Figure 10. Sustained Synchronous Dma Burst - Seagate Medalist 2520 Product Manual

Medalist 2520 Product Manual, Rev. A
The drive operates 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 10. 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
Tdvs
time (at sender)
Data valid hold time
Tdvh
(at sender)
Note. Mode values show minimum time only.
Tdvs Tdvs
Tdvh
Tcyc
T2cyc
T2cyc
Tds Tds
Tdh
Mode 0 Mode 1
125 nsec 94 nsec
250 nsec 188 nsec
15 nsec 10 nsec
5 nsec 5 nsec
70 nsec 48 nsec
6 nsec 6 nsec
41
Tdvh
Tdh
Mode 2
62.5 nsec
125 nsec
7 nsec
5 nsec
34 nsec
6 nsec