Logic Output

Logic Output blocks accept logic signals which control the state of the corresponding Logic I/O terminals on a Tesira device.

Initialization Dialog

Name	Description
Channel Count	The number of logic outputs to be added
Equipment Type	Specifies what type of hardware the Compiler should allocate the block to. Review the Equipment Type section for more details
Enable Powered Outputs	Logic Outputs can be configured to supply up to 10mA of current (at a voltage of 4.3 to 5 volts) to a connected device, which is intended to power an LED. In general, it is recommended that only one LED be powered from each logic output, as powering multiple LED’s from a single logic output may result in a significant reduction in LED brightness.

 

DSP Block Representation

If 'Enable Powered Outputs' has NOT been selected:

If 'Enable Powered Outputs' has been selected:

Control Dialog

Name	Description
Dev. IO	Displays the physical Logic I/O channel(s) on the Tesira device this block has been assigned
Identifier	Provides for a custom text label for the channel
Invert	Flips the function of the logic signal being accepted by the Logic Output block. When inverted, a Logic Output will open its output in response to a LOW logic signal, and it will close its output in response to a HIGH logic signal.

Operation

When a Logic Output block receives a LOW logic signal, the corresponding logic output will “close” (i.e., the logic output will be shorted to ground, or more specifically, the voltage between the logic output and ground will be less than approximately 0.5 volts).

When a Logic Output block receives a HIGH logic signal, the corresponding logic output will “open” (i.e. the logic output will be open to ground, or more specifically, the voltage between the logic output and ground will be between approximately 2.7 volts and 5 volts).