ST72334J2TASLASHXXX datasheet(8/150 Pages) STMICROELECTRONICS

8 / 150 page

ST72334xx-Auto, ST72314xx-Auto, ST72124Jx-Auto

8/150

2 INTRODUCTION

The ST72334J/N-Auto, ST72314J/N-Auto and

ST72124J-Auto devices are members of the ST7

microcontroller family. They can be grouped as fol-

lows:

– ST72334J/N-Auto devices are designed for mid-

range applications with Data EEPROM, ADC,

SPI and SCI interface capabilities.

– ST72314J/N-Auto devices target the same

range of applications but without Data EEPROM.

– ST72124J-Auto devices are for applications that

do not need Data EEPROM and the ADC periph-

eral.

All devices are based on a common industry-

standard 8-bit core, featuring an enhanced instruc-

tion set.

The ST72C334J/N-Auto, ST72C314J/N-Auto and

ST72C124J-Auto versions feature single-voltage

Flash memory with byte-by-byte In-Situ Program-

ming (ISP) capability.

Under software control, all devices can be placed

in Wait, Slow, Active Halt or Halt mode, reducing

power consumption when the application is in idle

or standby state.

The enhanced instruction set and addressing

modes of the ST7 offer both power and flexibility to

software developers, enabling the design of highly

efficient and compact application code. In addition

to standard 8-bit data management, all ST7 micro-

controllers feature true bit manipulation, 8x8 un-

signed multiplication and indirect addressing

modes.

For easy reference, all parametric data is located

in Section 15 on page 108.

Figure 1. General Block Diagram

8-bit CORE

ALU

OSC1

ISPSEL

CONTROL

PROGRAM

(8 or 16 Kbytes)

VSS

RESET

PORT F

PF7,6,4,2:0

(6-bit)

TIMER A

BEEP

PORT A

RAM

(384 or 512 bytes)

PORT C

8-bit ADC

VDDA

VSSA

PORT B

PB7:0

PORT E

PE7:0

SCI

TIMER B

PA7:0

PORT D

PD7:0

SPI

PC7:0

(8-bit)

VDD

EEPROM

(256 bytes)

WATCHDOG

MULTI-OSC

LVD

OSC2

MEMORY

MCC/RTC

CLOCK FILTER

(8-bit for N versions)

(5-bit for J versions)

(8-bit for N versions)

(5-bit for J versions)

(6-bit for N versions)

(2-bit for J versions)

(8-bit for N versions)

(6-bit for J versions)

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