SH7137 Datasheet, PDF (609/1160 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 14 Serial Communication Interface (SCI)
Figure 14.15 shows an example of SCI receive operation.
Transfer direction
Synchronization
clock
Serial data
Bit 7
Bit 0
Bit 7
Bit 0
Bit 1
Bit 6 Bit 7
RDRF
ORER
RXI interrupt Data read from SCRDR and RXI interrupt
request
RDRF flag cleared to 0 by RXI request
interrupt handler
One frame
ERI interrupt request
by overrun error
Figure 14.15 Example of SCI Receive Operation
Transmitting and Receiving Serial Data Simultaneously (Clock Synchronous Mode): Figure
14.16 shows a sample flowchart for transmitting and receiving serial data simultaneously.
Use the following procedure for serial data transmission and reception after enabling the SCI for
transmission and reception.
Rev. 2.00 Sep. 10, 2008 Page 583 of 1130
REJ09B0402-0200