Transcend Information CompactFlash CF 300X User Manual
Page 44
T
T
T
S
S
S
2
2
2
G
G
G
~
~
~
1
1
1
6
6
6
G
G
G
C
C
C
F
F
F
3
3
3
0
0
0
0
0
0
300X CompactFlash Card
Transcend Information Inc.
V1.1
44
Common Memory Transfer Function
The Common Memory transfer to or from the CompactFlash Storage can be either 8 or 16 bits.
Function Code
DMA
-REG -CE2 -CE1 A0
-OE
-WE
D15-D8
D7-D0
Standby Mode
None
X
H
H
X
X
X
High Z
High Z
Byte Read (8 bits)
Don’t
Care
H
H
H
H
L
L
L
H
L
L
H
H
High Z
High Z
Even-Byte
Odd-Byte
Byte Write (8 bits)
Don’t
Care
H
H
H
H
L
L
L
H
H
H
L
L
Don’t Care
Don’t Care
Even-Byte
Odd-Byte
Word Read (16 bits)
Don’t
Care
H
L
L
X
L
H
Odd-Byte
Even-Byte
Word Write (16 bits)
Don’t
Care
H
L
L
X
H
L
Odd-Byte
Even-Byte
Odd Byte Read Only (8 bits)
Don’t
Care
H
L
H
X
L
H
Odd-Byte
High Z
Odd Byte Write Only (8 bits)
Don’t
Care
H
L
H
X
H
L
Odd-Byte
Don’t Care
Ultra DMA Write
Write
L
H
H
X
H
H
Odd-Byte
Even-Byte
Ultra DMA Read
Read
L
H
H
X
H
H
Odd-Byte
Even-Byte
Table: Common Memory Function