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CompactFlash Memory Card Product Manual
4.6
Common Memory Transfer Function
4.6.1
Common Memory Function
The Common Memory transfer to or from the
CompactFlash Memory Card can be either 8 or 16
bits.
The CompactFlash Memory Card permits both 8
and 16 bit accesses to all of its Common Memory
addresses.
Table 4-16 Common Memory Function
Function Code
Standby Mode
Byte ReadAccess
(8 bits)
Byte Write Access
(8 bits)
Word Read Access
(16 bits)
Word Write Access
(16 bits)
Odd Byte Read Only
(8 bits)
Odd Byte Write Only
(8 bits)
44
-REG
-CE2
-CE1
X
H
H
H
H
L
H
H
L
H
H
L
H
H
L
H
L
L
H
L
L
H
L
H
H
L
H
SanDisk CompactFlash Memory Card Product Manual © 1998 SANDISK CORPORATION
The CompactFlash Memory Card may request the
host to extend the length of a memory write cycle
or extend the length of a memory read cycle until
data is ready by asserting the -WAIT signal at
the start of the cycle.
A0
- O E
-WE
X
X
X
L
L
H
H
L
H
L
H
L
H
H
L
X
L
H
X
H
L
X
L
H
X
H
L
D15-D8
D7-D0
High Z
High Z
High Z
Even-Byte
High Z
Odd-Byte
Don't Care
Even-Byte
Don't Care
Odd-Byte
Odd-Byte
Even-Byte
Odd-Byte
Even-Byte
Odd-Byte
High Z
Odd-Byte
Don't Care
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