+ Post New Thread
Results 1 to 2 of 2
  1. #1
    Newbie level 2
    Points: 899, Level: 6

    Join Date
    Jul 2014
    Posts
    4
    Helped
    0 / 0
    Points
    899
    Level
    6

    UART Communication between 2.8V and 1.8V

    I want to establish a UART communication between two modules. The Rx/Tx Voltage levels of the modules are 2.8V and 1.8V. Also, I have only 3.3V as the supply voltage on my board.

    Kindly guide me as to how can I perform this level shifting.



    Thanks

    •   AltAdvertisement

        
       

  2. #2
    Super Moderator
    Points: 77,106, Level: 67
    Achievements:
    7 years registered
    Awards:
    Most Frequent Poster 3rd Helpful Member

    Join Date
    Apr 2014
    Posts
    15,623
    Helped
    3560 / 3560
    Points
    77,106
    Level
    67

    Re: UART Communication between 2.8V and 1.8V

    Hi,

    this has been discussed many times. ... with varying voltage levels.

    First find out V_OL and V_OH of the sending device and V_IL and V_IH of the receiving device.
    Then do a search on "voltage level translation".

    In detail the solution depends on: input currents, data rate, wire length, cost, size ....

    Klaus
    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



--[[ ]]--