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Section 15 Serial Communication Interface with FIFO
Page 760 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
Figure 15.9 shows an example of the operation for reception.
RDF
0
0/1
1
1 1
D
0
D
1
D
7
0
0/1
1D
0
D
1
D
7
FER
Serial
data
Start
bit
Data
Parity
bit
Stop
bit
Start
bit
Data
Parity
bit
Stop
bit
RXI interrupt
request
One frame
Data read and RDF flag
read as 1 then cleared to 0
by RXI interrupt handler
ERI interrupt request
generated by receive
error
Idle state
(mark state)
Figure 15.9 Example of Receive Operation
(8-Bit Data, Parity, 1 Stop Bit)
5. When modem control is enabled in channel 3, the RTS signal is output when SCFRDR is
empty. When RTS is 0, reception is possible. When RTS is 1, this indicates that SCFRDR
exceeds the number set for the RTS output active trigger.
Figure 15.10 shows an example of the operation when modem control is used.
RTS
01
0/1
D
0
D
1
D
2
D
7
D
0
D
1
0/1D
7
0
Serial data
RxD
Start
bit
Parity
bit
Start
bit
Parity
bit
Figure 15.10 Example of Operation Using Modem Control (RTS)