Difference between 328 and 328p

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Trying to see the difference between the two. Datasheet didn't seem to say anything that I could find. On digikey it seems to say that the P has 2 more ADC channels. Is this the only difference? And why is the P cheaper than the regular 328 then?

http://search.digikey.com/script...

http://search.digikey.com/script...

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P=picopower - look at the sleep and power saving functionality in the respective datasheets - I think you'll find the 328P offers more.

(and usually the two extra ADC is a difference in the number of pins on the device, nothing to do with whether it's P or not)

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Ah ok. But as far as extra pins go for ADC channels, both chips are 28 DIP, so I don't know how that works.

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Thats either a misprint or a misread.

--greg
Still learning, don't shout at me, educate me.
Starting the fire is easy; the hardest part is learning how to keep the flame!

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ltkenbo wrote:
On digikey it seems to say that the P has 2 more ADC channels.
I wouldn't trust any parametric information found on Digi-Key or any other supplier's website - too many humans are involved for it to be error free. When you want to know something specific about any part, AVR or otherwise, *always* study the manufacturer's datasheet. Of course, even those are known to have errors and omissions from time to time.

Don Kinzer
ZBasic Microcontrollers
http://www.zbasic.net

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Atmel website says 28 DIP for both of those chips:

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ltkenbo wrote:
Atmel website says 28 DIP for both of those chips.

But that's not the point. Even in the lowly ( ancient ) AtMega8 you have six ADC channels in the 28 DIP and eight channels in the 32-TQPF; it is the package, not the model that determines the number of ADC channels. Also, a parametric table, as dkinzer says - be it Atmel's site or other - will never be a suitable replacement for proper datasheets. None are above errors.

Martin Jay McKee

As with most things in engineering, the answer is an unabashed, "It depends."