ARDUINO UNO VS MEGA PINOUT FULL

The 16U2 is programmed separately from the '328P, 2560, etc., because each part needs it's own Reset line.

I won't design in anything I can't buy from Digikey, Mouser, Arrow, etc. Distributors in the US do not carry them. Thanks.īig disadvantage - try and buy a CH340G. Unless of course another separate ISP is used to program the ATMEGA328P through its own ICSP port.?Īny and all knowledge, thoughts, and discussion would be appreciated. Since the MEGA16U2 is an MCU of it's own, can it be programmed to operate independently of the ATMEGA328P.? Such as for watchdog functions or some other purpose.? I'm assuming the MEGA16U2 has the typical Arduino ISP sketch loaded into it, so of course if the ATMEGA328P needs to be re-programmed afterwards, the MEGA16U2 would have to be re-programmed back to the ISP sketch first. Since the MEGA16U2 and ATMEGA328P both have there own ICSP headers, is there some purpose to this.? Is there some special use or handy tricks for using them.? What are the advantages and disadvantages of choosing either of these for a design.?

ARDUINO UNO VS MEGA PINOUT FULL

From studying these further, it seems the former is designed as a full ISP, and the latter is simply a USB-to-serial interface.

I see from studying my Uno, Mega, and Nano that two different USB interface chips are used: The MEGA16U2 AND CH340G. I'm doing my first design for my own custom Arduino circuit.

Arduino uno vs mega pinout