ESP-WROOM-02U-N4E and ESP-WROOM-02D use a 26-MHz crystal oscillator. The accuracy of the crystal oscillator should be ±10 PPM. When using the download tool, please select the right type of crystal oscillator. In circuit design, capacitors C1 and C2 which connect to the earth are added to the input and output terminals of the crystal oscillator respectively. The values of the two capacitors can be flexible, ranging from 6 pF to 22 pF, however, the specific capacitive values depend on further testing of, and adjustment to, the overall performance of the whole circuit. Normally, the capacitive values of C1 and C2 are within 10 pF for the 26-MHz crystal oscillator. |ESP-WROOM-02U-N4 |ESP-WROOM-02U-N4 datasheet|ESP-WROOM-02U-N4 Espressif Systems|Espressif Systems distributor in india|Espressif Systems distributor in mumbai|Espressif Systems distributor near me|

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