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T
S
3
2
M
~
1
G
C
F
T
S
3
2
M
~
1
G
C
F
T
S
3
2
M
~
1
G
C
F
4.2 Attribute Memory Function
Attribute memory is a space where CompactFlash Storage Card identification and configuration information are
stored, and is limited to 8 bit wide accesses only at even addresses. The card configuration registers are also
located here. For CompactFlash Storage Cards, the base address of the Card configuration registers is 200h.
Function Mode
Standby Mode
Standby Mode
UDMA Operation (see section
4.3.18:
Ultra
DMA
Read/Write
Specification)
Read Byte Access CIS ROM
(8 bits)
Write Byte Access CIS (8 bits)
(Invalid)
Read
Byte
Access
Configuration CompactFlash
Storage (8 bits)
Write
Byte
Access
Configuration CompactFlash
Storage (8 bits)
Read Word Access CIS (16
bits)
Write Word Access CIS (16
bits) (Invalid)
Read
Word
Access
Configuration CompactFlash
Storage (16 bits)
Write
Word
Access
Configuration CompactFlash
Storage (16 bits)
Note: The -CE signal or both the -OE signal and the -WE signal shall be de-asserted between consecutive cycle
operations.
Transcend Information Inc.
8
0
8
0
8
0
Table: Attribute Memory Function
DMA CMD
-REG
Don't Care
No
Mode
Yes
Timing
No
No
No
No
No
No
No
No
-CE2
-CE1
A10
H
H
H
X
X
H
H
X
L
H
H
X
1
L
H
L
L
2
L
H
L
L
2
L
H
L
L
L
H
L
L
L
L
L
L
2
2
L
L
L
L
2
2
L
L
L
L
2
2
L
L
L
L
2
2
29
80X CompactFlash Card
A9
A0
-OE
-WE
X
X
X
X
X
X
X
X
X
X
H
H
L
L
L
H
2
L
L
H
L
2
H
L
L
H
H
L
H
L
L
X
L
H
2
L
X
H
L
2
H
X
L
H
2
H
X
H
L
2
D15-D8
D7-D0
High Z
High Z
High Z
High Z
Even
Odd Byte
Byte
Even
High Z
Byte
Don't
Even
Care
Byte
Even
High Z
Byte
Don't
Even
Care
Byte
Even
Not Valid
Byte
Don't
Even
Care
Byte
Even
Not Valid
Byte
Don't
Even
Care
Byte
V 1 . 1
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