Pci-6025E Only; Figure 4-11. Digital I/O Connections Block Diagram - National Instruments DAQ PCI-6023E User Manual

Chapter 4 Signal Connections

PCI-6025E Only

+5 V
LED
+5 V
PCI-6023E/6024E/6025E User Manual
switch shown in the figure. Digital output applications include sending
TTL signals and driving external devices such as the LED shown in the
figure.
The PCI-6025E board uses an 82C55A PPI to provide an additional 24
lines of digital I/O that represent three 8-bit ports: PA, PB, and PC. Each
port can be programmed as an input or output port.
Figure 4-11 depicts signal connections for three typical digital I/O
applications.
TTL Signal
Switch
I/O Connector

Figure 4-11. Digital I/O Connections Block Diagram

GND
DIO Board
4-22
Port A
PA<3..0>
Port B
PB<7..4>
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