描述 Description

The CXP81720B/81724B is a CMOS 8-bit microcomputer which consists of A/D converter, serial interface, timer/counter, time-base timer, high precision timing pattern generation circuit, PWM output, 32kHz timer/counter, remote control reception circuit, as well as basic configurations like 8-bit CPU, ROM, RAM and I/O port. They are integrated into a single chip.

Also CXP81720B/81724B provides sleep/stop functions which enables to lower power consumption.

特性 Features

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

— 16-bit arithmetic/multiplication and division/Boolean bit operation instructions

? Minimum instruction cycle 250ns at 16MHz operation (4.5 to 5.5V)

122μs at 32kHz operation (2.7 to 5.5V)

? Incorporated ROM capacity 20K bytes (CXP81720B)

24K bytes (CXP81724B)

? Incorporated RAM capacity 800 bytes

? Peripheral functions

— A/D converter 8 bits, 12 channels, successive approximation method (Conversion time of 20.0μs at 16MHz)

— Serial interface Incorporated 8-bit and 8-stage FIFO, 1 channel (Auto transfer for 1 to 8 bytes)

8-bit clock sync type, 1 channel

— Timer 8-bit timer, 8-bit timer/counter, 19-bit time-base timer 32kHz timer/counter

— High-precision timing pattern generator PPG: maximum of 19 pins, 32 stages programmable

RTG: 5 pins, 2 channels

— PWM/DA gate output PWM: 12 bits, 2 channels (Repetitive frequency 62kHz/16MHz)

DA gate pulse output: 12 bits, 4 channels

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

— PWM output 14 bits, 1 channel

— Remote control reception 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/evaluator CXP81800