JAJU680A January 2019 – July 2022
The USS module in the MSP430FR6043 MCU used in this design is intended to meet the low-power requirements of gas meter applications. While the current consumption of the system depends on the meter, transducers, and configuration of the application, the solution was designed to consume approximately 2.5 µA, using 1-MHz transducers taking one measurement per second. This includes one UPS and one DNS measurement per second and the associated signal processing. This is only for the metrology portion and does not include any current consumption in between the measurements that can be used for other unrelated application-level processing or when the device can be put in a low-power mode like LPM3. For more details on power consumption measurements, see Section 3.2.2.6.
The low-power features implemented by this reference design include: