Renesas R5S72641 User Manual

 
Section 26   USB 2.0 Host/Function Module 

Page 1420 of 2108 

 

R01UH0134EJ0400  Rev. 4.00 

 

 Sep 

24, 

2014 

SH7262 Group, SH7264 Group

13 CSCLR 

0  R/W*

1

 

C-SPLIT Status Clear for Split Transaction 

When the host controller function is selected, 
setting this bit to 1 clears the CSSTS bit to 0 for the 
transfer using the split transaction. In this case, the 
next DCP transfer restarts with the S-SPLIT. 

0: Invalid 

1: Clears the CSSTS bit to 0. 

When this bit is set to 1, this module clears the 
CSSTS bit to 0. 

For the transfer using the split transaction, to restart 
the next transfer with the S-SPLIT forcibly, set this 
bit to 1. However, for the normal split transaction, 
this module automatically clears the CSSTS bit to 0 
upon completion of the C-SPLIT; therefore, clearing 
the CSSTS bit is not necessary. 

Controlling the CSSTS bit through this bit must be 
done while UACT is 0 and thus communication is 
halted or while no transfer is being performed with 
bus disconnection detected.  

Setting this bit to 1 while CSSTS is 0 has no effect. 

When the function controller function is selected, be 
sure to write 0 to this bit. 

12 CSSTS 

0  R  COMPLETE 

SPLIT 

(C-SPLIT) Status of Split 

Transaction 

Indicates the C-SPLIT status of the split transaction 
when the host controller function is selected. 

0:  START-SPLIT (S-SPLIT) transaction being 

processed or the device not using the split 
transaction being processed 

1:  C-SPLIT transaction being processed 

This module sets this bit to 1 upon start of the C-
SPLIT and clears this bit to 0 upon detection of C-
SPLIT completion. 

When the function controller function is selected, 
the read value is invalid.