47
CHAPTER 2 PIN FUNCTIONS
(2) Pins other than port pins (1/2)
Pin Name
I/O
Dual-Function Pins
Function
RTP0-RTP3
Output
P00 to P03
Real-time output
NMI
Input
P20
Non-maskable interrupt request input
INTP0
P21/TO00
External interrupt
Capture trigger signal of CC00
INTP1
P22/TO01
request input
Capture trigger signal of CC01
INTP2
P23/TO02
Capture trigger signal of CC02
INTP3
P24/TO03
Capture trigger signal of CC03
INTP4
P25
Conversion start trigger input of A/D converter
INTP5
P26/TI2
–
INTP6
P27/TI3
TO00
Output
P21/INTP0
Timer output from timer/counter
TO01
P22/INTP1
TO02
P23/INTP2
TO03
P24/INTP3
TO10
P30
TO11
P31
TO20
P10
TO21
P11
TO30
P12
TO31
P13
TI2
Input
P26/INTP5
External count clock input to timer/counter 2
TI3
P27/INTP6
External count clock input to timer/counter 3
RxD
Input
P32/SI1
Serial data input (UART0)
RxD2
P35/SI2
Serial data input (UART2)
TxD
Output
P33/SO1
Serial data output (UART0)
TxD2
P36/SO2
Serial data output (UART2)
ASCK
Input
P34/SCK1
Baud rate clock input (UART0)
ASCK2
P37/SCK2
Baud rate clock input (UART2)
SI1
Input
P32/RxD
Serial data input (3-wire serial I/O1)
SI2
P35/RxD2
Serial data input (3-wire serial I/O2)
SO1
Output
P33/TxD
Serial data output (3-wire serial I/O1)
SO2
P36/TxD2
Serial data output (3-wire serial I/O2)
SCK1
I/O
P34/ASCK
Serial clock input/output (3-wire serial I/O1)
SCK2
P37/ASCK2
Serial clock input/output (3-wire serial I/O2)
AD0-AD7
I/O
P40 to P47
Lower multiplexed address/data bus when external memory is connected
AD8-AD15
Note
I/O
P50 to P57
When 8-bit bus is specified
Higher address bus when external memory is connected
When external 16-bit bus is specified
Higher multiplexed address/data bus when external memory is connected
A16-A19
Note
Output
P60 to P63
Higher address bus when external memory is connected
RD
Output
P90
Read strobe to external memory
Note
The number of pins used as address bus pins differs depending on the external address space (refer to
CHAPTER 17 LOCAL BUS INTERFACE FUNCTION
).