National Instruments PCI-6025E and PCI-6025E 8255 Digital Input

PCI-6025E and PCI-6025E 8255 Digital Input blocks


Simulink® Real-Time™ Library for National Instruments®

Scaling Input to Output

I/O Module Input

Block Output Data Type




TTL low = 0.0
TTL high = 1.0

Block Parameters

Channel vector

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

For example, to use all of the digital inputs 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.

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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