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

7.8.7 Device Terminating Write DMA

DMARQ
DMACK-
STOP
DDMARDY-
HSTROBE
DD(15:0)
PARAMETER
DESCRIPTION
(all values in ns)
tRFS DDMARDY- to final HSTROBE
time
tRP Ready to pause time
tLI Limited interlock time
tMLI Interlocking time with minimum
tCS CRC word setup time at device
tCH CRC word hold time at device
tACK Hold time for DMACK-negation
tIORDYZ Maximum time before releasing
IORDY
tRP
tRFS
xxx WT Data xxxxxxxxxxxxxxxxxxxxxxxxxx
MODE 0
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX
–
160
0 150
20
15
5
20
–
Figure 8: Ultra DMA cycle timings (Device TerminatingWrite)
Deskstar 7K250 Hard Disk Drive Specification
tLI tMLI
tIORDYZ
tLI
Host drives DD
MODE 1 MODE 2
75 – 70 –
– 125 – 100
0 150 0
– 20 – 20
– 10 – 7
– 5 – 5
– 20 – 20
20 – 20 –
58
tACK
tACK
tCH
tCS
xxxxxxxxxx
CRC
MODE 3 MODE 4
60 – 60 –
– 100 – 100
150 0 100 0
– 20 – 20
– 7 – 5
– 5 – 5
– 20 – 20
20 – 20 –
MODE 5
60 – 50
– 85 –
100 0 75
– 20 –
– 5 –
– 5 –
– 20 –
20 – 20