Fujitsu MCJ3230SS manual Fast Scsi Timing specifications, BUS Free phase

4.5 Timing Rule

Table 4.76 FAST SCSI Timing specifications

No.	Name	Standard		Timing specification
18	Fast Assertion	30 ns min.	In FAST SCSI data transfer mode, minimum
	Period		pulse width of an ACK signal sent by INIT and
			an REQ signal sent by TARG for synchronous
			data transfer.
19	Fast Cable Skew	5 ns max.	In FAST SCSI data transfer mode, maximum
	Delay		allowable difference in transmission time over
			the interface cable between any two bus signals
			from any two SCSI devices.
20	Fast Deskew	20 ns min.	In FAST SCSI data transfer mode, time for
	Delay		compensation for skew involved in bus signal
			transmission.
21	Fast Hold Time	10 ns min.	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.
22	Fast Negation	30 ns min.	In FAST SCSI data transfer mode, the minimum
	Period		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.

Figure 4.4 BUS FREE phase

C156-E224-01EN 4-49