SanDisk CompactFlash User Manual

CompactFlash Memory Card Product Manual
SanDisk CompactFlash Memory Card Product Manual © 1998 SANDISK CORPORATION38
4.4 Card Configuration
The CompactFlash Memory Cards are 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 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.
Table 4-11 Registers and Memory Space Decoding
-CE2 -CE1 -REG -OE-WE A10 A9 A8-A4 A3 A2 A1 A0 SELECTED SPACE
1 1 X X X X X XX X X X X Standby
X 0 0 0 1 X 1 XX X X X 0 Configuration Registers Read
1 0 1 0 1 X X XX X X X X Common Memory Read (8 Bit D7-D0)
0 1 1 0 1 X X XX X X X X Common Memory Read (8 Bit D15-D8)
0 0 1 0 1 X X XX X X X 0 Common Memory Read (16 Bit D15-D0)
X 0 0 1 0 X 1 XX X X X 0 Configuration Registers Write
1 0 1 1 0 X X XX X X X X Common Memory Write (8 Bit D7-D0)
0 1 1 1 0 X X XX X X X X Common Memory Write (8 Bit D15-D8)
0 0 1 1 0 X X XX X X X 0 Common Memory Write (16 Bit D15-D0)
X 0 0 0 1 0 0 XX X X X 0 Card Information Structure Read
1 0 0 1 0 0 0 XX X X X 0 Invalid Access (CIS Write)
1 0 0 0 1 X X XX X X X 1 Invalid Access (Odd Attribute Read)
1 0 0 1 0 X X XX X X X 1 Invalid Access (Odd Attribute Write)
0 1 0 0 1 X X XX X X X X Invalid Access (Odd Attribute Read)
0 1 0 1 0 X X XX X X X X Invalid Access (Odd Attribute Write)
Configuration Registers Decoding
-CE2 -CE1 -REG -OE -WE A10 A9 A8-A4 A3 A2 A1 A0 SELECTED REGISTER
X 0 0 0 1 0 1 00 0 0 0 0 Configuration Option Reg Read
X 0 0 1 0 0 1 00 0 0 0 0 Configuration Option Reg Write
X 0 0 0 1 0 1 00 0 0 1 0 Card Status Register Read
X 0 0 1 0 0 1 00 0 0 1 0 Card Status Register Write
X 0 0 0 1 0 1 00 0 1 0 0 Pin Replacement Register Read
X 0 0 1 0 0 1 00 0 1 0 0 Pin Replacement Register Write
X 0 0 0 1 0 1 00 0 1 1 0 Socket and Copy Register Read
X 0 0 1 0 0 1 00 0 1 1 0 Socket and Copy Register Write
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 CompactFlash Memory Card attribute
memory except to the card configuration register addresses. All other attribute memory locations are
reserved.

SanDisk CompactFlash Specifications

General

Brand	SanDisk
Model	CompactFlash
Category	Storage
Language	English