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Philips Semiconductors
9.4 Hub responses
9.4.1 Get device status
9.4.2 Get configuration
9.4.3 Get interface status
9.4.4 Get hub status
9397 750 07002
Product specification
This section describes the hub responses to requests from the USB host.
The hub returns 2 bytes, see
Table 16: Get device status response
Bit #
Function
0
self-powered
1
remote wake-up
2 to 15
reserved
The hub returns 1 byte, see
Table 17: Get configuration response
Bit #
Function
0
configuration value
1 to 7
reserved
The hub returns 2 bytes, see
Table 18: Get interface status response
Bit #
Function
0 to 15
reserved
The hub returns 4 bytes, see
Table 19: Get hub status response
Bit #
Function
0
local power source
1
overcurrent indicator
2 to 15
reserved
16
local power status change
17
overcurrent indicator change 0
18 to 31
reserved
Rev. 03 — 29 March 2000
Table
16.
Value
Description
0
bus-powered
1
self-powered
0
no remote wake-up
1
remote wake-up enabled
0
-
Table
17.
Value
Description
0
device not configured
1
device configured
0
-
Table
18.
Value
Description
0
-
Table
19.
Value
Description
0
local power supply good
1
local power supply lost
0
no overcurrent condition
1
hub overcurrent condition detected
0
-
0
no change in local power status
1
local power status changed
no change in overcurrent condition
1
overcurrent condition changed
0
-
ISP1122
USB stand-alone hub
© Philips Electronics N.V. 2000. All rights reserved.
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