IBM Deskstar 120 GXP, Specifications

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6.2.4.5 Initiating Write DMA
HSTROBE
DDMARDY-
DMACK-
DMARQ
STOP
tUI
tACK tENV
tZIORDY tLI
tUI tCYC tCYC
t2CYC
DD(15:0)
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Host drives DD
tDH
tDS
WT Data WT Data WT Data
tACK
tDH
tDS
Figure 35. Ultra DMA cycle timing chart (Initiating Write)
– 4.6 – 5 – 5 – 5 – 5 – 5 Data hold time (at device side) tDH
– 4 – 5 – 7 – 7 – 10 – 15 Data setup time (at device side) tDS
– 38 – 57 – 86 – 115 – 154 – 230 Two Cycle time t2CYC
– 16.8 – 25 – 39 – 54 – 73 – 112 Cycle time tCYC
75 0 100 0 100 0 150 0 150 0 150 0 Limited interlock time tLI
– 0 – 0 – 0 – 0 – 0 – 0
Minimum time before driving
IORDY
tZIORDY
50 20 55 20 55 20 70 20 70 20 70 20 Envelope time tENV
– 20 – 20 – 20 – 20 – 20 – 20 Setup time before DMACK– tACK
– 0 – 0 – 0 – 0 – 0 – 0 Unlimited interlock time tUI
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 36. Ultra DMA cycle timings (Initiating Write)
Deskstar 120GXP hard disk drive specifications
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