T
T
T
S
S
S
3
3
3
2
2
2
M
M
M
~
~
~
1
1
1
G
G
G
C
C
C
F
F
F
8
8
8
0
0
0
80X CompactFlash Card
Transcend Information Inc.
V1.1
29
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
DMA CMD
-REG
-CE2
-CE1
A10
A9
A0
-OE
-WE
D15-D8
D7-D0
Standby Mode
Don’t Care
H
H
H
X
X
X
X
X
High Z
High Z
Standby Mode
No
X
H
H
X
X
X
X
X
High Z
High Z
UDMA Operation (see section
4.3.18: Ultra DMA Mode
Read/Write
Timing
Specification)
Yes
L
1
H
H
X
X
X
H
H
Odd Byte
Even
Byte
Read Byte Access CIS ROM
(8 bits)
No
L
H
L
2
L
L
L
L
2
H
High Z
Even
Byte
Write Byte Access CIS (8 bits)
(Invalid)
No
L
H
L
2
L
L
L
H
L
2
Don’t
Care
Even
Byte
Read
Byte
Access
Configuration CompactFlash
Storage (8 bits)
No
L
H
L
L
H
L
L
H
High Z
Even
Byte
Write
Byte
Access
Configuration CompactFlash
Storage (8 bits)
No
L
H
L
L
H
L
H
L
Don’t
Care
Even
Byte
Read Word Access CIS (16
bits)
No
L
L
2
L
2
L
L
X
L
2
H
Not Valid
Even
Byte
Write Word Access CIS (16
bits) (Invalid)
No
L
L
2
L
2
L
L
X
H
L
2
Don’t
Care
Even
Byte
Read
Word
Access
Configuration CompactFlash
Storage (16 bits)
No
L
L
2
L
2
L
H
X
L
2
H
Not Valid
Even
Byte
Write
Word
Access
Configuration CompactFlash
Storage (16 bits)
No
L
L
2
L
2
L
H
X
H
L
2
Don’t
Care
Even
Byte
Note: The -CE signal or both the -OE signal and the -WE signal shall be de-asserted between consecutive cycle
operations.
Table: Attribute Memory Function
