ATA20 White Electronic Designs Corporation, ATA20 Datasheet - Page 12
![no-image](/images/no-image-200.jpg)
ATA20
Manufacturer Part Number
ATA20
Description
Density = 8MB-160MB ;; Memory Device = Hitachi Flash ;; Organization = X16/x8 ;; Speed (ns) = 250 ;; Volt = 3/5 ;;
Manufacturer
White Electronic Designs Corporation
Datasheet
1.ATA20.pdf
(66 pages)
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June 2000 Rev. 5 – ECO #12935
3. True IDE Mode
The card can be configured in a True IDE Mode of operation. This card is configured in this mode only when the -OE
input signal is asserted low by the host during the power off to power on cycle. In this True IDE Mode the PCMCIA
protocol and configuration are disabled and only I/O operations to the Task File and Data Register are allowed. In this
mode no Memory or Attribute Registers are accessible to the host. The card permits 8 bit access if the user issues a
Set Feature Command to put the device in the 8 bit Mode.
True IDE Mode Read I/O Function
Mode
Invalid mode
Standby mode
Data register access
All status access
Other task file access
Note:
True IDE Mode Write I/O Function
Mode
Invalid mode
Standby mode
Data register access
Control register access
Other task file access
Note:
True IDE Mode I/O Access Timing Example
7PxxxATA20xxC25
D0 to D15
A0 to A2
: L or H
: L or H
-IOIS16
-IOWR
-IORD
-CE
read cycle
-CE2
L
H
H
L
H
-CE2
L
H
H
L
H
Dout
-CE1
L
H
L
H
L
-CE1
L
H
L
H
L
A0 to A2 -IORD
0
6H
1-7H
A0 to A2 -IORD
0
6H
1-7H
12
White Electronic Designs Corporation (508) 366-5151
L
L
L
H
H
H
write cycle
H
H
H
L
-IOWR
-IOWR
L
L
D8 to D15 D0 to D7
High-Z
High-Z
odd byte
High-Z
High-Z
D8 to D15 D0 to D7
don’t care
don’t care
odd byte
don’t care
don’t care
Din
High-Z
High-Z
even byte
status out
data
don’t care
don’t care
even byte
control in
data
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