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ISP1122A Datasheet PDF : 48 Pages
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Philips Semiconductors
ISP1122A
USB stand-alone hub
Table 8: Hub specific requests…continued
Request name
bmRequestType
byte 0 [7:0]
(Bin)
Status
Get Hub Status
1010 0000
bRequest
byte 1
(Hex)
00
wValue
byte 2, 3
(Hex)
00, 00
wIndex
byte 4, 5
(Hex)
00, 00
wLength
byte 6, 7
(Hex)
04, 00
Get Port Status
1010 0011
00
Unsupported
Get Bus Status
1010 0011
02
Clear Hub Feature
X010 0000
01
(C_OVER_CURRENT)
Set Hub Descriptor
0010 0000
07
Set Hub Feature
X010 0000
03
(C_LOCAL_POWER)
Set Hub Feature
X010 0000
03
(C_OVER_CURRENT)
00, 00
00, 00
01, 00
XX, XX
00, 00
01, 00
port [4], 00
port [4], 00
00, 00
00, 00
00, 00
00, 00
[1] USB Specification Rev. 1.0 uses 00H, USB Specification Rev. 1.1 specifies 29H.
[2] Returned value in bytes.
[3] Feature selector value, see Table 9.
[4] Downstream port identifier: 1 to N with N = number of enabled ports (2 to 5).
04, 00
01, 00
00, 00
3E, 00
00, 00
00, 00
Data
hub status and
status change
field
port status
STALL
STALL
STALL
STALL
STALL
Table 9: Port feature selectors
Feature selector name
Value (Hex)
PORT_CONNECTION
00
PORT_ENABLE
01
PORT_SUSPEND
02
PORT_OVERCURRENT 03
PORT_RESET
04
PORT_POWER
08
PORT_LOW_SPEED
09
C_PORT_CONNECTION 10
C_PORT_ENABLE
11
C_PORT_SUSPEND
12
C_PORT_OVERCURRENT 13
C_PORT_RESET
14
Set feature
not used
not used
suspends a port
not used
resets and enables a
port
powers on a port
not used
not used
not used
not used
not used
not used
Clear feature
not used
disables a port
resumes a port
not used
not used
powers off a port
not used
clears port connection
change bit
clears port enable
change bit
clears port suspend
change bit
clears port overcurrent
change bit
clears port reset
change bit
9397 750 06986
Preliminary specification
Rev. 01 — 27 March 2000
© Philips Electronics N.V. 2000. All rights reserved.
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