I want to buy an Atmega1284p, doing a research on my local hardware seller (RS), I've found two models, the Atmega1284p-pu and the Atmega1284-pu. Reading the specs I don't see any difference (maybe I am missing something).
The only thing I saw is that Atmega1284-pu has the window to clear the memory using UV light. I really want to understand the difference, because one of them is cheaper and this will affect my criteria.
The p stands for picoPower. It uses less power than the normal chip.
Atmel picoPower devices can operate down to 1.62V while still maintaining all functionality, including analog functions. They have short wake-up time, with multiple wake-up sources and multiple sleep modes.
only thing I saw was a difference in hardware, the Atmega1284-pu have the window that allow to clear the memory using UV light.
I don't believe this is correct, although from the link you provided it does look that way. I think that company just uses that picture as a default picture, not an actual picture of the device.
There are a couple other options that Atmel uses when labeling their chips, you can read more about it in my post here.
The letter before the dash (-) is the Option Designator and means:
I can't post comments yet so this is not a answer to the question, but i just checked the datasheet and there at the end are about 20-30 pages for every model with characteristics. 1284 and 1284p have their own pages and plots, apart from model suffix and figures number there is not a single different bit anywhere i looked. Manually compared the datasheets and nowhere is mentioned about difference. Power supply voltages are identical everywhere and consumption and so on.
Is it possible that they simply didn't put correct information there, and just copy 1284 data?
