Water Meter Reference Design for two LC Sensors, Using Extended Scan Interface (ESI)

(ACTIVE) TIDM-LC-WATERMTR

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Key Document

Description

One of the challenges in battery operated water meters is to continuously measure the water flow information while consuming as little energy as possible. The EVM430-FR6989 used in this design features a MSP430 FRAM-based microcontroller with 100uA/MHz active-mode current, 450nA standby-mode current with the real-time clock enabled, and integrated low-power analog and digital peripherals. Additionally, the MCU offers for near infinite write endurance, quick/low-power writes, and data flexibility. This reference design demonstrates a usage example of the integrated Extended Scan Interface (ESI) on the microcontroller to achieve ultra-low power consumption compared with the same detecting methodology using an external circuit. In water meter designs, coupled to LC rotation detection sensor (provided), the ESI is continuously detecting the rotation of the propeller while the rest of the microcontroller is in a low-power mode. By using the ESI integrated in the MSP430 MCU, this design automates the measurement process and reduces CPU involvement, which helps to reduce overall power consumption.

To purchase the kit, please see the EVM430-FR6989 page.

Features
  • Supports 2 LC sensors for detecting rotation movement including rotating direction
  • Ultra-low power consumption compared with external hardware solution
  • GUI for setting up and calibrating the ESI
  • Easy to install daughter sensor board for MCU target board
  • Motor control board with variable speed to simulate flow using metal plate
  • RF socket available to enable Low Power RF extension (Sub 1GHz or 2.4GHz ZigBee)

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  




TI Devices (4)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
MSP430F5528  16-Bit Ultra-Low-Power Microcontroller, 128KB Flash, 8KB RAM, USB, 12Bit ADC, 2 USCIs, 32Bit HW MPY  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
MSP430FR6989  MSP430FR6989 16 MHz ULP Microcontroller - 128 KB FRAM, 2KB SRAM, 83 IO, ADC12, LCD, AES, Scan IF  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
TPD2E001  Low-Capacitance 2-Channel +/-15kV ESD Protection Array for High-Speed Data Interfaces  Circuit Protection  Sample & Buy View Design Kits & Evaluation Modules
TUSB2046B  4-Port USB 2.0 12 Mbps USB Full-Speed Hub  USB  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

Application notes (2)
Title Abstract Type Size (KB) Date Views
PDF 374 28 Aug 2014 389
PDF 2171 28 Aug 2014 711
User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 3054 25 Aug 2014 383
Design files (5)
Title Abstract Type Size (KB) Date Views
ZIP 562 25 Aug 2014 237
ZIP 318 25 Aug 2014 52
ZIP 874 25 Aug 2014 81
PDF 138 25 Aug 2014 80
ZIP 228 25 Aug 2014 44
Related Tools & Software

Software (1)



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