Device Terminating Read Dma; Table 25: Ultra Dma Cycle Timing Chart (Host Pausing Read); Table 26: Ultra Dma Cycle Timings (Device Terminating Read) - Hitachi HDT725025VLA380 - Deskstar 0A33423 T7K500 250GB SATA 7200RPM 8MB Cache Hard Drive Specifications

6.9.4 Device Terminating Read DMA

Table 25: Ultra DMA cycle timing chart (Host pausing Read)

DMARQ
DMACK-
STOP
HDMARDY-
DSTROBE
DD(15:0)
Device drives DD

Table 26: Ultra DMA cycle timings (Device Terminating Read)

PARAMETER DESCRIP-
TION
(all values in ns)
tSS Time from DSTROBE edge
to negation of DMARQ
tLI Limited interlock time
tAZ Maximum time allowed for
output drivers to release
tZAH Maximum delay time
required for output
tMLI Interlock time with minimum
tCS CRC word setup time at
device
tCH CRC word hold time at
device
tACK Hold time for DMACK-
tIORDYZ Maximum time before
releasing IORDY
tSS
tLI
tLI
tAZ
xxxxxx
tZAH
MODE 0 MODE 1
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX
50 – 50
0 150 0 150
– 10 – 10
20 – 20
20 – 20
15 – 10
5 – 5
20 – 20
– 20 – 20
Deskstar T7K500 Hard Disk Drive Specification
tMLI
tLI tIORDYZ
xxxxxxxxxxxxxxxxxx
Host drives DD
MODE 2 MODE 3
– 50 – 50 –
0 150 0 100
– 10 – 10
– 20 – 20 –
– 20 – 20 –
– 7 – 7 –
– 5 – 5 –
– 20 – 20 –
– 20 – 20
35
tACK
tACK
tCH
tCS
xxxxxxxxxx
CRC
MODE 4 MODE 5
50 – 50 –
0 100 0 75
– 10 – 10
20 – 20 –
20 – 20 –
5 – 5 –
5 – 5 –
20 – 20 –
– 20 – 20
MODE 6
50 –
0 60
– 10
20 –
20 –
5 –
5 –
20 –
– 20