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Deskstar 7K250 Hard Disk Drive Specification

7.8.4 Device Terminating Read DMA

Figure 12 : Ultra DMA cycle timings (Device Terminating Read)

PARAMETER DESCRIPTION

(all values in ns)

MODE 0MODE 1MODE 2MODE 3MODE 4MODE 5

MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX

tSS Time from DSTROBE edge to

negation of DMARQ

50–50–50–50–50–50–

tLI Limited interlock time 0 150 0 150 0 150 0 100 0 100 0 75

tAZ Maximum time allowed for output

drivers to release

–10–10–10–10–10–10

tZAH Maximum delay time required for

output

20–20–20–20–20–20–

tMLI Interlock time with minimum 20 – 20 – 20 – 20 – 20 – 20 –

tCS CRC word setup time at device 15 – 10 – 7 – 7 – 5 – 5 –

tCH CRC word hold time at device 5–5–5–5–5–5–

tACK Hold time for DMACK- 20 – 20 – 20 – 20 – 20 – 20 –

tIORDYZ Maximum time before releasing

IORDY

–20–20–20–20–20–20

DSTROBE

HDMARDY-

DMACK-

DMARQ

STOP

tMLI

DD(15:0)

tZAH

xxxxxxxxxxxxxxxxxx

Device drives DD

Host drives DD

tCH

tCS

CRC

tACK

tLI

tIORDYZ

xxxxxx xxxxxxxxxx

tSS

tLI

tAZ

Capacity	250 GB
Form Factor	3.5 inch
RPM	7200
Cache	8 MB
Average Seek Time	8.5 ms

Hitachi 7K250 - Deskstar - Hard Drive User Manual

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Hitachi 7K250 - Deskstar - Hard Drive Specifications

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