Casio 130CR Service Manual page 15

(2) Non-port pins (1/2)
Pin Name I/O
INTP0 I/O External interrupt request inputs with specifiable
INTP1 valid edges (rising edge, falling edge, both rising and
INTP2 falling edges).
INTP3
INTP4
INTP5
SI0 I/O Serial interface serial data input
SI1
SI2
SO0 Output Serial interface serial data output
SO1
SO2
SB0 I/O Serial interface serial data input/output
SB1
SCK0 I/O Serial interface serial clock input/output
SCK1
SCK2
STB Output Serial interface automatic transmit/receive strobe
output
BUSY Input Serial interface automatic transmit/receive busy input
RxD0 Input Asynchronous serial interface serial data input
RxD1
TxD0 Output Asynchronous serial interface serial data output
TxD1
ASCK Input Asynchronous serial interface serial clock input
TI00 Input External count clock input to 16-bit timer (TM0)
TI01 Capture trigger signal input to capture register (CR00)
TI1 External count clock input to 8-bit timer (TM1)
TI2 External count clock input to 8-bit timer (TM2)
TO0 Output 16-bit timer (TM0) output (also used for 14-bit PWM
output)
TO1 8-bit timer (TM1) output
TO2 8-bit timer (TM2) output
PCL Output Clock output (for main system clock and subsystem
clock trimming)
BUZ Output Buzzer output
RTP0 to RTP7 Outpu Real-time output port outputting data in
synchronization with trigger
Function
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After Reset Alternate Function
Input P00/TI00
P01/TI01
P02
P03
P04
P05
Input P25/SB0
P20
P70/RxD
Input P26/SB1
P21
P71/TxD
Input P25/SI0
P26/SO0
Input P27
P22
P72/ASCK
Input P23/TxD1
Input P24/RxD1
Input P70/SI2
P24/BUSY
Input P71/SO2
P23/STB
Input P72/SCK2
P00/INTP0
P01/INTP1
P33
P34
Input P30
P31
P32
Input P35
Input P36
Input P120 to P127