Hitachi HTS421210H9AT00, Specifications

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Travelstar 4K120 Hard Disk Drive Specification
47
7.9 Ultra DMA timings
The Ultra DMA timings meet Mode 0, 1, 2, 3, 4 and 5 of the Ultra DMA Protocol.
7.9.1 Initiating Read DMA
Table 32: Ultra DMA cycle timings (Initiating Read)
PARAMETER
DESCRIPTION
MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 MODE 5
MIN
(ns) MAX
(ns)
MIN
(ns) MAX
(ns)
MIN
(ns) MAX
(ns)
MIN
(ns) MAX
(ns)
MIN
(ns) MAX
(ns)
MIN
(ns) MAX
(ns)
tUI Unlimited interlock time 0 – 0 – 0 – 0 – 0 – 0 –
tACK Setup time for DMACK- 20 – 20 – 20 – 20 – 20 – 20 –
tENV Envelope time 20 70 20 70 20 70 20 55 20 55 20 50
tZIORDY Minimum time before driv-
ing IORDY
0 – 0 – 0 – 0 – 0 – 0 –
tFS First DSTROBE time 0 230 0 200 0 170 0 130 0 120 0 90
tCYC Cycle time 112 – 73 – 54 – 39 – 25 – 16.8 –
t2CYC Two cycle time 230 – 154 – 115 – 86 – 57 – 38 –
tAZ Maximum time allowed for
output drivers to release – 10 – 10 – 10 – 10 – 10 – 10
tZAD Drivers to assert 0 – 0 – 0 – 0 – 0 – 0 –
tDS Data setup time at host 15 – 10 – 7 – 7 – 5 – 4 –
tDH Data hold time at host 5 – 5 – 5 – 5 – 5 – 4.6 –
DSTROBE
HDMARDY-
DMACK-
DMARQ
STOP
tUI
tACK tENV
tACK tENV
tZIORDY
tFS tCYC
t2CYC
DD(15:0)
tZAD
tAZ
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Host drives DD
Device drives DD
tDH
tDS
RD Data RD Data
RD Data
tCYC