xPC Target

DT2821 Digital Output

DT2821 series boards have two I/O ports, each containing 8 digital I/O lines. These ports can be configured independently for either input or output. Use a separate driver block for each port. By selecting the digital output driver block for a given port, that port is configured for output.

Scaling of Input to Output

Hardware Output	Block Input Data Type	Scaling
TTL	double	<0.5 = TTL low >0.5 = TTL high

Driver Block Parameters

Port -- From the list, choose 1 or 2.

Channel vector -- Enter numbers between 1 and 8. This driver allows the selection of individual digital output lines in any order. The number of elements defines the number of digital lines you use.

For example, to use all of the digital outputs for this port, enter

• [1,2,3,4,5,6,7,8]
  

Number the lines beginning with 1 even if the board manufacturer starts numbering the lines with 0.

Sample time -- Enter a base sample time or a multiple of the base sample time.

Base address -- Enter the base address of the board. This entry must corresponds to the DIP-switch settings on the board. For example, if the base address is 300 (hexadecimal), enter

• 0x300
  

DT2821 Digital Input

DT2821-F-8DI