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参数资料
| 型号： | MC141556P |
| 厂商： | MOTOROLA INC |
| 元件分类： | 总线控制器 |
| 英文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PDIP28 |
| 封装： | PLASTIC, DIP-28 |
| 文件页数： | 3/18页 |
| 文件大小： | 159K |
| 代理商： | MC141556P |
MC141556
11
MOTOROLA
STATUS CHANGE REGISTER
The additional endpoint 1 of the Hub Controller supports interrupt transfer which reports the Hub and Port Status Change
Register, as shown in following table. This register contains only one byte.
Table 8. Status Change Register
REQUEST
The Hub Controller will respond to the HOST Request through the endpoint 0 pipe in the way as illustrated in following tables.
If the Hub responses with STALL packet, it means the request is not supported.
7
DeviceRemovable
1
00h/20h
00h: Indicate all the ports connected to this Hub are
removable.
02h: Indicate Port5 is dedicated to internal use and
permanent attached.
8
PortPwrCtrlMask
1
3Eh/
1Eh/
00h
Indicates all the ports connected to this Hub are not
affected by a Ganged-mode power request, Ports
always require SetPortFeature (PORT_POWER) to
control the port’s power state.
3Eh: 5 downstream ports are individual-controlled
1Eh: 4 downstream ports are individual-controlled
00h: all downstream ports are ganged-controlled
Bit
Function
Value
Description
0
Hub status change
0
1
No status change in Hub
Hub status change detected
1
Port 1 status change
0
1
No status change in Port 1
Port 1 status change detected
2
Port 2 status change
0
1
No status change in Port 2
Port 2 status change detected
3
Port 3 status change
0
1
No status change in Port 3
Port 3 status change detected
4
Port 4 status change
0
1
No status change in Port 4
Port 4 status change detected
5
Port 5 status change
0
1
No status change in Port 5
Port 5 status change detected
6-7
Reserved
00
Default values
Offset
Field
Size
Value
Description
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