28

7593GS–AVR–03/08

AT90USB64/128

If the CPU core is in sleep and wakes-up from an asynchronous timer interrupt and then go

back in sleep mode again it may wake up several times.

Problem Fix/workaround

A s o ft wa r e wo r k ar o un d i s to w ai t wi t h pe r fo r mi n g th e s l ee p i n st r uc t io n u nt i l

TCNT2>OCR2+1.