Renesas R5S72622 Manual De Usuario

 

Section 26   USB 2.0 Host/Function Module 

R01UH0134EJ0400  Rev. 4.00  

 

Page 1529 of 2108 

Sep 24, 2014 

 

 

 
SH7262 Group, SH7264 Group 

Table 26.26 lists the responses to received tokens during bulk transmission and control 
transmission. The USB 2.0 host/function module returns a NYET when an OUT token is received 
while there is only one packet of empty space in the buffer memory, during both bulk transmission 
and control transmission. However, an ACK is returned instead of a NYET even under the above 
conditions when a short packet is received. 

NAK/STALL 

 SETUP 

ACK 

 

 

 IN/OUT/ 

PING 

NAK/STALL 

 

BUF 

 SETUP 

ACK 

 

 

RCV-BRDY1  OUT/PING 

ACK 

If an OUT token is received, a data 
packet is received. 

 

RCV-BRDY2  OUT 

NYET 

Notifies whether a data packet can 
be received 

 

RCV-BRDY2  OUT (Short)

ACK 

Notifies whether a data packet can 
be received 

 

RCV-BRDY2  PING 

ACK 

Notifies that a data packet can be 
received 

 RCV-NRDY 

OUT/PING 

NAK 

Notifies that a data packet cannot be 
received 

 

TRN-BRDY 

IN 

DATA0/DATA1

A data packet is transmitted 

 

TRN-NRDY 

IN 

NAK 

Notifies that a data packet cannot be 
transmitted 

[Legend] 

RCV-BRDY1:  When an OUT/PING token is received, there is space in the buffer memory for two 

or more packets. 

RCV-BRDY2:  When an OUT token is received, there is only enough space in the buffer memory 

for one packet. 

RCV-NRDY: 

When a PING token is received, there is no space in the buffer memory. 

TRN-BRDY: 

When an IN token is received, there is data to be sent in the buffer memory. 

TRN-NRDY: 

When an IN token is received, there is no data to be sent in the buffer memory.