IBM DTCA-24090 Hard Drive Specifications - Page 57
Device Pausing Write DMA
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6.5.3.6 Device Pausing Write DMA DMARQ DMACK STOP DDMARDY HSTROBE < Tsr > < Trfs > [nsec] PARAMETER DESCRIPTION MODE0 MODE1 MODE2 MIN MAX MIN MAX MIN MAX Tsr Strobe to ready response time Trfs Ready to final strobe time 50 30 20 75 60 50 Note : When a device does not meet Tsr, it shall be ready to receive 2 more strobes after DDMARDY is negated. Figure 32. Ultra D M A cycle timings (Device pausing Write) Electrical Interface Specifications 49
6.5.3.6
Device Pausing Write DMA
DMARQ
DMACK
STOP
< Tsr >
DDMARDY
<
Trfs
>
HSTROBE
[nsec]
MODE0
MODE1
MODE2
PARAMETER DESCRIPTION
MIN
MAX
MIN
MAX
MIN
MAX
Tsr
Strobe to ready response time
50
30
20
Trfs
Ready to final strobe time
75
60
50
Note : When a device does not meet Tsr, it shall be ready to receive 2
more strobes after
DDMARDY is negated.
Figure 32. Ultra DMA cycle timings (Device pausing Write)
Electrical Interface Specifications
49