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UPD780031AY Datasheet(PDF) 11 Page - NEC |
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UPD780031AY Datasheet(HTML) 11 Page - NEC |
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11 / 70 page  11 µPD780031AY, 780032AY, 780033AY, 780034AY Data Sheet U14045EJ1V0DS00 3. PIN FUNCTIONS 3.1 Port Pins (1/2) Pin Name I/O Function After Alternate Reset Function P00 I/O Port 0 Input INTP0 P01 4-bit input/output port INTP1 P02 Input/output can be specified in 1-bit units. INTP2 P03 An on-chip pull-up resistor can be connected by means of software. INTP3/ADTRG P10 to P17 Input Port 1 Input ANI0 to ANI7 8-bit input-only port P20 I/O Port 2 Input SI30 P21 6-bit input/output port SO30 P22 Input/output can be specified in 1-bit units. SCK30 P23 An on-chip pull-up resistor can be connected by means of software. RxD0 P24 TxD0 P25 ASCK0 P30 I/O Port 3 N-ch open-drain input/output port Input — P31 7-bit input/output port The mask option can be used to specify the P32 Input/output can be connection of an on-chip pull-up resistor to P30, P31. SDA0 P33 specified in 1-bit units. LEDs can be driven directly. SCL0 P34 An on-chip pull-up resistor can be — P35 connected by means of software. P36 P40 to P47 I/O Port 4 Input AD0 to AD7 8-bit input/output port Input/output can be specified in 1-bit units. An on-chip pull-up resistor can be connected by means of software. The interrupt request flag (KRIF) is set to 1 by falling edge detection. P50 to P57 I/O Port 5 Input A8 to A15 8-bit input/output port LEDs can be driven directly. Input/output can be specified in 1-bit units. An on-chip pull-up resistor can be connected by means of software. P64 I/O Port 6 Input RD P65 4-bit input/output port WR P66 Input/output can be specified in 1-bit units. WAIT P67 An on-chip pull-up resistor can be connected by means of software. ASTB |
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