Renesas R5S72621 Manual De Usuario
Section 26 USB 2.0 Host/Function Module
R01UH0134EJ0400 Rev. 4.00
Page 1353 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
Bit Bit
Name
Initial
Value R/W
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 26.3 and 26.4.
bits as listed in tables 26.3 and 26.4.
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 DRPD to 1, eliminating
LNST bit chattering, and checking that the USB bus
has been settled.
should be set to 1 after setting DRPD to 1, eliminating
LNST bit chattering, and checking that the USB bus
has been settled.
Table 26.3 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.
function is selected.
DVSTCTR RHST
INTSTS0
DVSQ
The value is retained when the host controller
function is selected.
function is selected.
USBADDR
USBADDR
The value is retained when the host controller
function is selected.
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.
function is selected.
USBINDX
wIndex
The value is retained when the host controller
function is selected.
function is selected.
USBLENG
wLength
The value is retained when the host controller
function is selected.
function is selected.