Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 1365 of 1823
Jul 31, 2019
RX23W Group 38. Serial Peripheral Interface (RSPIa)
38.3.3.6 Master (Clock Synchronous Operation)/Slave (Clock Synchronous Operation)
(with This MCU Acting as Master)
Figure 38.11 shows a master (clock synchronous operation)/slave (clock synchronous operation) RSPI system
configuration example when this MCU is used as a master. In the master (clock synchronous operation)/slave (clock
synchronous operation) configuration, SSLA0, SSLA1, and SSLA3 of this MCU (master) are not used.
This MCU (master) drives the RSPCKA and MOSIA. The SPI slave drives the MISO.
Figure 38.11 Master (Clock Synchronous Operation)/Slave (Clock Synchronous Operation) Configuration
Example (This MCU = Master)
38.3.3.7 Master (Clock Synchronous Operation)/Slave (Clock Synchronous Operation)
(with This MCU Acting as Slave)
Figure 38.12 shows a master (clock synchronous operation)/slave (clock synchronous operation) RSPI system
configuration example when this MCU is used as a slave. When this MCU is to operate as a slave (clock synchronous
operation), this MCU (slave) drives the MISOA and the SPI master drives the SPCK and MOSI. In addition, SSLA0,
SSLA1, and SSLA3 of this MCU (slave) are not used.
Only in the single-slave configuration in which the SPCMDm.CPHA bit is set to 1, this MCU (slave) can execute serial
transfer.
Figure 38.12 Master (Clock Synchronous Operation)/Slave (Clock Synchronous Operation) Configuration
Example (This MCU = Slave, CPHA = 1)
RSPCK
MOSI
MISO
SSL0
SSL1
SSL2
SPCK
MOSI
MISO
This MCU (master) SPI slave
SSL
RSPCKA
MOSIA
MISOA
SSLA0
SSLA1
SSLA3
RSPCK
MOSI
MISO
SSL0
SSL1
SSL2
SPCK
MOSI
MISO
SSL
SPI master This MCU (slave)
RSPCKA
MOSIA
MISOA
SSLA0
SSLA1
SSLA3

Renesas RX Series Specifications

General

Brand	Renesas
Model	RX Series
Category	Microcontrollers
Language	English