Connector Scsi Interface Interconnect Signals (Mvme712B) - Motorola MVME712-12 User Manual

Table 3-6. Connector J3 Interconnect Signals (LCP2 Adapter) (Continued)
Pin
Number
46 D/C*
47 GND
48 REQ*
49 GND
50 O/I*

Connector SCSI INTERFACE Interconnect Signals (MVME712B)

Each pin connection, signal mnemonic, and signal characteristic for the
connector is listed in
Table 3-7. SCSI INTERFACE Interconnect Signals (MVME712B)
Pin
Number
1-25 GND
26 DB00*
27 DB01*
28 DB02*
29 DB03*
30 DB04*
31 DB05*
32 DB06*
MVME712A/D3
Signal
Mnemonic
DATA/COMMAND - signal driven by the
target. It indicates whether command or data
information is on the data bus. True (low)
indicates command.
GROUND
REQUEST - signal driven by a target to indicate
a request for a REQ/ACK data transfer
handshake.
GROUND
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.
Table 3-7
.
Signal
Mnemonic
GROUND
DATA bus (bit 0) - least signiÞcant bit and the
lowest priority during the arbitration phase.
DATA bus (bit 1)
DATA bus (bit 2)
DATA bus (bit 3)
DATA bus (bit 4)
DATA bus (bit 5)
DATA bus (bit 6)
Interconnect Signals
Signal Name and Description
Signal Name and Description
3
3-11