Datasheet

CHAPTER 2 PIN FUNCTIONS
User’s Manual U18172EJ3V0UD
22
(2) Non-port pins
Pin Name I/O Function After Reset Alternate-
Function Pin
INTP0 P21/ANI1/TI010/
TO00
INTP1
Input External interrupt input for which the valid edge (rising edge,
falling edge, or both rising and falling edges) can be specified
Input
P32
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
P20/ANI0/TOH1
TI010
Input
Capture trigger input to capture register (CR000) of 16-bit
timer/event counter 00
Input
P21/ANI1/TO00/
INTP0
TO00 Output 16-bit timer/event counter 00 output Input P21/ANI1/TI010/
INTP0
TOH1 Output 8-bit timer H1 output Input P20/ANI0/TI000
ANI0 P20/TI000/TOH1
ANI1 P21/TI010/TO00/
INTP0
ANI2
Note
P22/X2
Note
ANI3
Note
Input Analog input of A/D converter
Input
P23/X1
Note
RESET
Note
Input System reset input Input
P34
Note
X1
Note
Input
Connection of crystal/ceramic oscillator for system clock
oscillation.
External clock input
−
P23/ANI3
Note
X2
Note
−
Connection of crystal/ceramic oscillator for system clock
oscillation.
−
P22/ANI2
Note
VDD
−
Positive power supply
− −
VSS
−
Ground potential
− −
Note For the setting method for pin functions, see CHAPTER 15 OPTION BYTE.
Caution The P22/X2/ANI2 and P23/X1/ANI3 pins are pulled down during reset.