ST ST72141 User Manual
查询ST72141供应商
8-BIT MCU WITH 8K ROM/OTP/EPROM, 256 BYTES RAM,
ELECTRIC-MOTOR CONTROL, ADC, WDG, SPI AND 2 TIMERS
■ User Program Memory (ROM/OTP/EPROM):
8K bytes
■ Data RAM: 256 bytes including 64 bytes of
stack
■ Master Reset and Power-On Reset
■ Run and Power Saving modes
■ Low Voltage Detector (LVD) Reset
■
14 multifunctional bidirectional I/O lines:
– 14 interrupt inputs on 2 independent lines
– 8 analog alternate inputs
– 3 high sink outputs
– 13 alternate functions
– EMI filtering
■ Software or Hardware Watchdog (WDG)
■ Motor Control peripheral featuring:
– 6 PWM output channels
– Emergency pin to force outputs to HiZ state
– 3 analog inputs for rotor position detection
with no need of additional sensors
– Comparator for current control or limitation
■ Two 16-bit Timers, each featuring:
– 2 Input Captures
– 2 Output Compares
– External Clock input
– PWM and Pulse Generator modes
■ Synchronous Serial Peripheral Interface (SPI)
■
8-bit ADC with 8 channels
■ 8-bit Data Manipulation
■ 63 basic Instructions
■ 17 main Addressing Modes
■
8 x 8 Unsigned Multiply Instruction
■ True Bit Manipulation
■ Complete Development Support on DOS/
WINDOWSTMReal-Time Emulator
■
Full Software Package on DOS/WINDOWS
(C-Compiler, Cross-Assembler, Debugger)
TM
ST72141
PRODUCT OVERVIEW
PSDIP32
CSDIP32W
SO34
Device Summary
Features ST72141K2
Program Memory - bytes 8K
RAM (stack) - bytes 256 (64)
Peripherals
Operating Supply 4.5 to 5.5 V
CPU Frequency
Temperature Range - 40°Cto+85°C
Package SO34 - PSDIP32
MotorControl, Watchdog,
Timers, SPI, ADC
8 or 4 MHz
(16 or 8MHz oscillator)
Rev. 1.1
July 1998 1/13
Thisispreliminary information onanewproduct in development orundergoing evaluation.Detailsaresubjecttochangewithout notice.
1
ST72141
1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The ST72141 Microcontroller Unit (MCU) is a
member of the ST7 family of Microcontrollers. The
device is based on an industry-standard 8-bit core
and features an enhanced instruction set. The device is operated at an 8 or 16MHz oscillator frequency. Under software control, the ST72141 may
be placed in either Wait, Slow or Halt modes, thus
reducing power consumption. The enhanced instruction set and addressing modes afford real
programming potential. In addition to standard 8bit data management, the ST72141 features true
bit manipulation, 8x8 unsigned multiplication and
indirect addressing modes. The device includes a
low consumption and fast start on-chip oscillator,
Figure 1.ST72E14 Block Diagram
Internal
OSCIN
OSCOUT
V
DD
V
RESET
SS
OSC
POWER
SUPPLY
CONTROL
CLOCK
DIV
LVD
CPU, ROM/OTP/EPROM, RAM, 14 I/O lines and
the following on-chip peripherals: Analog-to-Digital
converter (ADC) with 8 multiplexed analog inputs,
Motor Control (MTC) peripheral, industry standard
synchronous SPI serial interface, digital Watchdog, two independent 16-bit Timers featuring
Clock Inputs, Pulse Generator capabilities, 2 Input
Captures and 2 Output Compares.
The MTC peripheral is designed to control electric
brushless motors, with or without sensors. An
example of application is givenFigure 2 for 6-step
control of Permanent Magnet Direct Current
(PMDC) motor.
PORT A
ADDRESS A ND DATA BUS
8-BIT ADC
TIMER B
TIMER A
PA7-PA0
(8 bits)
OC1A
2/13
8-BIT CORE
ALU
Program Memory
8KBytes
RAM
256 Bytes
MOTOR CTRL
PORT B
SPI
WATCHDOG
MCO5-MCO0
MCIA-C
MCES
MICCFI
PB5-PB0
(6 bits)
2
Figure 2.Example of a 6-step-controlled Motor
ST72141
ST7
MTC
MCCFI
MCO5-0
MCIB
MCIA
MCIC
6
Current feedback
300V
T0
T2
T4
B
I
T5
6
I
3
I
C
2
T1
I
1
I
4
A
I
5
T3
Step
Switch
T0
T1
T2
T3
T4
T5
Node
A
B
C
300V
150V
0
300V
150V
0
300V
150V
0
Σ
Σ
Σ
Σ
Σ
Σ
Σ
Σ
1
2
3
4
5
6
1
Σ
2
3
3/13
3
ST72141
1.2 PIN DESCRIPTION
Figure 3.34-Pin SO Package Pinout
MCO5
MCO4
MCO3
MCO2
MCO1
MCO0
MCES
MISO / EI2 / PB5
NC
MOSI / EI2 / PB4
SCK/ EI2 /PB3
SS/ EI2 / PB2
EXTCLK_B/ EI2 /PB1
EXTCLK_A/ EI2 /PB0
OSCIN
OSCOUT
RESET
Factory fixed OpenDrain (Push-Pullprogramming notavailable) - HighSink
Figure 4.32-Pin SDIP Package Pinout
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
MCIA
34
MCIB
33
MCIC
32
MCCFI
31
V
30
29
28
27
26
25
24
23
22
21
20
19
18
DD
V
SS
TEST/V
OCP1A
NC
PA7 / AIN7 / EI1/ OCP2A
PA6 / AIN6 / EI1/ ICP1A
PA5 / AIN5 / EI1/ ICP2A
PA4 / AIN4 / EI1/ OCP1B
PA3 / AIN3 / EI1/ OCP2B
PA2 / AIN2 / EI1/ ICP1B
PA1 / AIN1 / EI1/ ICP2B
PA0 / AIN0 / EI1
PP
MCO5
MCO4
MCO3
MCO2
MCO1
MCO0
MCES
MISO / EI2/ PB5
MOSI / EI2/ PB4
SCK/ EI2 / PB3
SS/EI2 / PB2
EXTCLK_B/ EI2 /PB1
EXTCLK_A/ EI2 /PB0
OSCIN
OSCOUT
RESET
Factory fixedOpen Drain(Push-Pull programming not available) - High Sink
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
MCIA
31
MCIB
30
MCIC
29
MCCFI
28
V
27
V
26
TEST/V
25
OCP1A
24
PA7 / AIN7 /EI1 / OCP2A
23
PA6 / AIN6 /EI1 / ICP1A
22
PA5 / AIN5 /EI1/ ICP2A
21
PA4 / AIN4 /EI1/ OCP1B
20
PA3 / AIN3 /EI1/ OCP2B
19
PA2 / AIN2 /EI1/ ICP1B
18
PA1 / AIN1 /EI1/ ICP2B
17
PA0 / AIN0 /EI1
DD
SS
PP
4/13
4
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