Figure 11. Sustained Synchronous Dma Burst - Seagate Medalist Pro 9140 Product Manual

42 Medalist Pro 9140, 6530 and 4520 Product Manual, Rev. B
The drives operate at sustained synchronous DMA burst timing specifi-
cations, as shown below.
Strobe at
Sender
Data at
Sender
Tdvh
Tcyc
Strobe at
Receiver
Data at
Receiver
Tdh

Figure 11. Sustained synchronous DMA burst

Time Description
Tcyc Cycle time
T2cyc Two Cycle times
Data setup time
Tds
(at receiver)
Data hold time
Tdh
(at receiver)
Data valid setup
Tdv
time (at sender)
Data valid hold time
Tdvs
(at sender)
Note. Mode values show the minimum time only. Maximum values do
not apply.
Tdvs Tdvs
Tdvh
Tcyc
T2cyc
T2cyc
Tds
Tds
Tdh
Mode 0 Mode 1
114 nsec 75 nsec
235 nsec 156 nsec
15 nsec 10 nsec
3 nsec 3 nsec
75 nsec 48 nsec
6 nsec 6 nsec
Tdvh
Tdh
Mode 2
55 nsec
117 nsec
7 nsec
3 nsec
34 nsec
6 nsec