IBM IC25N020ATDA04 - Travelstar 20 GB Hard Drive - Host Pausing Read DMA; Figure 44. Ultra DMA Cycle Timings (Host Pausing Read)

7.9.2 Host Pausing Read DMA
DSTROBE
HDMARDY-
DMACK-
DMARQ
tSR
STOP
tRFS
50–60–60–60–70–75–
HDMARDY- to final
DSTROBE time
tRFS
––––––20–30–50–
DSTROBE to HDMARDY-
time
tSR
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MODE 5
MODE 4
MODE 3
MODE 2
MODE 1
MODE 0
PARAMETER DESCRIPTION
Note: When a host does not satisfy the tSR timing, the host should be ready to receive two more data
words after HDMARDY- is negated.
Figure 44. Ultra DMA cycle timings (Host Pausing Read)
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
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