isp1521 NXP Semiconductors, isp1521 Datasheet - Page 31

• Manufacturer Part Number: isp1521
• Description: Hi-speed Universal Serial Bus Hub Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
ISP1521_4
Product data sheet
11.3.6 Get port status
Table 30.
This request returns 4 B of data. The first word contains port status bits (wPortStatus),
and the next word contains port status change bits (wPortChange). The contents of
wPortStatus is given in
Table 31.
Table 32.
Bit
17
18 to 31
Bit
0
1
2
3
4
5 to 7
8
9
10
11
12
13 to 15
Bit
0
1
Function
connect status change
port enable or disable change
Function
current connect status
port enabled or disabled
suspend
overcurrent indicator
reset
reserved
port power
low-speed device attached
high-speed device attached
port test mode
port indicator control
reserved
Get hub status response
Get port status response (wPortStatus)
Get port status change response (wPortChange)
Function
overcurrent indicator change
reserved
Rev. 04 — 30 March 2006
Table
31, and the contents of wPortChange is given in
…continued
Value
0
1
0
Value
0
1
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
1
0
Value
0
1
0
1
Description
no change in overcurrent
overcurrent status has changed
-
Description
no device is present
a device is present on this port
port is disabled
port is enabled
port is not suspended
port is suspended
no overcurrent condition exists
an overcurrent condition exists
reset signaling is not asserted
reset signaling is asserted
-
port is in the powered-off state
port is not in the powered-off state
full-speed or high-speed device is
attached
low-speed device is attached
full-speed device is attached
high-speed device is attached
not in port test mode
in port test mode
displays default colors
displays software controlled color
-
Description
no change in the current connect status
change in the current connect status
port is enabled
port is disabled
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Hi-Speed USB hub controller
ISP1521
Table
31 of 55
32.