IBM Deskstar 120 GXP, Specifications

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6.2.4.4 Device Terminating Read DMA
DSTROBE
HDMARDY-
DMACK-
DMARQ
STOP
tMLI
tLI
DD(15:00)
tZAH
xxxxxxxxxxxxxxxxxx
Device drives DD
Host drives DD
tCH tCS
CRC
tSS
tACK
tACK
tLI
tIORDYZ
xxxxx
xxxxxxxxxx
tAZ
tLI
Figure 33. Ultra DMA cycle timing chart (Device terminating Read)
20 – 20 – 20 – 20 – 20 – 20 –
Maximum time before releasing
IORDY
tIORDYZ
– 20 – 20 – 20 – 20 – 20 – 20 Hold time after DMACK– tACK
– 5 – 5 – 5 – 5 – 5 – 5
CRC word hold time (at device
side)
tCH
– 5 – 5 – 7 – 7 – 10 – 15
CRC word setup time (at device
side)
tCS
– 20 – 20 – 20 – 20 – 20 – 20 Interlock time with minimum tMLI
– 20 – 20 – 20 – 20 – 20 – 20
Minimum delay time required
for output
tZAH
10 – 10 – 10 – 10 – 10 – 10 –
Maximum time allowed for
output drivers to release
tAZ
75 0 100 0 100 0 150 0 150 0 150 0 Limited interlock time tLI
– 50 – 50 – 50 – 50 – 50 – 50
Time from DSTROBE edge to
negation of DMARQ
tSS
MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN
MODE5 MODE4 MODE3 MODE2 MODE1 MODE0
PARAMETER DESCRIPTION
(all values in ns)
Figure 34. Ultra DMA cycle timings (Device Terminating Read)
Deskstar 120GXP hard disk drive specifications
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