Motorola MVME712-12 Connector Scsi Interface Interconnect Signals MVME712B, GND Ground REQ

Interconnect Signals

Table 3-6. Connector J3 Interconnect Signals (LCP2 Adapter) (Continued)

Pin	Signal	Signal Name and Description
Number	Mnemonic
46	D/C*	DATA/COMMAND - signal driven by the
		target. It indicates whether command or data
		information is on the data bus. True (low)
		indicates command.
47	GND	GROUND
48	REQ*	REQUEST - signal driven by a target to indicate
		a request for a REQ/ACK data transfer
		handshake.
49	GND	GROUND
50	O/I*	OUTPUT/INPUT - signal driven by a target that
		controls the direction of data movement on the
		bus. True (low) indicates input to the initiator.
		False (high) indicates output from the initiator.
		This signal is also used to distinguish between
		selection and reselection phases.

Connector SCSI INTERFACE Interconnect Signals (MVME712B)

Each pin connection, signal mnemonic, and signal characteristic for the connector is listed in Table 3-7.

Table 3-7. SCSI INTERFACE Interconnect Signals (MVME712B)

Pin	Signal	Signal Name and Description
Number	Mnemonic
1-25	GND	GROUND
26	DB00*	DATA bus (bit 0) - least signiÞcant bit and the
		lowest priority during the arbitration phase.
27	DB01*	DATA bus (bit 1)
28	DB02*	DATA bus (bit 2)
29	DB03*	DATA bus (bit 3)
30	DB04*	DATA bus (bit 4)
31	DB05*	DATA bus (bit 5)
32	DB06*	DATA bus (bit 6)

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MVME712A/D3 3-11