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参数资料
| 型号： | YMF744B |
| 厂商： | Electronic Theatre Controls, Inc. |
| 英文描述： | DS-1S |
| 中文描述： | 的DS - 1秒 |
| 文件页数： | 21/60页 |
| 文件大小： | 303K |
| 代理商： | YMF744B |
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YMF744B
February 3, 1999
-28-
51h: Next Item Pointer
Read Only
Default: 00h
Access Bus Width: 8, 16, 32-bit
b7
b6
b5
b4
b3
b2
b1
b0
Next Item Pointer
b[7:0] ..........Next Item Pointer
DS-1S does not provide other new capability besides Power Management.
This register is hardwired to
00h.
52-53h: Power Management Capabilities
Read Only
Default: 0401h
Access Bus Width: 8, 16, 32-bit
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
-
D2S
-
Version
b[2:0] ..........Version
These bits contain the revision number of the Power Management Interface Specification.
They are
hardwired to 001b.
b10..............D2S: D2 Support
This bit indicates that DS-1S support “D2” of the power state.
It is hardwired to “1”.
54-55h: Power Management Control / Status
Read / Write
Default: 0000h
Access Bus Width: 8, 16, 32-bit
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
-
PS
b[1:0] ..........PS: Power State
These bits determine the power state of DS-1S.
DS-1S supports the following power states:
“0”:
D0
“1”:
D1
(not supported)
“2”:
D2
“3”:
D3hot
When the power state is changed from D3hot to D0, DS-1S resets the PCI Configuration register 00-3Fh.
DS-1S transits to D0 Uninitialized state.
Though the power state of this register is changed, the power consumption of DS-1S is not changed.
To
support low power, Windows driver controls DS-1S Power Control Register.
DS-1S can support the power state of D0, D1, D2 and D3 with ACPI.
In this case, set ACPI bit (58-59h:
ACPI Mode Register) to “1” to disable Capabilities of PCI Bus Power Management.
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