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TE bit
SCK
output pin
TxD
Port
input/output
output pin
Port
Note: * Initialized in software standby mode
Figure 13.36 Port Pin States during Transition to Software Standby Mode
Read RDRF flag in SSR
Read receive data in RDR
Make transition to
software standby mode
Cancel software standby mode
Change operating mode?
Initialization
Start reception
Figure 13.37 Sample Flowchart for Transition to Software Standby Mode during Reception
Transmission start
Marking output
SCI TxD output
(Internal Clock, Clocked Synchronous Transmission)
Reception
No
RDRF = 1
Yes
RE = 0
No
Yes
Section 13 Serial Communication Interface (SCI)
Transmission end
Last TxD bit retained
[1] Data being received will be invalid.
[1]
[2] Setting of the module stop state is included.
[2]
RE = 1
Rev.2.00 Jun. 28, 2007 Page 523 of 666
Transition to
Software standby
software standby
mode canceled
mode
Port
input/output
Port input/output
Port
REJ09B0311-0200
High output*
SCI
TxD output
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