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UPD78C18 Datasheet(PDF) 15 Page - NEC |
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UPD78C18 Datasheet(HTML) 15 Page - NEC |
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15 / 110 page  15 µPD78C17,78C18 1.3 PIN MASK OPTIONS The µPD78C18 has the following mask options, which can be selected bit-wise according to the application. Pin Name Mask Options PA7 to PA0 PB7 to PB0 PC7 to PC0 PD7 to PD0 PF7 to PF0 RD WR ALE STOP INT1, NMI AVDD AVAREF AVSS AN7 to AN0 Recommended Connection Pin Connect to VDD Connect to VSS or VDD Connect to VDD Connect to VSS Connect to AVSS or AVDD Leave open Connect to VSS or VDD via a resistor Cautions 1. Zero-cross detection function will not operate properly if pull-up resistor is incorporated in PC3. 2. The µPD78C17 has no mask option. 1.4 UNUSED PIN CONNECTIONS PA7 to PA0 PB7 to PB0 PC7 to PC0 Pull-up resistor can be incorporated 5 |
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