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GENERAL DESCRIPTION

INTRODUCTION

The ST72334J/N, ST72314J/N and ST72124J devices are members of the ST7 microcontroller family. They can be grouped as follows:

– ST72334J/Ndevices are designed for mid-range applications with Data EEPROM, ADC, SPI and SCI interface capabilities.

– ST72314J/N devices target the same range of applications but without Data EEPROM.

– ST72124J devices are for applications that do not need Data EEPROM and the ADC peripheral.

All devices are based on a common industry standard 8-bit core, featuring an enhanced instruction set.

The ST72C334J/N, ST72C314J/N and ST72C124J versions feature single-voltage FLASH memory with byte-by-byte In-Situ Programming (ISP) capability.

■ 8K or 16K Program memory (ROM or Single voltage FLASH) with read-out protection

■ 256-bytes EEPROM Data memory

■ In-Situ Programming (Remote ISP)

■ Enhanced Reset System

■ Low voltage supply supervisor with 3 programmable levels

■ Low consumption resonator or RC oscillators and by-pass for external clock source, with safe control capabilities

■ 4 Power saving modes

■ Standard Interrupt Controller

■ 44 or 32 multifunctional bidirectional I/O lines:

– External interrupt capability (4 vectors)

– 21 or 19 alternate function lines

– 12 or 8 high sink outputs

■ Real time base, Beep and Clock-out capabilities

■ Configurable watchdog reset

■ Two 16-bit timers with:

– 2 input captures (only one on timer A)

– 2 output compares (only one on timer A)

– External clock input on timer A

– PWM and Pulse generator modes

■ SPI synchronous serial interface

■ SCI asynchronous serial interface

■ 8-bit ADC with 8 input pins

(6 only on ST72334Jx, not available on ST72124J2)

■ 8-bit data manipulation

■ 63 basic instructions

■ 17 main addressing modes

■ 8 x 8 unsigned multiply instruction

■ True bit manipulation

■ Full hardware/software development package