Block

Mask

Description

The National InstrumentsPC-DIO-96 board is a 96-bit parallel digital I/O device from the NI6507/NI6508family.

The board features 4 82C55Parallel Port Interfaces (PPIs). Each PPI controls 24 bits of digital I/O grouped in three 8-bit ports (A, B and C). Each port can be programmed as either inputs or outputs.

This block allows the user to program one port of one PPI as inputs. The block OpPC-DIO-96Digital Out must be used for programming the bits as outputs. MultipleOpPC-DIO-96 Digital In and Digital Out blocks can be inserted in the same model, as long as they do not use the same PPI/Port selection.

Parameters

Inputs

This block has no inputs.

Outputs

At each calculation step of the model, the block returns the current values (0 or 1) on the I/O lines.

If the parameter 'Return acquired data in one single value (range 0 - 255)' is not checked, the individual channel values are returned in a vector. In that case, only the values of the channels specified in the channel list parameter are returned and the outputs are in the order of the channel list parameter. The output width of the block is then equal to the number of entries in the channel list parameter.

When the parameter 'Return acquired data in one single value (range 0 - 255) 'is checked, the output size is 1 and the single value returned by the block represents the channel data in binary representation: one bit represents one channel value, the LSB being channel 0 and the MSB being channel 7. The output range is then 0 (all channels are 0) to 255 (all channels values are equal to 1).

Characteristics and Limitations

Connector Pin Assignments

The table below gives the connector pin assignments of the 100-pin I/O Connector of the PC-DIO-96 board. The pin names are formed from the PPI, port and channel numbers as follows: Pin-name= PPI(A,B,C,D) - Port(PA,PB,PC) - Channel number(0..7)
[For example: pin APC6refers to PPI A, Port C, channel 6]

100-pin I/O