HD64F3039F18 Datasheet, PDF (406/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 11 Serial Communication Interface
Figure 11.19 shows an example of SCI receive operation.
Serial clock
Receive direction
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
RXI
request
Overrun error,
ERI request
1 frame
Figure 11.19 Example of SCI Receive Operation
Transmitting and Receiving Serial Data Simultaneously (Synchronous Mode): Figure 11.20
shows a sample flowchart for transmitting and receiving serial data simultaneously and indicates
the procedure to follow.
Rev.3.00 Mar. 26, 2007 Page 382 of 682
REJ09B0353-0300