ESP32 External Oscillators Required?
Posted: Thu Feb 17, 2022 11:49 pm
Are the 40 MHz external oscillator and the 32 kHz external oscillator required for a ESP32-D0WD-V3 design? The technical reference manual says that the CPU Clock source is defined by the RTC_CNTL_SOC_CLK_SEL field in the RTC_CNTL_CLK_CONF_REG register. The default value for this field is 0 on Reset and the field description states that a value of 0 means the clock source is set to the External Oscillator. Does this mean that a 40 MHz external oscillator is required?