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CS5535 데이터시트(PDF) 321 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 CS5535
상세설명  Geode??CS5535 I/O Companion Multi-Function South Bridge
PDF  555 Pages
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제조업체  NSC [National Semiconductor (TI)]
홈페이지  http://www.national.com
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CS5535 데이터시트(HTML) 321 Page - National Semiconductor (TI)

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Floppy Port Register Descriptions (Continued)
5.7.1
Floppy Port Specific MSRs
5.7.1.1
Floppy Port 3F2h Shadow (FLPY_3F2_SHDW)
5.7.1.2
Floppy Port 3F7h Shadow (FLPY_3F7_SHDW)
MSR Address
51400030h
Type
RO
Reset Value
xxh
FLPY_3F2_SHDW Register Map
76543
210
FLPY_PORT_3F2_VAL
FLPY_3F2_SHDW Bit Descriptions
Bit
Name
Description
7:0
FLPY_PORT_3F2
_VAL
Floppy Port Shadow Register Value Last Written to I/O Port 3F2h. Required for
support of FDC power ON/OFF and Zero Volt Suspend/Resume coherency.
This register is a copy of an I/O register that cannot safely be directly read. Value in reg-
ister is not deterministic of when the register is being read. It is provided here to assist
in a Save-to-Disk operation.
MSR Address
51400031h
Type
RO
Reset Value
xxh
FLPY_3F7_SHDW Register Map
76543
210
FLPY_PORT_3F7_VAL
FLPY_3F7_SHDW Bit Descriptions
Bit
Name
Description
7:0
FLPY_PORT_3F7
_VAL
Floppy Port Shadow Register Value Last Written to I/O Port 3F7h. Required for
support of FDC power ON/OFF and Zero Volt Suspend/Resume coherency.
This register is a copy of an I/O register that cannot safely be directly read. Value in reg-
ister is not deterministic of when the register is being read. It is provided here to assist
in a Save-to-Disk operation.



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