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The default state of the registers of the C8051F38x family places the device in the same operating state as the previous family. Therefore, the firmware from the C8051F34x will run on the C8051F38x devices unmodified. One example is the clock multiplier settings. In the previous family which used the clock multiplier to generate the 48 MHz, the multiplier had to be set up and stable. The MUX settings in the chip were then set to drive the 48 MHz to the system clock and the USB clock. In the C8051F38x family this same code can be used and the register settings will cause the 48 MHz internal oscillator to drive the nodes as the output of the clock multiplier did.
PTM Published on: 2011-06-01
Austria