1 SAMA5D2 Series Device Startup

The 12 MHz internal RC oscillator is used as the main clock source. The processor clock is set to 498 MHz, and the main system bus clock for peripherals is set to 164 MHz. The external 24 MHz crystal oscillator is used to provide an accurate clock for the USB device while running one of the two SAM-BA Monitors (standard or secure). The UART port (UART port used as a terminal console) is initialized to run at 115200 bauds, 8 bits of data, no parity and one stop bit, and the “RomBOOT” string is sent to the terminal console when the ROM code starts.