HD64F2638F20J Datasheet, PDF (540/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 13 Serial Communication Interface (SCI)
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Figure 13-11 shows an example of SCI operation for transmission using the multiprocessor
format.
Start
1 bit
0 D0 D1
Data
Multi-
proce-
ssor Stop
bit bit
Start
bit
Data
Multi-
proces- Stop
sor bit bit 1
D7 0/1 1 0 D0 D1
D7 0/1
1 ^{Idle state}
(mark state)
TDRE
TEND
TXI interrupt
request generated
Data written to TDR
and TDRE flag cleared to
0 in TXI interrupt service
routine
TXI interrupt
request generated
1 frame
TEI interrupt
request generated
Figure 13-11 Example of SCI Operation in Transmission
(Example with 8-Bit Data, Multiprocessor Bit, One Stop Bit)
• Multiprocessor serial data reception
Figure 13-12 shows a sample flowchart for multiprocessor serial reception.
The following procedure should be used for multiprocessor serial data reception.
Page 490 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010