Rev. 1.0, 02/00, page 456 of 1141
SCK1 output pin
TE bit
SO1 output pin
Port input/output
High output
Port 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 standby
Exit from
standby
Figure 22.25 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
Port
Port
Note:
*
Initialized by software standby.
SCK1 output pin
TE bit
SO1 output pin
SCI TxD
output
Start of transmission
End of
transmission
Transition
to standby
Exit from
standby
Figure 22.26 Synchronous Transmission Using Internal Clock