Host Terminating Write Dma - Hitachi 7K250 - Deskstar - Hard Drive Specifications

7.8.8 Host Terminating Write DMA

DMARQ
DMACK-
STOP
DDMARDY-
HSTROBE
DD(15:0)
PARAMETER
DESCRIPTION
(all values in ns)
tSS Time from HSTROBE edge to
assertion of STOP
tLI Limited interlock time
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
tLI
tSS
tLI
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MODE 0
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX
50
0 150
20
15
5
20
–
Figure 9: Ultra DMA cycle timings (Host Terminating Write)
Deskstar 7K250 Hard Disk Drive Specification
tIORDYZ
tLI
Host drives DD
MODE 1 MODE 2
– 50 – 50
0 150 0
– 20 – 20
– 10 – 7
– 5 – 5
– 20 – 20
20 – 20 –
59
tMLI
tACK
tACK
tCH
tCS
CRC xxxxxxxxxx
MODE 3 MODE 4
– 50 – 50
150 0 100 0
– 20 – 20
– 7 – 5
– 5 – 5
– 20 – 20
20 – 20 –
MODE 5
– 50 –
100 0 75
– 20 –
– 5 –
– 5 –
– 20 –
20 – 20