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CHAPTER 2
PIN FUNCTIONS
User’s Manual U12790EJ2V0UD
(1) Port pins (2/2)
Pin Name
I/O
Function
After Reset
Alternate Function
P100
I/O
Port 10.
Input
–
P101
3-bit I/O port.
AMIFC
P102
Can be set to input or output mode in 1-bit units.
FMIFC
P120
I/O
Port 12.
Input
TX0Note
P121
5-bit I/O port.
RX0Note
P122 to P124
Can be set to input or output mode in 1-bit units.
–
P130
Output
Port 13.
Low level
TO50
P131
8-bit output port.
output
TO51
P132 to P137
N-ch open-drain output port (12 V tolerant)
Note
PD178096A, 178098A, and 178F098 only.
(2) Non-port pins (1/2)
Pin Name
I/O
Function
After Reset
Alternate Function
INTP0 to
Input
External maskable interrupt input whose valid edge
Input
P00 to P07
INTP7
(rising edge, falling edge, or both rising and falling edges)
can be specified.
SI0
Input
Serial data input to serial interface.
Input
P25/SB0/SDA0
SI1
P20
SI3
P70
SO0
Output
Serial data output from serial interface.
Input
P26/SB1/SDA1
SO1
P21
SO3
P71
SB0
I/O
Serial data input/output to/from
N-ch open-drain I/O
Input
P25/SI0/SDA0
SB1
serial interface.
P26/SO0/SDA1
SDA0
P25/SI0/SB0
SDA1
P26/SO0/SB1
SCK0
I/O
Serial clock input/output to/from serial interface.
Input
P27/SCL
SCK1
P22
SCK3
P72
SCL
N-ch open-drain I/O
P27/SCK0
STB
Output
Strobe output for serial interface automatic transmission/
Input
P23
reception.
BUSY
Input
Busy input for serial interface automatic transmission/
Input
P24
reception.
VW45
Output
VDD = 4.5 V monitor output
Input
P30
TI00
Input
External count clock input to 16-bit timer (TM0).
Input
P32
TI01
P33
TI50
Input
External count clock input to 8-bit timer (TM50).
Input
P34
TI51
External count clock input to 8-bit timer (TM51).
P35