Fujitsu MCM3130SS, MCP3064SS, MCM3064SS Timing specifications 3, Scsi BUS Timing specifications

7.5 Timing Rule

Table 7.7 Timing specifications (3 of 3)

No.	Name	Standard	Timing specification
17	Transfer Period	50 ns	In synchronous data transfer mode, the minimum time
			(minimum repetition time) from the leading edge of an
			REQ signal to the leading edge of the next REQ signal
			or from the leading edge of an ACK signal to the
			leading edge of the next ACK signal. The actual value
			is defined using a SYNCHRONOUS DATA
			TRANSFER REQUEST message exchanged between
			the INIT and TARG.

Table 7.8 SCSI BUS Timing specifications

No.	Name	Synchronous data transfer mode			Asynchronous
					data transfer
		Fast-20	Fast-SCSI	SCSI-1	mode
1	Arbitration Delay	2.4∝ s	2.4∝ s	2.4∝ s	2.4∝ s
2	Bus Clear Delay	800ns	800ns	800ns	800ns
3	Bus Free Delay	800ns	800ns	800ns	800ns
4	Bus Settle Delay	400ns	400ns	400ns	400ns
5	Cable Skew Delay	3ns	4ns	4ns	4ns
6	Data Release Delay	400ns	400ns	400ns	400ns
7	Receive Assertion Period	11ns	22ns	70ns	––
8	Receive Hold Time	11.5ns	25ns	25ns	––
9	Receive Negation Period	11ns	22ns	70ns	––
10	Receive Setup Time	6.5ns	15ns	15ns	––
11	Reset Hold Time	25ns	25ns	25ns	25ns
12	Selection Abort Time	200ns	200ns	200ns	200ns
13	Selection Time-out Delay	250ns	250ns	250ns	250ns
14	System Deskew Delay	15ns	20ns	45ns	45ns
15	Transfer Period during	50ns	100ns	200ns	––
	Synchronous Data Transfer Phases
16	Transmit Assertion Period	15ns	30ns	80ns	––
17	Transmit Hold Time	16.5ns	33ns	53ns	––
18	Transmit Negation Period	15ns	30ns	80ns	––
19	Transmit Setup Time	11.5ns	23ns	23ns	––

C156-E228-02EN 7-17