Travelstar 5K160 (PATA) Hard Disk Drive Specification
45
/
188
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
PARAMETER
DESCRIPTION
MODE0 MODE1 MODE2 MODE3 MODE4 MODE5
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-
assertion
20 – 20 – 20 – 20 – 20 – 20 –
tENV Envelope
time 20 70 20 70 20 70 20 55 20 55 20 50
tZIORD Minimum
time
before driving
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
tAZD 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
–
Figure 7. Ultra DMA cycle timings (Initiating Read)
DSTROBE
HDMARDY-
DMACK-
DMARQ
STOP
tUI
tACK
tENV
tACK
tENV
tZIORDY
tFS
tCYC
t2CYC
DD(15:0)
tAZD
tAZ
xxxxxxxxxxxxxxxxxxxxxxxxx
xxx
xxx
xxx
Host drives DD
Device drives DD
tDH
tDS
RD Data
RD Data
RD Data
tCYC