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Checking the System
3-10
Digital I/O TestDigital I/O Test
The Digital Input/Output test enables you to read data from, or write data to, either 8-bit Digital
I/O port on a UDAS unit. FIGURE 3.8, UDAS SYSCHECK Digital I/O Test shows an example
test of the UDAS unit that has two 8-bit digital I/O ports.
FIGURE 3.8 UDAS SYSCHECK Digital I/O Test
Use the Input and Output radio buttons to select the direction of a port.
The input and output data is displayed in Hexadecimal (0-FF).
Input ports are read and displayed four times per second.
Output data is written to the port only after clicking the Write Output Data button.