Hitachi Deskstar 7K160, Specifications

Page: 46 / 298

Deskstar 7K160 Hard Disk Drive Specification
32
6.9 Ultra DMA timings
The Ultra DMA timings meet Mode 0, 1, 2, and 4, 5 and 6 of the Ultra DMA Protocol.
6.9.1 Initiating Read DMA
Table 20: Ultra DMA cycle timings (Initiating Read)
PARAMETER
DESCRIPTION
(all values in ns)
MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 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 – 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 55 20 50 20 50
tZI-
ORDY Minimum time before
driving IORDY
0 – 0 – 0 – 0 – 0 – 0 – 0 –
tFS First DSTROBE time 0 230 0 200 0 170 0 130 0 120 – 90 0 80
tCYC Cycle time 112 – 73 – 54 – 39 – 25 – 17 – 13 –
t2CYC Two cycle time
230 – 154 – 115 – 86 – 57 – 38
–
29 –
tAZ Maximum time allowed
for output drivers to
release
– 10 – 10 – 10 – 10 – 10 10
–
10
tZAD Drivers to assert 0 – 0 – 0 – 0 – 0 – 0 – 0
–
tDS Data setup time at host 15 – 10 – 7 – 7 – 5 – 4.8 – 2.6
–
tDH Data hold time at host 5 – 5 – 5 – 5 – 5 – 4.8 – 3.5
–
tDZFS Time from data ouput
released-to-driving until
the first transition of crit-
ical timing
70 – 48 – 31 – 20 – 6.7 – 25 – 17.5
–
DSTROBE
HDMARDY-
DMACK-
DMARQ
STOP
tUI
tACK tENV
tACK tENV
tZIORDY
tFS tCYC
t2CYC
DD(15:0)
tZAD
tAZ
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxx xxxx xxx
Host drives DD
Device drives DD
tDH
tDS
RD Data RD Data RD Data
tCYC