Renesas R5S72643 User Manual

 

Section 26   USB 2.0 Host/Function Module 

R01UH0134EJ0400  Rev. 4.00  

 

Page 1435 of 2108 

Sep 24, 2014 

 

 

 
SH7262 Group, SH7264 Group 

4 DIR 

0 R/W 

Transfer 

Direction 

Specifies the transfer direction for the selected pipe. 

0: Receiving direction 

1: Sending direction 

When this bit has been set to 0, this module uses the 
selected pipe in the receiving direction, and when 
this bit has been set to 1, this module uses the 
selected pipe in the transmitting direction.   

Modify these bits when the value of CSSTS is 0, the 
PID bits are set to NAK, and no pipe is specified by 
the CURPIPE bits. 

To modify these bits after completing USB 
communication using the selected pipe, write 1 and 
then 0 to ACLRM continuously to clear the FIFO 
buffer assigned to the selected pipe while the 
CSSTS, PID, and CURPIPE bits are in the above-
described state. 

Before modifying these bits after modifying the PID 
bits for the selected pipe from BUF to NAK, check 
that CSSTS and PBUSY are 0. However, if the PID 
bits have been modified to NAK by this module, 
checking PBUSY is not necessary. 

3 to 0 

EPNUM[3:0] 

0000 

R/W 

Endpoint Number 

These bits specify the endpoint number for the 
selected pipe. 

Setting 0000 means unused pipe. 

Modify these bits while CSSTS is 0 and PID is NAK. 

Before modifying these bits after modifying the PID 
bits for the selected pipe from BUF to NAK, check 
that CSSTS and PBUSY are 0. However, if the PID 
bits have been modified to NAK by this module, 
checking PBUSY is not necessary. 

Do not make the settings such that the combination 
of the set values in the DIR and EPNUM bits should 
be the same for two or more pipes (EPNUM = 0000 
can be set for all the pipes).