Rainbow-electronics ATmega8515L Manuale Utente Scaricare il pdf (Pagina 41)

ATmega8515(L)

2512A–AVR–04/02

Port Pins When entering a sleep mode, all port pinsshould be configured to useminimumpower.

Themostimportant thing is to ensurethat no pinsdrive resistive loads. In sleep modes

wherethe I/Oclock (clk

I/O

) isstopped, theinput buffers of the device will be disabled.

This ensures that no power isconsumedbytheinput logicwhen not needed. In some

cases, theinput logic is neededfordetecting wake-upconditions, and it will then be

enabled.Refer to the section “DigitalInput EnableandSleepModes”onpage 60 for

details on which pins areenabled. If theinput buffer is enabled and theinput signal is

left floating orhave an analog signallevelclosetoV

/2, theinput bufferwill useexces-

sive power.

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Rainbow-electronics ATmega8515L Manuale Utente Pagina 41