Datasheet

Section 14 Serial Communication Interface (SCI)
Rev.6.00 Sep. 27, 2007 Page 664 of 1268
REJ09B0220-0600
SCK output pin
TE bit
TxD output pin
Port input/output High outputPort input/output High output Start Stop
Start of transmission
End of
transmission
Port input/output
SCI TxD output
Port
SCI TxD
output
Port
Transition
to software
standby
Exit from
software
standby
Figure 14.24 Asynchronous Transmission Using Internal Clock
Port input/output
Last TxD bit held
High output*Port input/output Marking output
Port input/output
SCI TxD output PortPort
Note: * Initialized by software standby.
SCK output pin
TE bit
TxD output pin
SCI TxD
output
Start of transmission
End of
transmission
Transition
to software
standby
Exit from
software
standby
Figure 14.25 Synchronous Transmission Using Internal Clock