Water meter reference design using LC sensor with Scan I/F

In battery-powered water meters, battery life over several years is key. One of the challenges is to continuously measure water flow information while using as little power as possible. The Scan I/F sensing peripheral integrated on the ultra-low power MSP430 microcontroller solves this problem. In the water meter design, the scan interface coupled to the LC rotation detection sensor continuously detects the rotation of the thruster while the rest of the microcontroller is in a low-power sleep mode. This reference design demonstrates how to use the scan interface to achieve ultra-low power consumption (versus the same detection method using external circuitry).

characteristic

• ● Supports the use of 2 LC sensors to detect rotational motion (including rotation direction)
• ● Ultra-low power consumption compared to external hardware solutions
• ● Provides sample source code for setting up the scanning interface
• ● Calibration example
• ● Convenient to install the sub-sensor board corresponding to the MSP-TS430PM64 target board