isp1122 NXP Semiconductors, isp1122 Datasheet - Page 12

• Manufacturer Part Number: isp1122
• Description: Isp1122 Universal Serial Bus Stand-alone Hub
• Manufacturer: NXP Semiconductors

9. Host requests
Table 7:
Philips Semiconductors
9397 750 07002
Product specification
Request name
Address
Set Address
Configuration
Get Configuration
Set Configuration (0)
Set Configuration (1)
Descriptor
Get Configuration
Descriptor
Get Device Descriptor
Get String Descriptor (0)
Get String Descriptor (1)
Get String Descriptor (2)
Standard USB requests
9.1 Standard requests
bmRequestType
byte 0 [7:0]
(Bin)
X000 0000
1000 0000
X000 0000
X000 0000
1000 0000
1000 0000
1000 0000
1000 0000
1000 0000
Table 6:
The ISP1122 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.
Table 7
unsupported. All other requests will be responded with a STALL packet.
Bit
0
1
2
3
4
5
6
7
Symbol
Hub SC
Port 1 SC
Port 2 SC
Port 3 SC
Port 4 SC
Port 5 SC
reserved
reserved
shows the supported standard USB requests. Some requests are explicitly
Status Change byte: bit allocation
bRequest
byte 1
(Hex)
05
08
09
09
06
06
06
06
06
Rev. 03 — 29 March 2000
Description
a logic 1 indicates a status change on the hub’s upstream port
a logic 1 indicates a status change on downstream port 1
a logic 1 indicates a status change on downstream port 2
a logic 1 indicates a status change on downstream port 3
a logic 1 indicates a status change on downstream port 4
a logic 1 indicates a status change on downstream port 5
not used
not used
wValue
byte 2, 3
(Hex)
address
00, 00
00, 00
01, 00
00, 02
00, 01
03, 00
03, 01
03, 02
[1]
wIndex
byte 4, 5
(Hex)
00, 00
00, 00
00, 00
00, 00
00, 00
00, 00
00, 00
00, 00
00, 00
wLength
byte 6, 7
(Hex)
00, 00
01, 00
00, 00
00, 00
length
length
length
length
length
USB stand-alone hub
[2]
[2]
[2]
[2]
[2]
© Philips Electronics N.V. 2000. All rights reserved.
ISP1122
Data
none
configuration
value = 01H
none
none
configuration,
interface and
endpoint
descriptors
device
descriptor
language ID
string
manufacturer
string
product string
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