NEC PD75P308 user manual PIN Functions, Port Pins

μPD75P308

1. PIN FUNCTIONS

1.1 PORT PINS

		Also Served							Input/
Pin Name	Input/Output					Function	8-Bit I/O	When Reset	Output
		As							Circuit
									TYPE*1
P00	Input		INT4		4-bit input port (PORT0)				B
P01	Input/Output		SCK						F -A
					Pull-up resistors can be specified in 3-bit		X	Input
P02	Input/Output	SO/SB0			units for the P01 to P03 pins by software.				F -B
P03	Input/Output	SI/SBI							M -C
P10			INT0			With noise elimination function
P11	Input		INT1		4-bit input port (PORT1)		X	Input	B -C
P12			INT2		Internal pull-up resistors can be
					specified in 4-bit units by software.
P13			TI0
P20		PTO0
					4-bit input/output port (PORT2)
P21	Input/Output		—
					Internal pull-up resistors can be		X	Input	E-B
P22			PCL
					specified in 4-bit units by software.
P23			BUZ
P30*2		LCDCL		MD0	Programmable 4-bit input/output port
					(PORT3)
		SYNC		MD1
P31*2	Input/Output				This port can be specified for input/output		X	Input	E-B
P32*2			MD2		in bit units.
					Internal pull-up resistors can be
P33*2			MD3		specified in 4-bit units by software.
					N-ch open-drain 4-bit input/output port
					(PORT4)
P40-43*2	Input/Output		—		Data input/output pin for writing and			High impedance	M-A
					verifying of program memory (PROM)
					(lower 4 bits)		●
					N-ch open-drain 4-bit input/output port
					(PORT5)
P50-P53*2	Input/Output		—		Data input/output pin for writing and			High impedance	M-A
					verifying of program memory (PROM)
					(upper 4 bits)
P60			KR0		Programmable 4-bit input/output port
					(PORT6)
P61			KR1
	Input/Output				This port can be specified for input/output			Input	F -A
P62			KR2		in bit units.
					Internal pull-up resistors can be specified
P63			KR3
					in 4-bit units by software.		●
P70			KR4
					4-bit input/output port (PORT7)
P71	Input/Output		KR5
					Internal pull-up resistors can be			Input	F -A
P72			KR6
					specified in 4-bit units by software.
P73			KR7
BP0			S24
BP1	Output		S25
BP2			S26
BP3			S27		1-bit output port (BIT PORT)		X	*3	G-C
BP4			S28		Shared with a segment output pin.
BP5	Output		S29
BP6			S30
BP7			S31

*1: Circles indicate schmitt trigger inputs.

2:Can directly drive LED.

3:For BP0-7, VLC1 indicated below are selected as the input source.

However, the output level is changed depending on BP0-7 and the VLC1 external circuits.

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