SH7205 Datasheet, PDF (1166/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 24 USB 2.0 Host/Function Module (USB)
Initial
Bit
Bit Name
Value R/W Description
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.
Note: This bit should be modified while DPRPU and
DPRD are 0.
5
DRPD
0
R/W PORT0 D+/D− Line Pull-Down Control
When the host controller function is selected, setting
this bit to 1 enables pulling down of the D+ and D-
lines of PORT0.
0: Pulling down the lines is disabled.
1: Pulling down the lines is enabled.
4
DPRPU
0
R/W PORT0 D+ Line Resistor Control
When the function controller function is selected,
setting this bit to 1 enables pulling up of the D+ and D-
lines of PORT0.
0: Pulling up the line is disabled.
1: Pulling up the line is enabled.
3 to 1 
All 0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
0
USBE
0
R/W USB Block Operation Enable
Enables or disables operation of the USB block in this
module.
Modifying this bit from 1 to 0 initializes the register bits
listed in tables 24.3 and 24.4.
0: USB block operation is disabled.
1: USB block operation is enabled.
This bit should be modified while SCKE is 1.
When the host controller function is selected, this bit
should be set to 1 after setting DPRD to 1, eliminating
LNST bit chattering, and checking that the USB bus
has been settled.
Note: The DRPD bit should be cleared to 0 when the function controller function is selected.
The DPRPU bit should be cleared to 0 when the host controller function is selected.
Rev. 1.00 Mar. 25, 2008 Page 1134 of 1868
REJ09B0372-0100