3 Replies Latest reply on Sep 3, 2019 1:48 AM by ShipingW_81

    PSoC6 (CY8C6347LQI-BLD52)  Abnormal bluetooth voltage

    LonghuiW_96

      When debugging PSoC6 BLE, I encountered abnormal voltage between LDO and BUCK. The specific phenomena are as follows:

      Buck mode Testing Data:

      1. The normal voltage of VDD_NS and VDDD is 3.30v;

      2.VDCDC  is 1.94v;

      3. DVDD  is 1.58 V

      4. VCCBUCK1 is 1.69 V 

      5.VDDR1, VDDR2 and VDDR3 are 1.93v

      6. VDDR_HVL is 2.30 V.

      7. VCCD is 1.69 V

       

      LDO mode Testing Data:

      1. The normal voltage of VDD_NS and VDDD is 3.30v;

      2.VDCDC  is 1.99v;

      3. DVDD  is 1.58 V

      4. VCCBUCK1 is 1.63

      5.VDDR1, VDDR2 and VDDR3 are 1.83v

      6. VDDR_HVL is 2.28 V.

      7. VCCD is 1.66 V

       

       

      • The hardware circuit is as follows:
      • H1.png

             H2.png

       

       

             The software configuration is as followsNote: the code works well in the development version, but the MCU package is switched.)

                 S1.png