YMF754-V ETC, YMF754-V Datasheet - Page 28
YMF754-V
Manufacturer Part Number
YMF754-V
Description
DS-1E
Manufacturer
ETC
Datasheet
1.YMF754-V.pdf
(60 pages)
- Current page: 28 of 60
- Download datasheet (306Kb)
YMF754
54-55h: Power Management Control / Status
58-59h: ACPI Mode
5A-5Bh: DS-1E Secondary AC’97 Power Control
b[1:0] ..........PS: Power State
b0................ACPI: ACPI Mode Select
b0................SPR0: Secondary AC’97 Power Down Control 0
These bits determine the power state of DS-1E. DS-1E supports the following power states:
When the power state is changed from D3
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.
This bit select either PCI Bus Power Management or ACPI Mode for power management of DS-1E.
This bit controls the power state of the ADC and Input Mux in the Secondary AC’97.
b15
b15
b15
“0”:
“1”:
“2”:
“3”:
“0”: PCI Bus Power Management is used. CAP bit (06-07h: Status Register) and Capabilities Pointer
“1”: ACPI Mode is used. CAP bit and Capabilities Pointer are hardwired “0”, and disabled.
“0”: Normal
“1”: Power down
-
-
-
Read / Write
Default: 0000h
Access Bus Width: 8, 16, 32-bit
Read / Write
Default: 0000h
Access Bus Width: 8, 16, 32-bit
Read / Write
Default: 0000h
Access Bus Width: 8, 16, 32-bit
(34h) are enabled.
b14
b14
b14
-
-
-
b13
D0
D1
D2
D3
b13
b13
-
-
-
hot
b12
b12
b12
-
-
-
(not supported)
(default)
(default)
b11
b11
b11
-
-
-
b10
b10
b10
-
-
-
hot
b9
b9
b9
-
-
-
to D0, DS-1E resets the PCI Configuration register 00-3Fh.
-28-
b8
b8
b8
-
-
-
SPR7 SPR6 SPR5 SPR4 SPR3 SPR2 SPR1 SPR0
b7
b7
b7
-
-
b6
b6
b6
-
-
b5
b5
b5
-
-
b4
b4
b4
-
-
b3
b3
b3
-
-
June 28, 1999
b2
b2
b2
-
-
b1
b1
b1
-
PS
ACPI
b0
b0
b0
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