SH7205 Datasheet, PDF (1271/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Bit
Bit Name
10
ATREPM
Section 24 USB 2.0 Host/Function Module (USB)
Initial
Value R/W
0
R/W
Description
Auto Response Mode*³
Enables or disables auto response mode for the
pertinent pipe.
When the function controller function is selected and
the pertinent pipe is set 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.
0: Auto response disabled
1: Auto response enabled
Note: For USB communication in auto response
mode, set this bit to 1 while the FIFO buffer is
empty. Do not write to the FIFO buffer during
USB communication in auto response mode.
When the pertinent pipe is for isochronous
transfer, be sure to set this bit to 0.
Rev. 1.00 Mar. 25, 2008 Page 1239 of 1868
REJ09B0372-0100