7.9.6 Device Pausing Write DMA
DMARQ
DMACK-
STOP
DDMARDY-
HSTROBE
PARAMETER DESCRIPTION
tSR
HSTROBE to DDMARDY- time
tRFS
DDMARDY- to final HSTROBE
time
Note: When a device does not satisfy the tSR timing, the device is ready to receive two more data words
after DDMARDY- is negated.
Figure 45. Ultra DMA cycle timings (Device Pausing Write)
tSR
MODE 0
MIN
(ns)
–
–
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
tRFS
MODE 1
MODE 2
MAX
MIN
MAX
MIN
MAX
(ns)
(ns)
(ns)
(ns)
(ns)
50
–
30
–
20
75
–
70
–
60
55
MODE 3
MODE 4
MODE 5
MIN
MAX
MIN
MAX
MIN
(ns)
(ns)
(ns)
(ns)
(ns)
–
–
–
–
–
–
60
–
60
–
MAX
(ns)
–
50