Table of Contents
Advertisement
Interconnect Signals
Table 3-6. Connector SCSI INTERFACE Interconnect Signals (Continued)
Pin Number
3
44
45
46
47
48
49
50
J5 Connector
3-18
Signal
Mnemonic
ACK*
ACKNOWLEDGE - signal driven by an initiator to
indicate an acknowledgment for a REQ/ACK data
transfer handshake.
RST*
RESET - OR-tied signal that indicates the RESET
condition.
MSG*
MESSAGE - signal driven by the target during the
message phase.
SEL*
SELECT - signal used by an initiator to select a target or
by a target to reselect an initiator.
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.
REQ*
REQUEST - signal driven by a target to indicate a
request for a REQ/ACK data transfer handshake.
O/I*
OUTPUT/INPUT - signal driven by a target which
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 J5 is the port labeled
panel. This is a Centronics type parallel port. Each pin connection,
signal mnemonic, and signal characteristic for the printer port
connector is listed in Table 3-7.
Signal Name and Description
on the MVME712M front
PRINTER
Advertisement
Table of Contents
