SH7670 Datasheet, PDF (733/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 17 USB 2.0 Host/Function Module (USB)
Bit
11
10, 9
Bit Name
SUREQCLR

Initial
Value
0
All 0
R/W
R/W*¹
R
Description
SUREQ Bit Clear
When the host controller function is selected,
setting this bit to 1 clears the SUREQ bit to 0.
0: Invalid
1: Clears the SUREQ bit to 0.
This bit always indicates 0.
Set this bit to 1 through software when
communication has stopped with SUREQ being 1
during the setup transaction. However, for normal
setup transactions, this module automatically clears
the SUREQ bit to 0 upon completion of the
transaction; therefore, clearing the SUREQ bit
through software is not necessary.
Controlling the SUREQ bit through this bit must be
done while UACT is 0 and thus communication is
halted or while no transfer is being performed with
bus disconnection detected.
When the function controller function is selected, be
sure to write 0 to this bit.
Reserved
These bits are always read as 0. The write value
should always be 0.
Rev. 1.00 Nov. 14, 2007 Page 707 of 1262
REJ09B0437-0100