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7 Card Configuration
The CompactFlash Memory Card is identified by information in the Card Information Structure (CIS). The Card has
four configuration registers (Table 32and Table 33).
Configuration Option Register
Pin Replacement Register
Card Configuration and Status Register
Socket and Copy Register
They are used to coordinate the I/O spaces and the Interrupt level of cards that are located in the system. In
addition, in I/O Card mode these registers provide a method for accessing status information that would normally
appear on dedicated pins in Memory Card mode.
The base address of the card configuration registers is 200h in the Attribute Memory space.
No write operation should be performed to the attribute memory area except for the configuration register
Table 32: CompactFlash Memory Card Registers and Memory Space Decoding
-CE2
1
X
1
0
0
X
1
0
0
X
1
1
1
0
0
-CE1
1
0
0
1
0
0
0
1
0
0
0
0
0
1
1
-REG
X
0
1
1
1
0
1
1
1
0
0
0
0
0
0
-OE
X
0
0
0
0
1
1
1
1
0
1
0
1
0
1
-WE
X
1
1
1
1
0
0
0
0
1
0
1
0
1
0
A10
X
X
X
X
X
X
X
X
X
0
0
X
X
X
X
A9
X
1
X
X
X
1
X
X
X
0
0
X
X
X
X
A8-A4
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
A3
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
A2
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
A1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
A0
X
0
X
X
0
0
X
X
0
0
0
1
1
X
X
Selected Space
Standby
Configuration Register Read
Common Memory Read (8 bit – D7 to D0)
Common Memory Read (8 bit – D15 to D8)
Common Memory Read (16 bit – D15 to D0)
Configuration Register Write
Common Memory Write (8 bit – D7 to D0)
Common Memory Write (8 bit – D15 to D8)
Common Memory Write (16 bit – D15 to D0)
Card Information Structure Read
Invalid Access (CIS Write)
Invalid Access (CIS Odd Byte Read)
Invalid Access (CIS Odd Byte Write)
Invalid Access (CIS Odd Byte Read)
Invalid Access (CIS Odd Byte Write)
Table 33: CompactFlash Memory Card Configuration Registers Decoding
-CE2
X
X
X
X
X
X
X
X
-CE1
0
0
0
0
0
0
0
0
-REG
0
0
0
0
0
0
0
0
-OE
0
1
0
1
0
1
0
1
-WE
1
0
1
0
1
0
1
0
A10
0
0
0
0
0
0
0
0
A9
1
1
1
1
1
1
1
1
A8~A4
00
00
00
00
00
00
00
00
A3
0
0
0
0
0
0
0
0
A2
0
0
0
0
1
1
1
1
A1
0
0
1
1
0
0
1
1
A0
0
0
0
0
0
0
0
0
Selected Space
Configuration Option Register Read(200h)
Configuration Option Register Write(200h)
Card Status Register Read (202h)
Card Status Register Write (202h)
Pin Replacement Register Read (204h)
Pin Replacement Register Write (204h)
Socket and Copy Register Read (206h)
Socket and Copy Register Write (206h)
Note: The location of the Card Configuration Registers should always be read from the CIS since these locations
may vary in future products. No Writes should be performed to the Card Attribute Memory except to the Card
Configuration Register Addresses. All other attribute memory locations are reserved.
7.1 Configuration Option Register (200h in Attribute Memory)
The Config uration Option Register is used to configure the Card’s interface, address decoding and interrupt to the
Card (see Table 34).
7.1.1 SRESET
Setting the SRESET bit to ‘1’ and returning the bit ‘0’ places the CompactFlash S torage
Card in the Reset state. Setting this bit to ‘1’ is equivalent to asserting the RESET signal
except that the SRESET bit is not cleared. Returning the SRESET bit to ‘0’ leaves the
CompactFlash Storage Card in the same un-configured Reset state as after a power-up and
hardware reset.
This bit is set to ‘0’ at power -up and taking the Card through a hardware reset.
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 1.20
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
C-320_data_sheet_CF-HxBO_Rev120.doc
Page 43 of 101
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