UART Communication between 2.8V and 1.8V

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aankur

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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
 

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
 

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