Specifications

14 National Instruments
14-18
Scaling Input to Output
Driver 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 any 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
[1,2,3,4,5,6,7,8]
Number the lines beginning with 1 even if the board manufacture starts
numbering the lines with 0.
Port - From the list choose either PIA A, or PCA B. The I/O board has a
MC6821 chip with 2 ports. The Port parameter defines which port of the
MC6821 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 needed for each port.
Sampletime - Enter a base sample time or a multiple of the base sample time.
BaseAddress - 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
PC-TIO-10 Digital Output
The PC-TIO-10 has one MC6821 chip with 2 ports (PIA A, PIA B). Each port
has a maximum of 8 digital I/O lines that can be configured as inputs or
outputs.
Use a separate diver block for each port. By selecting the digital output driver
block, the port is configured as output.
Hardware Input Block Output Data Type Scaling
TTL double TTL low = 0.0
TTL high = 1.0