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YMF754-R 数据表(PDF) 28 Page - YAMAHA CORPORATION

部件名 YMF754-R
功能描述  DS-1E
PDF  60 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  YAMAHA [YAMAHA CORPORATION]
网页  http://www.yamaha.com
标志 YAMAHA - YAMAHA CORPORATION

YMF754-R 数据表(HTML) 28 Page - YAMAHA CORPORATION

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YMF754
June 28, 1999
-28-
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-1E.
DS-1E 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-1E resets the PCI Configuration register 00-3Fh.
DS-1E transits to D0 Uninitialized state.
Though the power state of this register is changed, the power consumption of DS-1E is not changed.
To
support low power, Windows driver controls DS-1E Power Control 1 / DS-1E Power Control 2 / DS-1E
Control / DS-1E Secondary AC’97 Power Control registers.
DS-1E 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-1E.
“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.
5A-5Bh: DS-1E Secondary AC’97 Power Control
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
-
-
-
-
-
-
-
-
SPR7 SPR6 SPR5 SPR4 SPR3 SPR2 SPR1 SPR0
b0................SPR0: Secondary AC’97 Power Down Control 0
This bit controls the power state of the ADC and Input Mux in the Secondary AC’97.
“0”: Normal
(default)
“1”: Power down



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