
CHAPTER 2 PIN FUNCTIONS
34
User’s Manual U13952EJ3V1UD
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Non-port pins (1/2)
Pin Name
I/O
Function
After Reset
Alternate Function
INTP0
P24/TI0
INTP1
P25/TI1
INTP2
P26/TO5
INTP3
Input
External interrupt input for which the valid edge (rising edge,
falling edge, or both rising and falling edges) can be specified
Input
P27/CPT5
KR0 to KR5
Input
Key return signal detection
Input
P40 to P45
SI
Input
Serial interface serial data input
Input
P22/RxD
SO
Output
Serial interface serial data output
Input
P21/TxD
SCK
I/O
Serial interface serial clock input/output
Input
P20/ASCK
ASCK
Input
Serial clock input for asynchronous serial interface
Input
P20/SCK
RxD
Input
Serial data input for asynchronous serial interface
Input
P22/SI
TxD
Output
Serial data output for asynchronous serial interface
Input
P21/SO
TI0
Input
External count clock input to 8-bit timer (TM00)
Input
P24/INTP0
TI1
Input
External count clock input to 8-bit timer (TM01)
Input
P25/INTP1
TO2
Output
8-bit timer (TM02) output
Input
P23/CMPTOUT0
TO5
Output
16-bit timer (TM50) output
Input
P26/INTP2
CPT5
Input
Capture edge input
Input
P27/INTP3
CMPTOUT0
Output
Comparator output
Input
P23/TO2
CMPIN0
Input
Comparator input
Input
P60/ANI0
CMPREF0
Input
Comparator reference voltage input
Input
P61/ANI1
ANI0
Input
A/D converter analog input
Input
P60/CMPIN0
ANI1
P61/CMPREF0
ANI2 to ANI6
P62 to P66
AVREF
A/D converter reference voltage
AVSS
A/D converter ground potential
AVDD
A/D converter analog power supply
S0 to S15
Output
LCD controller/driver segment signal output
Output
S16 to S19
Input
P93 to P90
S20 to S27
P87 to P80
COM0 to COM3
Output
LCD controller/driver common signal output
Output
VLC0 to VLC2
LCD driving voltage
BIAS
Supply voltage for LCD driving
X1
Input
Connecting crystal resonator for main system clock oscillation
X2
XT1
Input
Connecting crystal resonator for subsystem clock oscillation
XT2
RESET
Input
System reset input
Input