Atmel mentions picoPower, but I don't see it defined anywhere. Can anyone tell me what this is?
"AVR4013: picoPower Basics"  takes the ATmega88PA as example. The parametric table  says it has picoPower. Its datasheet  also covers ATmega48A/PA/88A/PA/168A/PA/328/P. The Atmega88A doesn't have picoPower according to the parametric table. Yet, the typical power down current curves  are practically identical.
The "Supply Current of IO Modules"  are listed identical.
Searching the datasheet for 'pico' gives this: "Note: 1. BOD disable only available in picoPower devices ATmega48PA/88PA/168PA/328P" So, is this it? PicoPower is the ability to turn off BOD during sleep?
picopower.aspx  says:
"True 1.62V operation
Central to the AVR picoPower technology are carefully designed analog functions that continue to operate all the way down to 1.62V.
Atmel AVR microcontrollers offer true 1.62 V operation, including all analog modules, oscillators, and flash and EEPROM programming."
In the datasheet I don't see these 1.62 V, but 1.8 V:
"“ 0 - 4MHz@1.8 - 5.5V,
0 - 10MHz@2.7 - 5.5.V,
0 - 20MHz @ 4.5 - 5.5V
Common DC characteristics TA = -40Â°C to 85Â°C, VCC = 1.8V to 5.5V (unless otherwise noted)"
Why are they calling it picoPower anyways? The minimum current draw is about 100 nA at umm ... 1.62+ V - that's 162 nW.
Sections 30.3.4 and 30.4.4
Sections 30.3.3 and 30.4.3