YMF754 Datasheet, PDF (27/60 Pages) YAMAHA CORPORATION – DS-1E

YMF754
50h: Capability ID
Read Only
Default: 01h
Access Bus Width: 8, 16, 32-bit
b7 b6 b5 b4 b3 b2 b1 b0
Capability ID
b[7:0] ..........Capability ID: Capability Identifier
This register indicates that the new capability register is for Power Management control. This register is
hardwired to 01h.
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-1E 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
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- D2S -
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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-1E support “D2” of the power state. It is hardwired to “1”.
June 28, 1999
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