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1.2 Microcontroller LC86F3448A/CH04T1232(36 DIP)
1.2.1 Overview
The LC86F3448A are 8-bit single chip microcontrollers with the following on-chip functional blocks:
- CPU Operable at a minimum bus cycle time of 0.424 s
- 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.
SERVICE MANUAL
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