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ST7285C Datasheet(PDF) 5 Page - STMicroelectronics |
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ST7285C Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 117 page 5/117 ST7285C 1 GENERAL DESCRIPTION 1.1 INTRODUCTION The ST7285C HCMOS Microcontroller Unit is a member of the ST7 family of Microcontrollers ded- icated to car radio applications with RDS capabili- ty. The device is based on an industry-standard 8- bit core and features an enhanced instruction set. The device is normally operated at an 8.664MHz oscillator frequency for RDS compatibility but, thanks to the fully static design, operation is possi- ble down to DC, when RDS functionality is not re- quired. Under software control, theST7285C may be placed in either WAIT, SLOW or HALT modes, thus reducing power consumption. The enhanced instruction set and addressing modes afford real programming potential. In addition to standard 8- bit data management, the ST7285C features true bit manipulation, 8x8 unsigned multiplication and indirect addressing modes. The device includes an on-chip oscillator, CPU, ROM, RAM, 62 I/O lines and the following on-chip peripherals: Analog-to-Digital converter (ADC), two industry standard SPI serial interfaces, a Seri- al Communications Interface, an I2C interface, a digital Watchdog Timer, two independent 16-bit Timers, one featuring an External Clock Input, and both featuring Pulse Generator capabilities, 2 In- put Captures and 2 Output Compares. RDS Filter, Demodulator and GBS circuitry for car radio appli- cations is also included. NOTE: FOR THIS DEVICE, SGS-THOMSON CAN ONLY RECEIVE MOTOROLA S19 FORMAT FOR ROM CODES. Figure 1. ST7285C Block Diagram *On EPROM or OTP versions only. Power on Reset PA0 - PA7 Pin 65..72 PB0 - PB7 Pin 73..80 OSCin OSCout RESET V PP / TEST OSC 8 -BIT CORE ALU VR01735P Internal CLOCK Timer A PORT A PORT B A/D Converter 8 4 SPI B PORT C PC0 - PC7 Pin 5..12 SPI A PORT D I2C SCI 8 RAM 3k RDS FILTER,DEMOD,GBS 8 8 8 Timer B 4 4 2 PD0 - PD7 Pin 13..20 2 PORT E PE0 - PE7 Pin 25..32 8 PORT F PF0 - PF7 Pin 33..40 8 PORT H PORT G PH0 - PH5 Pin 53..58 6 PG0 - PG7 Pin 45..52 8 ROM or EPROM* 48k Watchdog RDScomp MPX RDS fil RDS ref ARS AINT V DD V SS V DDP V SSP V DDA V SSA 2 2 |
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