Figure 16.29 Data Re-Transfer Operation In Sci Transmission Mode; Figure 16.30 Tend Flag Set Timings During Transmission - Renesas H8S/2158 User Manual

nth transfer frame
Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp DE
TDRE
Transfer frorm TDR to TSR
TEND
FER/ERS

Figure 16.29 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 16.30.
I/O data
TXI
(TEND interrupt)
GM = 0
GM = 1
Legend:
Ds : Stat bit
D0 to D7 : Data bits
Dp : Parity bit
DE : Error signal

Figure 16.30 TEND Flag Set Timings during Transmission

Section 16 Serial Communication Interface (SCI, IrDA, and CRC)
Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp
Transfer from TDR to TSR
[2]
[1]
Ds D0 D1 D2 D3
11.0 etu
Re-transfer frame
(DE)
D4 D5 D6 D7 Dp
12.5 etu
Rev. 3.00 Jan 25, 2006 page 451 of 872
(n + 1) th
transfer frame
Ds D0 D1 D2 D3 D4
Transfer from TDR to TSR
[4]
[3]
DE
Guard time
REJ09B0286-0300