Ultra Dma Timings; Initiating Read Dma; Table 25. Ultra Dma Cycle Timing Chart (Initiating Read); Table 26. Ultra Dma Cycle Timings (Initiating Read) - Hitachi HDS725050KLA360 Specifications

6.8 Ultra DMA timings

The Ultra DMA timings meet Mode 0, 1, 2, and 4 of the Ultra DMA Protocol.

6.8.1 Initiating Read DMA

Table 25: Ultra DMA cycle timing chart (Initiating Read)
DMARQ
DMACK-
STOP
HDMARDY-
DSTROBE
DD(15:0)
Table 26: Ultra DMA cycle timings (Initiating Read)
PARAMETER
DESCRIPTION
(all values in ns)
tUI Unlimited interlock time
tACK Setup time for DMACK-
tENV Envelope time
Minimum time before driving
tZIORDY
IORDY
tFS First DSTROBE time
tCYC Cycle time
t2CYC Two cycle time
Maximum time allowed for out-
tAZ
put drivers to release
tZAD Drivers to assert
tDS Data setup time at host
tDH Data hold time at host
Time from data output
tDZFS released-to-driving until the first
transition of critical timing
tUI
tACK tENV
tACK tENV
tZIORDY
tAZ
xxxxxxxxxxxxxxxxxxxxxxxxxxx
Host drives DD
MODE 0 MODE 1
MIN MAX MIN MAX
0 – 0 –
20 – 20 –
20 70 20 70
0 – 0 –
0 230 0 200
112 – 73 –
230 – 154 –
– 10 – 10
0 – 0 –
15 – 10 –
5 – 5 –
70 – 48 –
Deskstar 7K500 and Deskstar E7K500 Hard Disk Drive Specification
t2CYC
tFS tCYC
tDS
tZAD
xxx xxxx
RD Data RD Data
Device drives DD
MODE 2 MODE 3
MIN MAX MIN MAX
0 0 0 –
20 – 20 –
20 70 20 55
0 – 0 –
0 170 0 130
54 – 39 –
115 – 86 –
– 10 – 10
0 – 0 –
7 – 7 –
5 – 5 –
31 – 20 –
35
tCYC
tDH
xxx
RD Data
MODE 4 MODE 5
MIN MAX MIN MAX
0 – 0 –
20 – 20 –
20 55 20 50
0 – 0 –
0 120 – 90
25 – 17 –
57 – 38 –
– 10 10
0 – 0 –
5 – 4.8 –
5 – 4.8 –
6.7 – 25 –
MODE 6
MIN MAX
0 --
20 --
20 50
0 --
0 80
13 --
29 --
-- 10
0 --
2.6 --
3.5 --
17.5 --