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27.1.1999
4A0701GB.__1
6
Product: TDP-52-SN3 (Sigma Gold) / OA0701 Processor
5.1.3.1 Circuit Diagram Contents
5.1.4 Functions
5.1.4.1 CPU
I304 is itself a processor circuit. It is comprised of CPU, 512*8bit EEPROM,
timers, A/D converters, and both series- and parallel I/O lines. The clock
oscillator is located in the audio circuit and provides the CPU with a 7.2 MHz
clock signal. The CPU divides this by 4 to get timing signal E.
When the processor is operating, RESET = 5V, VCC = 5V, E = 1.8 Mhz, AS, R/
W and A0...A15 pulses should be 0/5V (no intermediate values, only 0 or 5V).
OA0701A module connector pins
OA0701B power supply
OA0701C cpu, ASIC, RAM, EPROM
OA0701D audio parts
OA0701E SIS-function