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 outputs. The block OpPC-DIO-96Digital In must be used for programming the bits as inputs. 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

reset, pause and run: See the glossary definition.

When the parameter 'Specify multiple-channel data in one single value (range 0 - 255)' is not checked, the reset, pause and run inports must specify the individual channel values as vectors of values. The size of each of the three inports is the number of channels specified in the channel selection list.

When the parameter 'Specify multiple channel data in one single value (range0 - 255)' is checked, the size of each inport is 1 and the value applied to each of the inports 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 range of the input values is then 0 (all channels are 0) to 255 (all channels values are equal to 1).

Outputs

This block has no outputs.

Characteristics and Limitations

ConnectorPin 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 APC6 refers to PPI A, Port C, channel 6]

100-pin I/O