Deskstar 7K500 and Deskstar E7K500 Hard Disk Drive Specification
39
6.8.5 Initiating Write DMA
Table 33: Ultra DMA cycle timing chart (Initiating Write)
Table 34: Ultra DMA cycle timings (Initiating Write)
PARAMETER DESCRIPTION
(all values in ns)
MODE 0MODE 1MODE 2MODE 3MODE 4MODE 5MODE 6
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX
tUI Unlimited interlock time 0–0–0–0–0–0–0--
tACK Setup time for DMACK- 20 – 20 – 20 – 20 – 20 – 20 – 20 --
tENV Envelope time 20 70 20 70 20 70 20 55 20 50 20 50 20 50
tZIORDYMinimum time before driving IORDY0–0–0–0–0–0–0--
tLI Limited interlock time 0 150 0 150 0 150 0 100 0 100 0 60 0 60
tCYC Cycle time 112 – 73 – 54 – 39 – 25 – 16.8 – 13.0 --
t2CYC Two cycle time 230 – 154 – 115 – 86 – 57 – 38 – 29 --
tDS Data setup time at device 15–10–7–7–5–4–2.6--
tDH Data Hold time at device 5–5–5–5–5–4.6–3.5--
HSTROBE
DDMARDY-
DMACK-
DMARQ
STOP
tUI
tACK
tENV
tZIORDY
tLI
tUI tCYC
t2CYC
DD(15:0)
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Host drives DD
tDH
tDS
WT Data
WT Data
WT Data
tACK
tCYC
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