描述 Description

The CXP85840A/85848A/85856A are the CMOS 8-bit microcomputer integrating on a single chip an A/D converter, serial interface, timer/counter, time-base timer, closed caption decoder, data slicer, on-screen display function, I2C bus interface, PWM output, remote control reception circuit, HSYNC counter and watchdog timer, besides the basic configurations of 8-bit CPU, ROM, RAM, I/O ports.

The CXP85840A/85848A/85856A also provide a power-on reset function and sleep function that enables to lower the power consumption.

特性 Features

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

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

? Minimum instruction cycle 333ns at 12MHz operation

? Incorporated ROM 40K bytes (CXP85840A) 48K bytes (CXP85848A) 56K bytes (CXP85856A)

? Incorporated RAM 2176 bytes (Excludes closed caption decoder and VRAM for on-screen display)

? Peripheral functions

– A/D converter 8-bit 6-channel successive approximation method (Conversion time of 26.7μs at 12MHz)

– Serial interface 8-bit clock sync type, 1 channel

– Timer 8-bit timer

8-bit timer/counter

19-bit time-base timer

– Closed caption decoder Data slicer

Corresponds to FCC (EDS supported), 8 × 13 dots, 192 character types

15 character colors, 4 lines × 34 characters

frame background 15 colors/ half blanking

italic, underline, vertical scrolling

– On-screen display (OSD) function 12 × 16 dots, 192 character types, 15 character colors

2 lines × 24 characters

frame background 8 colors/ half blanking

background on full screen 15 colors/ half blanking

edging and vertical scrolling for every line

jitter elimination circuit

sprite OSD, 12 × 16 dots, 1 screen, 8 colors for every dot

– I2C bus interface

– PWM output 8 bits, 8 channels

– Remote control reception circuit 8-bit pulse measurement counter, 6-stage FIFO

– HSYNC counter 2 channels

– Watchdog timer

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

? Standby mode Sleep

? Package 64-pin plastic SDIP/QFP

? Piggyback/evaluator CXP85890A 64-pin ceramic PSDIP (Supports custom font)