ST72101 datasheet(4/85 Pages) STMICROELECTRONICS

4 / 85 page

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ST72101/ST72212/ST72213

1 GENERAL DESCRIPTION

1.1 INTRODUCTION

The ST72101, ST72213 and ST72212 HCMOS

Microcontroller Units are members of the ST7

family. These devices are based on an industry-

standard 8-bit core and feature an enhanced

instruction set. They normally operate at a 16MHz

oscillator frequency. Under software control, the

ST72101, ST72213 and ST72212 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

8-bit data management, the ST72101, ST72213

and ST72212 feature true bit manipulation, 8x8

unsigned multiplication and indirect addressing

modes on the whole memory. The devices include

an on-chip oscillator, CPU, program memory

(ROM/OTP/EPROM versions), RAM, 22 I/O lines

and the following on-chip peripherals: Analog-to-

Digital Converter (ADC) with 6 multiplexed analog

inputs (ST72212 and ST72213 only), industry

standard synchronous SPI serial interface, digital

Watchdog, one or two independent 16-bit Timers,

one featuring an External Clock Input, and both

featuring Pulse Generator capabilities, 2 Input

Captures and 2 Output Compares.

Figure 1. ST72101, ST72213 and ST72212 Block Diagram

8-BIT CORE

ALU

OSCIN

OSCOUT

RESET

PORT B

TIMER A

PORT A

SPI

PORT C

8-BIT ADC 1)

WATCHDOG

PB0 -> PB7

(8 bits)

PC0 -> PC5

(6 bits)

OSC

Internal

CLOCK

CONTROL

RAM

(256 Bytes)

PA0 -> PA7

(8 bits)

VSS

VDD

POWER

SUPPLY

TIMER B

1) ST72213 and ST72212 only

2) ST72212 only

PROGRAM

(4 - 8K Bytes)

MEMORY

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