3817 group

The 3817 group is 8-bit microcomputer based on the 740 family core technology.The 3817 group is designed mainly for VCR timer/function control, and include six 8-bit timers, a fluorescent display automatic display circuit, a PWM function, and an 8-channel A-D converter.

Features of the 3817 group are:(1)basic machine-language instructions:71; (2)the minimum instruction execution time: 0.3 us at 6.3 MHz oscillation frequency; (3)programmable input/output ports:45; (4)high-breakdown-voltage output ports: 32; (5)interrupts: 18 sources, 15 vectors; (6)PWM output circut: 14 bit x 1; (7)A-D converter: 8-bit x 8 channels; (8)timers: 8 bit x 6.

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