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M
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C
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4. Card Configuration
The CompactFlash Storage Cards is identified by appropriate information in the Card Information Structure (CIS).
The following configuration registers are used to coordinate the I/O spaces and the Interrupt level of cards that are
located in the system. In addition, these registers provide a method for accessing status information about the
CompactFlash Storage Card that may be used to arbitrate between multiple interrupt sources on the same
interrupt level or to replace status information that appears on dedicated pins in memory cards that have alternate
use in I/O cards.
4.1 Multiple Function CompactFlash Storage Cards
Table: CompactFlash Storage Card Registers and Memory Space Decoding
-CE2
-CE1
-REG
1
1
X
X
0
0
1
0
1
0
1
1
0
0
1
X
0
0
1
0
1
0
1
1
0
0
1
X
0
0
1
0
0
1
0
0
1
0
0
0
1
0
0
1
0
Table: CompactFlash Storage Card Configuration Registers Decoding
-CE2
-CE1
-REG
X
0
X
0
X
0
X
0
X
0
X
0
X
0
X
0
Note: For CompactFlash Storage Cards, the location of the card configuration registers should always be read from the
CIS since these locations may vary in future products.
Transcend Information Inc.
8
0
8
0
8
0
-OE
-WE
A10
A9
X
X
X
X
0
1
0
1
0
1
X
X
0
1
X
X
0
1
X
X
1
0
0
1
1
0
X
X
1
0
X
X
1
0
X
X
0
1
0
0
1
0
0
0
0
1
X
X
1
0
X
X
0
1
X
X
1
0
X
X
-OE
-WE
A10
0
0
1
0
0
1
0
0
0
0
1
0
0
1
0
0
0
0
1
0
0
1
0
0
0
0
1
0
0
1
0
0
A8-A4
A3
A2
A1
XX
X
X
X
XX
X
X
X
XX
X
X
X
XX
X
X
X
XX
X
X
X
XX
X
X
X
XX
X
X
X
XX
X
X
X
XX
X
X
X
XX
X
X
X
XX
X
X
X
XX
X
X
X
XX
X
X
X
XX
X
X
X
XX
X
X
X
A9
A8-A4
A3
A2
1
00
0
0
1
00
0
0
1
00
0
0
1
00
0
0
1
00
0
1
1
00
0
1
1
00
0
1
1
00
0
1
28
80X CompactFlash Card
A0
SELECTED SPACE
X
Standby and UDMA transfer
0
Configuration Registers Read
X
Common Memory Read (8 Bit D7-D0)
X
Common Memory Read (8 Bit D15-D8)
0
Common Memory Read (16 Bit D15-D0)
0
Configuration Registers Write
X
Common Memory Write (8 Bit D7-D0)
X
Common Memory Write (8 Bit D15-D8)
0
Common Memory Write (16 Bit D15-D0)
0
Card Information Structure Read
0
Invalid Access (CIS Write)
1
Invalid Access (Odd Attribute Read)
1
Invalid Access (Odd Attribute Write)
X
Invalid Access (Odd Attribute Read)
X
Invalid Access (Odd Attribute Write)
A1
A0
SELECTED REGISTER
0
0
Configuration Option Reg Read
0
0
Configuration Option Reg Write
1
0
Card Status Register Read
1
0
Card Status Register Write
0
0
Pin Replacement Register Read
0
0
Pin Replacement Register Write
1
0
Socket and Copy Register Read
1
0
Socket and Copy Register Write
V 1 . 1
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