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INTRODUCTION

The ST72F325 Flash and ST72325 ROM devices are members of the ST7 microcontroller family designed for mid-range applications.

They are derivatives of the ST72321 and ST72324 devices, with enhanced characteristics and robust Clock Security System.

■ Memories

– 16K to 60K dual voltage High Density Flash (HDFlash) or up to 32K ROM with read-out protection capability. In-Application Programming and In-Circuit Programming for HDFlash devices

– 512 to 2048 bytes RAM

– HDFlash endurance: 100 cycles, data retention: 40 years at 85°C

■ Clock, Reset And Supply Management

– Enhanced low voltage supervisor (LVD) for main supply and auxiliary voltage detector (AVD) with interrupt capability

– Clock sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock

– PLL for 2x frequency multiplication

– Four Power Saving Modes: Halt, Active-Halt, Wait and Slow

– Clock Security System

■ Interrupt Management

– Nested interrupt controller

– 14 interrupt vectors plus TRAP and RESET

– Top Level Interrupt (TLI) pin on 64-pin devices

– 9/6 external interrupt lines (on 4 vectors)

■ Up to 48 I/O Ports

– 48/32/24 multifunctional bidirectional I/O lines

– 34/22/17 alternate function lines

– 16/12/10 high sink outputs

■ 5 Timers

– Main Clock Controller with: Real time base, Beep and Clock-out capabilities

– 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

– 8-bit PWM Auto-reload timer with: 2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector

■ 3 Communications Interfaces

– SPI synchronous serial interface

– SCI asynchronous serial interface

– I2C multimaster interface

■ 1 Analog peripheral (low current coupling)

– 10-bit ADC with up to 16 robust input ports

■ Instruction Set

– 8-bit Data Manipulation

– 63 Basic Instructions

– 17 main Addressing Modes

– 8 x 8 Unsigned Multiply Instruction

■ Development Tools

– Full hardware/software development package

– DM (Debug module)