SH7670 Datasheet, PDF (763/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Bit
Bit Name
5
PBUSY
4 to 2 
Section 17 USB 2.0 Host/Function Module (USB)
Initial
Value R/W
0
R
All 0 R
Description
Pipe Busy
This bit indicates whether the relevant pipe is used or
not for the transaction.
0: The relevant pipe is not used for the transaction.
1: The relevant pipe is used for the transaction.
This module modifies this bit from 0 to 1 upon start of
the USB transaction for the pertinent pipe, and
modifies the bit from 1 to 0 upon completion of one
transaction.
Reading this bit after software has set PID to NAK
allows checking that modification of the pipe settings
is possible.
For details, refer to (1) Pipe Control Register
Switching Procedures under section 17.4.3, Pipe
Control.
Reserved
These bits are always read as 0. The write value
should always be 0.
Rev. 1.00 Nov. 14, 2007 Page 737 of 1262
REJ09B0437-0100