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20.3.7
SCI Input/Output Timing
SCI timing is shown as follows:
• SCI input clock timing
Figure 20.20 shows the SCI input clock timing.
• SCI input/output timing (synchronous mode)
Figure 20.21 shows the SCI input/output timing in synchronous mode.
SCK
to SCK
0
SCK
to
0
SCK
2
TxD
to TxD
0
2
(transmit
data)
RxD
to RxD
0
2
(receive
data)
Figure 20.21 SCI Input/Output Timing in Synchronous Mode
t
SCKW
2
Figure 20.20 SCI Input Clock Timing
t
Scyc
t
TXD
t
SCKr
t
Scyc
t
t
RXS
RXH
t
SCKf
607
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