R01UH0823EJ0100 Rev.1.00
Page 1334 of 1823
Jul 31, 2019
RX23W Group
38. Serial Peripheral Interface (RSPIa)
lists the I/O pins used in the RSPI.
The RSPI automatically switches the I/O direction of the SSLA0 pin. SSLA0 is set as an output when the RSPI is a single
master and as an input when the RSPI is a multi-master or a slave. Pins RSPCKA, MOSIA, and MISOA are
automatically set as inputs or outputs according to the setting of master or slave and the level input on the SSLA0 pin.
Refer to
section 38.3.2, Controlling RSPI Pins
Table 38.2
RSPI Pin Configuration
Channel
Pin Name
I/O
Function
RSPI0
RSPCKA
I/O
Clock I/O
MOSIA
I/O
Master transmit data I/O
MISOA
I/O
Slave transmit data I/O
SSLA0
I/O
Slave selection I/O
SSLA1
Output
Slave selection output
SSLA3
Output
Slave selection output