TI MSP430FR6047IPZR

The MSP430FR604x and MSP430FR603x series of ultrasonic sensing and measurement SoCs are powerful and highly integrated microcontrollers (MCUs) optimized for water meters and heat meters. The MSP430FR604x MCU features an integrated Ultrasonic Sensing Solution (USS) module that provides high accuracy under various flow rate conditions. The USS module is highly integrated and requires very few external components, which helps achieve ultra-low-power metering and reduces system cost.

The MSP430FR604x and MSP430FR603x MCUs incorporate an integrated Low-power Accelerator (LEA) to enable high-speed ADC-based signal acquisition and subsequent optimized digital signal processing, offering an ideal ultra-low-power, high-accuracy metering solution for battery-powered metering applications.

The USS module includes a Programmable Pulse Generator (PPG) and a Physical Interface (PHY) with a low-impedance output driver to achieve optimal sensor excitation and accurate impedance matching, thus achieving the best results in terms of Zero Flow Drift (ZFD). The module also includes a Programmable Gain Amplifier (PGA) and a high-speed 12-bit 8Msps Σ-Δ ADC (SDHS) to facilitate accurate signal acquisition through industry-standard ultrasonic sensors.

In addition, the MSP430FR604x and MSP430FR603x MCUs integrate other peripherals to improve the system's metering integration. These devices also feature a Metering Test Interface (MTIF) module that can indicate the flow rate measured by the meter through pulse generation.

The MSP430FR604x and MSP430FR603x MCUs also feature an on-chip 8-channel multiplexed LCD driver, RTC, 12-bit SAR ADC, analog comparator, Advanced Encryption Accelerator (AES256), and Cyclic Redundancy Check (CRC) module.

The MSP430FR604x and MSP430FR603x MCUs are supported by a wide range of hardware and software ecosystems, including reference designs and code examples to help users quickly start their designs. The development kits include the MSP-TS430PZ100E 100-pin target development board and the EVM430-FR6047 ultrasonic water flow meter EVM. Free software is also available, including the Ultrasonic Sensing Design Center, the Ultrasonic Sensing Software Library, and MSP430Ware™ software.

The MSP430 Ultra-Low-Power (ULP) FRAM microcontroller platform combines unique embedded FRAM with a comprehensive ultra-low-power system architecture, enabling system designers to improve performance while reducing energy consumption. FRAM technology combines the low-energy, fast write, flexibility, and durability of RAM with the non-volatility of flash memory.

• Best-in-class ultrasonic water flow measurement with ultra-low power consumption
• Differential Time-of-Flight (dTOF) accuracy < 25ps
• High-precision time measurement resolution < 5ps
• Capable of detecting low flow rates (< 1 liter/hour)
• Total current consumption ~3µA at 1 measurement per second
• Meets and exceeds ISO 4064, OIML R49, and EN 1434 accuracy standards
• Direct interface with standard ultrasonic transducers (up to 2.5MHz)
• Integrated analog front end
• Ultrasonic Sensing Solution (USS)
• Programmable Pulse Generation (PPG) for pulse generation at different frequencies
• Integrated Physical Interface (PHY) with low-impedance (4Ω) output driver for input/output channel control
• High-performance 12-bit Σ-Δ ADC (SDHS) with output data rate up to 8Msps
• Programmable Gain Amplifier (PGA) with –6.5dB to 30.8dB gain
• High-performance PLL with output range 68MHz to 80MHz
• Metrology Test Interface (MTIF)
• Pulse generator and pulse counter
• Pulse rate up to 1016 pulses/second (p/s)
• Count capacity up to 65535 (16-bit)
• 200nA (typical) operation in LPM3.5
• Low Energy Accelerator (LEA)
• Operates independently of CPU
• Shares 4KB RAM with CPU
• 256-point efficient complex FFT: up to 40× faster than Arm® Cortex®-M0+ core
• Embedded microcontroller
• 16-bit RISC architecture with clock frequency up to 16MHz
• Wide supply voltage range: 3.6V to 1.8V (minimum supply voltage limited by SVS level; see SVS specifications)
• Optimized ultra-low-power active mode operation: ~120µA/MHz
• RTC in standby mode (LPM3.5): 450nA
• Shutdown current (LPM4.5): 30nA
• Ferroelectric RAM (FRAM)
• Non-volatile memory up to 256KB
• Ultra-low-power write
• Fast write: 125ns per word (64KB written in 4ms)
• Unified memory = program + data + storage in a single address space
• 10¹⁵ write cycle endurance
• Radiation-tolerant and non-magnetic
• Smart digital peripherals
• 32-bit hardware multiplier (MPY)
• 6-channel internal DMA
• RTC with calendar and alarm functions
• Six 16-bit timers, each with up to seven capture/compare registers
• 32-bit and 16-bit CRC
• High-performance analog
• 16-channel analog comparator
• 12-bit SAR ADC with window comparator, internal reference, sample-and-hold, and up to 16 external input channels
• Integrated LCD driver with contrast control up to 264 segments
• Versatile I/O ports
• Per-bit, per-byte, and per-word access (paired access)
• Edge-selectable wake-up from LPM on all ports
• Programmable pull-up and pull-down on all ports
• Code security and encryption
• 128-bit or 256-bit AES security encryption/decryption coprocessor
• Random number seed for random number generation algorithms
• IP encapsulation preventing external memory access
• FRAM provides inherent security advantages
• Enhanced serial communication
• Up to four eUSCI_A serial communication ports
• UART with automatic baud rate detection
• IrDA encoding and decoding
• Up to two eUSCI_B serial communication ports
• I2C hardware with multi-slave addressing
• UART or I2C Bootloader (BSL)
• Flexible clock system
• Fixed-frequency DCO with 10 selectable factory-trimmed frequencies
• Low-power low-frequency internal clock source (VLO)
• 32kHz crystal oscillator (LFXT)
• High-frequency crystal oscillator (HFXT)
• Development tools and software
• Ultrasonic Sensing Design Center GUI
• Ultrasonic Sensing software library
• EVM430-FR6047 water meter evaluation module board
• MSP-TS430PZ100E target socket board for 100-pin package
• Free professional development environment with EnergyTrace++ technology
• MSP430Ware™ for MSP430™ microcontrollers

• Ultrasonic smart water meter
• Ultrasonic smart heat meter
• Liquid level sensing
• Water leak detection