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The Smart Water Meter is a kind of flow measuring meter used in homes, schools or industry for measuring water flow. It must include an ultra-low power microcontroller (MCU) to provide flow measurement, LCD display, RTC, data save, payment card, valve control, automatic remote meter reading through RS-485, M-Bus, Wireless communication, strong anti interference and excellent reliability. Due to the need to run at very low power and long time standby and powered by battery, the Nano110 series is suitable for Smart Water Meter applications.|
The Nano110 series provides high performance and low cost ultra-low power 32-bit ARM® Cortex™-M0 core, runs up to 42 MHz, and supports 32-bit hardware multiplier, low operating voltage 1.8V to 3.6V, Ultra-low power operating mode (<200uA/MHz), Power-down mode (RTC+LCD On, RAM retention <10uA and RTC,RAM retention < 2.5uA), Deep Power-down mode, RAM retention (< 1uA), Flash ROM up to 128 KB and RAM up to 16 KB, high integrated RTC, LCD, 12-bit ADC, 2 MSPS conversion rate, internal RC 12 MHz OSC, and ISO7816-3 interface for smart card to reduce system BOM cost, rich peripheral I²Cx2 ,SPIx3, UARTx5, input I/O 5V tolerance, Anti-theft lock code bit, 96-bit Unique ID and 128-bit Unique customer ID, and strong anti anti-jamming ability (ESD 8kV, EFT 4kV).