Flow meter reference design uses the world’s lowest-power MCU

By using ESI, it automates the measurement process and reduces CPU involvement, which helps to reduce power consumption of the MCU. In water meter designs, coupled to a LC rotation detection sensor, the ESI continuously detects the rotation of the propeller while the rest of the microcontroller is sleeping in low-power mode. This reference design demonstrates a usage example of the ESI to achieve ultra-low power consumption compared with the same detecting methodology using external circuit.