R01UH0823EJ0100 Rev.1.00
Page 1042 of 1823
Jul 31, 2019
RX23W Group
33. Serial Communications Interface (SCIg, SCIh)
Figure 33.25
Example of Serial Data Transmission in Clock Synchronous Mode When the CTS Function is Not
Used at the Beginning of Transmission
Figure 33.26
Example of Serial Data Transmission in Clock Synchronous Mode When the CTS Function is
Used at the Beginning of Transmission
Synchronization clock
Serial data
TXI interrupt request
generated
TXI interrupt
request
generated
TXI interrupt flag
(IRn in ICU
*1
)
Data written to TDR in TXI
interrupt handling routine
SSR.TEND flag
SCR.TE bit
Data written to TDR in
TXI interrupt handling
routine
Bit 0
Bit 1
Bit 7
Bit 0
Bit 1
Bit 7
1 frame
Bit 0
TXI interrupt
request generated
Data written to TDR in TXI
interrupt handling routine
TXI interrupt
request
generated
Note 1. Refer to section 15, Interrupt Controller (ICUb) for details on the corresponding interrupt vector number.
Synchronization clock
1 frame
Serial data
TXI interrupt request
generated
TXI interrupt
Request generated
TXI interrupt flag
(IRn in ICU
*1
)
Data written to TDR in
TXI interrupt handling
routine
SSR.TEND flag
Bit 0
Bit 1
Bit 7
Bit 0
CTSn# pin
SCR.TE bit
Data written to TDR in
TXI interrupt handling
routine
TXI interrupt request
generated
Data written to TDR in TXI
interrupt handling routine
Note 1. Refer to section 15, Interrupt Controller (ICUb) for details on the corresponding interrupt vector number.