9.1.7.4 Device Terminating Read DMA
DSTROBE
HDMARDY-
DMACK-
DMARQ
STOP
tMLI
tLI
DD00–DD15
Tzah
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Host drives DD
Device drives DD
tCHtCS
CRC
tSS
tACK
tACK
tLI
tIORDYZ
xxxxx
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tAZ
tLI
(all values are in ns)
20–20–20–20–20–20–
Pull-up time before DSTROBE
release
tIORDYZ
–20–20–20–20–20–20
Hold time after -DMACK
negation
tACK
–5–5–5–5–5–5
CRC word Hold time (at device
side)
tCH
–5–5–7–7–10–15
CRC sord setup time (at device
side)
tCS
–20–20–20–20–20–20Interlocking timetMLI
–20–20–20–20–20–20Output enable timetZAH
10–10–10–10–10–10–Output release timetAZ
75010001000150015001500Limited interlock timetLI
–50–50–50–50–50–50
Time from strobe to stop
assertion
tSS
MAXMIN MAXMIN MAXMIN MAXMIN MAXMIN MAXMIN
Parameter descriptions
MODE5MODE4MODE3MODE2MODE1MODE0
Signal
names
Figure 30. Ultra DMA cycle timings—Device Terminating Read
Deskstar 60 GXP Hard disk drive specification
35
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