// Timer-Counter 1
// Control register A - phase-correct PWM, 8bit, clear when counting up
// COM1A1(1), COM1A0(0), COM1B1(1), COM1B0(0), FOC1A(0), FOC1B(0), WGM11(0), WGM10(1)
TCCR1A = 0b10100001;
// Control register B - prescaler = 8
// ICNC1(0), ICES1(0), 0, WGM13(0), WGM12(0), CS12(0), CS11(1), CS10(0)
TCCR1B = 0b00000010;