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How do I daisy chain two X-NUCLEO-OUT14A1 expansion boards for communication?

1Answers
DeEmilia
12/17/2025, 08:40:30 AM

To daisy chain two X-NUCLEO-OUT14A1 industrial digital output expansion boards for communication, follow these hardware and software configuration steps:

Hardware Setup:

  1. On the first board (board #1), close jumpers J12 [1-2] and J13 [3-4].
  2. On the second board (board #2), close jumpers J12 [3-4] and J13 [1-2].
  3. Rework board #1: Remove resistor R105 and mount resistor R102.
  4. Rework board #2: Remove resistors R119, R108, R107, and R104. Then, mount resistors R102, R113, R111, and R109.

Software Configuration:

After completing the hardware setup, you must modify the software to enable daisy chain mode. Define the preprocessor directive USE_DAISY_CHAIN in your project. Also, remove the directive USE_PAR_IND, or change it to noUSE_PAR_IND. Finally, rebuild your project to generate a new binary file. The control mode changes will become active after rebuilding the binary files. This guidance is based on information from the X-NUCLEO-OUT14A1 Industrial Digital Output Expansion Board User Manual provided by STMicroelectronics.

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