Figure 4.4 Bus Free Phase; Table 4.76 Fast Scsi Timing Specifications - Fujitsu MCJ3230SS Product Manual

No. Name
18 Fast Assertion
Period
19 Fast Cable Skew
Delay
20 Fast Deskew
Delay
21 Fast Hold Time
22 Fast Negation
Period
C156-E224-01EN

Table 4.76 FAST SCSI Timing specifications

Standard
30 ns min.
5 ns max.
20 ns min.
10 ns min.
30 ns min.

Figure 4.4 BUS FREE phase

Timing specification
In FAST SCSI data transfer mode, minimum
pulse width of an ACK signal sent by INIT and
an REQ signal sent by TARG for synchronous
data transfer.
In FAST SCSI data transfer mode, maximum
allowable difference in transmission time over
the interface cable between any two bus signals
from any two SCSI devices.
In FAST SCSI data transfer mode, time for
compensation for skew involved in bus signal
transmission.
In FAST SCSI data transfer mode, the minimum
time during which the transfer data on the
DATA BUS from the leading edge of the REQ
or ACK signal pulse must be maintained to
compensate for the hold time in the SCSI device
receiving data.
In FAST SCSI data transfer mode, the minimum
time from the trailing edge of an REQ signal to
the leading edge of the next REQ signal, or from
the trailing edge of an ACK signal to the leading
edge of the next ACK signal.
4.5 Timing Rule
4-49