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TE bit
SCK output pin
TxD output pin
Port input/output
Port
Figure 13-24 Asynchronous Transmission Using Internal Clock
TE bit
SCK output pin
TxD output pin
Port input/output
Port
Note: * Initialized by software standby.
Figure 13-25 Synchronous Transmission Using Internal Clock
494
Start of transmission
High output
Start
SCI TxD output
Start of transmission
Marking output
SCI TxD output
Transition
End of
to software
standby
transmission
Stop
Port input/output
Transition
End of
to software
transmission
standby
Port input/output
Last TxD bit held
Port input/output
Exit from
software
standby
Port input/output
High output
SCI TxD
Port
output
Exit from
software
standby
High output*
SCI TxD
Port
output
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