ATA20 White Electronic Designs Corporation, ATA20 Datasheet - Page 43

• 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
Sector Transfer Protocol
1. Sector read: 1 sector read procedure after the card configured I/O interface is shown as follows.
7PxxxATA20xxC25
A0 to A10
D0 to D15
-IOWR
-IORD
Set the head No. of drive head register
-IREQ
-CE1
-CE2
Read 256 times the data (512 bytes)
Set the cylinder low / high register
Set “01H” in sector count register
Set “20H” in command register
Set the sector number register
Wait the command input
Read Status register
Read Status register
4H 5H 6H 3H 2H 7H
Start
58H
50H
(1)
01H20H 80H
(2)
7H
43
(3)
(4) Burst data transfer
(2)
7H
58H (Transfer data)
(3)
(1) Set the logical sector number
(5)
White Electronic Designs Corporation [phone]
0H
I/O Access index = 1
(4)
0H
80H
7H
(5)
50H
7H