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ISP1521 Datasheet(PDF) 32 Page - NXP Semiconductors

Part # ISP1521
Description  Hi-Speed Universal Serial Bus hub controller
PDF  53 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

ISP1521 Datasheet(HTML) 32 Page - NXP Semiconductors

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Philips Semiconductors
ISP1521
Hi-Speed USB hub controller
Product data
Rev. 03 — 24 November 2004
32 of 53
9397 750 13702
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
12.3.6
Get port status
This request returns four bytes of data. The first word contains the port status bits
(wPortStatus), and the next word contains the port status change bits
(wPortChange). The contents of wPortStatus is given in Table 31, and the contents of
wPortChange is given in Table 32.
17
overcurrent indicator change
0
no change in overcurrent
1
overcurrent status has changed
18 to 31
reserved
0
-
Table 30:
Get hub status response…continued
Bit
Function
Value
Description
Table 31:
Get port status response (wPortStatus)
Bit
Function
Value
Description
0
current connect status
0
no device is present
1
a device is present on this port
1
port enabled or disabled
0
port is disabled
1
port is enabled
2
suspend
0
port is not suspended
1
port is suspended
3
overcurrent indicator
0
no overcurrent condition exists
1
an overcurrent condition exists
4
reset
0
reset signaling is not asserted
1
reset signaling is asserted
5 to 7
reserved
0
-
8
port power
0
port is in the powered-off state
1
port is not in the powered-off state
9
low-speed device attached
0
full-speed or high-speed device is
attached
1
low-speed device is attached
10
high-speed device attached
0
full-speed device is attached
1
high-speed device is attached
11
port test mode
0
not in the port test mode
1
in the port test mode
12
port indicator control
0
displays default colors
1
displays software controlled color
13 to 15 reserved
0
-
Table 32:
Get port status change response (wPortChange)
Bit
Function
Value
Description
0
connect status change
0
no change in the current connect status
1
change in the current connect status
1
port enable or disable change
0
port is enabled
1
port is disabled



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