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ISP1122ABD Datasheet(PDF) 12 Page - NXP Semiconductors

No. de pieza ISP1122ABD
Descripción Electrónicos  Universal Serial Bus stand-alone hub
PDF  48 Pages
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Fabricante Electrónico  PHILIPS [NXP Semiconductors]
Página de inicio  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

ISP1122ABD Datasheet(HTML) 12 Page - NXP Semiconductors

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Philips Semiconductors
ISP1122A
USB stand-alone hub
Preliminary specification
Rev. 01 — 27 March 2000
12 of 48
9397 750 06986
© Philips Electronics N.V. 2000. All rights reserved.
9.
Host requests
The ISP1122A handles all standard USB requests from the host via control
endpoint 0. The control endpoint can handle a maximum of 64 bytes per transfer.
Remark: Please note that the USB data transmission order is Least Significant Bit
(LSB) first. In the following tables multi-byte variables are displayed least significant
byte first.
9.1 Standard requests
Table 7 shows the supported standard USB requests. Some requests are explicitly
unsupported. All other requests will be responded with a STALL packet.
Table 6:
Status Change byte: bit allocation
Bit
Symbol
Description
0
Hub SC
a logic 1 indicates a status change on the hub’s upstream port
1
Port 1 SC
a logic 1 indicates a status change on downstream port 1
2
Port 2 SC
a logic 1 indicates a status change on downstream port 2
3
Port 3 SC
a logic 1 indicates a status change on downstream port 3
4
Port 4 SC
a logic 1 indicates a status change on downstream port 4
5
Port 5 SC
a logic 1 indicates a status change on downstream port 5
6
reserved
not used
7
reserved
not used
Table 7:
Standard USB requests
Request name
bmRequestType
byte 0 [7:0]
(Bin)
bRequest
byte 1
(Hex)
wValue
byte 2, 3
(Hex)
wIndex
byte 4, 5
(Hex)
wLength
byte 6, 7
(Hex)
Data
Address
Set Address
X000 0000
05
address [1]
00, 00
00, 00
none
Configuration
Get Configuration
1000 0000
08
00, 00
00, 00
01, 00
configuration
value = 01H
Set Configuration (0)
X000 0000
09
00, 00
00, 00
00, 00
none
Set Configuration (1)
X000 0000
09
01, 00
00, 00
00, 00
none
Descriptor
Get Configuration
Descriptor
1000 0000
06
00, 02
00, 00
length [2]
configuration,
interface and
endpoint
descriptors
Get Device Descriptor
1000 0000
06
00, 01
00, 00
length [2]
device
descriptor
Get String Descriptor (0)
1000 0000
06
03, 00
00, 00
length [2]
language ID
string
Get String Descriptor (1)
1000 0000
06
03, 01
00, 00
length [2]
manufacturer
string
Get String Descriptor (2)
1000 0000
06
03, 02
00, 00
length [2]
product string



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