YMF724F
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-1 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
D1S
Version
b[2:0] ..........Version
These bits contain the revision number of the Power Management Interface Specification. They are
hardwired to 001b.
b9................D1S: D1 Support
This bit indicates whether DS-1 support “D1” of the power state. Only when EEPROM connects
externally, this bit can be set to “1”, and D1 state can support. When EEPROM does not connect
externally, use ACPI mode (58-59h: ACPI Mode Register, ACPI bit) to support D1 state.
The default value is “0”.
b10..............D2S: D2 Support
This bit indicates that DS-1 support “D2” of the power state. It is hardwired to “1”.
January 14, 1999
-25-
YAMAHA [ YAMAHA CORPORATION ]
