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UPD77018A Datasheet(PDF) 10 Page - NEC |
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UPD77018A Datasheet(HTML) 10 Page - NEC |
10 / 56 page µPD77018A, 77019 10 1. PIN FUNCTIONS 1.1 Pin Functions • Power supply VDD – +3V power supply GND – Ground • System control Symbol Pin No. I/O Function X1 85 I Clock input / crystal connection pin • The clock signal is connected to X1, when using external clock for system clock. X2 84 _ Crystal connection pin • X2 should be left open when using external clock for system clock. CLKOUT 87 O Internal system clock output RESET 1 I Internal system reset signal input Symbol Pin No. I/O Function 11, 21, 31, 37, 43, 56, 69, 86, 97 10, 20, 30, 36, 42, 55, 68, 83, 96 • Interrupt Symbol Pin No. I/O Function INT4 - INT1 2 - 5 I Maskable external interrupt input • Falling edge detection |
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