Section 12 Serial Communication Interface (SCI)
Rev. 3.00 Sep. 27, 2007 Page 461 of 758
REJ09B0243-0300
Figure 12.13 shows an example of SCI receive operation.
Synchronization
clock
Serial data
Bit 7
Bit 0
Bit 7
Bit 0
Bit 1
Bit 6
Bit 7
Data read from SCRDR and
RDRF flag cleared to 0 by RXI
interrupt handler
RDRF
ORER
RXI interrupt
request
RXI interrupt
request
One frame
ERI interrupt request
by overrun error
Transfer direction
Figure 12.13 Example of SCI Receive Operation
Transmitting and Receiving Serial Data Simultaneously (Clock Synchronous Mode):
Figure
12.14 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.
Содержание SH7124 R5F7124
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