描述 Description

The CXP81720A/81724A is a CMOS 8-bit microcomputer which consists of A/D converter, serial interface, timer/counter, time base timer, vector interruption, high precision timing pattern generation circuit, PWM generator, PWM for tuner, 32kHz timer/event counter, remote control receiving circuit, as well as basic configurations like 8-bit CPU, ROM, RAM and I/O port. They are integrated into a single chip.

特性 Features

? A wide instruction set (213 instructions) which cover various types of data

— 16-bit arithmetic instruction/multiplication and division instructions/boolean bit operation instruction

? Minimum instruction cycle During operation 250ns/16MHz (Supply voltage 4.5 to 5.5V)

During operation 122μs/32kHz

? Incorporated ROM capacity 20K bytes (CXP81720A)

24K bytes (CXP81724A)

? Incorporated RAM capacity 800 bytes

? Peripheral functions

— A/D converter 8-bit, 12-channel, successive approximation system

(Conversion time 20.0μs/16MHz)

— Serial interface Incorporated 8-bit and 8-stage FIFO, 1-channel

(1 to 8 bytes auto transfer)

8-bit serial I/O, 1-channel

— Timer 8-bit timer, 8-bit timer/counter, 19-bit time base timer

32kHz timer/counter

— High precision timing pattern generator PPG 19 pins 32-stage programmable

RTG 5-pins 2-channel

— PWM/DA gate output 12-bit, 2-channel (Repetitive frequency 62kHz/16MHz)

— FRC capture unit Incorporated 26-bit and 8-stage FIFO

— PWM output 14-bit, 1-channel

— Remote control receiving circuit 8-bit pulse measuring counter, 6-stage FIFO

? Interruption 20 factors, 15 vectors, multi-interruption possible

? Standby mode SLEEP/STOP

? Package 100-pin plastic QFP/LQFP

? Piggyback/evaluation chip CXP81800 100-pin ceramic QFP/LQFP