Fujitsu MCP3130SS, MCP3064SS, MCM3064SS, MCM3130SS manual Timing specifications 2

SCSI BUS

Table 7.7 Timing specifications (2 of 3)

No.	Name	Standard	Timing specification
6	Bus Settle Delay	400 ns min.	Minimum wait period between the time a particular
			control signal condition changes and the time the bus
			condition is stabilized.
7	Cable Skew Delay	3 ns max.	Maximum allowable difference in transmission time
			over the interface cable between any two bus signals
			from any two SCSI devices.
8	Data release Delay	400 ns max.	Maximum allowable period between the time an I/O
			signal changes its status from false to true and the time
			the INIT stops driving data bus signals.
9	Deskew Delay	15 ns min.	Time for compensation for skew involved in bus signal
			transmission.
10	Hold Time	16.5 ns min.	In synchronous 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.
11	Negation Period	15 ns min.	In synchronous 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.
12	Power-On to	10 sec max.	Maximum time from when the TARG is turned on to the
	Selection Time		time the TARG can post the correct status and sense data
			for the TEST UNIT READY, INQUIRY or REQUEST
			SENSE command.
13	Reset to Selection	250 ms max.	Maximum time from when the RESET condition (hard
	Time		RESET) is released to the time the TARG can post the
			correct status and sense data for the TEST UNIT
			READY, INQUIRY or REQUEST SENSE command.
14	Reset Hold Time	25µs min.	The minimum time during which the RST signal must
			be held true to create a RESET condition. A maximum
			time is not defined.
15	Selection Abort	200µs max.	In a SELECTION or RESELECTION phase, the
	Time		maximum allowable period between the time the SCSI
			device recognizes itself as selected and the time it
			replies with a BSY signal.
16	Selection Timeout	250 ms min.	In a SELECTION or RESELECTION phase, the
	Delay	[Recommended	minimum time during which the INIT or TARG waits
		value]	for a BSY signal from the SCSI device to be selected
			before it initiates timeout processing.

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