SanDisk CompactFlash Extreme III Product Manual page 40

Interface Description
Decoding for the configuration registers is defined in Table 3-18.
Table 3-18
-CE2 -CE1
X 0
X 0
X 0
X 0
X 0
X 0
X 0
X 0
3.4.1 Attribute Memory Function
Attribute Memory is a space where a CompactFlash Memory Card identification and
configuration information is stored, and is limited to 8-bit wide accesses only at even
addresses. The card configuration registers are also located there.
For the Attribute Memory Read function, signals -REG and -OE must be active and -WE
inactive during the cycle. As in the Main Memory Read functions, the signals -CE1 and -CE2
control the even-byte and odd-byte address, but only the even-byte data is valid during the
Attribute Memory access. Refer to Table 3-19 for signal states and bus validity for the
Attribute Memory function.
: The -CE signal or both the -OE and -WE signal must be de-asserted
NOTE
between consecutive cycle operaitons.
Table 3-19
Function Mode
Standby
Read Byte Access CIS ROM
(8 bits)
Write Byte Access CIS (8 bits)
(Invalid)
Read Byte Access
Configuration (8 bits)
Write Byte Access
Configuration (8 bits)
Read Word Access CIS
(16 bits)
Write Word Access CIS
(16 bits) (Invalid)
Read Word Access
Configuration (16 bits)
Write Word Access
Configuration (16 bits)
02/07, Rev. 12.0
Configuration Registers Decoding
-REG -OE -WE A10 A9
0 0 1 0 1
0 1 0 0 1
0 0 1 0 1
0 1 0 0 1
0 0 1 0 1
0 1 0 0 1
0 0 1 0 1
0 1 0 0 1
Attribute Memory Function
-REG -CE2 -CE1
X H
L H
L H
L H
L H
L L
L L
L L
L L
3-22
SanDisk CompactFlash Card OEM Product Manual
A8-
A4 A3 A2 A1 A0
00 0 0 0 0
00 0 0 0 0
00 0 0 1 0
00 0 0 1 0
00 0 1 0 0
00 0 1 0 0
00 0 1 1 0
00 0 1 1 0
A9 A0 -OE -WE
H X X X X
L L L L H
L L L H L
L H L L H
L H L H L
L L X L H
L L X H L
L H X L H
L H X H L
© 2007 SanDisk Corporation
Selected Register
Configuration Option Read
Configuration Option Write
Card Status Read
Card Status Write
Pin Replacement Read
Pin Replacement Write
Socket and Copy Read
Socket and Copy Write
D15-D8 D7-D0
High Z High Z
High Z Even
Byte
Don't Even
Care Byte
High Z Even
Byte
Don't Even
Care Byte
Not Valid Even
Byte
Don't Even
Care Byte
Not Valid Even
Byte
Don't Even
Care Byte