SH7670 Datasheet, PDF (664/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 17 USB 2.0 Host/Function Module (USB)
Initial
Bit
Bit Name
Value R/W Description
0
USBE
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 17.4 and 17.5.
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.
Table 17.4 Register Bits Initialized by Writing USBE = 0 (when Function Controller
Function is Selected)
Register Name Bit Name
Remarks
SYSSTS
LNST
The value is retained when the host controller
function is selected.
DVSTCTR
RHST
INTSTS0
DVSQ
The value is retained when the host controller
function is selected.
USBADDR
USBADDR
The value is retained when the host controller
function is selected.
USEREQ
BRequest, bmRequestType The values are retained when the host controller
function is selected.
USBVAL
wValue
The value is retained when the host controller
function is selected.
USBINDX
wIndex
The value is retained when the host controller
function is selected.
USBLENG
wLength
The value is retained when the host controller
function is selected.
Rev. 1.00 Nov. 14, 2007 Page 638 of 1262
REJ09B0437-0100