SH7080 Datasheet, PDF (831/1644 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 15 Serial Communication Interface (SCI)
Figure 15.13 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 15.13 Example of SCI Receive Operation
Transmitting and Receiving Serial Data Simultaneously (Clock Synchronous Mode): Figure
15.14 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. 3.00 May 17, 2007 Page 773 of 1582
REJ09B0181-0300