Motorola CPV5300 CompactPCI Installation Manual page 56

Pin Assignments for CPV5300 SBC Front Panel and CPV5300 TM Rear Panel Connectors
A
Table A-11. SCSI Connector Pin Assignments for the CPV5300 Single
Board Computer and CPV5300 Transition Module (Continued)
Pin
Number
21 GND
22 GND
23 GND
24 GND
25 GND
26 GND
27 GND
28 GND
29 GND
30 GND
31 GND
32 GND
33 GND
34 GND
A-12
Signal Signal
Mnemonic Description
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Pin Signal
Number Mnemonic
55 ATN-
56 GND
57 BUSY-
58 ACK-
59 RESET-
60 MSG-
61 SEL-
62 CD-
63 REQ-
64 IO-
65 D8
66 D9
67 D10
68 D11
Signal Description
Driven as an initiator
when a special condition
occurs.
Ground
Driven by initiator as a
hand-shake during
arbitration
An initiator asserts ACK
to indicate a byte is ready
for or was received from
the target
hard reset
asserted = message phase
deasserted =
command/data phase
Driven after a successful
arbitration to select as an
initiator or reselect as a
target
asserted = command or
message phase
deasserted = data phase
Target asserts REQ to
indicate a byte is ready or
is needed by target
asserted = In
deasserted = Out
SCSI data lines
SCSI data lines
SCSI data lines
SCSI data lines