h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 444

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 13 Serial Communication Interface (SCI)
The timing for setting the TEND flag depends on the value of the GM bit in SMR. The TEND flag
set timing is shown in figure 13.27.
Rev. 2.00 Dec. 05, 2005 Page 406 of 724
REJ09B0200-0200
TDRE
TEND
FER/ERS
I/O data
TXI
(TEND interrupt)
When GM = 1
When GM = 0
[Legend]
Ds:
D0 to D7:
Dp:
DE:
Figure 13.27 TEND Flag Generation Timing in Transmission Operation
Ds
Transfer to TSR from TDR
D0 D1 D2 D3 D4 D5 D6 D7 Dp DE
Figure 13.26 Retransfer Operation in SCI Transmit Mode
Start bit
Data bits
Parity bit
Error signal
nth transfer frame
Ds
D0
D1
D2
[6]
[7]
Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp
D3
Transfer to TSR from TDR
11.0etu
12.5etu
D4
Retransferred frame
D5
D6
D7
Dp
(DE)
[8]
[9]
Guard
time
DE
Ds D0 D1 D2 D3 D4
Transfer to TSR
Transfer
frame n+1
from TDR