CHAPTER 2 PIN FUNCTIONS
User’s Manual U16898EJ3V0UD
22
(2) Non-port
functions
Pin Name
I/O
Function
After Reset
Alternate-
Function Pin
INTP0
P30/TI000
INTP1
P43/TxD6
INTP2
P31/TI010/TO00
INTP3
Input
External interrupt input for which the valid edge (rising edge,
falling edge, or both rising and falling edges) can be specified
Input
P41
RxD6
Input
Serial data input for asynchronous serial interface
Input
P44
TxD6
Output
Serial data output for asynchronous serial interface
Input
P43/INTP1
TI000
External count clock input to 16-bit timer/event counter 00.
Capture trigger input to capture registers (CR000 and CR010) of
16-bit timer/event counter 00
P30/INTP0
TI010
Input
Capture trigger input to capture register (CR000) of 16-bit
timer/event counter 00
Input
P31/TO00/INTP2
TO00
Output
16-bit timer/event counter 00 output
Input
P31/TI010/INTP2
TOH1
Output
8-bit timer H1 output
Input
P42
ANI0 to ANI3
Input
Analog input of A/D converter
Input
P20 to P23
AV
REF
−
Reference voltage of A/D converter
−
−
RESET
Note
Input
System reset input
−
P34
Note
X1
Note
Input
Connection of crystal/ceramic resonator for system clock
oscillation.
External clock input
−
P121
Note
X2
Note
−
Connection of crystal/ceramic resonator for system clock
oscillation.
−
P122
Note
V
DD
−
Positive power supply
−
−
V
SS
−
Ground potential
−
−
Note
For the setting method for pin functions, see
CHAPTER 17 OPTION BYTE
.
Caution The P121/X1 and P122/X2 pins are pulled down during reset.