ST72371 Datasheet, PDF (4/94 Pages) STMicroelectronics – 8-BIT MCUs WITH 16K ROM/OTP/EPROM,512 BYTES RAM, ADC, DAC (PWM), TIMER, I2C AND SCI

ST72371/ST72372
1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The ST72371/ST72372 HCMOS Microcontroller
Units are members of the ST7 family. These devic-
es are based on an industry standard 8-bit core
and feature an enhanced instruction set. The proc-
essor runs with an external clock up to 24 MHz
with a 5.5V supply. Under software control the
ST72371/ST72372 can be placed in WAIT, SLOW
or HALT modes thus reducing power consump-
tion. The enhanced instruction set and addressing
modes afford real programming potential.
Figure 1. ST72371/ST72372 Block Diagram
In addition to standard 8-bit data management the
ST7 features true bit manipulation, 8x8 unsigned
multiplication and indirect addressing modes on
the whole memory.
The devices include an on-chip oscillator, CPU,
16K bytes program memory, 512 bytes RAM, 23 to
32 I/O lines, a Timer with 2 Input Captures and 2
Output Compares (with 1 output pin), a 4 to 8
channel A/D Converter, an I²C multi Master, an
SCI⁽¹⁾ Serial Communications Interface, a Watch-
dog Reset, four 10-bit and one 12-bit D/A Convert-
er channels with PWM output.
RESET
OSCIN
OSCOUT
V_DD
V_SS
RAM
(512 Bytes)
PROGR AM
MEMORY
(16K Bytes)
CONTROL
8-BIT CORE
ALU
W ATCHDOG
Internal
OSC
:3
Mode
Selection
CLOCK
POWER SUPPLY
PORT A
PORT B
ADC
PORT C
I2C
SCI⁽¹⁾
TIMER
PORT D
PWM (DAC)
(1)_{ST72371N only}
PA0-PA7
(8 bits for ST72371N)
(6 bits for ST72372J)
PB0-PB 7
(8 bits for ST72371N)
(4 bits for ST72372J)
PC0-P C7
(8 bits for ST72371N)
(6 bits for ST72372J)
ICAP1
ICAP2
PD0-PD7
(8 bits for ST72371N)
(7 bits for ST72372J)
DA0-DA4
VR02120E
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