HD6473032F16 Datasheet, PDF (516/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Section 13 Serial Communication Interface
Serial clock
Serial data
RDRF
Bit 7 Bit 0
Bit 7 Bit 0 Bit 1
Bit 6 Bit 7
ORER
RXI
request
RXI interrupt
handler reads
data in RDR
and clears
RDRF flag to 0
1 frame
RXI
request
Overrun error,
ERI request
Figure 13.19 Example of SCI Receive Operation
• Transmitting and Receiving Serial Data Simultaneously (Synchronous Mode)
Figure 13.20 shows a sample flowchart for transmitting and receiving serial data
simultaneously and indicates the procedure to follow.
Rev. 3.00 Mar 21, 2006 page 486 of 814
REJ09B0302-0300