ISP1123BD Просмотр технического описания (PDF) - Philips Electronics
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ISP1123BD Datasheet PDF : 49 Pages
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Philips Semiconductors
ISP1123
USB compound hub
10.4.4 Get hub status
The hub returns 4 bytes, see Table 19.
Table 19: Get hub status response
Bit #
Function
Value
0
local power source
0
1
1
overcurrent indicator
0
1
2 to 15 reserved
0
16
local power status change 0
1
17
overcurrent indicator change 0
1
18 to 31 reserved
0
Description
local power supply good
local power supply lost
no overcurrent condition
hub overcurrent condition detected
-
no change in local power status
local power status changed
no change in overcurrent condition
overcurrent condition changed
-
10.4.5 Get port status
The hub returns 4 bytes. The first 2 bytes contain the port status bits (wPortStatus,
see Table 20). The last 2 bytes hold the port status change bits (wPortChange, see
Table 21).
Table 20: Get port status response (wPortStatus)
Bit #
Function
Value Description
0
current connect status
0
no device present
1
device present on this port
1
port enabled/disabled
0
port disabled
1
port enabled
2
suspend
0
port not suspended
1
port suspended
3
overcurrent indicator
0
no overcurrent condition
1
overcurrent condition detected
4
reset
0
reset not asserted
1
reset asserted
5 to 7 reserved
0
-
8
port power
0
port powered off
1
port power on
9
low-speed device attached 0
full-speed device attached
1
low-speed device attached
10 to 15 reserved
0
-
9397 750 06325
Preliminary specification
Rev. 01 — 5 October 1999
© Philips Electronics N.V. 1999. All rights reserved.
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