//Fuses: 0xD920
//SPI Enable          (SPIEN = 0)
//External clock      (SKSEL3 = 0, SKSEL2 = 0, SKSEL1 = 0, SKSEL0 = 0)  
//Startup 6CK + 65 ms (SUT0 = 0)
//BOD enabled, 4.0V   (BODLEVEL = 0, BODEN = 0)
