ATA20 White Electronic Designs Corporation, ATA20 Datasheet - Page 11

• 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

June 2000 Rev. 5 – ECO #12935
(2) Memory address map
Task File Register Read Access Mode (2)
Mode
Standby mode
Byte access (8-bit)
Word access (16-bit)
Odd byte access (8-bit) H
Note:
Task File Register Write Access Mode (2)
Mode
Standby mode
Byte access (8-bit)
Word access (16-bit)
Odd byte access (8-bit) H
Note:
Task File Register Access Timing Example (2)
7PxxxATA20xxC25
: L or H
: L or H
-CE2/-CE1
D0 to D15
A0 to A10
-REG
-WE
-OE
-REG -CE2
H
H
H
-REG -CE2
H
H
H
read cycle
H
H
H
L
L
H
H
H
L
L
-CE1
H
L
L
L
H
-CE1
H
L
L
L
H
Dout
A0
L
H
A0
L
H
11
-OE
L
L
L
L
-OE
H
H
H
H
White Electronic Designs Corporation [phone]
-WE
H
H
H
H
-WE
L
L
L
L
-IORD -IOWR D8 to D15 D0 to D7
H
H
H
H
-IORD -IOWR D8 to D15 D0 to D7
H
H
H
H
write cycle
H
H
H
H
H
H
H
H
High-Z
High-Z
High-Z
odd byte
odd byte
Don’t care Don’t care
Don’t care even byte
Don’t care odd byte
odd byte
odd byte
Din
even byte
even byte
High-Z
even byte
Don’t care
High-Z
odd byte