R01UH0823EJ0100 Rev.1.00
Page 60 of 1823
Jul 31, 2019
RX23W Group
1. Overview
Port output
enable 2
POE0#, POE1#, POE3#,
POE8#
Input
Input pins for request signals to place the MTU pins in the high impedance
state.
Realtime clock
RTCOUT
Output
Output pin for the 1-Hz/64-Hz clock.
RTCIC0, RTCIC1
Input
Time capture event input pins.
8-bit timer
TMO0 to TMO2
Output
Compare match output pins.
TMCI0 to TMCI3
Input
Input pins for the external clock to be input to the counter.
TMRI1 to TMRI3
Input
Counter reset input pins.
Serial
communications
interface (SCIg)
Asynchronous mode/clock synchronous mode
SCK1, SCK5, SCK8
I/O
Input/output pins for the clock.
RXD1, RXD5, RXD8
Input
Input pins for received data.
TXD1, TXD5, TXD8
Output
Output pins for transmitted data.
CTS1#, CTS5#, CTS8#
Input
Input pins for controlling the start of transmission and reception.
RTS1#, RTS5#, RTS8#
Output
Output pins for controlling the start of transmission and reception.
Simple I
2
C mode
SSCL1, SSCL5, SSCL8
I/O
Input/output pins for the I
2
C clock.
SSDA1, SSDA5, SSDA8
I/O
Input/output pins for the I
2
C data.
Simple SPI mode
SCK1, SCK5, SCK8
I/O
Input/output pins for the clock.
SMISO1, SMISO5, SMISO8
I/O
Input/output pins for slave transmit data.
SMOSI1, SMOSI5, SMOSI8
I/O
Input/output pins for master transmit data.
SS1#, SS5#, SS8#
Input
Slave-select input pins.
IrDA interface
IRTXD5
Output
Data output pin in the IrDA format.
IRRXD5
Input
Data input pin in the IrDA format.
Serial
communications
interface (SCIh)
Asynchronous mode/clock synchronous mode
SCK12
I/O
Input/output pin for the clock.
RXD12
Input
Input pin for receiving data.
TXD12
Output
Output pin for transmitting data.
CTS12#
Input
Input pin for controlling the start of transmission and reception.
RTS12#
Output
Output pin for controlling the start of transmission and reception.
Simple I
2
C mode
SSCL12
I/O
Input/output pin for the I
2
C clock.
SSDA12
I/O
Input/output pin for the I
2
C data.
Simple SPI mode
SCK12
I/O
Input/output pin for the clock.
SMISO12
I/O
Input/output pin for slave transmit data.
SMOSI12
I/O
Input/output pin for master transmit data.
SS12#
Input
Slave-select input pin.
Extended serial mode
RXDX12
Input
Input pin for data reception by SCIf.
TXDX12
Output
Output pin for data transmission by SCIf.
SIOX12
I/O
Input/output pin for data reception or transmission by SCIf.
I
2
C bus interface SCL
I/O
Input/output pin for I
2
C bus interface clocks. Bus can be directly driven by
the N-channel open drain output.
SDA
I/O
Input/output pin for I
2
C bus interface data. Bus can be directly driven by
the N-channel open drain output.
Table 1.4
Pin Functions (2/4)
Classifications
Pin Name
I/O
Description