Port Functions - NEC PD78081(A) User Manual

Pin Name Input/Output
P00 Input
P01 Input/output
P02
P03
P10-P17 Input/output
P30-P34 Input/output
P35
P36
P37
P50-P57 Input/output
P70 Input/output
P71
P72
P100 Input/output
P101
54
CHAPTER 4 PORT FUNCTIONS
Table 4-1. Port Functions
Port 0 Input only
4-bit input/output port Input/output is specifiable bit-wise. When
used as the input port, it is possible to connect
a pull-up resistor by software.
Port 1
8-bit input/output port
Input/output is specifiable bit-wise.
When used as the input port, it is possible to connect a pull-up resistor
by software.
Port 3
8-bit input/output port
Input/output is specifiable bit-wise.
When used as the input port, it is possible to connect a pull-up resistor
by software.
Port 5
8-bit input/output port
A maximum of 7 out of 8 ports can drive LEDs directly.
Input/output is specifiable bit-wise.
When used as the input port, it is possible to connect a pull-up resistor
by software.
Port 7
3-bit input/output port
Input/output is specifiable bit-wise.
When used as the input port, it is possible to connect a pull-up resistor
by software.
Port 10
2-bit input/output port
Input/output is specifiable bit-wise.
When used as the input port, it is possible to connect a pull-up resistor
by software.
Function Dual-Function Pin
—
INTP1
INTP2
INTP3
ANI0-ANI7
—
PCL
BUZ
—
—
SI2/RxD
SO2/TxD
SCK2/ASCK
TI5/TO5
TI6/TO6