Host Pausing Read Dma; Table 26.Ultra Dma Cycle Timing Chart (Host Pausing Read); Table 27.Ultra Dma Cycle Timings (Host Pausing Read) - Hitachi 7K80 - Deskstar - Hard Drive Specifications

6.8.2 Host Pausing Read DMA

Table 26: Ultra DMA cycle timing chart (Host pausing Read)
DMARQ
DMACK-
STOP
HDMARDY-
DSTROBE
Table 27: Ultra DMA cycle timings (Host pausing Read)
PARAMETER
DESCRIPTION
(all values in ns)
tSR DSTROBE to
HDMARDY- time
tRFS HDMARDY- to final
DSTROBE time
Note: When a host does not satisfy tSR timing, it should be ready to receive two more data words after HDMARDY
- is negated.
tSR
MODE 0 MODE 1
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX
– 50 – 30
– 75 – 70
Deskstar 7K80 Hard Disk Drive Specification
tRFS
MODE 2 MODE 3
– 20 – –
– 60 – 60
43
MODE 4 MODE 5
– – – –
– 60 – 50
MODE 6
– –
– 50