MITSUI MTV-DV05, Руководство по обслуживанию

Страница: 22 / 86

SERVICE MANUAL
SERVICE DATA
SERVICE DATA FOR TV UNIT
TECHNICAL DATA OF KEY ICS
CH04T
1227
(D701)
8-Bit Single Chip Microcontroller
1. Overview
The LC86F344BA are 8-bit single chip microcontrollers with the following on-chip functional blocks:
-CPU:Operable at a minimum bus cycle time of 0.424µs
-On-chip ROM capacity
Program ROM:32K/28K/24K/20K/16K bytes
CGROM:16K bytes
-On-chip ROM capacity: 512 bytes
-OSD RAM: 352×9 bits
-Closed-Caption TV controller and the on-screen display controller
-Closed-Caption data slicer
-Four channels×6-bit AD Converter
-Three channels×7-bit PWM
-16-bit timer/counter,14-bit base timer
-IIC-bus compliant serial interface circuit (Multi-master type)
-ROM correction function
-11-source 8-vectored interrupt system
-Integrated system clock generator and display clock generator
Only one X’tal oscillator (32.768kHz) for PLL reference is used for both generators
TV control and the Closed Caption function
All of the above functions are fabricated on a single chip.
21