NO:
W90P710 Programming Guide
VERSION:
2.1
PAGE:
86
The above information is the exclusive intellectual property of Winbond Electronics and shall not be disclosed,
distributed or reproduced without permission from Winbond.
Table No.: 1200-0003-07-A
6.5.6.4
ResumeDetected Interrupt
This interrupt is set when
Host Controller
detects that a device on the USB bus is asserting a
resume signal. If
Host Controller
is in U
SB
S
USPEND
state, the resume signal will make
Host Controller
automatically enter U
SB
R
ESUME
state. Note that if you want to make
ConnectStatusChange
event
being treated as a resume event, you must have written a
SetRemoteWakeupEnable
command to
HcRhStatus
register.
6.5.6.5
UnrecoverableError Interrupt
The
Host Controller
will raise this interrupt when it detects a system error not related to USB or an
error that cannot be reported in any other way.
HCD
may try to reset
Host Controller
in this case.
6.5.6.6
FrameNumberOverflow Interrupt
The
Host Controller
will raise this interrupt when the MSB bit of
FrameNumber
(bit 15) of
HcFmNumber
register toggles value from 0 to 1 or 1 to 0, and after
HccaFrameNumber
has been
updated. Because the
Host Controller
has only 16-bits frame counter, the
HCD
may want to maintain
a wider range frame counter. If the
HCD
want to maintain a 32-bits frame counter, it can increase the
upper 16-bits value by each two
FrameNumberOverflow
interrupt.
6.5.6.7
RootHubStatusChange Interrupt
When the
OverCurrentIndicatorChange
bit of
HcRhStatus
register, or the
ConnectStatusChange
,
PortEnableStatusChange
,
PortSuspendStatusChange
, or
PortResetStatusChange
bit of
HcRhPortStatus[1/2]
set, the
Host Controller
would raise the
RootHubStatusChange
interrupt.
