參數(shù)資料
型號(hào): 7P640ATA2503C25
英文描述: Flash Memory Card(640M位閃速存儲(chǔ)器卡)
中文描述: 閃存卡(640M的位閃速存儲(chǔ)器卡)
文件頁(yè)數(shù): 8/62頁(yè)
文件大?。?/td> 626K
代理商: 7P640ATA2503C25
7PxxxATA25xxC25
June 2000 Rev. 1 – ECO #12936
8
White Electronic Designs Corporation
(508) 366-5151
Host access specifications
1. Attribute Access Specifications
When the CIS-ROM region or the Configuration register region is accessed, read and write operations are
executed under the condition of -REG = "L" as follows. That region can be accessed by Byte/Word/Odd-
byte modes which are defined by the PC card standard specifications.
Attribute Read Access Mode
Mode
-REG
-CE2
-CE1
A0
-OE
-WE
D8 to D15
D0 to D7
Standby mode
×
H
H
×
×
×
High-Z
High-Z
Byte access (8-bit)
L
H
L
L
L
H
High-Z
even byte
L
H
L
H
L
H
High-Z
invalid
Word access (16-bit)
L
L
L
×
×
L
H
invalid
even byte
Odd byte access (8-bit)
Note:
×
: L or H
L
L
H
L
H
invalid
High-Z
Attribute Write Access Mode
Mode
-REG
-CE2
-CE1
A0
-OE
-WE
D8 to D15
D0 to D7
Standby mode
×
H
H
×
×
×
Don’t care
Don’t care
Byte access (8-bit)
L
H
L
L
H
L
Don’t care
even byte
L
H
L
H
H
L
Don’t care
Don’t care
Word access (16-bit)
L
L
L
×
×
H
L
Don’t care
even byte
Odd byte access (8-bit)
Note:
×
: L or H
L
L
H
H
L
Don’t care
Don’t care
Attribute Access Timing Example
A0 to A10
-REG
-CE2/-CE1
-OE
-WE
D0 to D15
Dout
read cycle
Din
write cycle
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