NI 9403 (FPGA Interface)

CompactRIO 32-Channel, TTL Digital Input/Output Module

FPGA I/O Node

You can use an FPGA I/O Node, configured for reading and writing, with this device.

Terminals in Software

Use the FPGA I/O Node to access the following terminals for this device.

Terminal	Description
DIOx	Digital input/output channel x, where x is the number of the channel. The NI 9403 has DIO channels 0 to 31.
DIO7:0	Digital port consisting of channels 0 through 7. Channel 7 is returned in the MSB, and channel 0 is returned in the LSB.
DIO15:8	Digital port consisting of channels 8 through 15. Channel 15 is returned in the MSB, and channel 8 is returned in the LSB.
DIO23:16	Digital port consisting of channels 16 through 23. Channel 23 is returned in the MSB, and channel 16 is returned in the LSB.
DIO31:24	Digital port consisting of channels 24 through 31. Channel 31 is returned in the MSB, and channel 24 is returned in the LSB.
DIO31:0	Digital port consisting of channels 0 through 31. Channel 31 is returned in the MSB, and channel 0 is returned in the LSB.

Arbitration

This device supports only the Arbitrate if Multiple Requestors Only and Never Arbitrate options for arbitration. The default arbitration setting is Arbitrate if Multiple Requestors Only.

If you are sure that the design of the FPGA VI will never allow more than one digital function to execute at the same time, even on different channels, you can place a checkmark in the Disable Arbitration checkbox on the C Series Module Properties dialog box to disable arbitration and reduce the amount of FPGA logic used by VIs. If more than one digital function could execute simultaneously in the FPGA VI, leave the box unchecked.

I/O Methods

Use the FPGA I/O Method Node to access the following method for this device. This device does not support any module methods.

Method	Description
Set Output Enable	Sets the line direction of the digital channel or port. If the I/O item is a digital line, Enable requires a Boolean data type. If the I/O item is a digital port, Enable requires a numeric data type.

Module Properties

Use the FPGA I/O Property Node to access the following properties for this device. This device does not support any I/O properties.

Property	Description
Module ID	Returns the module ID.
Serial Number	Returns the unique serial number of the module.
Vendor ID	Returns the National Instruments vendor ID, 0x1093.

Single-Cycle Timed Loop

This device does not support the single-cycle Timed Loop.

Hardware Documentation

Refer to the NI 9403 Operating Instructions and Specifications to learn about module specifications and how to use the module. Refer to the CompactRIO Related Documentation for further information about CompactRIO documentation.