SH7764 Datasheet, PDF (969/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Bit
Bit Name
5
PBUSY
4 to 2 
Section 21 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 21.4.3, Pipe
Control.
Reserved
These bits are always read as 0. The write value
should always be 0.
Rev. 1.00 Nov. 22, 2007 Page 913 of 1692
REJ09B0360-0100