Renesas R5S72641 User Manual

 

Section 17   I

2

C Bus Interface 3 

R01UH0134EJ0400  Rev. 4.00  

 

Page 885 of 2108 

Sep 24, 2014 

 

 

 
SH7262 Group, SH7264 Group 

No

Yes

RDRF=1 ?

No

Yes

RDRF=1 ?

Last receive

 - 1?

Slave receive mode

Clear AAS in ICSR

Clear ACKBT in ICIER to 0

Dummy-read ICDRR

Read RDRF in ICSR

Read ICDRR

Set ACKBT in ICIER to 1

Read ICDRR

Read RDRF in ICSR

Read ICDRR

End

No

Yes

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

[10]

[1]  Clear the AAS flag.

[2]  Set acknowledge to the transmit device.

[3] Dummy-read 

ICDRR.

[4]  Wait  for 1 byte to be received.

[5]  Check whether it is the (last receive - 1).

[6]  Read the receive data.

[7]  Set acknowledge of the last byte.

[8]  Read the (last byte - 1) of receive data.

[9]  Wait the last byte to be received.

[10] Read for the last byte of receive data. 

Note:  When the size of receive data is only one byte in 
          reception, steps [2] to [6] are skipped after 
          step [1], before jumping to step [7]. The step [8] 
          is dummy-read in ICDRR.