Initialize OCR1A to FAN02_MIN_DUTY and add PWM documentation

src/main.c

@@ -35,7 +35,7 @@ int Init(void)
 	Info("Initializing...");
 
 	// The watchdog timer is clocked from a separate
-	// on-chip oscillator which runs at 1MHz. Eight
+	// on-chip oscillator which runs at 1 MHz. Eight
 	// different clock cycle periods can be selected
 	// to determine the reset period. If the reset
 	// period expires, the chip resets and executes