NHE6300ESB S L7XJ Intel, NHE6300ESB S L7XJ Datasheet - Page 521
NHE6300ESB S L7XJ
Manufacturer Part Number
NHE6300ESB S L7XJ
Description
Manufacturer
Intel
Datasheet
1.NHE6300ESB_S_L7XJ.pdf
(848 pages)
Specifications of NHE6300ESB S L7XJ
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11—Intel
Table 420. PORTSC- Port N Status and Control (Sheet 4 of 4)
November 2007
Order Number: 300641-004US
Bits
Default Value:
4
3
2
1
0
Device:
®
Offset:
Connect Status Change
Current Connect Status
Port Enabled/Disabled
6300ESB ICH
Port Enable/Disable
Overcurrent Active
Change
29
Port 0:CAPLENGTH+44-47h
Port 1: CAPLENGTH+48-4Bh
Port 2: CAPLENGTH+4C-4Fh
Port 3: CAPLENGTH+50-53h
00003000h
Name
Default = 0. 1 = This port currently has an over-current
condition.
0 = This port does not have an over-current condition. This
bit will automatically transition from a ’1’ to a ’0’ when the
over current condition is removed.
The Intel
the over-current active bit is ‘1’.
0 = No change in status. This is the default setting.
1 = Port enabled/disabled status has changed.
For the root hub, this bit gets set to a ’1’ only when a port is
disabled due to the appropriate conditions existing at the
EOF2 point. (See Chapter 11 of the USB Specification for the
definition of a port error.) This bit is not set due to the
Disabled-to-Enabled transition, nor due to a disconnect.
Software clears this bit by writing a ’1’ to it.
1 = Enable. 0 = Disable. Default = 0. Ports may only be
enabled by the host controller as a part of the reset and
enable. Software cannot enable a port by writing a ’1’ to this
field. Ports may be disabled by either a fault condition
(disconnect event or other fault condition) or by host
software. Note that the bit status does not change until the
port state actually changes. There may be a delay in disabling
or enabling a port due to other host controller and bus
events.
1 = Change in Current Connect Status. 0 = No change.
Default = 0. Indicates a change has occurred in the port’s
Current Connect Status. The host controller sets this bit for
all changes to the port device connect status, even when
system software has not cleared an existing connect status
change. For example, the insertion status changes twice
before system software has cleared the changed condition,
hub hardware will be “setting” an already-set bit (i.e., the bit
will remain set). Software sets this bit to ’0’ by writing a ’1’ to
it.
1 = Device is present on port. 0 = No device is present.
Default = 0. This value reflects the current state of the port,
and may not correspond directly to the event that caused the
Connect Status Change bit (Bit 1) to be set.
®
6300ESB ICH automatically disables the port when
Description
Attribute:
Function:
Size:
7
Read/Write
32-bit
Intel
®
6300ESB I/O Controller Hub
Access
R/WC
R/WC
R/W
RO
RO
521
DS
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