Renesas R5S72621 Manual De Usuario

 
Section 26   USB 2.0 Host/Function Module 

Page 1446 of 2108 

 

R01UH0134EJ0400  Rev. 4.00 

 

 Sep 

24, 

2014 

SH7262 Group, SH7264 Group

10 

ATREPM 

0 

R/W 

Auto Response Mode 

Enables or disables auto response mode for the 
pertinent pipe. 

0: Auto response disabled 

1: Auto response enabled 

When the function controller function is selected and 
the pertinent pipe is for bulk transfer, this bit can be 
set to 1. 

When this bit is set to 1, this module responds to the 
token from the USB host as described below. 

(1) When the pertinent pipe is for bulk IN transfer 

(TYPE = 01 and DIR = 1) 

When ATREPM = 1 and PID = BUF, this module 
transmits a zero-length packet in response to the 
IN token.  

This module updates (allows toggling of) the 
sequence toggle bit (DATA-PID) each time this 
module receives the ACK from the USB host (in a 
single transaction, IN token is received, zero-
length packet is transmitted, and then ACK is 
received.).  

In this case, this module does not generate the 
BRDY or BEMP interrupt. 

(2) When the pertinent pipe is for bulk OUT transfer 

(TYPE = 01 and DIR = 0) 

When ATREPM = 1 and PID = BUF, this module 
returns NAK in response to the OUT (or PING) 
token and generates the NRDY interrupt. 

Modify this bit while CSSTS is 0 and PID is NAK. 
Before modifying this bit after modifying the PID bits 
for the corresponding 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.