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參數(shù)資料
| 型號： | 82C862 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | FireLink USB Dual Controller Quad Port USB |
| 中文描述： | FireLink雙控制器的USB四口USB |
| 文件頁數(shù)： | 37/51頁 |
| 文件大小： | 321K |
| 代理商： | 82C862 |
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FireLink USB
82C862
912-2000-030
Revision 1.0
Page 33
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MEMOFST 40h-43h
HcPeriodicStart Register
Default = 00h
Bits [31:0] correspond to: 40h = [7:0], 41h = [15:8], 42h = [23:16], 43h = [31:24].
- Bits [13:0]
Periodic Start - These bits are used by the List Processor to determine where in a frame the Periodic List processing must
begin.
- Bits [31:14] Reserved
MEMOFST 44h-47h
HcLSThreshold Register
Default = 00h
Bits [31:0] correspond to: 44h = [7:0], 45h = [15:8], 46h = [23:16], 47h = [31:24].
- Bits [11:0]
LS Threshold - These bits contain a value used by the Frame Management Block to determine whether or not a low speed
transaction can be started in the current frame.
- Bits [31:12] Reserved
MEMOFST 48h
HcRhDescriptorA Register - Byte 0 (RO)
Default = 02h
Number Downstream Ports - The USB core supports two downstream ports.
MEMOFST 49h
HcRhDescriptorA Register - Byte 1
Default = 00h
Reserved
No Over-
current
Protection:(1)
0 = Over-
current
status is
reported
1 = Over-
current
status is not
reported
Over-current
Protection
Mode:
0 = Global over-
current
1 = Individual
Over-
Current
This bit is only
valid when bit 4
is cleared.
This bit should
be written to 0.
Device Type
(RO):
The USB core
is not a
compound
device.
No Power
Switching:(1)
0 = Ports are
powered
switched
1 = Ports are
always
powered on
Power
Switching
Mode:
0 = Global
switching
1 = Individual
switching
This bit is only
valid when bit 1
is cleared.
This bit should
be written to 0.
(1) Bits 4 and 1 should be written to support the external system port over-current and switching implementations.
MEMOFST 4Ah
HcRhDescriptorA Register - Byte 2
Default = 00h
Reserved
MEMOFST 4Bh
HcRhDescriptorA Register - Byte 3
Default = 01h
Power-On to Power-Good Time
- The USB core power switching is effective within 2ms. The field value is represented as the number of 2ms intervals. This field should
be written to support the system implementation. This field should always be written to a non-zero value.
MEMOFST 4Ch-4Dh
HcRhDescriptorB Register - Bytes 0 & 1
Default = 00h
Bits [15:0] correspond to: 4Ch = [7:0], 4Dh = [15:8].
- Bit 0
Reserved
- Bits [15:1]
Device Removable - USB core ports default to removable devices:
0 = Device not removable
1 = Device removable
Bit 15 corresponds to Port 15, Bit 14 corresponds to Port 14, the remaining bits follow suit. Unimplemented ports are
reserved.
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