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Section 16 Renesas Serial Peripheral Interface
Page 840 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
(i) Transfer Operation Flowchart
Figure 16.18 is a flowchart illustrating a transfer in SPI operation when this module is used in
master mode.
Copy transmit data from
transmit buffer to shift register
Copy received data from shift
register to receive buffer
Continue serial
transfer
Receive buffer
has a space for
receive data
Receive buffer
has a space for
receive data
Transmit buffer
has transmit data
Start serial transfer
RSPCK stopped
No
Ye s
No
No
YES
YES
YES
YES
No
No
Shorter than data length
Equal to data length
Update command pointer
End of initialization
in master mode
End of transfer
RSPCK cycle count
Receive buffer
has a space for
receive data
Figure 16.18 Transfer Operation Flowchart in Master Mode