SLAA913A January   2020  – June 2021

 

  1.   Trademarks
  2. 1Introduction
  3. 2System Overview
    1. 2.1 Software
    2. 2.2 Hardware
  4. 3System Operation
    1. 3.1 HDC2010 Sensor Readout
    2. 3.2 I2C Protocol and Data Buffering for Low Power
  5. 4Test and Verification
    1. 4.1 EnergyTrace™ Results
    2. 4.2 Average Current Consumption
    3. 4.3 Power-Saving Effect of Data Buffering in RAM
  6. 5Summary
  7. 6References
  8. 7Revision History

EnergyTrace™ Results

In this test both the sensor readout (HDC readout in automatic mode) and the RF packet transmit period are set to once per minute. The RF parameters are the default settings for 50 kbps, 2-GFSK in SmartRF Studio at +1 dBm. All these parameters are equal to the settings of the TIDA-00484 reference design to enable comparison between the different system solutions. Figure 4-1 shows the current profile, captured by the EnergyTrace function in CCS with a total transmit time of nearly 6.2 ms. The last 2.5 ms of this pulse with a stable current of approximately 9.4 mA shows the wireless data transmission by the CC1352P device (note that EnergyTrace reports relative measurement values, the CC1352P data sheet value is 9 mA).

GUID-67B8D84F-7D72-4DA4-9A18-D8C80A23E5D7-low.pngFigure 4-1 Current Profile for +1-dBm Transmit With SCE and Arm®Cortex®-M4F Activity