User`s guide

12 • Installation
2.6 Connector Pin Assignment
The PCI-7300A comes equipped with one 100-pin SCSI type connector (CN1)
located on the rear mounting plate. The pin assignment of CN1 is illustrated in
the figure 2.2.
Legend:
Pins Signal Name Signal Type
Signal
Direction
Description
1…50 GND GND
Ground – these lines are the ground
reference for all other signals
51..66 PB15…PB0 DATA I/O
PortB bidirectional data liness-PB15
is the MSB, and PB0 is the LSB.
67 DOACK CONTROL I
Digital output Acknowledge lines –
In handshaking mode, DOACK
carries handshaking status
information from the peripheral.
68 DOREQ CONTROL O
Request line – In handshaking
mode, DOREQ carries handshaking
control information to peripheral.
69 DOTRIG CONTROL I
DO TRIG- can be used to control
the start of data output in all DO
modes and to control the stop of
pattern generation in pattern
generation mode.
70…73 AUXDO3…0 DATA O
AUX DO 3…0 – can be used as
extra output data or can be used as
extra control signals.
85..100 PA15…PA0 DATA I/O
PortA bidirectional data liness-PA15
is the MSB, and PA0 is the LSB.
82 DIACK CONTROL O
Digital output Acknowledge lines –
In handshaking mode, DIACK
carries handshaking status
information to the peripheral.
83 DIREQ CONTROL I
Request line – In handshaking
mode, DIREQ carries handshaking
control information from peripheral.
In external clock mode, DIREQ
carries the external clock input.
84 DITRIG CONTROL I
DI TRIG – can be used to control
the start of data acquisition in all DI
modes.
78…81 AUXDI3…0 DATA I
AUX DI 3…0 – can be used as extra
input data or can be used as extra
control signals.
74…77 TERMPWR POWER
TERMPWR -- 4.7V active
terminator power output