參數(shù)資料
型號: HB2881000A6
廠商: Hitachi,Ltd.
英文描述: FLASH ATA Card
中文描述: 阿拉木圖閃存卡
文件頁數(shù): 15/66頁
文件大?。?/td> 168K
代理商: HB2881000A6
HB2881000A5
15
3. True IDE Mode
The card can be configured in a True IDE
m
ode of operation. This card is configured in this mode only when the -OE
input signal is asserted GND by the host. In this True IDE mode Attribute Registers are not accessible from the host.
Only I/O operation to the task file and data register are allowed. If this card is configured during power on
sequence, data register are accessed in word (16-bit).
The card permits 8-bit accesses if the user issues a Set
Feature Command to put the device in 8-bit mode.
True IDE Mode Read I/O Function
Mode
-CE2
-CE1
A0 to A2
-IORD
-IOWR
D8 to D15
D0 to D7
Invalid mode
L
L
×
×
×
×
×
×
High-Z
High-Z
Standby mode
H
H
High-Z
High-Z
Data register access
H
L
0
L
H
odd byte
even byte
Alternate status access
L
H
6H
L
H
High-Z
status out
Other task file access
Note:
×
: L or H
H
L
1-7H
L
H
High-Z
data
True IDE Mode Write I/O Function
Mode
-CE2
-CE1
A0 to A2
-IORD
-IOWR
D8 to D15
D0 to D7
Invalid mode
L
L
×
×
×
×
×
×
don’t care
don’t care
Standby mode
H
H
don’t care
don’t care
Data register access
H
L
0
H
L
odd byte
even byte
Control register access
L
H
6H
H
L
don’t care
control in
Other task file access
Note:
×
: L or H
H
L
1-7H
H
L
don’t care
data
True IDE Mode I/O Access Timing Example
Dout
Din
A0 to A2
-CE
-IORD
-IOWR
-IOIS16
D0 to D15
read cycle
write cycle
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