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PC87373 데이터시트(PDF) 51 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 PC87373
상세설명  LPC SuperI/O with Glue Functions
PDF  174 Pages
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제조업체  NSC [National Semiconductor (TI)]
홈페이지  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87373 데이터시트(HTML) 51 Page - National Semiconductor (TI)

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3.0 Device Architecture and Configuration (Continued)
51
www.national.com
Revision 1.1
3.8.4
Drive ID Register
This register is reset to 00h. This register controls bits 5 and 4 of the TDR register in Enhanced mode.
Power Well: VDD3
Location:
Index F1h
Type:
R/W
Usage Hints: Some BIOS implementations support FDDs with automatic media sense; in this case, bit 5 of TDR register in
Enhanced mode is interpreted as valid media sense when it is cleared to 0. If drive 0 and/or drive 1 do not support automatic
media sense, bits 1 and/or 3 of the Drive ID register must be set to 1 (to indicate non-valid media sense). When Drive 0 or
Drive 1 is selected, the Drive ID bit is reflected on bit 5 of TDR register in Enhanced mode.
Bit
76543210
Name
Reserved
Drive 1 ID
Drive 0 ID
Reset
00000000
Bit
Description
7-4
Reserved.
3-2
Drive 1 ID. When drive 1 is accessed, these bits are reflected on bits 5-4 of the TDR register, respectively.
1-0
Drive 0 ID. When drive 0 is accessed, these bits are reflected on bits 5-4 of the TDR register, respectively.



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