Go Down

Topic: ATmega328P  -  New from Atmel (Read 2186 times) previous topic - next topic

gnu_linux

I have 7 ATmega168s and all of them are ATmega168-20PUs but they run at 16MHz due to the external oscillator

I would like to run them at 20MHz

Besides the 20MHz versions there are also 4, 10, 12 and 16MHz versions of the ATmega

The Xmega can do 32MHz

:)

kg4wsv

Quote
The Xmega can do 32MHz

The Xmega is still vaporware, isn't it?

-j


gnu_linux

Not quite sure, it's showing as being "on order"

:)

westfw

Quote
I would like to run them at 20MHz

Why?

gnu_linux

To get 4 more MIPS out of it :)

I am not looking to overclock the parts, just run them at 20MHz as spec'ed instead of 16MHz

:)


ericski

I think the guys over at DIY Drones would like to get the extra processing power from that 4MHz.

gnu_linux

#21
Oct 28, 2008, 05:40 pm Last Edit: Oct 28, 2008, 05:43 pm by gnu_linux Reason: 1
As ericski mentioned, on some projects like that every single MHz and MIPS counts :)

On other projects if you're trying to conserve power and dissipate less heat, use lower power supply voltages, and so on, sometimes underclocking the chip is desirable

:)

gnu_linux

If you want to run the ATmega 48V / 88V / 168V at 4MHz you can run it at as low as 1.8V

At 10MHz you need to run it at 2.7 - 5.5V

At 20MHz you have to run it at 4.5 - 5.5V

This is on page 306 of the datasheet

:)

Go Up