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Serial comm between two Sx chips — Parallax Forums

Serial comm between two Sx chips

bennettdanbennettdan Posts: 614
edited 2007-06-15 04:52 in General Discussion
I want to link two SX48 chips and then send data between the two. How do you connect the two together and resistors needed or do you just hook the pins together?

Comments

  • JonnyMacJonnyMac Posts: 9,214
    edited 2007-06-15 04:52
    If you want to use just one pin for bi-directional communications put a pull-up (4.7K) on one side and a 470 or 1K between the two; the series resistor will prevent a problem in the event one side is driven high while the other is driven low. Use OT (open true) serial comms, and don't forget to connect ground between the two boards.
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