Section 12 Serial Communication Interface (SCI)
Rev. 3.00 Mar. 14, 2006 Page 435 of 804
REJ09B0104-0300
D0 D1 D2 D3 D4 D5 D6 D7 Dp
DE
Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp
(DE)
Ds D0 D1 D2 D3 D4
Ds
(n + 1) th
transfer frame
Retransfer frame
nth transfer frame
TDRE
TEND
[1]
FER/ERS
Transfer from TDR to TSR
Transfer from TDR to TSR
Transfer from TDR to TSR
[2]
[4]
[3]
Figure 12.26 Data Re-Transfer Operation in SCI Transmission Mode
Note that the TEND flag is set in different timings depending on the GM bit setting in SMR.
Figure 12.27 shows the TEND flag set timing.
Ds
D0
D1
D2
D3
D4
D5
D6
D7
Dp
I/O data
12.5 etu
TXI
(TEND interrupt)
11.0 etu
DE
Guard time
GM = 0
GM = 1
[Legend]
Ds: Start
bit
D0 to D7: Data bits
Dp: Parity
bit
DE: Error
signal
Figure 12.27 TEND Flag Set Timing during Transmission
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