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SMC032AF bảng dữ liệu(PDF) 35 Page - Numonyx B.V

tên linh kiện SMC032AF
Giải thích chi tiết về linh kiện  32 Mbyte, 64 Mbyte, 128 Mbyte, 256 Mbyte and 512 Mbyte 3.3 V / 5 V supply CompactFlash??card
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SMC032AF bảng dữ liệu(HTML) 35 Page - Numonyx B.V

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SMCxxxAF
Card configuration
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6.5
Attribute memory function
Attribute memory is a space where identification and configuration information are stored,
and is limited to 8 bit wide accesses at even addresses. The Card Configuration registers
are also located here, the base address of the configuration registers is 200h.
For the attribute memory Read function, signals –REG and –OE must be active and –WE
inactive during the cycle. As in the main memory read functions, the signals –CE1 and –CE2
control the even and odd byte address, but only the even byte data is valid during the
attribute memory access. Refer to Table 31 for signal states and bus validity.
Table 31.
Attribute memory function(1)
Function mode
–REG
–CE2
–CE1
A10
A9
A0
–OE
–WE
D15 to D8
D7 to D0
Standby
X
H
H
X
X
X
X
X
High-Z
High-Z
Read Byte Access CIS
(8 bits)
L
H
L
L
L
L
L
H
High-Z
Even byte
Write Byte Access CIS
(8 bits) Invalid
L
H
L
L
L
L
H
L
Don’t care
Even byte
Read Byte Access
Configuration
(8 bits)
L
H
L
L
H
L
L
H
High-Z
Even byte
Write Byte Access
Configuration
(8 bits)
L
H
L
L
H
L
H
L
Don’t care
Even byte
Read Byte Access
Configuration CF+ (8
bits)
L
H
L
X
X
L
L
H
High-Z
Even byte
Read Word Access CIS
(16 bits)
LL
LL
L
X
L
H
Not valid
Even byte
Write Word Access CIS
(16 bits) Invalid
L
L
L
L
L
X
H
L
Don’t care
Even byte
Read Word Access
Configuration (16 bits)
LL
LL
H
X
L
H
Not valid
Even byte
Write Word Access
Configuration (16 bits)
L
L
L
L
H
X
H
L
Don’t care
Even byte
1.
The –CE signal or both the –OE signal and the –WE signal must be de-asserted between consecutive cycle operations.



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