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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 tAICSI, but how much time it takes to turn to inactive condition is
determined by pull up resistance, output impedance and line capacitance.
tASW tAHW tAICSI
tA tB
tAICSV
tCICSV tDS tDH
tWCY
tWER
tWE
DA2, DA1, DA0
-CS0, -CS1
-DIOW
DD15∼DD0
-IOCS16
IORDY