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UPD17016 Datasheet(PDF) 22 Page - NEC |
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UPD17016 Datasheet(HTML) 22 Page - NEC |
22 / 324 page µPD17016, 17017 22 1.4 Processing of Unused Pins It is recommended that unused pins be processed as follows: Table 1-1. Processing of Unused Pins Pin Name I/O Mode Recommended Processing Port pins P0A0-P0A3 I/ONote 1 Set general-purpose input port mode by software, and P0B0/SI connect each port pin to VDD or GND via resistorNote 2. P0B1/SO P0B2/SCK P0B3 P0C0-P0C3 P0D0/ADC2-P0D3/ADC5 Input Connect each port pin to GND via resistorNote 2. P0E0/LCD22-P0E3/LCD25 CMOS push-pull output Open P0F0/LCD26-P0F3/LCD29 P1A0-P1A3 I/ONote 1 Set general-purpose input port mode by software, and connect each port pin to VDD or GND via resistorNote 2. P1B0/BEEP CMOS push-pull output Open P1B1/PWM0, P1B2/PWM1 N-ch open drain output Set low-level output by software and leave port pins open. P1B3 P1C0-P1C3 CMOS push-pull output Open P1D0/ADC0, P1D1/ADC1 Input Connect each pin to VDD or GND via resistorNote 2. P1D2/AMIFCNote 3 Set port mode and connect each pin to VDD or GND via P1D3/FMIFCNote 3 resistorNote 2. P2A0 CMOS push-pull output Open CE Input Connect to VDD via resistorNote 2. COM0, COM1 Output Open EO0, EO1 Output Open IC0 – Connect to VDD or GND via resistorNote 2. IC1 – Connect to VDD via resistorNote 2. IC2, IC3 – Open INT0 Input Connect to VDD or GND via resistorNote 2. LCD0/KS0-LCD15/KS15 Output Open LCD16-LCD21 VCOH, VCOL Input Disable PLL by software and leave pins open. Notes 1. The I/O port pins are set in the input mode on power application, execution of the clock stop instruction, or CE reset. 2. If a port pin is externally pulled up (connect to VDD via resistor) or down (connect to GND via resistor) with a high resistance, the pin almost goes into a high-impedance state, and the current consumption (inrush current) of the port pin increases. Generally, the pull-up and pull-down resistances are several 10 k Ω, although they vary depending on the application circuit. 3. Do not set these pins as AMIFC and FMIFC modes; otherwise, the current consumption will increase. Pins other than port pins |
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