參數(shù)資料
型號: SDCFBI-30-101
廠商: SANDISK CORP
元件分類: 存儲控制器/管理單元
英文描述: FLASH MEMORY DRIVE CONTROLLER, XMA50
封裝: PC CARD-50
文件頁數(shù): 61/124頁
文件大?。?/td> 769K
代理商: SDCFBI-30-101
CompactFlash Memory Card Product Manual
SanDisk CompactFlash Memory Card Product Manual 1999 SANDISK CORPORATION
41
4.4.1
Attribute Memory Function
Attribute memory is a space where CompactFlash
Memory Card identification and configuration
information is stored, and is limited to 8-bit wide
accesses only at
even addresses.
The
card
configuration registers are also located here.
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 t h e
even-byte and odd-byte address, but only t h e
even-byte data is valid during the Attribute
Memory access. Refer to Table 4-12 below for
signal states and bus validity for the Attribute
Memory function.
Table 4-12 Attribute Memory Function
Function Mode
-REG
-CE2
-CE1
A 9
A 0
- O E
- W E
D15-D8
D7-D0
Standby Mode
X
H
XXXX
High Z
Read Byte Access
CIS ROM (8 bits)
LH
LLLLH
High Z
Even Byte
Write Byte Access
CIS (8 bits) (Invalid)
LH
LLLH
L
Don't Care
Even Byte
Read Byte Access
Configuration (8 bits)
L
H
L
H
L
H
High Z
Even Byte
Write Byte Access
Configuration (8 bits)
L
H
L
H
L
H
L
Don't Care
Even Byte
Read Word Access
CIS (16 bits)
LLLLX
LH
Not Valid
Even Byte
Write Word Access
CIS (16 bits) (Invalid)
LLLLX
H
L
Don't Care
Even Byte
Read Word Access
Configuration (16 bits)
LLLH
X
L
H
Not Valid
Even Byte
Write Word Access
Configuration (16 bits)
LLLH
X
H
L
Don't Care
Even Byte
Note:
The -CE signal or both the -OE signal and the -WE signal must be de-asserted between consecutive cycle
operations.
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