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参数资料
| 型号： | YMF724 |
| 厂商： | Yamaha Corporation |
| 英文描述： | high performance audio controller for the PCI Bus |
| 中文描述： | 高性能音频控制器的PCI总线 |
| 文件页数： | 19/50页 |
| 文件大小： | 268K |
| 代理商： | YMF724 |
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YMF724F
January 14, 1999
-26-
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-1.
DS-1 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-1 resets the PCI Configuration register 00-3Fh.
DS-1 transits to D0 Uninitialized state.
Though the power state of this register is changed, the power consumption of DS-1 is not changed.
To
support low power, Windows driver controls DS-1 Power Control Register.
DS-1 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.
58-59h: ACPI Mode
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
-
ACPI
b0................ACPI: ACPI Mode Select
This bit select either PCI Bus Power Management or ACPI Mode for power management of DS-1.
“0”: PCI Bus Power Management is used.
CAP bit (06-07h: Status Register) and Capabilities Pointer
(34h) are enabled.
(default)
“1”: ACPI Mode is used.
CAP bit and Capabilities Pointer are hardwired “0”, and disabled.
相关PDF资料 |
PDF描述 |
|---|---|
| YMF724F | high performance audio controller for the PCI Bus |
| YMF724F-V | high performance audio controller for the PCI Bus |
| YMF740C | DS-1L |
| YMF743-S | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| YMF743 | AC97 Revsion2.1 Audio CODEC with Digital Audio I/F(AC97 2.1版音频编解码器（带数字音频接口）) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| YMF724F | 制造商:YAMAHA 制造商全称:YAMAHA CORPORATION 功能描述:high performance audio controller for the PCI Bus |
| YMF724F-V | 制造商:YAMAHA 制造商全称:YAMAHA CORPORATION 功能描述:high performance audio controller for the PCI Bus |
| YMF740C | 制造商:未知厂家 制造商全称:未知厂家 功能描述:DS-1L |
| YMF740CV | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Industrial Control IC |
| YMF743 | 制造商:YAMAHA 制造商全称:YAMAHA CORPORATION 功能描述:AC’97 Revsion2.1 Audio CODEC with Digital Audio I/F |
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