/Digital
Converter. All port lines (XP10.15...XP10.0) can accept analog signals (AN31...AN16) that
can be converted by the ADC. No special programming is required for pins that shall be
used as analog inputs. The Table 25 summarizes the alternate functions of XPort 10.
Table 25.
138/239
XPort 10 alternate functions
XPort 10 Pin
Alternate function
P10.0
P10.1
P10.2
P10.3
P10.4
P10.5
P10.6
P10.7
P10.8
P10.9
P10.10
P10.11
P10.12
P10.13
P10.14
P10.15
Analog Input AN16
Analog Input AN17
Analog Input AN18
Analog Input AN19
Analog Input AN20
Analog Input AN21
Analog Input AN22
Analog Input AN23
Analog Input AN24
Analog Input AN25
Analog Input AN26
Analog Input AN27
Analog Input AN28
Analog Input AN29
Analog Input AN30
Analog Input AN31
Doc ID 8673 Rev. 3
ST10F280
Parallel ports
Figure 51. PORT10 I/O and alternate functions
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12.12.2
New disturb protection on analog inputs
A new register is provided for additional disturb protection support on analog inputs for Port
XP10:
XP10DIDIS
Address:
0xC382h
Reset:
0x0000h
Type:
R/W
0
XP10DIDIS.0
1
XP10DIDIS.1
2
XP10DIDIS.2
3
XP10DIDIS.3
4
XP10DIDIS.4
5
XP10DIDIS.5
6
XP10DIDIS.6
7
XP10DIDIS.7
8
XP10DIDIS.8
R/W
9
XP10DIDIS.9
R/W
10
XP10DIDIS .10
R/W
11
XP10DIDIS .11
R/W
12
XP10DIDIS .12
XP10DIDIS .13
13
XP10DIDIS .14
14
XP10DIDIS .15
15
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
XP10DIDIS.y XPort 10 Digital Disable register bit y
0: Port line XP10.y digital input is enabled (Schmitt trigger enabled)
1: Port line XP10.y digital input is disabled (Schmitt trigger disabled, necessary for
input leakage current reduction)
Doc ID 8673 Rev. 3
139/239
A/D converter
ST10F280
13
A/D converter
13.1
A/D converter module
A 10-bit A/D converter with 2 x 16 multiplexed input channels and a sample and hold circuit
is integrated on-chip. This A/D Converter does not have the self-calibration feature. Thus,
guaranteed Total Unadjusted Error is + 2 LSB. Refer to Section 20.3.1: A/D converter
characteristics for detailled characteristics. The sample time (for loading the capacitors) and
the conversion time is programmable and can be adjusted to the external circuitry.
Convertion time is fully equivalent to the one of previous generation A/D self-calibrated
Converter.
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 ST10F280 supports four different conversion modes:
Single channel conversion mode the analog level on a specified channel is sampled once
and converted to a digital result.
Single channel continuous mode the analog level on a specified channel is repeatedly
sampled and converted without software intervention.
Auto scan mode the analog levels on a pre-specified number of channels are sequentially
sampled and converted.
Auto scan continuous mode the number of pre-specified channels is repeatedly sampled
and converted.
Channel Injection Mode injects a channel into a running sequence without disturbing this
sequence. The peripheral event controller stores the conversion results in memory without
entering and exiting interrupt routines for each data transfer.
13.2
Multiplexage of two blocks of 16 analog Inputs
The ADC can manage 16 analog inputs, so to increase its capability, a new XADCMUX
register is added to control the multiplexage between the first block of 16 channels on Port5
and the second block of 16 channels on XPort10. The conversion result register stays
identical and only a software management can determine the block in use.
140/239
Doc ID 8673 Rev. 3
ST10F280
A/D converter
Figure 52. Block diagram
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The XADCMUX register is enabled by setting XPEN bit 2 of the SYSCON register and bit 3
of the new XPERCON register
XADCMUX
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
XADCMUX
R/W
Address:
0xC384h
Reset:
0x0000h
Type:
R/W
XADCMUX.0 0: Default configuration,analog inputs on port P5.y can be converted
1: Analog inputs on port XP10.y can be converted
13.3
XTIMER peripheral (trigger for ADC channel injection)
This new peripheral is dedicated for the Channel Injection Mode of the A/D converter. This
mode injects a channel into a running sequence without disturbing this sequence. The
peripheral event controller stores the conversion results in memory without entering and
exiting interrupt routines for each data transfer.
A channel injection can be triggered by an event on Capture/Compare CC31 (Port P7.7) of
the CAPCOM2 unit.
The dedicated output XADCINJ of the XTIMER must be connected externally on the input
P7.7/CC31.
Doc ID 8673 Rev. 3
141/239
A/D converter
ST10F280
Due to the multiplexed inputs, at a time, the ADC exclusively converts the Port5 inputs or the
XPort10 inputs. If one "y" channel has to be used continuously in injection mode, it must be
externally hardware connected to the Port5.y and XPort10.y inputs.
The XTIMER peripheral is enabled by setting XPEN bit 2 of the SYSCON register and bit 3
of the new XPERCON register.
13.3.1
Main features
The XTIMER features are :
●
16 bits linear timer / 4 bits exponential prescaler
●
Counting between 16 bits “start value” and 16 bits “end value”
●
Counting period between 4 cycles and 2**33 cycles (100 ns and 214s using 40MHz
CPU clock)
●
1 trigger ouput (XADCINJ)
●
Programmable functions :
●
–
Internal clock XCLK is derivated from the CPU clock and has the same period
–
Up counting / down counting
–
Reload enable
–
Continue / stop modes
4 memory mapped registers :
–
Control / prescaler
–
Start value
–
End value
–
Current value
Table 26.
The different counting Modes
TLE TCS TCVR(n) = TEVR
x
x
x
TUD
TEN
x
0
TCVR(n+1)
comments
Timer disable
TCVR(n)
x
0
1
x
x
0
x
Stop
Decrement
0
0
1
TCVR(n)-1
1
Decrement (Continue)
1
x
x
0
Increment
1
142/239
0
1
1
1
1
1
TCVR(n)+1
Increment (Continue)
x
TSVR
Doc ID 8673 Rev. 3
Load
ST10F280
13.3.2
A/D converter
Register description
TCR: Timer Control Register
XTCR
15
14
13
12
11
10
5
4
3
2
1
0
0
0
0
0
0
0
TFP[3:0]
TCM
TIE
TCS
TLE
TUD
TEN
R
R
R
R
R
R
RW
RW
RW
RW
RW
RW
RW
Address:
0xC000h
Reset:
0x0000h
Type:
R, R/W
9
8
7
6
TEN Timer Enable
When TEN = ’0’, the Timer is disabled (reset value). To avoid glitches, it is recommended
to modify TCR in 2 steps, first with new values and and second by setting TEN.
TUD Timer Up / Down Counting
When TUD = ’0’, the Timer is counting "down" (reset value), ie the TCVR (’current value’)
register content is decremented.
When TUD = ’1’, the Timer is counting "up", ie the TCVR (’current value’) register content
is incremented.
TLE Timer Load Enable
When the counter has reached its end value (TCVR = TEVR), TCVR is (re)loaded with
TSVR (’start value’) register content when TLE = ’1’. When TLE = ’0’ (reset value), the
next state of TCVR depends on TCS bit.
TCS Timer Continue / Stop
When TLE = ’0’ (no load) and when the counter has reached its end value (TCVR =
TEVR), the TCVR content continues to increment / decrement according to TUD bit when
TCS = ’1’ (continue mode).
When TCS = ’0’ (stop mode reset value), TCVR is stopped and its content is frozen.
TIE Timer Output Enable
When the counter has reached its end value (TCVR = TEVR), the XADCINJ output is set
when TIE = ’1’.
When TIE = ’0’ (reset value), XADCINJ output is disabled (= ’0’).
TCM Timer Clock Mode Must be Cleared
TCM = ’0’ (reset value), the TCVR clock is derived from internal XCLK clock according to
TFP bits.
TFP[3:0] Timer Frequency Prescaler
When TCM = ’0’ (internal clock), the TCVR register clock is derived from the XCLK clock
input by dividing XCLK by 2**(2+ TFP). The coding is as follows :
0000 : prescaler by 2 (reset value), XCLK divided by 4
0001 : prescaler by 4, XCLK divided by 8
0010 : prescaler by 8, XCLK divided by 16
...
1111 : prescaler by 2**16, XCLK divided by 2**17
Doc ID 8673 Rev. 3
143/239
A/D converter
ST10F280
XTSVR : Timer Start Value Register
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
TSVR
RW
Address:
0xC002h
Reset:
0x0000h
Type:
R/W
TSVR[15:0] Timer Start Value
TSVR contains the data to be transferred to the TCVR ’Current Value’ register when :
– TEN = ’1’ (TIM enable),
TLE = ’1’ (TIM Load enable),
TCVR = TEVR (count period finished),
TCS = ’1’ (stop mode disabled).
– first counting clock rising edge after the timer start (the timer starts on TEN rising
edge).
XTEVR : Timer End Value Register
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
TEVR
RW
Address:
0xC004h
Reset:
0x0000h
Type:
R/W
TEVR[15:0] Timer End Value
TEVR contains the data to be compared to the TCVR ’Current Value’ register.
XTCVR : Timer Current Value Register
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
TCVR
R
Address:
0xC006h
Reset:
0x0000h
Type:
R
TCVR[15:0] Timer Current Value
TCVR contains the current counting value. When TCVR = TEVR, TCVR content is
changed according to Table . The TCVR clock is derived from internal XCLK clock
according to TFP bits when TCM = ’0’.
144/239
Doc ID 8673 Rev. 3
ST10F280
A/D converter
Registers mapping
Table 27.
Timer registers mapping
Address (Hexa)
13.3.3
Register Name
Reset Value (Hexa)
Access
C000h
XTCR : Control
0000h
RW
C002h
XTSVR : Start Value
0000h
RW
C004h
XTEVR : End Value
0000h
RW
C006h
XTCVR : Current Value
0000h
R
Block diagram
Figure 53. XTIMER block diagram
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Clocks
The XTCVR register clock is the prescaler output. The prescaler allows to divide the basic
register frequency in order to offer a wide range of counting period, from 2**2 to 2**33
cycles (note that 1 cycle = 1 XCLK periods).
Doc ID 8673 Rev. 3
145/239
A/D converter
ST10F280
Registers
The XTCVR register input is linked to several sources:
●
XTSVR register (start value) for reload when the period is finished, or for load when
the timer is starting.
●
Incrementer output when the ’up’ mode is selected,
●
Decrementer output when the ’down’ mode is selected.
●
The selection between the sources is made through the XTCR control register.
When starting the timer, by setting TEN bit of TCR to ’1’, XTCVR will be loaded with XTSVR
value on the first rising edge of the counting clock. That’s to say that for counting from 0000h
to 0009h for example, 10 counting clock rising edges are required.
The XTCVR register output is continuously compared to the XTEVR register to detect the
end of the counting period. When the registers are equal, several actions are made
depending on the XTCR control register content :
●
The output XADCINJ is conditionally generated,
●
XTCVR is loaded with XTSVR or stops or continues to count (see Table ).
XTEVR, XTSVR and all TCR bits except TEN must not be modified while the timer is
counting, ie while TEN bit of TCR = ’1’. The timer behaviour is not guaranteed if this rule is
not respected. It implies that the timer can be configured only when stopped (TEN = ’0’).
When programming the timer, XTEVR, XTSVR and XTCR bits except TEN can be modified,
with TEN = ’0’; then the timer is started by modifying only TEN bit of TCR. To stop the timer,
only TEN bit should be modified, from ’1’ to ’0’.
Timer output (XADCINJ)
The XADCINJ output is the result of the (XTCVR = XTEVR) flag after differentiation. The
duration of the output lasts two cycles (50ns at 40MHz).
Figure 54. XADCINJ timer output
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146/239
Doc ID 8673 Rev. 3
ST10F280
A/D converter
Figure 55. External connection for ADC channel injection
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Doc ID 8673 Rev. 3
147/239
Serial channels
14
ST10F280
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.
14.1
Asynchronous / Synchronous Serial Interface (ASCO)
The asynchronous / synchronous serial interface (ASCO) provides serial communication
between the ST10F280 and other microcontrollers, microprocessors or external peripherals.
A set of registers is used to configure and to control the ASCO serial interface:
148/239
●
P3, DP3, ODP3 for pin configuration
●
SOBG for Baud rate generator
●
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
Doc ID 8673 Rev. 3
ST10F280
14.1.1
Serial channels
ASCO in asynchronous mode
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. Fullduplex communication up to 1.25M Bauds (at 40MHz of fCPU) is supported in this mode.
Figure 56. Asynchronous mode of serial channel ASC0
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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.
Doc ID 8673 Rev. 3
149/239
Serial channels
ST10F280
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 28.
Table 28.
Commonly used baud rates by reload value and deviation errors
S0BRS = ‘0’, fCPU = 40MHz
Note:
150/239
S0BRS = ‘1’, fCPU = 40MHz
Baud rate
(Baud)
Deviation
error
Reload value
(hexa)
Baud rate
(Baud)
Deviation
error
Reload value
(hexa)
1 250 000
0.0% / 0.0%
0000 / 0000
833 333
0.0% / 0.0%
0000 / 0000
112 000
+1.5% /7.0%
000A / 000B
112 000
+6.3% /7.0%
0006 / 0007
56 000
+1.5% /3.0%
0015 / 0016
56 000
+6.3% /0.8%
000D / 000E
38 400
+1.7% /1.4%
001F / 0020
38 400
+3.3% /1.4%
0014 / 0015
19 200
+0.2% /1.4%
0040 / 0041
19 200
+0.9% /1.4%
002A / 002B
9 600
+0.2% /0.6%
0081 / 0082
9 600
+0.9% /0.2%
0055 / 0056
4 800
+0.2% /0.2%
0103 / 0104
4 800
+0.4% /0.2%
00AC / 00AD
2 400
+0.2% /0.0%
0207 / 0208
2 400
+0.1% /0.2%
015A / 015B
1 200
0.1% / 0.0%
0410 / 0411
1 200
+0.1% /0.1%
02B5 / 02B6
600
0.0% / 0.0%
0822 / 0823
600
+0.1% /0.0%
056B / 056C
300
0.0% / 0.0%
1045 / 1046
300
0.0% / 0.0%
0AD8 / 0AD9
153
0.0% / 0.0%
1FE8 / 1FE9
102
0.0% / 0.0%
1FE8 / 1FE9
The deviation errors given in the Table 28 are rounded. To avoid deviation errors use a Baud
rate crystal (providing a multiple of the ASC0/SSC sampling frequency).
Doc ID 8673 Rev. 3
ST10F280
14.1.2
Serial channels
ASCO in synchronous mode
In synchronous mode, data are transmitted or received synchronously to a shift clock which
is generated by the ST10F280. Half-duplex communication up to 5M Baud (at 40MHz of
fCPU) is possible in this mode.
Figure 57. Synchronous mode of serial channel ASC0
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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.
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Serial channels
ST10F280
Using the above equation, the maximum Baud rate can be calculated for any clock speed as
given in Table 29.
Table 29.
Commonly used baud rates by reload value and deviation errors
S0BRS = ‘0’, fCPU = 40MHz
S0BRS = ‘1’, fCPU = 40MHz
Baud rate
(Baud)
Deviation
error
Reload value
(hexa)
Baud rate
(Baud)
Deviation
error
Reload value
(hexa)
5 000 000
0.0% / 0.0%
0000 / 0000
3 333 333
0.0% / 0.0%
0000 / 0000
112 000
+1.5% /0.8%
002B / 002C
112 000
+2.6% /0.8%
001C / 001D
56 000
+0.3% /0.8%
0058 / 0059
56 000
+0.9% /0.8%
003A / 003B
38 400
+0.2% /0.6%
0081 / 0082
38 400
+0.9% /0.2%
0055 / 0056
19 200
+0.2% /0.2%
0103 / 0104
19 200
+0.4% /0.2%
00AC / 00AD
9 600
+0.2% /0.0%
0207 / 0208
9 600
+0.1% /0.2%
015A / 015B
4 800
+0.1% /0.0%
0410 / 0411
4 800
+0.1% /0.1%
02B5 / 02B6
2 400
0.0% / 0.0%
0822 / 0823
2 400
+0.1% /0.0%
056B / 056C
1 200
0.0% / 0.0%
1045 / 1046
1 200
0.0% / 0.0%
0AD8 / 0AD9
900
0.0% / 0.0%
15B2 / 15B3
600
0.0% / 0.0%
15B2 / 15B3
612
0.0% / 0.0%
1FE8 / 1FE9
407
0.0% / 0.0%
1FFD / 1FFE
Note:
The deviation errors given in the Table 29 are rounded. To avoid deviation errors use a Baud
rate crystal (providing a multiple of the ASC0/SSC sampling frequency)
14.2
High speed synchronous serial channel (SSC)
The High-Speed Synchronous Serial Interface SSC provides flexible high-speed serial
communication between the ST10F280 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.
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ST10F280
Serial channels
Figure 58. Synchronous serial channel SSC block diagram
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14.2.1
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 30 lists some possible Baud rates against the required reload values and the resulting
bit times for a 40MHz CPU clock.
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Serial channels
Table 30.
ST10F280
Synchronous baud rate and reload values
Baud rate
Bit time
Reload value
---
---
10M Baud
100ns
0001h
5M Baud
200ns
0003h
2.5M Baud
400ns
0007h
1M Baud
1μs
0013h
100K Baud
10μs
00C7h
10K Baud
100μs
07CFh
1K Baud
1ms
4E1Fh
306 Baud
3.26ms
FF4Eh
Reserved use a reload value > 0.
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15
CAN modules
CAN modules
The two integrated CAN modules (CAN1 and CAN2) are identical and handle the
completely autonomous transmission and reception of CAN frames in accordance with the
CAN specification V2.0 part B (active) i.e. the on-chip CAN module can receive and transmit
standard frames with 11-bit identifiers as well as extended frames with 29-bit identifiers.
Because of duplication of CAN controllers, the following adjustements are to be considered:
●
The same internal register addresses both CAN controllers, but with the base
addresses differing in address bit A8 and separate chip select for each CAN module.
For address mapping, see Chapter 4.
●
The CAN1 transmit line (CAN1_TxD) is the alternate function of the port P4.6 and the
receive line (CAN1_RxD) is P4.5.
●
The CAN2 transmit line (CAN2_TxD) is the alternate function of the port P4.7 and the
receive line (CAN2_RxD) is the alternate function of the port P4.4.
●
Interrupt of CAN2 is connected to the XBUS interrupt line XP1 (CAN1 is on XP0).
●
Because of the new XPERCON register, both CAN modules have to be selected,
before the bit XPEN is set in SYSCON register.
●
After reset, the CAN1 is selected with the related control bit in the XPERCON register.
The CAN2 is not selected.
15.1
Memory mapping
15.1.1
CAN1
Address range 00’EF00h 00’EFFFh is reserved for the CAN1 Module access. The CAN1 is
enabled by setting bit 0 of the new XPERCON register before setting XPEN bit 2 of the
SYSCON register. Accesses to the CAN Module use demultiplexed addresses and a 16-bit
data bus (byte accesses are possible). Two waitstates give an access time of 100 ns at
40MHz CPU clock. No tristate waitstate is used.
15.1.2
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 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 waitstates give an access time of 100 ns at 40MHz CPU
clock. No tristate waitstate is used.
Note:
If one or the two CAN modules are used, Port 4 can not 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 ST10F280 is
able to support these 2 cases.
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CAN modules
15.2.1
ST10F280
Single CAN bus
The single CAN Bus multiple interfaces configuration may be implemented using 2 CAN
transceives as shown in Figure 55.
Figure 59. Single CAN bus multiple interfaces - multiple transceivers
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The ST10F280 also supports single CAN Bus multiple (dual) interfaces using the open drain
option of the CANx_TxD output as shown in Figure 60. 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.
Figure 60. Single CAN bus dual interfaces - single transceiver
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15.2.2
Multiple CAN bus
The ST10F280 provides 2 CAN interfaces to support the kind of bus configuration shown in
Figure 57.
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CAN modules
Figure 61. Connection to two different CAN buses (e.g. for gateway application)
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15.3
Register and message object organization
All registers and message objects of the CAN controller are located in the special CAN
address area of 256 bytes, which is mapped into segment 0 and uses addresses 00’EE00h
through 00’EFFFh. All registers are organized as 16 bit registers, located on word
addresses. However, all registers may be accessed byte wise in order to select special
actions without effecting other mechanisms.
Note:
The address map shown in Figure 58 lists the registers which are part of the CAN controller.
There are also ST10F280 specific registers that are associated with the CAN Module.
These registers, however, control the access to the CAN Module rather than its function.
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CAN modules
ST10F280
Figure 62. CAN module address map
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ST10F280
CAN modules
Control / Status Register
15
14
13
BOFF
EWRN
-
R
R
12
11
10
RXOK TXOK
R/W
R/W
Address:
0xEF00h / 0xEE00h XReg
Reset:
0xXX01h
Type:
R, R/W
7
6
5
4
3
2
1
0
LEC
9
8
TST
CCE
0
0
EIE
SIE
IE
INIT
R/W
R/W
R/W
R
R
R/W
R/W
R/W
R/W
INIT Initialization
1: Software initialization of the CAN controller. While init is set, all message transfers are
stopped. Setting init does not change the configuration registers and does not stop
transmission or reception of a message in progress. The INIT bit is also set by hardware,
following a busoff condition; the CPU then needs to reset INIT to start the bus recovery
sequence.
0: Disable software initialization of the CAN controller; on INI completion, the CAN waits
for 11 consecutive recessive bit before taking part in bus activities.
IE Interrupt Enable Does not affect status updates.
1: Global interrupt enable from CAN module.
0: Global interrupt disable from CAN module.
SIE Status Change Interrupt Enable
1: Enables interrupt generation when a message transfer (reception or transmision is
successfully completed) or CAN bus error is detected and registered in LEC is the status
partition.
0: Disable status change interrupt.
EIE Error Interrupt Enable
1: Enables interrupt generation on a change of bit BOFF or EWARN in the status partition.
0: Disable error interrupt.
CCE Configuration Change Enable
1: Allows CPU access to the bit timing register
0: Disables CPU access to the bit timing register
TST Test Mode (Bit 7)
Make sure that bit 7 is cleared when writing to the Control Register. Writing a 1 during
normal operation may lead erroneous device behaviour.
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CAN modules
ST10F280
LEC Last Error Code
This field holds a code which indicates the type of the last error occurred on the CAN bus.
If a message has been transferred (reception or transmission) without error, this field will
be cleared. Code “7” is unused and may be written by the CPU to check for updates.
0: No Error
1: Stuff Error: More than 5 equal bit in a sequence have occurred in a part of a received
message where this is not allowed.
2: Form Error: A fixed format part of a received frame has the wrong format.
3: AckError: The message this CAN controller transmitted was not acknowledged by
another node
4: Bit1Error: During the transmission of a message (with the exception of the arbitration
field), the device wanted to send a recessive level (“1”), but the monitored bus value was
dominant
5: Bit0Error: During the transmission of a message (or acknowledge bit, active error flag,
or overload flag), the device wanted to send a dominant level (“0”), but the monitored bus
value was recessive. During busoff recovery this status is set each time a sequence of 11
recessive bit has been monitored. This enables the CPU to monitor the proceeding of the
busoff recovery sequence (indicating the bus is not stuck at dominant or continuously
disturbed).
6: CRCError: The CRC check sum was incorrect in the message received.
TXOK Transmitted Message Successfully
Indicates that a message has been transmitted successfully (error free and acknowledged
by at least one other node), since this bit was last reset by the CPU (the CAN controller
does not reset this bit!).
RXOK Received Message Successfully
Indicates that a message has been received successfully, since this bit was last reset by
the CPU (the CAN controller does not reset this bit!).
EWRN Error Warning Status
Indicates that at least one of the error counters in the EML has reached the error warning
limit of 96.
BOFF Busoff Status
Indicates when the CAN controller is in busoff state (see EML).
Note:
Reading the upper half of the Control Register (status partition) will clear the Status Change
Interrupt value in the Interrupt Register, if it is pending. Use byte accesses to the lower half
to avoid this.
15.4
CAN interrupt handling
The on-chip CAN Module has one interrupt output, which is connected (through a
synchronization stage) to a standard interrupt node in the ST10F280 in the same manner as
all other interrupts of the standard on-chip peripherals. The control register for this interrupt
is XP0IC (located at address F186h/C3h for CAN1 and F18Eh/C7h for CAN2 in the ESFR
range). The associated interrupt vector is called XP0INT at location 100h (trap number 40h)
and XP1INT at location 104h (trap number 41h). With this configuration, the user has all
control options available for this interrupt, such as enabling/disabling, level and group
priority, and interrupt or PEC service (see note below).
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CAN modules
As for all other interrupts, the interrupt request flag XP0IR/XP1IR in register XP0IC/XP1IC is
cleared automatically by hardware when this interrupt is serviced (either by standard
interrupt or PEC service).
Note:
As a rule, CAN interrupt requests can be serviced by a PEC channel. However, because
PEC channels only can execute single predefined data transfers (there are no conditional
PEC transfers), PEC service can only be used, if the respective request is known to be
generated by one specific source, and that no other interrupt request will be generated in
between. In practice this seems to be a rare case.
Since an interrupt request of the CAN Module can be generated due to different conditions,
the appropriate CAN interrupt status register must be read in the service routine to
determine the cause of the interrupt request. The Interrupt Identifier INTID (a number) in the
Interrupt Register indicates the cause of an interrupt. When no interrupt is pending, the
identifier will have the value 00h. If the value in INTID is not 00h, then there is an interrupt
pending. If bit IE in the Control Register is set, also the interrupt line to the CPU is activated.
The interrupt line remains active until either INTID gets 00h (after the interrupt requester has
been serviced) or until IE is reset (if interrupts are disabled).
The interrupt with the lowest number has the highest priority. If a higher priority interrupt
(lower number) occurs before the current interrupt is processed, INTID is updated and the
new interrupt overrides the last one. The Table 31 lists the valid values for INTID and their
corresponding interrupt sources.
Interrupt Register
15
14
13
12
11
10
9
8
7
6
5
Reserved
4
3
2
1
0
INTID
R
Address:
0xEF02h / 0xEE02h XReg
Reset:
0x--XXh
Type:
R
INTID Interrupt Identifier
This number indicates the cause of the interrupt. When no interrupt is pending, the value will
be “00”.
Table 31.
INTID
INTID values and corresponding interrupt sources
Cause of the Interrupt
00
Interrupt Idle: There is no interrupt request pending.
01
Status Change Interrupt: The CAN controller has updated (not necessarily changed) the
status in the Control Register. This can refer to a change of the error status of the CAN
controller (EIE is set and BOFF or EWRN change) or to a CAN transfer incident (SIE must
be set), like reception or transmission of a message (RXOK or TXOK is set) or the
occurrence of a CAN bus error (LEC is updated). The CPU may clear RXOK, TXOK, and
LEC, however, writing to the status partition of the Control Register can never generate or
reset an interrupt. To update the INTID value the status partition of the Control Register
must be read.
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CAN modules
ST10F280
Table 31.
INTID values and corresponding interrupt sources (continued)
INTID
Cause of the Interrupt
02
Message 15 Interrupt: Bit INTPND in the Message Control Register of message object 15
(last message) has been set. The last message object has the highest interrupt priority of
all message objects. 1) (1)
(2+N)
Message N Interrupt: Bit INTPND in the Message Control Register of message object ‘N’
has been set (N = 1...14). (1)(2)
1. Bit INTPND of the corresponding message object has to be cleared to give messages with a lower priority
the possibility to update INTID or to reset INTID to 00h (idle state).
2. A message interrupt code is only displayed, if there is no other interrupt request with a higher priority.
15.4.1
Bit timing configuration
According to the CAN protocol specification, a bit time is subdivided into four segments:
Sync segment, propagation time segment, phase buffer segment 1 and phase buffer
segment 2.
Each segment is a multiple of the time quantum tq with tq = ( BRP + 1 ) x 2 x tXCLK
The Synchronization Segment (Sync seg) is always 1 tq long. The Propagation Time
Segment and the Phase Buffer Segment1 (combined to Tseg1) defines the time before the
sample point, while Phase Buffer Segment2 (Tseg2) defines the time after the sample point.
The length of these segments is programmable (except Sync-Seg).
Note:
For exact definition of these segments please refer to the CAN Specification.
Figure 63. Bit timing definition
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CAN modules
Bit Timing Register
15
14
13
12
11
10
9
8
7
6
5
4
3
2
0
TSEG2
TSEG1
SJW
BRP
R
R/W
R/W
R/W
R/W
Address:
0xEF04h / EE04h XReg
Reset:
0xUUUUh
Type:
R, R/W
1
0
BRP Baud Rate Prescaler
For generating the bit time quanta the CPU frequency is divided by 2 x (BRP+1).
SJW (Re)Synchronization Jump Width
Adjust the bit time by maximum (SJW+1) time quanta for re-synchronization.
TSEG1 Time Segment before sample point
There are (TSEG1+1) time quanta before the sample point. Valid values for TSEG1
are “2...15”.
TSEG2 Time Segment after sample point
There are (TSEG2+1) time quanta after the sample point. Valid values for TSEG2 are
“1...7”.
Note:
This register can only be written, if the configuration change enable bit (CCE) is set.
15.4.2
Mask registers
Messages can use standard or extended identifiers. Incoming frames are masked with their
appropriate global masks. Bit IDE of the incoming message determines whether the
standard 11 bit mask in Global Mask Short or the 29 bit extended mask in Global Mask Long
is to be used. Bit holding a “0” mean “don’t care”, so do not compare the message’s
identifier in the respective bit position.
The last message object (15) has an additional individually programmable acceptance mask
(Mask of Last Message) for the complete arbitration field. This allows classes of messages
to be received in this object by masking some bits of the identifier.
Note:
The Mask of Last Message is ANDed with the Global Mask that corresponds to the
incoming message.
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CAN modules
ST10F280
Global Mask Short
15
12
11
10
9
8
ID20...18
14
13
1
1
1
1
1
ID28...21
R/W
R
R
R
R
R
R/W
Address:
0xEF06h / EE06h XReg
Reset:
0xUFUUh
Type:
R, R/W
7
6
5
4
3
2
1
0
2
1
0
2
1
0
ID28...18 Identifier (11 Bit)
Mask to filter incoming messages with standard identifier.
Upper Global Mask Long
15
14
13
12
11
10
9
8
7
6
5
4
3
ID20...13
ID28...21
R/W
R/W
Address:
0xEF08h / EE08h XReg
Reset:
0xUUUUh
Type:
R/W
Lower Global Mask Long
15
14
10
9
8
ID4...0
13
12
11
0
0
0
ID12...5
R/W
R
R
R
R/W
Address:
0xEF0Ah / EE0Ah XReg
Reset:
0xUUUUh
Type:
R, R/W
7
6
5
4
ID28...0 Identifier (29 bit)
Mask to filter incoming messages with extended identifier.
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ST10F280
CAN modules
Upper Mask of Last Message
15
14
13
12
11
10
9
8
7
6
5
4
3
ID20...18
ID17...13
ID28...21
R/W
R/W
R/W
Address:
0xEF0Ch / EE0Ch XReg
Reset:
0xUUUUh
Type:
R/W
2
1
0
2
1
0
Lower Mask of Last Message
15
14
10
9
8
ID4...0
13
12
11
0
0
0
ID12...5
R/W
R
R
R
R/W
Address:
0xEF0Eh / EE0Eh XReg
Reset:
0xUUUUh
Type:
R, R/W
7
6
5
4
3
ID28...0 Identifier (29 bit)
Mask to filter the last incoming message (Nr. 15) with standard or extended identifier (as
configured).
15.5
The message object
The message object is the primary means of communication between CPU and CAN
controller. Each of the 15 message objects uses 15 consecutive bytes (see Figure 60) and
starts at an address that is a multiple of 16.
Note:
All message objects must be initialized by the CPU, even those which are not going to be
used, before clearing the INIT bit.
Each element of the Message Control Register is made of two complementary bits.
This special mechanism allows the selective setting or resetting of specific elements
(leaving others unchanged) without requiring read-modify-write cycles. None of these
elements will be affected by reset.
The Table 32 shows how to use and to interpret these 2 bit-fields.
Doc ID 8673 Rev. 3
165/239
CAN modules
ST10F280
Figure 64. Message object address map
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Table 32.
Functions of complementary bit of message control register
Value
166/239
Function on write
Meaning on read
00
Reserved
Reserved
01
Reset element
Element is reset
10
Set element
Element is set
11
Leave element unchanged
Reserved
Doc ID 8673 Rev. 3
ST10F280
CAN modules
Message Control Register
15
14
13
12
11
10
RMTPND
TXRQ
MSGLST
CPUUPD
R/W
R/W
R/W
Address:
0xEFn0h / EEn0h XReg
Reset:
0xUUUUh
Type:
R/W
9
8
7
6
5
4
3
2
1
0
NEWDAT
MSGVAL
TXIE
RXIE
INTPND
R/W
R/W
R/W
R/W
R/W
INTPND Interrupt Pending
Indicates, if this message object has generated an interrupt request (see TXIE and
RXIE), since this bit was last reset by the CPU, or not.
RXIE Receive Interrupt Enable
Defines, if bit INTPND is set after successful reception of a frame.
TXIE Transmit Interrupt Enable
Defines, if bit INTPND is set after successful transmission of a frame.(1)
MSGVAL Message Valid
Indicates, if the corresponding message object is valid or not. The CAN controller only
operates on valid objects. Message objects can be tagged invalid, while they are
changed, or if they are not used at all.
NEWDAT New Data
Indicates, if new data has been written into the data portion of this message object by
CPU (transmit-objects) or CAN controller (receive-objects) since this bit was last
reset, or not.(2)
MSGLST Message Lost (This bit applies to receive-objects only)
(Receive) Indicates that the CAN controller has stored a new message into this object, while
NEWDAT was still set, i.e. the previously stored message is lost.
CPUUPD CPU Update (This bit applies to transmit-objects only)
(Transmit) Indicates that the corresponding message object may not be transmitted now. The
CPU sets this bit in order to inhibit the transmission of a message that is currently
updated, or to control the automatic response to remote requests.
TXRQ Transmit Request
Indicates that the transmission of this message object is requested by the CPU or via
a remote frame and is not yet done. TXRQ can be disabled by CPUUPD. (1) (3)
RMTPND Remote Pending (Used for transmit-objects)
Indicates that the transmission of this message object has been requested by a
remote node, but the data has not yet been transmitted. When RMTPND is set, the
CAN controller also sets TXRQ. RMTPND and TXRQ are cleared, when the message
object has been successfully transmitted.
1. In message object 15 (last message) these bits are hardwired to “0” (inactive) in order to prevent
transmission of message 15.
2. When the CAN controller writes new data into the message object, unused message bytes will be
overwritten by non specified values. Usually the CPU will clear this bit before working on the data, and
verify that the bit is still cleared once it has finished working to ensure that it has worked on a consistent set
of data and not part of an old message and part of the new message.
For transmit-objects the CPU will set this bit along with clearing bit CPUUPD. This will ensure that, if the
message is actually being transmitted during the time the message was being updated by the CPU, the
CAN controller will not reset bit TXRQ. In this way bit TXRQ is only reset once the actual data has been
transferred.
Doc ID 8673 Rev. 3
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CAN modules
ST10F280
3. When the CPU requests the transmission of a receive-object, a remote frame will be sent instead of a data
frame to request a remote node to send the corresponding data frame. This bit will be cleared by the CAN
controller along with bit RMTPND when the message has been successfully transmitted, if bit NEWDAT
has not been set. If there are several valid message objects with pending transmission request, the
message with the lowest message number is transmitted first.
15.6
Arbitration Registers
The arbitration Registers are used for acceptance filtering of incoming messages and to
define the identifier of outgoing messages.
Upper Arbitration Reg
15
14
13
12
11
10
9
8
7
6
5
4
3
ID20...18
ID17...13
ID28...21
R/W
R/W
R/W
Address:
0xEFn2h / EEn2h XReg
Reset:
0xUUUUh
Type:
R/W
2
1
0
2
1
0
Lower Arbitration Reg
15
14
10
9
8
ID4...0
13
12
11
0
0
0
ID12...5
R/W
R
R
R
R/W
Address:
0xEFn4h / EEn4h XReg
Reset:
0xUUUUh
Type:
R, R/W
7
6
5
4
3
ID28...0 Identifier (29 bit) Identifier of a standard message (ID28...18) or an extended
message (ID28...0). For standard identifiers bit ID17...0 are “don’t care”.
168/239
Doc ID 8673 Rev. 3
ST10F280
16
Watchdog timer
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 bit are cleared with the EINIT instruction. The origine of the reset can be
identified during the initialization phase.
WDTCON
15
14
13
12
11
10
WDTREL
9
8
7
6
5
4
3
2
1
0
-
-
PONR
LHWR
SHWR
SWR
WDTR
WDTIN
R
R
R
R
R
R/W
R/W
Address:
0xFFAEh / D7h SFR
Reset:
0x00XXh
Type:
R, R/W
WDTIN Watchdog Timer Input Frequency Selection
0: Input Frequency is fCPU/2.
1: Input Frequency is fCPU/128.
WDTR(1) Watchdog Timer Reset Indication Flag
Set by the watchdog timer on an overflow.
Cleared by a hardware reset or by the SRVWDT instruction.
SWR(1) Software Reset Indication Flag
Set by the SRST execution.
Cleared by the EINIT instruction.
SHWR(1) Short Hardware Reset Indication Flag
Set by the input RSTIN.
Cleared by the EINIT instruction.
LHWR(1) Long Hardware Reset Indication Flag
Set by the input RSTIN.
Cleared by the EINIT instruction.
PONR(1)(2) Power-On (Asynchronous) Reset Indication Flag
Set by the input RSTIN if a power-on condition has been detected.
Cleared by the EINIT instruction.
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 Vcc = 0 V to Vcc > 2.0 V is recognized.
Doc ID 8673 Rev. 3
169/239
Watchdog timer
ST10F280
The PONR flag of WDTCON register is set if the output voltage of the internal 3.3V 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 3.3V 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 33.
WDTCON bits value on different resets
Reset source
PONR
LHWR
SHWR
SWR
Power On Reset
X
X
X
X
Power on after partial supply
failure
1
X
X
X
X
X
X
X
X
Long Hardware Reset
Short Hardware Reset
Software Reset
X
Watchdog Reset
X
WDTR
X
Note:
1. PONR bit may not be set for short supply failure.
Note:
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 34 shows the watchdog time range for 40MHz CPU clock.
Table 34.
WDTREL reload value
Prescaler for fCPU = 40MHz
Reload value in WDTREL
2 (WDTIN = ‘0’)
128 (WDTIN = ‘1’)
FFh
12.8μs
819.2ms
00h
3.276ms
209.7ms
The watchdog timer period is calculated with the following formula:
P
170/239
WDT
1
= --------------- × 512 × ( 1 + [ WDTIN ] × 63 ) × ( 256 – [ WDTREL ] )
f CPU
Doc ID 8673 Rev. 3
ST10F280
17
System reset
System reset
Table 35.
Reset event definition
Reset source
Short-cut
Conditions
Power-on reset
PONR
Power-on
Long Hardware reset (synchronous & asynchronous)
LHWR
t RSTIN > 1032 TCL
Short Hardware reset (synchronous reset)
SHWR
4 TCL < t RSTIN < 1032 TCL
Watchdog Timer reset
WDTR
WDT overflow
Software reset
SWR
SRST execution
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 35.
17.1
Asynchronous reset (long hardware reset)
An asynchronous reset is triggered when RSTIN pin is pulled low while RPD pin is at low
level. Then the MCU is immediately forced in reset default state. It pulls low RSTOUT pin, it
cancels pending internal hold states if any, it waits for any internal access cycles to finish, 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.
17.1.1
Power-on reset
The asynchronous reset must be used during the power-on of the MCU. Depending on
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.
17.1.2
Hardware reset
The asynchronous reset must be used to recover from catastrophic situations of the
application. It may be triggerred by the hardware of the application. Internal hardware logic
and application circuitry are described in Reset circuitry chapter and Figure 68, Figure 69
and Figure 66.
17.1.3
Exit of asynchronous reset state
When the RSTIN pin is pulled high, the MCU restarts. The system configuration is latched
from PORT0 and 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. Timing of asynchronous reset
sequence are summarized in Figure 61.
Doc ID 8673 Rev. 3
171/239
System reset
ST10F280
Figure 65. Asynchronous reset timing
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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) .
17.2
Synchronous reset (warm reset)
A synchronous reset is triggered when RSTIN pin is pulled low while RPD pin is at high
level. In order 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 (approximately 6 periods of CPU clock) elapes, 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 a reset sequence.
17.2.1
Exit of synchronous reset state
The internal reset sequence starts for 1024 TCL (512 periods of CPU clock) and RSTIN pin
level is sampled. The reset sequence is extended until RSTIN level becomes high. Then, the
MCU restarts. The system configuration is latched from PORT0 and 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. Timing of synchronous reset sequence are summarized in Figure 66
and Figure 67.
172/239
Doc ID 8673 Rev. 3
ST10F280
System reset
Figure 66. Synchronous warm reset (short low pulse on RSTIN)
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1. RSTIN assertion can be released there.
2. If during the reset condition (RSTIN low), VRPD voltage drops below the threshold voltage (about 2.5V for
5V operation), the asynchronous reset is then immediately entered.
3. 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).
4. RSTIN pin is pulled low if bit BDRSTEN (bit 5 of SYSCON register) was previously set by software. Bit
BDRSTEN is cleared after reset.
Doc ID 8673 Rev. 3
173/239
System reset
ST10F280
Figure 67. Synchronous warm reset (long low pulse on RSTIN)
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1. RSTIN rising edge to internal latch of PORT0 is 3 CPU (6 TCL) clock cycles if the PLL is bypassed and the
prescaler is on (fCPU = fXTAL / 2), else it is 4 CPU clock cycles (8 TCL).
2. If during the reset condition (RSTIN low), VRPD voltage drops below the threshold voltage (about 2.5V for
5V operation), the asynchronous reset is then immediately entered.
3. RSTIN pin is pulled low if bit BDRSTEN (bit 5 of SYSCON register) was previously set by soft-ware. Bit
BDRSTEN is cleared after reset.
17.3
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 behaviour is the same as for a Short Hardware reset, except that only
P0.12...P0.6 bit are latched at the end of the reset sequence, while P0.5...P0.2 bit are
cleared.
17.4
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.
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 is
started. At the end of the internal reset sequence (1024 TCL), only P0.12...P0.6 bit are
latched, while previously latched values of P0.5...P0.2 are cleared.
174/239
Doc ID 8673 Rev. 3
ST10F280
17.5
System reset
RSTOUT pin and bidirectional reset
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.
The Bidirectional Reset function is useful when external devices require a reset signal but
cannot be connected to RSTOUT pin, because RSTOUT signal lasts during initialisation. It
is, for instance, the case of external memory running initialization routine before the
execution of EINIT instruction.
Bidirectional reset function is enabled by setting bit 3 (BDRSTEN) in SYSCON register. It
only can be enabled during the initialization routine, before EINIT instruction is completed.
When enabled, the open drain of the RSTIN pin is activated, pulling down the reset signal,
for the duration of the internal reset sequence (synchronous/asynchronous hardware,
software and watchdog timer resets). At the end of the internal reset sequence the pull
down is released and the RSTIN pin is sampled 8 TCL periods later.
●
If signal is sampled low, a hardware reset is triggered again.
●
If it is sampled high, the chip exits reset state according to the running reset way
(synchronous/asynchronous hardware, software and watchdog timer resets ).
Note:
The bidirectional reset function is disabled by any reset sequence (Bit BDRSTEN of
SYSCON is cleared). To be activated again it must be enabled during the initialization
routine.
17.6
Reset circuitry
The internal reset circuitry is described in Figure 68.
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 (bit BDRSTEN of SYSCON register) drives the RSTIN pin
according to the internal reset state as explained in Section 17.5: RSTOUT pin and
bidirectional reset.
The RSTOUT pin provides a signals to the application as described in Section 17.5:
RSTOUT pin and 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 Bidirectional Reset function is not used, the simplest way to reset ST10F280 is to connect
external components as shown in Figure 69. 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.
The R0-C0 components on RPD pin are mainly implemented to provide a time delay to exit
Power down mode (see Chapter 18: Power reduction modes). Nervertheless, they drive
RPD pin level during resets and they lead to different reset modes as explained hereafter.
On power-on, C0 is totaly discharged, a low level on RPD pin forces an asynchronous
Doc ID 8673 Rev. 3
175/239
System reset
ST10F280
hardware reset. C0 capacitor starts to charge throught R0 and at the end of reset sequence
ST10F280 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 17.1: Asynchronous reset (long
hardware reset) and Section 17.2: Synchronous reset (warm 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.
In order to properly use the Bidirectional reset features, the schematic (or equivalent) of
Figure 66 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 and Table 37.
Table 36 describes what is the system configuration latched on PORT0 in the five different
reset ways. Table 37 summarizes the bit state of PORT0 latched in RP0H, SYSCON,
BUSCON0 registers. RPOH register is described in Section 19.2: System configuration
registers.
176/239
Doc ID 8673 Rev. 3
ST10F280
System reset
Figure 68. Internal (simplified) reset circuitry
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177/239
System reset
ST10F280
Figure 70. External reset hardware circuitry
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Table 36.
PORT0 latched configuration for the different resets
Reserved
BSL
Reserved
Reserved
Adapt Mode
Emu Mode
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
-
-
-
X
X
X
X
X
X
X
-
-
-
-
-
-
Watchdog Reset
-
-
-
X
X
X
X
X
X
X
-
-
-
-
-
-
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
Sample event
Doc ID 8673 Rev. 3
Bus Type
- : Pin is not
sampled
WR config.
P0H.5
Chip Selects
P0H.6
Clock Options
P0H.7
Software Reset
X : Pin is sampled
178/239
Segm. Addr. Lines
PORT0
ST10F280
System reset
X(2)
X(2)
Internal
logic
To clock
generator
-
To Port 4
logic
To Port 6
logic
-
R
EMU
BUSCON0
X(2) X(2)
X(2)
R
WRC
X(2) X(2) X(2)
I1
I0
X(2)
X(2) X(2) X(2) X(2) X(2) X(2)
X(2) X(2) X(2) X(2) X(2) X(2)
X(2) X(2) X(2)
X(2)
X(2) X(2)
Internal
X(2)
R
ADP
WRC
SYSCON
X(2) X(2)
I2
CSSEL
CSSEL
X(2) X(2) X(2)
I3
Internal
CSSEL
X(2)
BUS ACT0 (4)
X(2) X(2)
I4
CSSEL
SALSEL
(1)
I5
SALSEL
SALSEL
X(2)
RP0H
I6
BSL
CLKCFG
X(2)
PORT0
bit
Name
I7
SALSEL
h0
Internal
h1
CLKCFG
h2
CLKCFG BUSTYP
h3
BTYP
h4
WRCFG (3) CLKCFG BUSTYP
h5
BTYP
h6
ALE CTL0 (4) BYTDIS (3)
PORT0
bit
h7
nber
CLKCFG
PORT0 bit latched into the different registers after reset
CLKCFG
Table 37.
1. Only RP0H low byte is used and the bit-fields are latched from PORT0 high byte to RP0H low byte.
2. Not latched from PORT0.
3. Indirectly depend on PORT0.
4. Bits set if EA pin is 1.
Doc ID 8673 Rev. 3
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Power reduction modes
18
ST10F280
Power reduction modes
Two different power reduction modes with different levels of power reduction have been
implemented in the ST10F280, which may be entered under software control.
In Idle mode the CPU is stopped, while the peripherals continue their operation. Idle mode
can be terminated by any reset or interrupt request.
In Power Down mode both the CPU and the peripherals are stopped. Power Down mode
can now be configured by software in order to be terminated only by a hardware reset or by
a transition on enabled fast external interrupt pins.
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.
18.1
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 keeps 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.
18.2
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 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.
180/239
Doc ID 8673 Rev. 3
ST10F280
Power reduction modes
12
11
10
9
8
7
6
5
4
3
2
STKSZ
SGTDIS
ROMEN
BYTDIS
CLKEN
WRCFG
CSCFG
PWDCFG
OWDDIS
BDRSTEN
XPEN
VISIBLE
XPER-SHARE
15
ROMS1
SYSCON
14
13
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xFF12H / 89h SFR
Reset:
0x0XX0h
Type:
R/W
1
0
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 FastExternal Interrupt (EXxIN) pins are in their inactive level. Exiting this mode
can be done by asserting one enabled EXxIN pin.
Note:
Register SYSCON cannot be changed after execution of the EINIT instruction.
18.2.1
Protected power down mode
This mode is selected by clearing the bit PWDCFG in register SYSCON to ‘0’.
In this mode, the Power Down mode can only be entered if the NMI (Non Maskable
Interrupt) pin is externally pulled low while the PWRDN instruction is executed.
This feature can be used in conjunction with an external power failure signal which pulls the
NMI pin low when a power failure is imminent. The microcontroller will enter the NMI trap
routine which can save the internal state into RAM. After the internal state has been saved,
the trap routine may set a flag or write a certain bit pattern into specific RAM locations, and
then execute the PWRDN instruction. If the NMI pin is still low at this time, Power Down
mode will be entered, otherwise program execution continues. During power down the
voltage delivered by the on-chip voltage regulator automatically lowers the internal logic
supply down to 2.5 V, saving the power while the contents of the internal RAM and all
registers will still be preserved.
Exiting power down mode
In this mode, the only way to exit Power Down mode is with an external hardware reset.
The initialization routine (executed upon reset) can check the identification flag or bit pattern
within RAM to determine whether the controller was initially switched on, or whether it was
properly restarted from Power Down mode.
18.2.2
Interruptable power down mode
This mode is selected by setting the bit PWDCFG in register SYSCON to ‘1’.
Doc ID 8673 Rev. 3
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Power reduction modes
ST10F280
In this mode, the Power Down mode can be entered if enabled Fast External Interrupt pins
(EXxIN pins, alternate functions of Port 2 pins, with x = 7...0) are in their inactive level. This
inactive level is configured with the EXIxES bit field in the EXICON register, as follow:
EXICON (F1C0h / E0h)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
EXI7ES
EXI6ES
EXI5ES
EXI4ES
EXI3ES
EXI2ES
EXI1ES
EXI0ES
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xF1C0H / E0h ESFR
Reset:
0x000h
Type:
R/W
EXIxES (x=7...0) External Interrupt x Edge Selection Field (x=7...0)
00: Fast external interrupts disabled: standard mode
EXxIN pin not taken in account for entering/exiting Power Down mode.
Interrupt on positive edge (rising)
01: Enter Power Down mode if EXiIN = ‘0’, exit if EXxIN = ‘1’ (referred as ‘high’
active level)
10: Interrupt on negative edge (falling)
Enter Power Down mode if EXiIN = ‘1’, exit if EXxIN = ‘0’ (referred as ‘low’ active
level)
11: Interrupt on any edge (rising or falling)
Always enter Power Down mode, exit if EXxIN level changed.
Exiting power down mode
When Power Down mode is entered, the CPU and peripheral clocks are frozen, and the
oscillator and PLL are stopped. Power Down mode can be exited by either asserting RSTIN
or one of the enabled EXxIN pin (Fast External Interrupt).
RSTIN must be held low until the oscillator and PLL have stabilized.
EXxIN inputs are normally sampled interrupt inputs. However, the Power Down mode
circuitry uses them as level-sensitive inputs. An EXxIN (x = 7...0) Interrupt Enable bit (bit
CCxIE in respective CCxIC register) need not to be set to bring the device out of Power
Down mode. An external RC circuit must be connected, as shown in the following figure:
182/239
Doc ID 8673 Rev. 3
ST10F280
Power reduction modes
Figure 71. External RC circuit on RPD pin for exiting power down mode with
external interrupt
9''
67)
5
N:0:7\SLFDO
53'
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("1($'5
To exit Power Down mode with external interrupt, an EXxIN pin has to be asserted for at
least 40 ns (x = 7...0). This signal enables the internal oscillator and PLL circuitry, and also
turns on the weak pull-down (see following figure). The discharging 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 Vpp voltage drops below the threshold
voltage (about 2.5 V), the Schmitt trigger clears Q2 flip-flop, thus enabling the CPU and
Peripheral clocks, and the device resumes code execution.
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:
Due to 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.
Doc ID 8673 Rev. 3
183/239
Power reduction modes
ST10F280
Figure 72. Simplified power down exit circuitry
9''
' 4
4
FG4
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3RZHU'RZQ
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9''
3XOOXS
53'
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FG4
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Figure 73. Power down exit sequence when using an external interrupt (PLL x 2)
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&38FON
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184/239
Doc ID 8673 Rev. 3
ST10F280
19
Special function register overview
Special function register overview
The following table lists all SFRs which are implemented in the ST10F280 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”.
An SFR can be specified by its individual mnemonic name. Depending on the selected
addressing mode, an 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 bit of the nibble are not defined at reset.
Table 38.
Name
Special function registers listed by name
Physical
address
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
ADDAT
FEA0h
50h
A/D Converter Result Register
0000h
ADDAT2
F0A0h E
50h
A/D Converter 2 Result Register
0000h
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
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
b FF78h
BCh
CAPCOM Register 0 Interrupt Control Register
- - 00h
FE82h
41h
CAPCOM Register 1
0000h
b FF7Ah
BDh
CAPCOM Register 1 Interrupt Control Register
- - 00h
FE84h
42h
CAPCOM Register 2
0000h
b FF7Ch
BEh
CAPCOM Register 2 Interrupt Control Register
- - 00h
CC0IC
CC1
CC1IC
CC2
CC2IC
Doc ID 8673 Rev. 3
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Special function register overview
Table 38.
Name
CC3
CC3IC
CC4
CC4IC
CC5
CC5IC
CC6
CC6IC
CC7
CC7IC
CC8
CC8IC
CC9
CC9IC
CC10
CC10IC
CC11
CC11IC
CC12
CC12IC
CC13
CC13IC
CC14
CC14IC
CC15
CC15IC
CC16
CC16IC
CC17
CC17IC
CC18
CC18IC
CC19
CC19IC
186/239
ST10F280
Special function registers listed by name (continued)
Physical
address
8-bit
address
Description
Reset
value
FE86h
43h
CAPCOM Register 3
0000h
b FF7Eh
BFh
CAPCOM Register 3 Interrupt Control Register
- - 00h
FE88h
44h
CAPCOM Register 4
0000h
b FF80h
C0h
CAPCOM Register 4 Interrupt Control Register
- - 00h
FE8Ah
45h
CAPCOM Register 5
0000h
b FF82h
C1h
CAPCOM Register 5 Interrupt Control Register
- - 00h
FE8Ch
46h
CAPCOM Register 6
0000h
b FF84h
C2h
CAPCOM Register 6 Interrupt Control Register
- - 00h
FE8Eh
47h
CAPCOM Register 7
0000h
b FF86h
C3h
CAPCOM Register 7 Interrupt Control Register
- - 00h
FE90h
48h
CAPCOM Register 8
0000h
b FF88h
C4h
CAPCOM Register 8 Interrupt Control Register
- - 00h
FE92h
49h
CAPCOM Register 9
0000h
b FF8Ah
C5h
CAPCOM Register 9 Interrupt Control Register
- - 00h
FE94h
4Ah
CAPCOM Register 10
0000h
b FF8Ch
C6h
CAPCOM Register 10 Interrupt Control Register
- - 00h
FE96h
4Bh
CAPCOM Register 11
0000h
b FF8Eh
C7h
CAPCOM Register 11 Interrupt Control Register
- - 00h
FE98h
4Ch
CAPCOM Register 12
0000h
b FF90h
C8h
CAPCOM Register 12 Interrupt Control Register
- - 00h
FE9Ah
4Dh
CAPCOM Register 13
0000h
b FF92h
C9h
CAPCOM Register 13 Interrupt Control Register
- - 00h
FE9Ch
4Eh
CAPCOM Register 14
0000h
b FF94h
CAh
CAPCOM Register 14 Interrupt Control Register
- - 00h
FE9Eh
4Fh
CAPCOM Register 15
0000h
b FF96h
CBh
CAPCOM Register 15 Interrupt Control Register
- - 00h
FE60h
30h
CAPCOM Register 16
0000h
b F160h E
B0h
CAPCOM Register 16 Interrupt Control Register
- - 00h
FE62h
31h
CAPCOM Register 17
0000h
b F162h E
B1h
CAPCOM Register 17 Interrupt Control Register
- - 00h
FE64h
32h
CAPCOM Register 18
0000h
b F164h E
B2h
CAPCOM Register 18 Interrupt Control Register
- - 00h
FE66h
33h
CAPCOM Register 19
0000h
b F166h E
B3h
CAPCOM Register 19 Interrupt Control Register
- - 00h
Doc ID 8673 Rev. 3
ST10F280
Special function register overview
Table 38.
Name
CC20
Special function registers listed by name (continued)
Physical
address
8-bit
address
Description
Reset
value
FE68h
34h
CAPCOM Register 20
0000h
b F168h E
B4h
CAPCOM Register 20 Interrupt Control Register
- - 00h
FE6Ah
35h
CAPCOM Register 21
0000h
b F16Ah E
B5h
CAPCOM Register 21 Interrupt Control Register
- - 00h
FE6Ch
36h
CAPCOM Register 22
0000h
b F16Ch E
B6h
CAPCOM Register 22 Interrupt Control Register
- - 00h
FE6Eh
37h
CAPCOM Register 23
0000h
b F16Eh E
B7h
CAPCOM Register 23 Interrupt Control Register
- - 00h
FE70h
38h
CAPCOM Register 24
0000h
b F170h E
B8h
CAPCOM Register 24 Interrupt Control Register
- - 00h
FE72h
39h
CAPCOM Register 25
0000h
b F172h E
B9h
CAPCOM Register 25 Interrupt Control Register
- - 00h
FE74h
3Ah
CAPCOM Register 26
0000h
b F174h E
BAh
CAPCOM Register 26 Interrupt Control Register
- - 00h
FE76h
3Bh
CAPCOM Register 27
0000h
b F176h E
BBh
CAPCOM Register 27 Interrupt Control Register
- - 00h
FE78h
3Ch
CAPCOM Register 28
0000h
b F178h E
BCh
CAPCOM Register 28 Interrupt Control Register
- - 00h
FE7Ah
3Dh
CAPCOM Register 29
0000h
b F184h E
C2h
CAPCOM Register 29 Interrupt Control Register
- - 00h
FE7Ch
3Eh
CAPCOM Register 30
0000h
b F18Ch E
C6h
CAPCOM Register 30 Interrupt Control Register
- - 00h
FE7Eh
3Fh
CAPCOM Register 31
0000h
CC31IC
b F194h E
CAh
CAPCOM Register 31 Interrupt Control Register
- - 00h
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
b FF6Ah
B5h
GPT2 CAPREL Interrupt Control Register
- - 00h
CC20IC
CC21
CC21IC
CC22
CC22IC
CC23
CC23IC
CC24
CC24IC
CC25
CC25IC
CC26
CC26IC
CC27
CC27IC
CC28
CC28IC
CC29
CC29IC
CC30
CC30IC
CC31
CP
CRIC
Doc ID 8673 Rev. 3
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Special function register overview
Table 38.
Name
188/239
ST10F280
Special function registers listed by name (continued)
Physical
address
8-bit
address
Description
Reset
value
CSP
FE08h
04h
CPU Code Segment Pointer Register (read only)
0000h
DP0L
b 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
DP1H
b F106h E
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
EXICON
b F1C0h E
E0h
External Interrupt Control Register
0000h
EXISEL
b F1DAh E
EDh
External Interrupt Source Selection Register
0000h
IDCHIP
F07Ch E
3Eh
Device Identifier Register (n is the device
revision)
118nh
IDMANUF
F07Eh E
3Fh
Manufacturer Identifier Register
0401h
IDMEM
F07Ah E
3Dh
On-chip Memory Identifier Register
3080h
IDPROG
F078h E
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
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
Doc ID 8673 Rev. 3
ST10F280
Special function register overview
Table 38.
Name
Special function registers listed by name (continued)
Physical
address
8-bit
address
Description
Reset
value
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)
- - 00h
P5
b FFA2h
D1h
Port 5 Register (read only)
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
XXXXh
POCON0L
F080h E
40h
PORT0 Low Output 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)
- - 00h
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
Doc ID 8673 Rev. 3
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Special function register overview
Table 38.
Name
Special function registers listed by name (continued)
Physical
address
8-bit
address
Description
Reset
value
PECC6
FECCh
66h
PEC Channel 6 Control Register
0000h
PECC7
FECEh
67h
PEC Channel 7 Control Register
0000h
PICON
b F1C4h E
E2h
Port Input Threshold Control Register
- - 00h
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
PWMCON0 b FF30h
98h
PWM Module Control Register 0
0000h
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
RP0H
b F108h E
84h
System Start-up Configuration Register (read
only)
- - XXh
S0BG
FEB4h
5Ah
Serial Channel 0 Baud Rate Generator Reload
Register
0000h
S0CON
b FFB0h
D8h
Serial Channel 0 Control Register
0000h
S0EIC
b FF70h
B8h
Serial Channel 0 Error Interrupt Control Register
- - 00h
FEB2h
59h
Serial Channel 0 Receive Buffer Register (read
only)
- - XXh
S0RIC
b FF6Eh
B7h
Serial Channel 0 Receive Interrupt Control
Register
- - 00h
S0TBIC
b F19Ch E
CEh
Serial Channel 0 Transmit Buffer Interrupt
Control Register
- - 00h
S0RBUF
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ST10F280
Doc ID 8673 Rev. 3
ST10F280
Special function register overview
Table 38.
Special function registers listed by name (continued)
8-bit
address
Description
FEB0h
58h
Serial Channel 0 Transmit Buffer Register (write
only)
0000h
b FF6Ch
B6h
Serial Channel 0 Transmit Interrupt Control
Register
- - 00h
SP
FE12h
09h
CPU System Stack Pointer Register
FC00h
SSCBR
F0B4h E
5Ah
SSC Baud Rate Register
0000h
Name
S0TBUF
S0TIC
Physical
address
Reset
value
SSCCON
b FFB2h
D9h
SSC Control Register
0000h
SSCEIC
b FF76h
BBh
SSC Error Interrupt Control Register
- - 00h
59h
SSC Receive Buffer (read only)
BAh
SSC Receive Interrupt Control Register
- - 00h
58h
SSC Transmit Buffer (write only)
0000h
b 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
b FF12h
89h
CPU System Configuration Register
FE50h
28h
CAPCOM Timer 0 Register
0000h
T01CON
b FF50h
A8h
CAPCOM Timer 0 and Timer 1 Control Register
0000h
T0IC
b 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
b FF9Eh
CFh
CAPCOM Timer 1 Interrupt Control Register
- - 00h
T1REL
FE56h
2Bh
CAPCOM Timer 1 Reload Register
0000h
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
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
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
SSCRB
SSCRIC
SSCTB
SSCTIC
SYSCON
T0
T1IC
T3
T4
T5
T6
F0B2h E
b FF74h
F0B0h E
Doc ID 8673 Rev. 3
XXXXh
0xx0h(1)
191/239
Special function register overview
Table 38.
ST10F280
Special function registers listed by name (continued)
Physical
address
Name
8-bit
address
Description
Reset
value
T6CON
b FF48h
A4h
GPT2 Timer 6 Control Register
0000h
T6IC
b FF68h
B4h
GPT2 Timer 6 Interrupt Control Register
- - 00h
28h
CAPCOM Timer 7 Register
0000h
T7
F050h E
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
b F17Ch E
BFh
CAPCOM Timer 8 Interrupt Control Register
- - 00h
F056h E
2Bh
CAPCOM Timer 8 Reload Register
0000h
b FFACh
D6h
Trap Flag Register
0000h
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
XPWM Interrupt Control Register
- - 00h(3)
XP3IC
b F19Eh E
CFh
PLL unlock Interrupt Control Register
- - 00h(3)
F024h E
12h
XPER Configuration Register
- - 05h
8Eh
Constant Value 0’s Register (read only)
0000h
T8IC
T8REL
TFR
WDT
XPERCON
ZEROS
b FF1Ch
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.
Table 39.
X registers listed by name
Name
Physical
address
CAN1BTR
EF04h
CAN1 Bit Timing Register
XXXXh
CAN1CSR
EF00h
CAN1 Control/Status Register
XX01h
CAN1GMS
EF06h
CAN1 Global Mask Short
XFXXh
CAN1IR
EF02h
CAN1 Interrupt Register
- - XXh
EF14--EFF4h CAN1 Lower Arbitration register 1 to 15
XXXXh
CAN1LAR1--15
Description
CAN1LGML
EF0Ah
CAN1 Lower Global Mask Long
XXXXh
CAN1LMLM
EF0Eh
CAN1 Lower Mask Last Message
XXXXh
CAN1MCR1--15 EF10--EFF0h CAN1 Message Control Register 1 to 15
CAN1MO1--15
192/239
Reset
value
EF1x--EFFxh CAN1 Message Object 1 to 15
Doc ID 8673 Rev. 3
XXXXh
XXXXh
ST10F280
Special function register overview
Table 39.
X registers listed by name (continued)
Name
CAN1UAR1--15
Physical
address
Description
EF12--EFF2h CAN1 Upper Arbitration Register 1 to 15
Reset
value
XXXXh
CAN1UGML
EF08h
CAN1 Upper Global Mask Long
XXXXh
CAN1UMLM
EF0Ch
CAN1 Upper Mask Last Message
XXXXh
CAN2BTR
EE04h
CAN2 Bit Timing Register
XXXXh
CAN2CSR
EE00h
CAN2 Control/Status Register
XX01h
CAN2GMS
EE06h
CAN2 Global Mask Short
XFXXh
CAN2IR
EE02h
CAN2 Interrupt Register
- - XXh
EE14--EEF4h CAN2 Lower Arbitration register 1 to 15
XXXXh
CAN2LAR1--15
CAN2LGML
EE0Ah
CAN2 Lower Global Mask Long
XXXXh
CAN2LMLM
EE0Eh
CAN2 Lower Mask Last Message
XXXXh
CAN2MCR1--15 EE10--EEF0h CAN2 Message Control Register 1 to 15
XXXXh
CAN2MO1--15
EE1x--EEFxh CAN2 Message Object 1 to 15
XXXXh
CAN2UAR1--15
EE12--EEF2h CAN2 Upper Arbitration Register 1 to 15
XXXXh
CAN2UGML
EE08h
CAN2 Upper Global Mask Long
XXXXh
CAN2UMLM
EE0Ch
CAN2 Upper Mask Last Message
XXXXh
XADCMUX
C384h
Port5 or PortX10 ADC Input Selection (Read / Write)
0000h
XDP9
C200h
Direction Register Xport9 (Read / Write)
0000h
XDP9CLR
C204h
Bit Clear Direction Register Xport9 (Write only)
0000h
XDP9SET
C202h
Bit Set Direction Register Xport9 (Write only)
0000h
XODP9
C300H
Open Drain Control Register Xport9 (Read / Write)
0000h
XODP9CLR
C304H
Bit clear Open drain Control register Xport9 (Write
only)
0000h
XODP9SET
C302H
Bit Set Open Drain Control Register Xport9 (Write
only)
0000h
XP10
C380h
Read only Data register Xport10 (Read only)
0000h
XP10DIDIS
C382h
Xport10 Schmitt Trigger Input Selection (Read /
Write)
0000h
XP9
C100h
Data Register Xport9 (Read / Write)
0000h
XP9CLR
C104h
Bit Clear Data Register Xport9 (Write only)
0000h
XP9SET
C102h
Bit Set Data Register Xport9 (Write only)
0000h
XPOLAR
EC04h
XPWM Channel Polarity Control Register
0000h
XPP0
EC20h
XPWM Period Register 0
0000h
XPP1
EC22h
XPWM Period Register 1
0000h
XPP2
EC24H
XPWM Period Register 2
0000h
XPP3
EC26h
XPWM Period Register 3
0000h
Doc ID 8673 Rev. 3
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Special function register overview
Table 39.
19.1
ST10F280
X registers listed by name (continued)
Name
Physical
address
Reset
value
XPT0
EC10h
XPWM Timer Counter Register 0
0000h
XPT1
EC12h
XPWM Timer Counter Register 1
0000h
XPT2
EC14h
XPWM Timer Counter Register 2
0000h
XPT3
EC16h
XPWM Timer Counter Register 3
0000h
XPW0
EC30h
XPWM Pulse Width Register 0
0000h
XPW1
EC32h
XPWM Pulse Width Register 1
0000h
XPW2
EC34h
XPWM Pulse Width Register 2
0000h
XPW3
EC36h
XPWM Pulse Width Register 3
0000h
XPWMCON0
EC00h
XPWM Control Register 0
0000h
XPWMCON1
EC02h
XPWM Control Register 1
0000h
XTCR
C000h
Xtimer Control Register (Read / Write)
0000h
XTCVR
C006h
Xtimer Current Value Register (Read / Write)
0000h
XTEVR
C004h
Xtimer End Value Register (Read / Write)
0000h
XTSVR
C002h
Xtimer Start Value Register (Read / Write)
0000h
Description
Identification registers
The ST10F280 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
15
14
13
12
11
10
9
8
MANUF
7
6
5
4
3
2
1
0
0
0
0
0
1
R
Address:
F07Eh / 3Fh ESFR
Reset:
0x0401h
Type:
R
MANUF Manufacturer Identifier 020h: STMicroelectronics Manufacturer (JTAG worldwide
normalization).
194/239
Doc ID 8673 Rev. 3
ST10F280
Special function register overview
IDCHIP
15
14
13
12
11
Address:
F07Ch / 3Eh ESFR
Reset:
0x118Xh
Type:
R
10
9
8
7
6
5
4
3
2
1
0
2
1
0
2
1
0
CHIPID
REVID
R
R
REVID Device Revision Identifier
CHIPID Device Identifier 118h: ST10F280 identifier.
IDMEM
15
14
13
12
11
10
9
8
7
6
5
MEMTYP
MEMSIZE
R
R
Address:
0xF07Ah / 3Dh ESFR
Reset:
0x3080h
Type:
R
4
3
MEMSIZE Internal Memory Size is calculated using the following formula:
Size = 4 x [MEMSIZE] (in K Byte) 080h for ST10F280 (512K Byte)
MEMTYP Internal Memory Type 3h for ST10F280 (Flash memory).
IDPROG
15
14
13
12
11
10
9
8
7
6
5
4
3
PROGVPP
PROGVDD
R
R
Address:
F078h / 3Ch ESFR
Reset:
0x0040h
Type:
R
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 ST10F280 (5V).
PROGVPP Programming VPP Voltage (no need of external VPP) 00h
Note:
1. All identification words are read only registers.
Doc ID 8673 Rev. 3
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Special function register overview
19.2
ST10F280
System configuration registers
The ST10F280 has registers used for different configuration of the overall system. These
registers are described below.
12
11
10
9
8
7
6
5
4
3
2
STKSZ
SGTDIS
ROMEN
BYTDIS
CLKEN
WRCFG
CSCFG
PWD CFG
OWD DIS
BDR STEN
XPEN
VISIBLE
XPER-SHARE
15
ROMS1
SYSCON
14
13
R/W
R/W
R/W
R/W
R/W(1)
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W(1) R/W(1)
1
0
1. These bit are set directly or indirectly according to PORT0 and EA pin configuration during reset
sequence.
Address:
0xFF12h / 89h SFR
Reset:
0x0XX0h
Type:
R/W
Note:
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 (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.
196/239
Doc ID 8673 Rev. 3
ST10F280
Special function register overview
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.
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.
BYTDIS Disable/Enable Control for Pin BHE (Set according to data bus width)
0: Pin BHE enabled
1: Pin BHE disabled, pin may be used for general purpose I/O.
ROMEN Internal Memory Enable (Set according to pin EA during reset)
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 Flash Memory Mapping
0: Internal Flash Memory area mapped to segment 0 (00’0000H...00’7FFFH)
1: Internal Flash 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.
Table 40.
Stack size selection
<STKSZ>
Stack
size
(words)
000b
256
00’FBFEh...00’FA00h (Default after Reset)
SP.8...SP.0
001b
128
00’FBFEh...00’FB00h
SP.7...SP.0
010b
64
00’FBFEh...00’FB80h
SP.6...SP.0
011b
32
00’FBFEh...00’FBC0h
SP.5...SP.0
100b
512
00’FBFEh...00’F800h (not for 1K Byte IRAM)
SP.9...SP.0
101b
-
Reserved. Do not use this combination
-
110b
-
Reserved. Do not use this combination
-
111b
1024
Internal RAM addresses (words) of physical stack
00’FDFEh...00’FX00h (Note: No circular stack)
00’FX00h represents the lower IRAM limit, i.e.
1K Byte: 00’FA00h, 2K Byte: 00’F600h, 3K Byte:
00’F200h
Doc ID 8673 Rev. 3
Significant bits
of stack pointer
SP
SP.11...SP.0
197/239
Special function register overview
ST10F280
13
12
11
10
9
8
CSREN0
RDYPOL0
RDYEN0
-
BUS ACT0
ALE CTL0
-
R/W
R/W
R/W
R/W
7
R/W(1) R/W(1)
5
4
BTYP
RWDC0
14
MTTC0
15
CSWEN0
BUSCON0
6
3
2
1
MCTC
R/W(2)
R/W
R/W
R/W
0
1. 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.
2. BTYP (bit 6 and 7) are set according to the configuration of the bit l1 and l2 of PORT0 latched at the end of
the reset sequence.
Address:
0xFF0Ch / 86h SFR
Reset:
0x0XX0h
Type:
R/W
9
8
CSREN1
RDYPOL1
RDYEN1
-
-
R/W
R/W
R/W
R/W
Address:
0xFF14h / 8Ah SFR
Reset:
0x0000h
Type:
R/W
R/W
R/W
5
4
BTYP
RWDC1
10
MCTC
R/W
R/W
R/W
R/W
5
4
BTYP
RWDC2
11
MTTC1
12
MTTC2
13
ALECTL1
14
BUSACT1
15
CSWEN1
BUSCON1
7
6
3
2
MCTC
R/W
R/W
R/W
R/W
1
0
1
0
15
14
13
12
11
10
9
8
CSWEN2
CSREN2
RDYPOL2
RDYEN2
-
BUSACT2
ALECTL2
BUSCON2
-
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xFF16h / 8Bh SFR
Reset:
0x0000h
Type:
R/W
198/239
Doc ID 8673 Rev. 3
7
6
3
2
ST10F280
Special function register overview
9
8
CSREN3
RDYPOL3
RDYEN3
-
-
R/W
R/W
R/W
R/W
Address:
0xFF18h / 8Ch SFR
Reset:
0x0000h
Type:
R/W
R/W
R/W
5
4
BTYP
RWDC3
10
MCTC
R/W
R/W
R/W
R/W
5
4
BTYP
RWDC4
11
MTTC3
12
MTTC4
13
ALECTL3
14
BUSACT3
15
CSWEN3
BUSCON3
7
6
3
2
MCTC
R/W
R/W
R/W
R/W
1
0
1
0
15
14
13
12
11
10
9
8
CSWEN4
CSREN4
RDYPOL4
RDYEN4
-
BUSACT4
ALECTL4
BUSCON4
-
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xFF14h / 8Dh SFR
Reset:
0x0000h
Type:
R/W
MCTC
RWDCx
MTTCx
BTYP
7
6
3
2
Memory Cycle Time Control (Number of memory cycle time wait states)
0000: 15 wait states (Nber = 15 [MCTC])
...
1111: No wait states
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
Memory Tristate Time Control
0: 1 wait state
1: No wait state
External Bus Configuration
00: 8-bit Demultiplexed Bus
01: 8-bit Multiplexed Bus
10: 16-bit Demultiplexed Bus
11: 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)
Doc ID 8673 Rev. 3
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Special function register overview
RDYENx
RDYPOLx
ST10F280
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
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
RP0H
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
6
5
4
3
2
1
SALSEL
CSSEL
WRC
R (1)(2)
R (2)
R (2)
R(2)
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.
Address:
0xF108h / 84h ESFR
Reset:
0x--XXh
Type:
R
WRC
CSSEL
SALSEL
200/239
Write Configuration Control
0: Pin WR acts as WRL, pin BHE acts as WRH
1: Pins WR and BHE retain their normal function
Chip Select Line Selection (Number of active CS outputs)
00: 3 CS lines: CS2...CS0
01: 2 CS lines: CS1...CS0
10: No CS lines at all
11: 5 CS lines: CS4...CS0 (Default without pull-downs)
Segment Address Line Selection (Number of active segment address outputs)
00: 4-bit segment address: A19...A16
01: No segment address lines at all
10: 8-bit segment address: A23...A16
11: 2-bit segment address: A17...A16 (Default without pull-downs)
Doc ID 8673 Rev. 3
0
CLKSEL
ST10F280
Special function register overview
CLKSEL
System Clock Selection
000: fCPU = 2.5 x fOSC
001: fCPU = 0.5 x fOSC
010: fCPU = 10 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
EXICON
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
EXI7ES
EXI6ES
EXI5ES
EXI4ES
EXI3ES
EXI2ES
EXI1ES
EXI0ES
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xF1C0h / E0h ESFR
Reset:
0x0000h
Type:
R/W
EXIxES(x=7...0)
External Interrupt x Edge Selection Field (x=7...0)
00: Fast external interrupts disabled: standard mode
EXxIN pin not taken in account for entering/exiting Power Down mode.
01: Interrupt on positive edge (rising)
Enter Power Down mode if EXiIN = ‘0’, exit if EXxIN = ‘1’ (referred as ‘high’ active
level)
10: Interrupt on negative edge (falling)
Enter Power Down mode if EXiIN = ‘1’, exit if EXxIN = ‘0’ (referred as ‘low’ active
level)
11: Interrupt on any edge (rising or falling)
Always enter Power Down mode, exit if EXxIN level changed.
EXISEL
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
EXI7SS
EXI6SS
EXI5SS
EXI4SS
EXI3SS
EXI2SS
EXI1SS
EXI0SS
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address:
0xF1DAh / EDh ESFR
Reset:
0x0000h
Type:
R/W
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”.
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Special function register overview
ST10F280
EXIxSS
Port 2 pin
Alternate source
0
P2.8
CAN1_RxD
1
P2.9
CAN2_RxD
2...7
P2.10...15
Not used (zero)
XP3IC
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
R/W
Address:
0xF19Eh / CFh ESFR
Reset:
0x--00h
Type:
R/W
Note:
6
5
XP3IR XP3IE
4
3
2
1
0
XP3ILVL
GLVL
R/W
R/W
R/W
XP3IC register has the same bit field as xxIC interrupt registers
xxIC
15
14
13
12
11
10
9
8
7
6
-
-
-
-
-
-
-
-
xxIR
xxIE
ILVL
GLVL
R/W
R/W
R/W
R/W
Address:
0xyyyyh / zzh SFR
Reset:
0x--00h
Type:
R/W
5
4
3
2
GLVL Group Level
Defines the internal order for simultaneous requests of the same priority.
11: Highest group priority
00: Lowest group priority
ILVL Interrupt Priority Level
Defines the priority level for the arbitration of requests.
1111: Highest priority level
0000: 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
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1
0
ST10F280
Special function register overview
XPERCON
10
9
8
7
6
5
-
-
-
-
-
-
-
-
-
-
-
Address:
0xF024h / 12h ESFR
Reset:
0x--05h
Type:
R/W
4
3
2
1
0
CAN1EN
11
CAN2EN
12
XRAMEN
13
XPERCONEN3
14
XPWMEN
15
R/W
R/W
R/W
R/W
R/W
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’EF00h00’EFFFh is only directed to external memory if CAN2EN and XPWM bits are
cleared also.
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’EE00h00’EEFFh is only directed to external memory if CAN1EN and XPWM bits are
cleared also.
T1: he on-chip CAN2 XPeripheral is enabled and can be accessed.
XRAMEN XRAM Enable Bit
0: Accesses to the on-chip 16K Byte XRAM are disabled, external access
performed.
1: The on-chip 16K Byte XRAM is enabled and can be accessed.
XPERCONEN3 XPORT9,XTIMER, XPORT10, XADCMUX Enable Bit
0: Accesses to the XPORT9, XTIMER, XPORT10, XADCMUX peripherals are
disabled, external access performed.
1: The on-chip XPORT9, XTIMER, XPORT10, XADCMUX peripherals are enabled
and can be accessed.
XPWMEN XPWM Enable Bit
0: Accesses to the on-chip XPWM 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 XPWM is enabled and can be accessed.
Note:
When both CAN and XPWM are disabled via XPERCON setting, then any access in the
address range 00’EC00h 00’EFFFh will be directed to external memory interface, using the
BUSCONx register corresponding to address matching ADDRSELx register. P4.4 and P4.7
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Special function register overview
ST10F280
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: XCAN1 is enabled, XCAN2 is disabled, XRAM is
enabled, XPORT9, XTIMER, XPORT10, XPWM are disabled.
Register XPERCON cannot be changed after the global enabling of XPeripherals, i.e. after
setting of bit XPEN in SYSCON register.
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ST10F280
Electrical characteristics
20
Electrical characteristics
20.1
Absolute maximum ratings
Stresses the device above the rating listed in the Table 41: 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 Table 41.
Table 41.
Absolute maximum ratings
Symbol
Parameter
Unit
-0.5, +6.5
V
VDD
Voltage on VDD pins with respect to ground
VIO
Voltage on any pin with respect to ground
-0.5, (VDD +0.5)
V
Voltage on VAREF pin with respect to ground
-0.3, (VDD +0.3)
V
VAREF
IOV
Input Current on any pin during overload condition
-10, +10
mA
ITOV
Absolute Sum of all input currents during overload
condition
|100 mA|
mA
Ptot
Power Dissipation
1.5
W
TA
Ambient Temperature under bias
-40, +125
°C
Storage Temperature
-65, +150
°C
Tstg
20.2
Value
Parameter interpretation
The parameters listed in the following tables represent the characteristics of the ST10F280
and its demands on the system. Where the ST10F280 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 ST10F280, the symbol “SR” for System Requirement, is included in the “Symbol”
column.
20.3
DC characteristics
VDD = 5 V ± 10%, VSS = 0 V, fCPU = 40 MHz, Reset active, TA = -40°C to 125°C
Table 42.
DC characteristics
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
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Electrical characteristics
Table 42.
ST10F280
DC characteristics (continued)
Symbol
Parameter
Test
conditions
Min.
Max.
Unit
–
0.2 VDD +
0.9
VDD + 0.5
V
Input high voltage
(all except RSTIN and XTAL1)
VIH
SR
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
HYS
Input Hysteresis (special threshold)(1)
–
400
–
mV
IOL = 2.4mA
–
0.45
V
IOL1 = 1.6mA
–
0.45
V
IOH = -500μA
0.9 VDD
–
V
IOH = -2.4mA
2.4
–
V
IOH = – 250μA
0.9 VDD
–
V
IOH = – 1.6mA
2.4
–
V
Output low voltage (PORT0, PORT1, Port 4,
ALE, RD, WR, BHE, CLKOUT, RSTOUT)(2)
VOL
CC
VOL1
CC Output low voltage (all other outputs)(2)
VOH
CC
VOH1
CC Output high voltage (all other outputs)(2)(3)
Output high voltage (PORT0, PORT1, Port4,
ALE, RD, WR, BHE, CLKOUT, RSTOUT)(2)
 IOZ1 
CC Input leakage current (Port 5, XPort 10)
0V < VIN < VDD
–
0.2
μA
 IOZ2 
CC Input leakage current (all other)
0V < VIN < VDD
–
1
μA
 IOV 
SR Overload current(1) (4)
–
5
mA
–
50
250
kΩ
VOUT = 2.4V
–
-40
μA
VOUT = VOLmax
-500
–
μA
VOUT = VOLmax
40
–
μA
VOUT = 2.4V
–
500
μA
VOUT = 2.4V
–
-40
μA
VOUT =
VOL1max
-500
–
μA
VIN = VIHmin(6)
–
-10
μA
VIN = VILmax(7)
-100
–
μA
0V < VIN < VDD
–
20
μA
f = 1MHz,
TA = 25°C
–
10
pF
RRST
IRWH
CC RSTIN pull-up
resistor(1)
Read / Write inactive
current(5)(6)
IRWL
Read / Write active current
IALEL
ALE inactive current(5)(6)
IALEH
ALE active
current(5)(7)
current(5)(6)
IP6H
Port 6 inactive
IP6L
Port 6 active current(5)(7)
IP0H
(5)(7)
PORT0 configuration current(5)
IP0L
 IIL 
CC XTAL1 input current
CIO
CC Pin capacitance (digital inputs / outputs)(1)(5)
ICC
Power supply current(8)
RSTIN = VIH1
fCPU in [MHz]
–
30 + 3.3 x
fCPU
mA
IID
Idle mode supply current(9)
RSTIN = VIH1
fCPU in [MHz]
–
20 + fCPU
mA
IPD
Power-down mode supply current(10)
VDD = 5.5V
TA = 55°C
–
200
μA
1. Partially tested, guaranteed by design characterization.
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Doc ID 8673 Rev. 3
ST10F280
Electrical characteristics
2. ST10F280 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.
3. 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.
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 70. These
parameters are tested at VDDmax and 40MHz 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-state, R/W delay, memory tristate wait state, normal ALE. Peripherals are not activated
9.
Idle mode supply current is a function of the operating frequency. This dependency is illustrated in the Figure 70. These
parameters are tested at VDDmax and 40MHz CPU clock with all outputs disconnected and all inputs at VIL or VIH.
10. This parameter value includes leakage currents. With all inputs (including pins configured as inputs) at 0 V to 0.1V or at
VDD – 0.1V to VDD, VREF = 0V, all outputs (including pins configured as outputs) disconnected.
,>[email protected]
Figure 74. Supply / idle current as a function of operating frequency
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Electrical characteristics
20.3.1
ST10F280
A/D converter characteristics
VDD = 5 V ± 10%, VSS = 0 V, TA = -40°C to 125°C, 4.0 V ≤ VAREF ≤ VDD + 0.1 V;
VSS0.1 V ≤ VAGND ≤ VSS + 0.2 V
Table 43.
Symbol
A/D converter characteristics
Test
Condition
Parameter
VAREF
SR
Analog Reference voltage
VAIN
SR
Analog input voltage
IAREF
CC
Min.
Max
Unit
4.0
VDD + 0.1
V
(1)(2)
VAGND
VAREF
V
Reference supply current
running mode
power-down mode
(3)
–
–
500
1
μA
μA
pF
pF
CAIN
CC
ADC input capacitance
Not sampling
Sampling
(3)
–
–
10
15
tS
CC
Sample time
(4)(5)
48 TCL
1 536 TCL
tC
CC
Conversion time
(6)(5)
388 TCL
2 884 TCL
Differential Nonlinearity
(7)
-0.5
+0.5
LSB
Integral Nonlinearity
(7)
-1.5
+1.5
LSB
-1.0
+1.0
LSB
LSB
DNL
INL
CC
CC
OFS
CC
Offset Error
(7)
TUE
CC
Total unadjusted error
(7)
-2.0
+2.0
RASRC
SR
Internal resistance of analog
source
tS in [ns] (4)(3)
–
(tS / 150) 0.25
K
CC
Coupling Factor between inputs
(8)(3)
–
1/500
kΩ
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. 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.
3. Partially tested, guaranteed by design characterization.
4. 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 20.3.2 and to the table 39 of page 156:
- 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 20.4.5 at page 159.
5. This parameter is fixed by ADC control logic.
6. 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 the table 39 of page 156:
- 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
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Doc ID 8673 Rev. 3
ST10F280
Electrical characteristics
7. 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.
8. 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.
20.3.2
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 keep for exact timing
matching with the 10-bit A/D converter module implemented in 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 ST10F280 CPU clock. This allows adjusting the A/D converter
of the ST10F280 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 = 1/2 TCL.
Table 44.
ADC sampling and conversion timing
Conversion clock tCC
ADCTC
Sample clock tSC
ADSTC
tSC =
At fCPU = 40MHz
and ADCTC = 00
00
tCC
0.3μs
Reserved
01
tCC x 2
0.6μs
TCL x 96
1.2 μs
10
tCC x 4
1.2μs
TCL x 48
0.6 μs
11
tCC x 8
2.4μs
TCL = 1/2 x fXTAL
At fCPU = 40MHz
00
TCL x 24
0.3μs
01
Reserved, do not
use
10
11
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Electrical characteristics
ST10F280
A complete conversion will take 14 tCC + 2 tSC + 4 TCL (fastest conversion rate = 4.85μs at
40MHz). This time includes the conversion itself, the sample time and the time required to
transfer the digital value to the result register.
20.4
AC characteristics
20.4.1
Test waveforms
Figure 75. Input / output waveforms
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20.4.2
Definition of internal timing
The internal operation of the ST10F280 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”.
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 ST10F280.
The example for PLL operation shown in Figure 73 refers to a PLL factor of 4.
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Doc ID 8673 Rev. 3
ST10F280
Electrical characteristics
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 77. Generation mechanisms for the CPU clock
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20.4.3
Clock generation modes
The Table 45 associates the combinations of these three bit with the respective clock
generation mode.
Table 45.
CPU frequency generation
P0H.7 P0H.6
P0H.5
CPU frequency
fCPU = fXTAL x F
External clock input
range(1)
1
1
1
fXTAL x 4
2.5 to 10MHz
1
1
0
fXTAL x 3
3.33 to 13.33MHz
1
0
1
fXTAL x 2
5 to 20MHz
1
0
0
fXTAL x 5
2 to 8MHz
0
1
1
fXTAL x 1
1 to 40MHz
0
1
0
fXTAL x 10
1 to 4MHz
0
0
1
fXTAL x 0.5
2 to 80MHz
0
0
0
fXTAL x 2.5
4 to 16MHz
Notes
Default configuration
Direct drive(2)(3)
CPU clock via
prescaler(4)
1. The external clock input range refers to a CPU clock range of 1...40MHz.
2. The maximum depends on the duty cycle of the external clock signal.
3. The PLL free-running frequency is from 2 to 10MHz.
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Electrical characteristics
ST10F280
4. The maximum input frequency is 25MHz 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..
20.4.4
Prescaler operation
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.
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.
20.4.5
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.
Therefor, 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 ALl
xl DCmin
DC = duty cycle
For two consecutive TCLs, the deviation caused by the duty cycle of fXTAL is compensated,
so the duration of 2 TCL 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:
212/239
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.
Doc ID 8673 Rev. 3
ST10F280
20.4.6
Electrical characteristics
Oscillator Watchdog (OWD)
An on-chip watchdog oscillator is implemented in the ST10F280. 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 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 from 2 to 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.
20.4.7
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 45). 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.
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 74 given below. For
N periods of TCL the minimum value is computed using the corresponding deviation DN:
TCL
MIN
= TCL
NOM

D 
N
×  1 – -------------

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%
3 TCLmin = 3 TCLNOM x (1 - 3.8/100) = 3 TCLNOM x 0.962
3 TCLmin = (36.075ns at fCPU = 40MHz)
Doc ID 8673 Rev. 3
213/239
Electrical characteristics
ST10F280
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 78. Approximated maximum PLL Jitter
0D[MLWWHU>@
7KLVDSSUR[LPDWHGIRUPXODLVYDOLGIRU
d1dDQG0+]dI&38 d0+]
“
“
“
“
1
("1($'5
20.4.8
External clock drive XTAL1
VDD = 5 V ± 10%, VSS = 0 V, TA = -40°C to 125 °C
Table 46.
External clock drive XTAL1
fCPU = fXTAL x F
fCPU = fXTAL
Parameter
fCPU = fXTAL / 2
Symbol
F = 2 / 2.5 / 3 / 4 / 5 /
10
Min.
Max.
Min.
Max.
Min.
Max.
Unit
Oscillator period
tOSC SR
25 (1)
–
12.5
–
40 x N
100 x N
ns
High time
t1
SR
10 (2)
–
5 (2)
–
10 (2)
–
ns
Low time
t2
SR
10 (2)
–
5 (2)
–
10 (2)
–
ns
3
(2)
ns
3
(2)
ns
Rise time
Fall time
t3
t4
SR
SR
–
–
3
(2)
3
(2)
–
–
3
(2)
3
(2)
–
–
1. Theoretical minimum. The real minimum value depends on the duty cycle of the input clock signal. 25MHz
is the maximum input frequency when using an external crystal oscillator. However, 40MHz can be applied
with an external clock source.
2. The input clock signal must reach the defined levels VIL and VIH2
214/239
Doc ID 8673 Rev. 3
ST10F280
Electrical characteristics
Figure 79. External clock drive XTAL1
W
W
W
9,+
9,/
W
W26&
("1($'5
20.4.9
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.
Table 47.
Memory cycle variables
Description
Values
ALE Extension
tA
TCL x [ALECTL]
Memory Cycle Time wait states
tC
2 TCL x (15 - [MCTC])
Memory Tri-state Time
tF
2 TCL x (1 - [MTTC])
Multiplexed bus
VDD = 5 V ± 10%, VSS = 0 V, TA = -40°C to +125°C, CL = 50 pF,
ALE cycle time = 6 TCL + 2 tA + tC + tF (75 ns at 40 MHz CPU clock without wait states).
Table 48.
Symbol
Multiplexed bus characteristics
Max. CPU Clock
= 40MHz
Parameter
t5
CC ALE high time
t6
CC Address setup to ALE
(1)
Variable CPU Clock
1/2 TCL = 1 to 40MHz
Unit
20.4.10
Symbol
Min.
Max.
Min.
Max.
4 + tA
–
TCL - 8.5 + tA
–
ns
2 + tA
–
TCL - 10.5 + tA
–
ns
4 + tA
–
TCL - 8.5 + tA
–
ns
t7
CC Address hold after ALE
t8
CC
ALE falling edge to RD, WR
(with R/W-delay)
4 + tA
–
TCL - 8.5 + tA
–
ns
t9
CC
ALE falling edge to RD, WR
(no R/W-delay)
-8.5 +
tA
–
-8.5 + tA
–
ns
t10 CC
Address float after RD, WR
(with R/W-delay) (1)
–
6
–
6
ns
t11 CC
Address float after RD, WR
(no R/W-delay)(1)
–
18.5
–
TCL + 6
ns
t12 CC
RD, WR low time (with R/Wdelay)
15.5 +
tC
–
2 TCL -9.5 + tC
–
ns
Doc ID 8673 Rev. 3
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Electrical characteristics
Symbol
Multiplexed bus characteristics (continued)
Max. CPU Clock
= 40MHz
Parameter
Min.
Max.
Min.
Max.
28 + tC
–
3 TCL -9.5 + tC
–
t13 CC
RD, WR low time (no R/Wdelay)
t14 SR
RD to valid data in (with
R/W-delay)
–
6 + tC
–
2 TCL - 19 + tC ns
t15 SR
RD to valid data in (no R/Wdelay)
–
18.5 + tC
–
3 TCL - 19 + tC ns
–
18.5
+ tA + tC
–
3 TCL - 19
+ tA + tC
ns
t16 SR ALE low to valid data in
ns
t17 SR
Address/Unlatched CS to
valid data in
–
22 + 2tA + tC
–
4 TCL - 28
+ 2tA + tC
ns
t18 SR
Data hold after RD rising
edge
0
–
0
–
ns
–
16.5 + tF
–
2 TCL - 8.5 +
tF
ns
10 + tC
–
2 TCL -15 + tC
–
ns
4 + tF
–
2 TCL - 8.5 +
tF
–
ns
t19 SR Data float after RD (1)
t22 CC Data valid to WR
t23 CC Data hold after WR
216/239
Variable CPU Clock
1/2 TCL = 1 to 40MHz
Unit
Table 48.
ST10F280
t25 CC
ALE rising edge after RD,
WR
15 + tF
–
2 TCL -10 + tF
–
ns
t27 CC
Address/Unlatched CS hold
after RD, WR
10 + tF
–
2 TCL -15 + 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
–
18.5 + tC +
2tA
–
3 TCL - 19
+ tC + 2tA
ns
t40 CC
Latched CS hold after RD,
WR
27 + tF
–
3 TCL - 10.5 +
tF
–
ns
t42 CC
ALE fall. edge to RdCS,
WrCS (with R/W delay)
7 + tA
–
TCL - 5.5+ tA
–
ns
t43 CC
ALE fall. edge to RdCS,
WrCS (no R/W delay)
-5.5 +
tA
–
-5.5 + tA
–
ns
t44 CC
Address float after RdCS,
WrCS (with R/W delay)(1)
–
0
–
0
ns
t45 CC
Address float after RdCS,
WrCS (no R/W delay)(1)
–
12.5
–
TCL
ns
t46 SR
RdCS to Valid Data In (with
R/W delay)
–
4 + tC
–
2 TCL - 21 + tC ns
t47 SR
RdCS to Valid Data In (no
R/W delay)
–
16.5 + tC
–
3 TCL - 21 + tC ns
t48 CC
RdCS, WrCS Low Time (with
R/W delay)
15.5 +
tC
–
2 TCL - 9.5 +
tC
Doc ID 8673 Rev. 3
–
ns
ST10F280
Electrical characteristics
Symbol
t49 CC
Multiplexed bus characteristics (continued)
Max. CPU Clock
= 40MHz
Parameter
RdCS, WrCS Low Time (no
R/W delay)
t50 CC Data valid to WrCS
t51 SR Data hold after RdCS
t52 SR Data float after RdCS
t54 CC
Address hold after
RdCS, WrCS
t56 CC Data hold after WrCS
(1)
Variable CPU Clock
1/2 TCL = 1 to 40MHz
Unit
Table 48.
Min.
Max.
Min.
Max.
28 + tC
–
3 TCL - 9.5 +
tC
–
ns
10 + tC
–
2 TCL - 15+ tC
–
ns
0
–
0
–
ns
–
16.5 + tF
–
2 TCL - 8.5+tF
ns
6 + tF
–
2 TCL - 19 + tF
–
ns
6 + tF
–
2 TCL - 19 + tF
–
ns
1. Partially tested, guaranteed by design characterization.
Doc ID 8673 Rev. 3
217/239
Electrical characteristics
ST10F280
Figure 80. 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
GAPGCFT00934
218/239
Doc ID 8673 Rev. 3
ST10F280
Electrical characteristics
Figure 81. 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
t10
t11
WR
WRL
WRH
t13
t22
t12
GAPGCFT00935
Doc ID 8673 Rev. 3
219/239
Electrical characteristics
ST10F280
Figure 82. 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
GAPGCFT00936
220/239
Doc ID 8673 Rev. 3
ST10F280
Electrical characteristics
Figure 83. 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
GAPGCFT00937
Doc ID 8673 Rev. 3
221/239
Electrical characteristics
20.4.11
ST10F280
Demultiplexed bus
VDD = 5 V ± 10%, VSS = 0 V, TA = -40°C to 125°C, CL = 50 pF,
ALE cycle time = 4 TCL + 2tA + tC + tF (50 ns at 40 MHz CPU clock without wait states).
Symbol
Demultiplexed bus characteristics
Maximum CPU Clock
= 40MHz
Parameter
Min.
Max.
Min.
Max.
t5
CC ALE high time
4 + tA
–
TCL - 8.5 + tA
–
ns
t6
CC Address setup to ALE
2 + tA
–
TCL - 10.5 + tA
–
ns
16.5 + 2tA
–
2 TCL - 8.5 +
2tA
–
ns
4 + 2tA
–
TCL - 8.5 + 2tA
–
ns
15.5 + tC
–
2 TCL - 9.5 +
tC
–
ns
28 + tC
–
3 TCL - 9.5 +
tC
–
ns
Address/Unlatched CS
t80 CC setup to RD, WR (with
R/W-delay)
Address/Unlatched CS
t81 CC setup to RD, WR (no R/Wdelay)
t12 CC
RD, WR low time (with
R/W-delay)
t13 CC
RD, WR low time (no R/Wdelay)
t14 SR
RD to valid data in (with
R/W-delay)
–
6 + tC
–
2 TCL - 19 + tC
ns
t15 SR
RD to valid data in (no
R/W-delay)
–
18.5 + tC
–
3 TCL - 19 + tC
ns
–
18.5 + tA +
tC
–
3 TCL - 19
+ tA + tC
ns
t16 SR ALE low to valid data in
t17 SR
Address/Unlatched CS to
valid data in
–
22 + 2tA +
tC
–
4 TCL - 28
+ 2tA + tC
ns
t18 SR
Data hold after RD rising
edge
0
–
0
–
ns
t20 SR
Data float after RD rising
edge (with R/W-delay) (1)(2)
–
16.5 + tF
–
2 TCL - 8.5
+ tF + 2tA 1
ns
t21 SR
Data float after RD rising
edge (no R/W-delay) (1)(2)
–
4 + tF
–
TCL - 8.5
+ tF + 2tA 1
ns
10 + tC
–
2 TCL - 15 + tC
–
ns
4 + tF
–
TCL - 8.5 + tF
–
ns
t22 CC Data valid to WR
t24 CC Data hold after WR
222/239
Variable CPU Clock
1/2 TCL = 1 to 40MHz
Unit
Table 49.
t26 CC
ALE rising edge after RD,
WR
-10 + tF
–
-10 + tF
–
ns
t28 CC
Address/Unlatched CS
hold after RD, WR (3)
0 (no tF)
-5 + tF
(tF > 0)
–
0 (no tF)
-5 + tF
(tF > 0)
–
ns
t28h CC
Address/Unlatched CS
hold after WRH
-5 + tF
–
-5 + tF
–
ns
Doc ID 8673 Rev. 3
ST10F280
Electrical characteristics
Symbol
Demultiplexed bus characteristics (continued)
Maximum CPU Clock
= 40MHz
Parameter
Variable CPU Clock
1/2 TCL = 1 to 40MHz
Unit
Table 49.
Min.
Max.
Min.
Max.
-4 - tA
6 - tA
-4 - tA
6 - tA
ns
–
18.5
+ tC + 2tA
–
3 TCL - 19
+ tC + 2tA
ns
2 + tF
–
TCL - 10.5 + tF
–
ns
t38 CC
ALE falling edge to Latched
CS
t39 SR
Latched CS low to Valid
Data In
t41 CC
Latched CS hold after RD,
WR
t82 CC
Address setup to RdCS,
WrCS (with R/W-delay)
14.5 + 2tA
–
2 TCL - 10.5 +
2tA
–
ns
t83 CC
Address setup to RdCS,
WrCS (no R/W-delay)
2 + 2tA
–
TCL - 10.5 +
2tA
–
ns
t46 SR
RdCS to Valid Data In (with
R/W-delay)
–
4 + tC
–
2 TCL - 21 + tC
ns
t47 SR
RdCS to Valid Data In (no
R/W-delay)
–
16.5 + tC
–
3 TCL - 21 + tC
ns
t48 CC
RdCS, WrCS Low Time
(with R/W-delay)
15.5 + tC
–
2 TCL - 9.5
+ tC
–
ns
t49 CC
RdCS, WrCS Low Time (no
R/W-delay)
28 + tC
–
3 TCL - 9.5 +
tC
–
ns
10 + tC
–
2 TCL - 15 + tC
–
ns
t51 SR Data hold after RdCS
0
–
0
–
ns
t53 SR
Data float after RdCS
(with R/W-delay) (2)
–
16.5 + tF
–
2 TCL - 8.5 +
tF
ns
t68 SR
Data float after RdCS
(no R/W-delay) (2)
–
4 + tF
–
TCL - 8.5 + tF
ns
t55 CC
Address hold after
RdCS, WrCS
-8.5 + tF
–
-8.5 + tF
–
ns
2 + tF
–
TCL - 10.5 + tF
–
ns
t50 CC Data valid to WrCS
t57 CC Data hold after WrCS
1. R/W-delay and tA refer to the next following bus cycle.
2. Partially tested, guaranteed by design characterization.
3. 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.
Doc ID 8673 Rev. 3
223/239
Electrical characteristics
ST10F280
Figure 84. 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
t28 (or t28h)
t17
A23-A16
A15-A0 (P1)
BHE
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
GAPGCFT00938
1. Un-latched CSx = t41u = t41 TCL =10.5 + tF.
224/239
Doc ID 8673 Rev. 3
ST10F280
Electrical characteristics
Figure 85. 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
t24
t12
t13
GAPGCFT00939
Doc ID 8673 Rev. 3
225/239
Electrical characteristics
ST10F280
Figure 86. 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
GAPGCFT00940
226/239
Doc ID 8673 Rev. 3
ST10F280
Electrical characteristics
Figure 87. 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
t57
WrCSx
t48
t49
GAPGCFT00941
CLKOUT and READY
VDD = 5 V ± 10%, VSS = 0 V, TA = -40°C to 125°C, CL = 50 pF
Table 50.
Symbol
CLKOUT and READY characteristics
Parameter
Maximum CPU Clock
= 40MHz
Variable CPU Clock
1/2 TCL = 1 to 40MHz
Min.
Max.
Min.
Max.
Unit
20.4.12
t29
CC CLKOUT cycle time
25
25
2 TCL
2TCL
ns
t30
CC CLKOUT high time
4
–
TCL – 8.5
–
ns
t31
CC CLKOUT low time
3
–
TCL – 9.5
–
ns
t32
CC CLKOUT rise time
–
4
–
4
ns
t33
CC CLKOUT fall time
–
4
–
4
ns
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Electrical characteristics
Symbol
CLKOUT and READY characteristics (continued)
Maximum CPU Clock
= 40MHz
Parameter
Variable CPU Clock
1/2 TCL = 1 to 40MHz
Min.
Max.
Min.
Max.
t34
CC
CLKOUT rising edge to
ALE falling edge
-2 + tA
8 + tA
-2 + tA
8 + tA
ns
t35
SR
Synchronous READY
setup time to CLKOUT
12.5
–
12.5
–
ns
t36
SR
Synchronous READY hold
time after CLKOUT
2
–
2
–
ns
t37
SR
Asynchronous READY low
time
35
–
2 TCL + 10
–
ns
t58
SR
Asynchronous READY
setup time (1)
12.5
–
12.5
–
ns
t59
SR
Asynchronous READY
hold time (1)
2
–
2
–
ns
t60
Asynchronous READY
hold time after RD, WR
SR
high (Demultiplexed
Bus)(2)
0
0 + 2tA + tC +
tF (2)
0
TCL - 12.5
+ 2tA + tC + tF
ns
(2)
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 2 TCL 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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Unit
Table 50.
ST10F280
Doc ID 8673 Rev. 3
ST10F280
Electrical characteristics
Figure 88. 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
t36
t58
t59
t60 4)
3)
3)
t37
6)
5)
GAPGCFT00942
1. Cycle as programmed, including MCTC wait states (Example shows 0 MCTC WS).
2. The leading edge of the respective command depends on R/W-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.
External bus arbitration
VDD = 5 V ± 10%, VSS = 0 V, TA = -40°C to 125°C, CL = 50 pF
Table 51.
Symbol
External bus arbitration
Maximum CPU Clock
= 40MHz
Parameter
Variable CPU Clock
1/2 TCL = 1 to 40MHz
Min.
Max.
Min.
Max.
Unit
20.4.13
t61
SR
HOLD input setup time to
CLKOUT
15
–
15
–
ns
t62
CC
CLKOUT to HLDA high or
BREQ low delay
–
12.5
–
12.5
ns
t63
CC
CLKOUT to HLDA low or
BREQ high delay
–
12.5
–
12.5
ns
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Electrical characteristics
External bus arbitration (continued)
Symbol
Maximum CPU Clock
= 40MHz
Parameter
t64
CC CSx release
t65
CC CSx drive
(1)
t66
CC Other signals release
t67
CC Other signals drive
(1)
Variable CPU Clock
1/2 TCL = 1 to 40MHz
Min.
Max.
Min.
Max.
–
15
–
15
ns
-4
15
-4
15
ns
–
15
–
15
ns
-4
15
-4
15
ns
1. Partially tested, guaranteed by design characterization
Figure 89. External bus arbitration, releasing the bus
CLKOUT
t61
HOLD
t63
HLDA
1)
t62
BREQ
2)
t64
3)
CSx
(P6.x)
1)
t66
Others
GAPGCFT00943
1. The ST10F280 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.
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Unit
Table 51.
ST10F280
Doc ID 8673 Rev. 3
ST10F280
Electrical characteristics
Figure 90. External bus arbitration, (regaining the bus)
2)
CLKOUT
t61
HOLD
t62
HLDA
t62
t62
BREQ
t63
1)
t65
CSx
(On P6.x)
t67
Other
Signals
GAPGCFT00944
1. 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
deactivated without the ST10F280 requesting the bus
2. The next ST10F280 driven bus cycle may start here.
High-speed synchronous serial interface (SSC) timing
Master mode
VCC = 5 V ±10%, VSS = 0 V, CPU clock = 40 MHz, TA = -40°C to 125°C, CL = 50 pF
Table 52.
Symbol
SSC master timing
Maximum Baud rate =
10M Baud (<SSCBR> =
0001h)
Parameter
Variable Baud rate
(<SSCBR>=0001hFFFFh)
Min.
Max.
Min.
Max.
Unit
20.4.14
t300
CC SSC clock cycle time
100
100
8 TCL
262144
TCL
ns
t301
CC SSC clock high time
40
–
t300/2 - 10
–
ns
t302
CC SSC clock low time
40
–
t300/2 - 10
–
ns
t303
CC SSC clock rise time
–
10
–
10
ns
t304
CC SSC clock fall time
–
10
–
10
ns
t305
CC
Write data valid after shift
edge
–
15
–
15
ns
t306
CC
Write data hold after shift
edge(1)
-2
–
-2
–
ns
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Electrical characteristics
SSC master timing (continued)
Symbol
Maximum Baud rate =
10M Baud (<SSCBR> =
0001h)
Parameter
Variable Baud rate
(<SSCBR>=0001hFFFFh)
Unit
Table 52.
ST10F280
Min.
Max.
Min.
Max.
37.5
–
2 TCL +
12.5
–
ns
t307p
Read data setup time
before latch edge, phase
SR
error detection on
(SSCPEN = 1)
t308p
Read data hold time after
SR latch edge, phase error
detection on (SSCPEN = 1)
50
–
4 TCL
–
ns
t307
Read data setup time
before latch edge, phase
SR
error detection off
(SSCPEN = 0)
25
–
2 TCL
–
ns
t308
Read data hold time after
SR latch edge, phase error
detection off (SSCPEN = 0)
0
–
0
–
ns
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.
Figure 91. SSC master timing
t300
1)
t301
t302
2)
SCLK
t304
t305
t305
MTSR
1st Out Bit
t303
t306
2nd Out Bit
1st.In Bit
Last Out Bit
t307 t308
t307 t308
MRST
t305
2nd.In Bit
Last.In Bit
GAPGCFT00946
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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Doc ID 8673 Rev. 3
ST10F280
Electrical characteristics
Slave mode
VCC = 5 V ±10%, VSS = 0 V, CPU clock = 40 MHz, TA = -40°C to 125°C, CL = 50 pF
Symbol
SSC slave timing
Parameter
Maximum Baud
rate=10MBd
(<SSCBR> = 0001h)
Variable Baud rate
(<SSCBR>=0001hFFFFh)
Min.
Max.
Min.
Max.
Unit
Table 53.
t310
SR SSC clock cycle time
100
100
8 TCL
262144
TCL
ns
t311
SR SSC clock high time
40
–
t310/2 - 10
–
ns
t312
SR SSC clock low time
40
–
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
–
39
–
2 TCL +
14
ns
t316
CC
Write data hold after shift
edge
0
–
0
–
ns
t317p
Read data setup time before
SR latch edge, phase error
detection on (SSCPEN = 1)
62
–
4 TCL +
12
–
ns
t318p(1)
Read data hold time after
SR latch edge, phase error
detection on (SSCPEN = 1)
87
–
6 TCL +
12
–
ns
t317
Read data setup time before
SR latch edge, phase error
detection off (SSCPEN = 0)
6
–
6
–
ns
t318
Read data hold time after
SR latch edge, phase error
detection off (SSCPEN = 0)
31
–
2 TCL + 6
–
ns
1. Timing guaranteed by design.
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.
Doc ID 8673 Rev. 3
233/239
Electrical characteristics
ST10F280
Figure 92. SSC slave timing
t310
1)
t311
t312
2)
SCLK
t314
t315
MRST
t313
t315
1st Out Bit
t316
2nd Out Bit
t317 t318
MTSR
1st.In Bit
t315
Last Out Bit
t317 t318
2nd.In Bit
Last.In Bit
GAPGCFT00947
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.
234/239
Doc ID 8673 Rev. 3
ST10F280
Package information
21
Package information
21.1
ECOPACK®
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
PBGA 208 (23 x 23 x 1.96 mm) mechanical data
Figure 93. Package outline PBGA 208 (23 x 23 x 1.96 mm)
000 C
21.2
SEATING
PLANE
C
A2
A3
A1 A
D
D1
e
f
f
U
T
R
P
N
M
L
K
E1 E
J
H
G
F
E
D
C
B
A
e
1 2 3 4 5
6 7 8 9 10 11 12 13 14 15 16 17
A1 BALL PAD CORNER 2
φ b (208 + 25 BALLS)
1. PBGA stands for Plastic Ball Grid Array.
2. The terminal A1 corner must be identified on the top surface of the package by using a corner chamfer, ink
or metallized markings, identation or other feature of package body or integral heastslug. A distinguishing
feature is allowable on the bottom of the package to identify the terminal A1 corner. Exact shape and size
of this feature is optional.
Doc ID 8673 Rev. 3
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Package information
Table 54.
ST10F280
PBGA 208 (23 x 23 x 1.96 mm) mechanical data
Millimeters
Inches (approx)
Dimensions
Min.
A
A1
Max.
Min.
1.960
0.500
0.600
Typ.
Max.
0.077
0.700
0.019
0.024
A2
1.360
0.054
A3
0.560
0.022
0.028
φb
0.600
0.760
0.900
0.024
0.030
0.035
D
22.900
23.000
23.100
0.902
0.906
0.909
D1
E
20.320
22.900
23.000
0.800
23.100
0.902
0.906
E1
20.320
0.800
e
1.270
0.50
f
aaa
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Typ.
1.240
1.340
1.440
0.150
Doc ID 8673 Rev. 3
0.049
0.053
0.909
0.057
0.006
ST10F280
22
Ordering information
Ordering information
Table 55.
Device summary
Order codes
Package
ST10F280
Packing
Temperature range
Tray
PBGA 208 (23 x 23 x 1.96 mm)
ST10F280-Q3TR
-40°C to +125°C
Tape and reel
Doc ID 8673 Rev. 3
237/239
Revision history
23
ST10F280
Revision history
Table 56.
238/239
Document revision history
Date
Revision
Changes
13-Mar-2003
1
Initial release.
29-May-2008
2
Changed document template.
20-Aug-2012
3
Changed document template.
Updated Table 55: Device summary
Doc ID 8673 Rev. 3
ST10F280
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