PC104-DIO48 Digital Input block
Simulink® Real-Time™ Library for Measurement Computing™
The CIO-DIO48 has two 8255 chips (1,2). Each chip has three ports (A,B,C). Each port has a maximum of 8 digital I/O lines that can be configured as inputs or outputs. Use a separate driver block for each port. By selecting the digital input driver block, the port is configured as input.
I/O Module Input
Block Output Data Type
TTL low = 0.0
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 numbers the lines beginning with 0.
From the list choose either
C. The I/O board has two 8255 chips with 3 ports.
The Port parameter defines which port of the
8255 chip is used for this driver block. Each port has a maximum or
8 digital lines that can be configured as inputs or outputs depending
on which driver block is chosen. In each case, one block is required
for each port.
From the list choose
The Chip parameter defines which of the two 8255
chips is used.
Enter the base sample time or a multiple of the base sample
-1 means sample time is inherited).
Enter the base address of the board. This entry must correspond
to the DIP switch setting on the board. For example, if the DIP switch
setting is 300 (hexadecimal), enter