National Instruments PCI-6025E Digital Output

PCI-6025E Digital Output block


Simulink® Real-Time™ Library for National Instruments®

Scaling Input to Output

I/O Module Output

Block Input Data Type




< 0.5 = TTL low
≥ 0.5 = TTL high

Block Parameters

Channel vector

Enter numbers between 1 and 8 to select the digital output lines used with this port. This driver allows the selection of individual digital output lines in arbitrary order. The number of elements defines the number of digital lines used.

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


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


(PCI-6025E 8255) From the list, choose either A, B, or C. The I/O board has an 82C55A chip with 3 ports. The port name defines which port of the 82C55A chip is used for this driver block. Each port has a maximum of 8 digital lines that can be configured as inputs. The PCI-6025E provides 8 digital input lines, the PCI-6025E 8255 provides an additional 24 digital input lines, distributed across the ports A, B, and C. In each case, one block is required for each port.

Reset vector

The reset vector controls the behavior of the channel at model termination. Enter a scalar or a vector that is the same length as the channel vector. If you specify a scalar value, that setting is replicated over the channel vector. If you specify a value of 1, the corresponding channel is reset to the value specified in the initial value vector. If you specify a value of 0, the channel remains at the last value attained while the model was running.

Initial value vector

The initial value vector contains the initial values (0 or 1) of the output channels. Enter a scalar or a vector that is the same length as the channel vector. If you enter a scalar, that value is replicated as the initial value over the channel vector. The channels are set to these initial values between the time the model is downloaded and the time it is started.

Sample time

Enter the base sample time or a multiple of the base sample time (-1 means sample time is inherited).

PCI slot (-1:autosearch)

If only one board of this type is in the target computer, enter -1 to locate the board.

If two or more boards of this type are in the target computer, enter the bus number and the PCI slot number of the board associated with this driver block. Use the format [BusNumber,SlotNumber].

To determine the bus number and the PCI slot number, type:

tg = slrt;
getPCIInfo(tg, 'installed')

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