TIDM-FLOWMETER-DUALRF, Flow Meter host MCU board with segment LCD and prepayment or dual RF option. Flow meters are becoming smarter and come with more and more communication options like low power RF or advanced options like prepayment. In addition, flow meter designs require ultra low power and in many cases in conjunction with a segment LCD driver. Typically for mid-end flow meter, the design can consist of one main HOST MCU carrying the metrology, application and communication software. The proposed design allows very quick implementation of a pre-payment function for flow meter application or any other ultra-low power application requiring segment LCD as well