Datasheet

Section 13 Serial Communication Interface (SCI)
Rev. 3.00 Sep. 28, 2009 Page 304 of 710
REJ09B0384-0300
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 D4Ds
(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] [3]
[3]
Figure 13.26 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,
which is shown in figure 13.27.
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:
D0 to D7:
Dp:
DE:
etu:
Start bit
Data bits
Parity bit
Error signal
Element Time Unit (time taken to transfer one bit)
Figure 13.27 TEND Flag Set Timings during Transmission