Forum: µC & Digital Electronics MOSI MISO or RX, TX, on Atmega328

von John (Guest)

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I was programming my Atmega328 via USB FTDI using TX and Rx till it 
spopped working. Traced the error down to the cable.
Only now I ask myself: What are  MOSI and MISO pins for?
When do I use TX RX, and when should I use MOSI and MISO?
Appreciate any help


von Andreas S. (andreas) (Admin) Flattr this

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RX/TX belongs to the UART, which is used for general purpose serial 
communications. To use it for programming, your AVR apparently has a 
bootloader installed, which is a small piece of software that receives 
the program and writes it to the Flash ROM. But in general, the AVR 
programming interface uses MOSI/MISO/SCK/RST.


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