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GENERAL DESCRIPTION

INTRODUCTION

The ST7285C HCMOS Microcontroller Unit is a member of the ST7 family of Microcontrollers dedicated to car radio applications with RDS capability. The device is based on an industry-standard 8-bit core and features an enhanced instruction set.

■ 4.5V to 5.5V Supply Operating Range

■ Operates at 8.664MHz Oscillator Frequency for RDS compatibility

■ Fully Static operation

■ -40°C to + 85°C Maximum Operating Temperature Range

■ Run, Wait, Slow, Halt and RAM Retention modes

■ User ROM: 48 Kbytes

■ Data RAM: 3 Kbytes, including 128 byte stack

■ 80 pin plastic package

■ 62 multifunctional bidirectional I/O lines:

– Programmable Interrupt inputs on some I/Os

– 8 Analog inputs

– EMI filtering

■ Two 16-bit Timers, each featuring:

– 2 Input Captures

– 2 Output Compares

– External Clock input (on Timer A)

– PWM and Pulse Generator modes

■ RDS Radio Data System Filter, Demodulator and GBS circuits

■ 8-bit Analog-to-Digital converter with 8 channel analog multiplexer

■ Digital Watchdog

■ Two SPI Serial Peripheral Interfaces

■ SCI Serial Communications Interface

■ Full I2C multiple Master/Slave interface

■ 2KHz Beep signal generator

■ Master Reset and Power-On Reset

■ 8-bit Data Manipulation

■ 63 Basic Instructions

■ 17 main Addressing Modes

■ 8 x 8 Unsigned Multiply Instruction

■ True Bit Manipulation

■ Complete Development Support on PC/DOS/ WindowsTM Real-Time Emulator

■ Full Software Package (C-Compiler, Cross-Assembler, Debugger)