Datasheet

T
T
T
S
S
S
4
4
4
G
G
G
~
~
~
3
3
3
2
2
2
G
G
G
C
C
C
F
F
F
1
1
1
5
5
5
0
0
0
150X CompactFlash Card
Transcend Information Inc.
V1.0
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