MC141555 View Datasheet(PDF) - Motorola => Freescale
Part Name
Description
Manufacturer
MC141555 Datasheet PDF : 16 Pages
| |||
Freescale Semiconductor, Inc.
Offset
7
Field
DeviceRemovable
Size Value
1
00h/20h
8
PortPwrCtrlMask
1
3Eh/
1Eh/
00h
Description
00h: Indicate all the ports connected to this Hub are
removable.
02h: Indicate Port5 is dedicated to internal use and
permanent attached.
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
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 7. Status Change Register
Bit Function
0
Hub status change
1
Port 1 status change
2
Port 2 status change
3
Port 3 status change
4
Port 4 status change
5
Port 5 status change
6-7 Reserved
Value
0
1
0
1
0
1
0
1
0
1
0
1
00
Description
No status change in Hub
Hub status change detected
No status change in Port 1
Port 1 status change detected
No status change in Port 2
Port 2 status change detected
No status change in Port 3
Port 3 status change detected
No status change in Port 4
Port 4 status change detected
No status change in Port 5
Port 5 status change detected
Default values
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.
MC141555
10
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