Preliminary User’s Manual U16315EJ1V0UD
36
CHAPTER 2 PIN FUNCTIONS
2.1 Pin Function List
(1) Port pins
Pin Name
I/O
Function
After Reset
Alternate Function
P00
TI000
P01
TI010/TO00
P02
−
P03
I/O
Port 0.
4-bit I/O port.
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Input
−
P10
SCK10/TxD0
P11
SI10/RxD0
P12
SO10
P13
TxD6
P14
RxD6
P15
TOH0
P16
TOH1/INTP5
P17
I/O
Port 1.
8-bit I/O port.
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Input
TI50/TO50
P20 to P27
Input
Port 2.
8-bit input-only port.
Input
ANI0 to ANI7
P30 to P32
INTP1 to INTP3
P33
I/O
Port 3.
4-bit I/O port.
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Input
INTP4/TI51/TO51
P60 to P63
I/O
Port 6.
4-bit I/O port (N-ch open drain).
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a mask
option only for mask ROM versions.
Input
−
P70 to P77
I/O
Port 7.
8-bit I/O port.
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Input
KR0 to KR7
P120
I/O
Port 12.
1-bit I/O port.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Input
INTP0
P130
Output
Port 13.
1-bit output-only port.
Output
−
P140
I/O
Port 14.
1-bit I/O port.
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Input
PCL/INTP6