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THNCFXXXBAI Datasheet(PDF) 27 Page - Toshiba Semiconductor

Part No. THNCFXXXBAI
Description  The THNCFxxxMBA/BAI series CompactFlash card is a flash technology based with ATA interface flash memory card.
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Maker  TOSHIBA [Toshiba Semiconductor]
Homepage  http://www.semicon.toshiba.co.jp/eng
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THNCFXXXBAI Datasheet(HTML) 27 Page - Toshiba Semiconductor

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THNCFxxxMBA/BAI Series
2002-10-20
27/48
Preliminary
12. Device control register
This register is write only register, and it is used for controlling the card interrupt request and issuing an
ATA soft reset to the card.
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
X
X
X
X
1
SRST
nIEN
0
bit
Name
Function
7 to 4
X
Don’t care
3
1
This bit is set to “1”.
2
SRST(Software ReSeT)
This bit is set to “1” in order to force the card to perform Task File Reset operation.
This does not change the Card Configuration registers as a Hardware Reset does.
The card remains in Reset until this bit is reset to “0”.
1
nIEN(Interrupt Enable)
This bit is used for enabling
−IREQ. When this bit is set to “0”, −IREQ is enabled.
When this bit is set to “1”,
−IREQ is disabled.
0
0
This bit is set to “0”.
13. Drive Address register
This register is read only register, and it is used for confirming the drive status. This register is provides for
compatibility with the AT disk drive interface. It is recommended that this register is not mapped into the
host’s I/O space because of potential conflicts on bit7.
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
X
nWTG
nHS3
nHS2
nHS1
nHS0
nDS1
nDS0
bit
Name
Function
7
X
This bit remains tri-state when host read access.
6
nWTG (WriTing Gate)
This bit is set as 0
5 to 2
nHS3 to nHS0 (Head Select3-0)
These bits are the negative value of Head Select bits (bit3 to 0) in Drive/Head
register.
1
nDS1 (Idrive Select1)
This bit is 0 when drive 1 is active and selected.
0
nDS0 (Idrive Select0)
This bit is 0 when drive 0 is active and selected.


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