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10.4 Host Interface Timing

10.4.1 Program I/O Write Timing

DA2, DA1, DA0 -CS0, -CS1

tASW

tAHW

tAICSI

-DIOW

tWE

 

tWER

 

 

tWCY

DD15∼DD0

tCICSV

tDS

tDH

-IOCS16

tAICSV

tA tB

IORDY

 

 

 

 

Transfer mode

 

 

Symbol

Meaning

 

0

1

2

3

4

tASW

Address Setup to -DOW Low

(min.)

70

50

30

30

25

tDS

Data Setup to -DOW High

(min.)

60

45

30

30

20

tWE

-DOW Pulse Width

(min.)

165

125

100

80

70

tDH

Data Hold from -DOW High

(min.)

30

20

15

10

10

tAHW

ADDR Hold from -DOW High

(min.)

20

15

10

10

10

tWER

-DOW Inactive

(min.)

-

-

-

70

25

tWCY

Write Cycle Time

(min.)

600

383

240

180

120

tCICSV

-IOCS16 valid from -CS

(max.)

90

50

40

n/a*

n/a*

tAICSV

-IOCS16 valid from address

(max.)

90

50

40

n/a*

n/a*

tAICSI

-IOCS16 inactive from address

(max.)

60

45

30

n/a*

n/a*

tA

IORDY Setup time

(max.)

35

35

35

35

35

tB

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 tAICSI, but how much time it takes to turn to inactive condition is determined by pull up resistance, output impedance and line capacitance.

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