SH7764 Datasheet, PDF (869/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Bit
Bit Name
5
DRPD
4
DPRPU
3 to 1 
0
USBE
Section 21 USB 2.0 Host/Function Module (USB)
Initial
Value
0
0
All 0
0
R/W Description
R/W D+/D− Line Resistor Control
Enables or disables pulling down D+ and D- lines
when the host controller function is selected.
0: Pulling down the lines is disabled.
1: Pulling down the lines is enabled.
This bit should be set to 1 if the host controller
function is selected, and should be set to 0 if the
function controller function is selected.
R/W D+ Line Resistor Control
Enables or disables pulling up D+ line when the
function controller function is selected.
0: Pulling up the line is disabled.
1: Pulling up the line is enabled.
Setting this bit to 1 when the function controller
function is selected allows this module to pull up the
D+ line to 3.3 V, thus notifying the USB host of
connection. Modifying this bit from 1 to 0 allows this
module to cancel pulling up the D+ line, thus notifying
the USB host of disconnection.
This bit should be set to 1 if the function controller
function is selected, and should be set to 0 if the host
controller function is selected.
R
Reserved
These bits are always read as 0. The write value
should always be 0.
R/W USB Module Operation Enable
Enables or disables operation of this module.
0: USB module operation is disabled.
1: USB module operation is enabled.
Modifying this bit from 1 to 0 initializes some register
bits as listed in tables 21.4 and 21.5.
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.
Rev. 1.00 Nov. 22, 2007 Page 813 of 1692
REJ09B0360-0100