Renesas R5S72643 User Manual

 
Section 26   USB 2.0 Host/Function Module 

Page 1478 of 2108 

 

R01UH0134EJ0400  Rev. 4.00 

 

 Sep 

24, 

2014 

SH7262 Group, SH7264 Group

NRDY 

Buffer not ready 
interrupt 

When the host controller function is 
selected: 
  When STALL is received from the 

peripheral side for the issued token

  When a response cannot be 

received correctly from the 
peripheral side for the issued token 
(No response is returned three 
consecutive times or a packet 
reception error occurred three 
consecutive times.) 

  When an overrun/underrun 

occurred during isochronous 
transfer 

When the function controller function is 
selected: 
  When a token is received while the 

PID bits are set to BUF and 
transmission is not enabled for the 
buffer memory 

  When a CRC error or a bit stuffing 

error occurred during data 
reception in isochronous transfer 

  When an interval error occurred 

during data reception in 
isochronous transfer 

Host, function 

NRDYSTS.
PIPENRDY 

BRDY Buffer 

ready 

interrupt 

When the buffer is ready (reading or 
writing is enabled) 

Host, function 

BRDYSYS 
PIPEBRDY 

BCHG Bus 

change 

interrupt 

When a change of USB bus state is 
detected 

Host 

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