360014937
Copyright © 2000 Toshiba corporation. All rights reserved.
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10.4 Host Interface Timing
10.4.1 Program I/O Write Timing
Transfer
mode
Symbol Meaning
0
1
2
3
4
t
ASW
Address Setup to -DOW Low
(min.)
70
50
30
30
25
t
DS
Data Setup to -DOW High
(min.)
60
45
30
30
20
t
WE
-DOW Pulse Width
(min.)
165
125
100
80
70
t
DH
Data Hold from -DOW High
(min.)
30
20
15
10
10
t
AHW
ADDR Hold from -DOW High
(min.)
20
15
10
10
10
t
WER
-DOW
Inactive
(min.) - - - 70
25
t
WCY
Write Cycle Time
(min.)
600
383
240
180
120
t
CICSV
-IOCS16 valid from -CS
(max.)
90
50
40
n/a*
n/a*
t
AICSV
-IOCS16 valid from address
(max.)
90
50
40
n/a*
n/a*
t
AICSI
-IOCS16 inactive from address
(max.)
60
45
30
n/a*
n/a*
t
A
IORDY Setup time
(max.)
35
35
35
35
35
t
B
IORDY Pulse Width
(max.)
1250
1250
1250
1250
1250
(
*
) -IOCS16 shall be specified in ATA-2 specifications. For other modes, this signal is invalid. The Drive
releases -IOCS16 within the time of t
AICSI
, but how much time it takes to turn to inactive condition is
determined by pull up resistance, output impedance and line capacitance.
t
ASW
t
AHW
t
AICSI
t
A
t
B
t
AICSV
t
CICSV
t
DS
t
DH
t
WCY
t
WER
t
WE
DA2, DA1, DA0
-CS0, -CS1
-DIOW
DD15
∼
DD0
-IOCS16
IORDY
