Service manual

SERVICE MANUAL
IC DATA AND WAVEFORMS OF KEY POINTS
(continued)
LC86F3248A (D701) 8-Bit Single Chip Microcontroller
1. Overview
The LC863264/56/48/40A 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:64K/56K/48K/40K bytes
CGROM:16K bytes
-On-chip ROM capacity: 640 bytes
-OSD RAM: 352×9 bits
-Closed-Caption TV controller and the on-screen display controller
-Closed-Caption data slicer
-Four channels×8-bit AD Converter
-Three channels×7-bit PWM
-Two16-bit timer/counters, 14-bit base timer
-8-bit synchronous serial interface circuit
-IIC-bus compliant serial interface circuit (Multi-master type)
-ROM correction function
-16-source 10-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
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