Multiple Serial Communication on Avr Mcu

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Multiple Serial Communication on Avr Mcu

March 25th, 2010 nashrul Leave a comment Go to comments

Multiple Serial Communication on Avr Mcu??????????

This question comes up from time to time, and I want to give a simple solution in this problem.

My friend needs MCU with 4 UART (@ 38.4 KBaud each respectively) to their robot projects in Battle Division KRCI (Kontes Robot Cerdas Indonesia) 2010. 4 UART is a problem, because the simplest MCUs (AVR, PIC) do not have
chips with this number.

I have a suggestion, which can be seen in this picture, by using an IC CD4052 is a Dual 4-Channel Analog Multiplexer/Demultiplexer are Digitally controlled analog switches having low “ON” impedance and very low “OFF” leakage currents. that can be used to select the desired channel by giving logic select on pins A and B.

This option which I would recommend in terms of simplicity implementation? Cost less than a concern here, and no specific performance requirements.

Datasheet C4052 can be download in this Link (PDF) and this Link (ZIP).

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