ATmega16 Cheat Sheet (DRAFT) by mathias

setting some bits	PORTD |= (1 << PD1) | (1 << PD2)
clearing some bits	PORTD &= ~((1 << PD1) | (1 << PD2))
toggling some bits	PORTD ^= (1 << PD1) | (1 << PD2)
checking a Bit	PORTD & ((1 << PD1) | (1 << PD2))

16 bit Timer/­Counter
Timer/­Cou­nter1 Control Register A	TCCR1A
Timer/­Cou­nter1 Control Register B	TCCR1B
Timer/­Cou­nter1	TCNT1
Output Compare Register 1 A	OCR1A
Output Compare Register 1 B	OCR1B
Input Capture Register 1	ICR1
Timer/­Counter Interrupt Mask Register	TIMSK