Renesas R5S72623 Manual Do Utilizador

 

 

Section 15   Serial Communication Interface with FIFO 

 

 

Page 764 of 2108 

 

R01UH0134EJ0400  Rev. 4.00 

 

 Sep 

24, 

2014 

SH7262 Group, SH7264 Group

  Transmitting Serial Data (Clock Synchronous Mode) 

Figure 15.13 shows a sample flowchart for transmitting serial data. 

Use the following procedure for serial data transmission after enabling transmit operation. 

Start of transmission

Read TDFE flag in SCFSR

TDFE = 1?

Write transmit data to SCFTDR, 

read TDFE and TEND flags 

in SCFSR as 1, 

and then clear the flags to 0

All data transmitted?

Read TEND flag in SCFSR

TEND = 1?

Clear TE bit in SCSCR to 0

End of transmission

No

Yes

No

Yes

No

Yes

[1]  Status check and transmit data write:

      Read SCFSR and check that the 

TDFE flag is set to 1, then write 
transmit data to SCFTDR. Clear the 
TDFE and TEND flags to 0 after 
reading them as 1.

[2] Serial transmission continuation 

procedure:

      To continue serial transmission, read 

1 from the TDFE flag to confirm that 
writing is possible, then write data to 
SCFTDR, and then clear the TDFE 
flag to 0.

[1]

[2]