IBM DARA-206000 Hard Drive Specifications - Page 54
Ultra DMA Timings
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6.5.3 Ultra DMA Timings The Ultra DMA timing meets Mode 0,1,2,3 and 4 of the Ultra DMA Protocol. 6.5.3.1 Initiating Read DMA DMARQ DMACK STOP HDMARDY DSTROBE DB(15:00) < Tui > Tzrdy > < < < Tfs > < T2cyc > Tcyc > < Tcyc > Taz < > XXXXXXXXXXXXXXX > Host drives DB < > Tzad > Tdvs Tdvh < XXX RD Data XXX RD Data XXX RD Data < Device drives DB Figure 32. Ultra D M A cycle time chart (Initiating Read) 44 OEM Specifications of DARA-2xxxxx 2.5 inch H D D Rev 2.1
6.5.3
Ultra DMA Timings
The Ultra DMA timing meets Mode 0,1,2,3 and 4 of the Ultra DMA Protocol.
6.5.3.1
Initiating Read DMA
DMARQ
<
Tui
>
DMACK
<Tack> <Tenv>
STOP
<Tack> <Tenv>
HDMARDY
<
T2cyc
>
Tzrdy >
<
<
Tfs
><
Tcyc
><
Tcyc
>
DSTROBE
Taz < >
< > Tzad
> Tdvs Tdvh <
DB(15:00)
XXXXXXXXXXXXXXX
XXX
RD Data
XXX
RD Data
XXX
RD Data
>
<
Host drives DB
Device drives DB
Figure 32. Ultra DMA cycle time chart (Initiating Read)
44
OEM Specifications of DARA-2xxxxx 2.5 inch HDD Rev 2.1