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MCU start up with an external oscillator

01/14/2016 | 12:54 AM

Question

Do any Silicon Labs 8-bit or 32-bit MCUs start up with an external oscillator?

Answer

No.

All of the 8-bit MCUs (p/n's: C8051* and EFM8*) start up with an internal oscillator.
The SiM3* line of 32-bit MCUs also start up with an internal oscillator.
The EFM32 line of 32-bit MCUs start up with an internal high frequency RC oscillator.

Firmware can switch the system clock to an external oscillator at the beginning of code execution.