6 Replies Latest reply on Nov 26, 2014 9:53 PM by liumin

    Does 20732 chip need a external 32.768KHZ crystal?

      Does 20732 chip need a external 32.768 crystal? I had thought the 32.768KHZ crystal is used for advertising when chip in sleep mode, but it seems not, when I take out the crystal, it can still enter into sleep mode normally, then  what on earth this crystal used for?