Manual

220 Series Commercial Grade CF Product Manual v2.0Cactus Technologies
®
17
The CompactFlash Memory Cards are identied by information in the Card Information Structure (CIS).
The entries in Table 3-8 and Table 3-9 show how to access the various registers and address spaces in
the memory cards.
Card Conguration
3.4.
-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)
NOTE: The location of the card conguration 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 conguration register addresses. All other
attribute memory locations are reserved.
Table 3-8. Registers and Memory Space 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
Table 3-9. Conguration Registers Decoding
NOTE: The location of the card conguration 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
conguration register addresses. All other attribute memory locations are reserved.