Digital I/O Signal Connections; Table 3-3. Port C Signal Assignments - National Instruments PCI-DIO-96 User Manual

Chapter 3 Signal Connections
Table 3-3 shows both the port C signal assignments and the terminology correlation
Note
between different documentation sources. The 82C55A terminology refers to the different
82C55A configurations as modes whereas NI-DAQmx, Traditional NI-DAQ (Legacy),
LabWindows/CVI, and LabVIEW documentation refers to them as handshaking and no
handshaking. On the PCI-DIO-96 and PXI-6508, these signal assignments are the same for
all four 82C55A PPIs. Refer to Table 3-1 for more information.
Configuration Terminology
82C55A/
PCI-DIO-96/
PXI-6508/ National
PCI-6503 Instruments
User Manual Software
Mode 0 No
(Basic I/O) Handshaking
Mode 1 Handshaking
(Strobed Input)
Mode 1 Handshaking
(Strobed
Output)
Mode 2 Handshaking
(Bidirectional
Bus)
Notes: Indicates that the signal is active low.
Subscripts A and B denote port A or port B handshaking signals.

Digital I/O Signal Connections

PCI-DIO-96/PXI-6508/PCI-6503 User Manual

Table 3-3. Port C Signal Assignments

APC7, APC6,
BPC7, BPC6,
CPC7, CPC6,
or or
DPC7 DPC6
I/O I/O
I/O I/O
OBF * ACK *
A A
OBF * ACK *
A A
Pins 1 through 48 and, on the PCI-DIO-96 and PXI-6508, pins 51 through
98 of the I/O connector are digital I/O signal pins. The following
specifications and ratings apply to the digital I/O lines. The maximum input
logic high and output logic high voltages assume a V
5.0 V.
The absolute maximum voltage rating is −0.5 to +5.5 V with respect to
GND. For more information on the digital I/O signal specifications, refer to
Appendix A, Specifications.
Signal Assignments
APC5, APC4, APC3,
BPC5, BPC4, BPC3,
CPC5, CPC4, CPC3,
or or or
DPC5 DPC4 DPC3
I/O I/O I/O
IBF STB * INTR
A A
I/O I/O INTR
IBF STB * INTR
A A
3-8
APC2, APC1,
BPC2, BPC1,
CPC2, CPC1,
or or
DPC2 DPC1
I/O I/O
STB * IBFB
A B B
ACK * OBF *
A B B
I/O I/O
A
supply voltage of
cc
APC0,
BPC0,
CPC0,
or
DPC0
I/O
INTR
B
INTR
B
I/O
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