THNCF064MMA Datasheet, PDF (31/47 Pages) Toshiba Semiconductor – The THNCFxxxxMA series CompactFlash card is a flash technology based with ATA interface flash memory card

Preliminary
THNCFxxxxMA Series
Sector Transfer Protocol
1. Sector read: Sector read procedure after the card configured I/O interface is shown as follows.
N
“51h”?
Y
error handle
start
Set the cylinder low/high register
Set the head No. of drive head register
Set the sector number register
Set in sector count register
Set “20h” in command register
Read the status register
N
“58h”?
Y
Read 256 times the data register
(512 bytes)
Get all data
N
Y
Wait the command input
I/O Access, INDEX=1
(1) Set the logical sector number
(2) Set read sector command
(3) Polling until ready
(4) Burst data transfer
(5) Read more sectors?
A0~A10
−CE1
−CE2
−IOWR
−IORD
D0~D15
−IREQ
(1)
(2)
4H 5H 6H 3H 2H 7H
(3)
7H 7H
(4)
0H
0H
(5)
7H 7H
01H 20H D0H→58H (Data transfer)
D0H→50H
Note:
If sector count is not equal to 1, the busy time (status is “DXH”) maybe only 1µs, so if host handle step (3) by
polling status “DXH” then polling status “58H”, it could be generated “time out error” because it can not get
status “DXH”.
2002-10-20 31/47