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UPD17242MC-XXX-5A4 Datasheet(PDF) 10 Page - NEC |
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UPD17242MC-XXX-5A4 Datasheet(HTML) 10 Page - NEC |
10 / 102 page 10 Data Sheet U15002EJ1V0DS µPD17240, 17241, 17242, 17243, 17244, 17245, 17246 1.1 Pin Function List (2/3) Pin No. Pin Name Function Output Format After Reset 4 P0E0 These pins constitute a 4-bit I/O port that can be set to the input or When key CMOS input 5 P0E1 output mode in 1-bit units. matrix is (when key 6 P0E2 If this port is set to the input mode when a key matrix is used, it used: N-ch matrix is not 7 P0E3 functions as a CMOS input port with a pull-up resistor and can be open-drain, used and no used to input key return signals. If one of the pins of this port when key resistor goes low, the standby mode is released. matrix is not connected) If this port is set to the output mode when a key matrix is used, it used: CMOS functions as an N-ch open-drain output port and can be used to push-pull output key matrix signals. If this port is set to the input mode when a key matrix is not used, it functions as a CMOS input port to/from which a resistor can be connected/disconnected in 1-bit units. If this port is set in the output mode when a key matrix is not used, it functions as a high- current CMOS output port. 8 REM Outputs transfer signal for infrared remote controller. CMOS Low-level Active-high output. push-pull output 9VDD Power supply –– 10 XOUT Connects ceramic resonator for system clock oscillation. – (Oscillation 11 XIN A capacitor (15 pF) for oscillation can be connected by using a stops) mask option. 12 GND Ground –– 13 RESET System reset input. Turns ON pull down resistor if the POC or – Input watchdog timer overflows and if the stack pointer overflows or underflows, and resets the system. Usually, the pull-down resistor is ON. |
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