R01UH0823EJ0100 Rev.1.00
Page 1357 of 1823
Jul 31, 2019
RX23W Group
38. Serial Peripheral Interface (RSPIa)
SPNDEN Bit (RSPI Next-Access Delay Enable)
The SPNDEN bit sets the period from the time the RSPI in master mode terminates a serial transfer and sets the SSLAi
signal inactive until the RSPI enables the SSLAi signal assertion for the next access (next-access delay). If the SPNDEN
bit is 0, the RSPI sets the next-access delay to 1 RSPCK + 2 PCLK. If the SPNDEN bit is 1, the RSPI inserts a next-
access delay in compliance with the SPND setting.
When using the RSPI in slave mode, the SPNDEN bit should be set to 0.
SLNDEN Bit (SSL Negation Delay Setting Enable)
The SLNDEN bit sets the period from the time the RSPI in master mode stops RSPCK oscillation until the RSPI sets the
SSLAi signal inactive (SSL negation delay). If the SLNDEN bit is 0, the RSPI sets the SSL negation delay to 1 RSPCK.
If the SLNDEN bit is 1, the RSPI negates the SSL signal at an SSL negation delay in compliance with the SSLND
setting.
When using the RSPI in slave mode, the SLNDEN bit should be set to 0.
SCKDEN Bit (RSPCK Delay Setting Enable)
The SCKDEN bit sets the period from the point when the RSPI in master mode activates the SSLAi signal until the
RSPCK starts oscillation (RSPI clock delay). If the SCKDEN bit is 0, the RSPI sets the RSPCK delay to 1 RSPCK. If the
SCKDEN bit is 1, the RSPI starts the oscillation of RSPCK at an RSPCK delay in compliance with the SPCKD setting.
When using the RSPI in slave mode, the SCKDEN bit should be set to 0.