IBM IC35L020 - Deskstar 20 GB Hard Drive - 9.1.7.3 Host Terminating Read DMA

9.1.7.3 Host Terminating Read DMA
DSTROBE
HDMARDY-
DMACK-
DMARQ
STOP
tMLI
tRP
DD00–DD15
tZAH
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xxx
Host drives DD
Device drives DD
tCHtCS
CRC
tLI
tACK
tACK
tRFS
tLI
xxx
RD Data
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tAZ
tIORDYZ
(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 word 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
–85–100–100–100–125–160Ready to pause timetRP
50–60–60–60–70–75–Ready to final strobe timetRFS
MAXMIN MAXMIN MAXMIN MAXMIN MAXMIN MAXMIN Parameter descriptions
MODE5MODE4MODE3MODE2MODE1MODE0
Signal
names
Figure 29. Ultra DMA cycle timings—Host terminating Read
Deskstar 60 GXP Hard disk drive specification
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