SDP3B FlashDisk Product Manual
SanDisk SDP3B FlashDisk Product Manual © 1998 SANDISK CORPORATION
38
4.4
Card Configuration
The SDP3B FlashDisks 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
SDP3B FlashDisk 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
- C E 2 - C E 1 - R E G - O E - W E
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
- C E 2 - C E 1 - R E G - O E - W E 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 SDP3B FlashDisk attribute memory
except to the card configuration register addresses. All other attribute memory locations are reserved.
