I'm wanting to run the 1284P directly from lithium (4.2V peak, 3.7V nominal) with a LDO 3V3 regulator (dropout ~3.4V). Page 325 of the Atmel datasheet ( http://www.atmel.com/Images/doc8059.pdf ) shows the speed grades for the chip. My first question is to ensure I understand the graph correctly. Since…

Atmega1284P @ 16MHz with 3.3V?

E40racer January 5, 2013, 9:35pm 9

I've run ATmega328's @ 16MHz @ 3.3V. One is connected to a nRF24L01 wireless module and a couple of I2C sensors. Have not had any issues.

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