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UPD178004A Datasheet(PDF) 20 Page - NEC |
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UPD178004A Datasheet(HTML) 20 Page - NEC |
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20 / 56 page  20 µPD178004A, 178006A, 178016A, 178018A Figure 5-8. Serial Interface Channel 0 Block Diagram Busy/Acknowledge Output Circuit Output Latch Serial I/O Shift Register 0 (SIO0) Internal Bus Interrupt Request Signal Generator Serial Clock Counter Bus Release/Command/ Acknowledge Detection Circuit Serial Clock Control Circuit Selector Selector Selector SI0/SB0/SDA0/P25 SO0/SB1/SDA1/P26 SCK0/SCL/P27 INTCSI0 fXX/2 to fXX/2 8 Figure 5-9. Serial Interface Channel 1 Block Diagram Internal Bus Interrupt Request Signal Generator Handshake Control Circuit Buffer RAM Serial Clock Control Circuit Selector Serial Counter Serial I/O Shift Register 1 (SIO1) Automatic Data Transmit/ Receive Address Pointer (ADTP) Automatic Data Transmit/Receive Interval Specification Register (ADTI) 5-Bit Counter INTCSI1 f XX/2 to f XX/2 8 SI1/P20 SO1/P21 STB/P23 BUSY/P24 SCK1/P22 Match |
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