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參數(shù)資料
| 型號(hào)： | AT43312 |
| 廠商： | Atmel Corp. |
| 英文描述： | Self- and Bus- Powered USB Hub Controller |
| 中文描述： | 自和總線供電的USB集線器控制器 |
| 文件頁數(shù)： | 7/21頁 |
| 文件大小： | 157K |
| 代理商： | AT43312 |
AT43312
7
Endpoint0
Endpoint0 is the AT43312’s default endpoint used for enu-
meration of the Hub and exchange of configuration infor-
mation and requests between the Host and the AT43312.
Endpoint0 supports control transfers.
The Hub Controller supports the following descriptors:
Device Descriptor, Configuration Descriptor, Interface
Descriptor, Endpoint Descriptor, and Hub Descriptor.
These Descriptors are described in detail on page 9
through page 16 of this document. Standard USB Device
Requests and class-specific Hub Requests are also sup-
ported through Endpoint0. There is no endpoint descriptor
for Endpoint0.
Status Change Register
Endpoint1
Endpoint1, an interrupt endpoint, is used by the Hub Con-
troller to send status change information to the Host.
The Hub Controller samples the changes at the end of
every frame at time marker EOF2 in preparation for a
potential data transfer in the subsequent frame. The sam-
pled information is stored in a byte-wide register, the Status
Change Register, using a bitmap scheme.
Each bit in the Status Change Register corresponds to one
port as shown below:
An IN Token packet from the Host to Endpoint1 indicates a
request for port change status. If the Hub has not detected
any change on its ports, nor any changes in itself, then all
bits in this register will be 0 and the Hub Controller will
return a NAK to requests on Endpoint1. If any of bits 0-4 is
1, the Hub Controller will transfer the whole byte. The Hub
Controller will continue to report a status change when
polled until that particular change has been removed by a
Clear_Port_Feature request from the Host. No status
change will be reported by Endpoint1 until the AT43312
has been enumerated and configured by the Host via
Endpoint0.
Bit
Function
Value
Meaning
0
Hub status change
0
1
No change in status
Change in status detected
1
Port1 status change
0
1
No change in status
Change in status detected
2
Port2 status change
0
1
No change in status
Change in status detected
3
Port3 status change
0
1
No change in status
Change in status detected
4
Port4 status change
0
1
No change in status
Change in status detected
5-7
Reserved
000
Default values
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT43312(32DIP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:BUS CONTROLLER |
| AT43312(32SOIC) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:BUS CONTROLLER |
| AT43312A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AT43312A [Updated 7/03. 27 Pages] |
| AT43312A_06 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Self- and Bus-Bus-powered USB Hub Controller |
| AT43312A-6AC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:BUS CONTROLLER |
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