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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 31and Table 32).

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

addresses. All other attribute memory locations are reserved. See 7.5 Attribute Memory Function.

Table 31: 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 32: 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 Configuration Option Register is used to configure the Card’s interface, address decoding and interrupt to the

Card (see Table 33).

7.1.1 SRESET

Setting the SRESET bit to ‘1’ and returning the bit ‘0’ places the CompactFlash Storage

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.

Swissbit AG

Industriestrasse 4

Swissbit reserves the right to change products or specifications without notice.

Revision: 1.51

CH-9552 Bronschhofen

Switzerland

www.swissbit.com

industrial@swissbit.com

C-300_data_sheet_CF-HxBK_Rev151.doc

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