Using FPGA Pins to Implement Additional RS-232 Ports on the sbRIO-9651

Updated Apr 5, 2018

Reported In

Hardware

  • sbRIO-9651

Issue Details

I want to use 9651 to extent some RS-232 ports using FPGA. And how much ports most I can get?

Solution

The sbRIO-9651 SOM connector provides several banks of FPGA pins that you can configure for purposes specific to your application. In addition to FPGA Digital I/O (DIO), you can use these pins to implement the Additional RS-232 pots.
 
You can use any FPGA pins to implement additional RS-232 ports. NI 9651 supply three serial ports defined by sbRIO Component-level IP(CLIP) Generator, respectively Serial2, Serial3 and Serial4. The table below describes the Serial2, for example, pins and signals on the sbRIO-9651 SOM connector used to implement an additional RS-232 port on the reference carrier board.

 
Signal NamePin #DIO Signal on
Reference
Carrier Board
DirectionDescription
SERIAL2_TX66DIO_0OFull-modem RS-232
serial port signals.
SERIAL2_RX69DIO_7I
SERIAL2_RTS#74DIO_1O
SERIAL2_CTS#76DIO_6I
SERIAL2_DTR#59DIO_2O
SERIAL2_DSR#83DIO_4I
SERIAL2_DCD#75DIO_3I
SERIAL2_RI#68DIO_5I
 

Additional Information

The pin numbers listed in this table are the pins used on the reference carrier board. For your carrier board design, you can use the sbRIO CLIP Generator to configure these pins for any FPGA DIO.
 
I/O direction is with respect to the sbRIO-9651 SOM. I/O standards for these signals are defined in the sbRIO CLIP Generator.
 

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