INTRODUCTION

The ST72104G, ST72215G, ST72216G and ST72254G devices are members of the ST7 microcontroller family. They can be grouped as follows:

– ST72254G devices are designed for mid-range applications with ADC and I C interface capabilities.

– ST72215/6G devices target the same range of applications but without I C interface.

– ST72104G devices are for applications that do not need ADC and I C peripherals.

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

■ Memories

– 4K or 8K bytes Program memory (ROM and single voltage FLASH) with read-out protection and in-situ programming (remote ISP)

– 256 bytes RAM

■ Clock, Reset and Supply Management

– Enhanced reset system

– Enhanced low voltage supply supervisor with 3 programmable levels

– Clock sources: crystal/ceramic resonator oscillators or RC oscillators, external clock, backup Clock Security System

– Clock-out capability

– 3 Power Saving Modes: Halt, Wait and Slow

■ Interrupt Management

– 7 interrupt vectors plus TRAP and RESET

– 22 external interrupt lines (on 2 vectors)

■ 22 I/O Ports

– 22 multifunctional bidirectional I/O lines

– 14 alternate function lines

– 8 high sink outputs

■ 3 Timers

– Configurable watchdog timer

– Two 16-bit timers with: 2 input captures, 2 output compares, external clock input on one timer, PWM and Pulse generator modes (one only on ST72104Gx and ST72216G1)

■ 2 Communications Interfaces

– SPI synchronous serial interface

– I2C multimaster interface (only on ST72254Gx)

■ 1 Analog peripheral

– 8-bit ADC with 6 input channels (except on ST72104Gx)

■ Instruction Set

– 8-bit data manipulation

– 63 basic instructions

– 17 main addressing modes

– 8 x 8 unsigned multiply instruction

– True bit manipulation

■ Development Tools

– Full hardware/software development package

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