SH7764 Datasheet, PDF (868/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 21 USB 2.0 Host/Function Module (USB)
Initial
Bit
Bit Name
Value R/W Description
7
HSE
0
R/W High-Speed Operation Enable
0: High-speed operation is disabled
When the function controller function is selected:
Only full-speed operation is enabled.
When the host controller function is selected: Only
full-speed operation is enabled.
1: High-speed operation is enabled (detected by this
module)
(1) When the host controller function is selected
When HSE = 0, the USB port performs full-speed
operation.
When HSE = 1, this module executes the reset
handshake protocol, and automatically allows the
USB port to perform high-speed or full-speed
operation according to the protocol execution
result.
This bit should be modified after detecting device
connection (after detecting the ATTCH interrupt)
and before executing a USB bus reset (before
setting USBRESET to 1).
(2) When the function controller function is selected
When HSE = 0, this module performs full-speed
operation.
When HSE = 1, this module executes the reset
handshake protocol, and automatically performs
high-speed or full-speed operation according to
the protocol execution result.
This bit should be modified while DPRPU is 0.
6
DCFM
0
R/W Controller Function Select
Selects the host controller function or function
controller function.
0: Function controller function is selected.
1: Host controller function is selected.
This bit should be modified while DPRPU and DRPD
are 0.
Rev. 1.00 Nov. 22, 2007 Page 812 of 1692
REJ09B0360-0100