4.13 Microcontroller
The ATmega328 microcontroller circuit controls many aspects of this transceiver. Below is
this section of the transceiver circuit. Several points are worthy of discussion.
ATmega328P processor
The ATmega328P was chosen because it has enough processing power and I/O to handle
all the tasks required here. It is also common and inexpensive, and lots of QRP Labs
products already used it, bringing economies of scale in both the kit preparation and the
coding. The processor is operated at its maximum rated 20MHz system clock speed.
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