r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 602

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

Section 14 Serial Communication Interface (SCI)
14.4.3
In clock synchronous mode, the SCIF transmits and receives data in synchronization with clock
pulses. This mode is suitable for high-speed serial communication.
The SCI transmitter and receiver are independent, so full-duplex communication is possible while
sharing the same clock. Both the transmitter and receiver have a double-buffered structure so that
data can be read or written during transmission or reception, enabling continuous data transfer.
Figure 14.8 shows the general format in clock synchronous serial communication.
Rev. 1.00 Sep. 21, 2007 Page 576 of 1124
REJ09B0402-0100
Figure 14.7 shows an example of the operation for reception.
Serial
data
RDRF
FER
Clock Synchronous Mode
Synchronization
clock
Serial data
Note: * High level except in continuous transfer
1
Figure 14.8 Data Format in Clock Synchronous Communication
Start
bit
0
Don't care
Figure 14.7 Example of SCI Receive Operation
D0
*
D1
One frame
(8-Bit Data, Parity, One Stop Bit)
LSB
Bit 0
Data
D7
One unit of transfer data (character or frame)
Bit 1
RXI interrupt
request
Parity
bit
0/1
Bit 2
Stop
bit
1
Start
bit
Bit 3
0
Data read and RDRF flag
cleared to 0 by RXI
interrupt handler
D0
Bit 4
D1
Data
Bit 5
D7
Bit 6
Parity
bit
0/1
Stop
bit
MSB
ERI interrupt request
generated by framing
error
Bit 7
1
Don't care
*
0/1