The Texas Instruments MSP430FR600x family of ultrasonic sensing and measurement SoCs are powerful, highly integrated microcontrollers (MCUs) that are optimized for water and heat meters. The MSP430FR600x MCUs offer an integrated ultrasonic sensing solution (USS) module, which provides high accuracy for a wide range of flow rates. The USS module helps achieve ultra-low-power metering combined with lower system cost due to maximum integration requiring very few external components. MSP430FR600x MCUs implement a high-speed ADC-based signal acquisition followed by optimized digital signal processing using the integrated low-energy accelerator (LEA) module to deliver a high-accuracy metering solution with ultra-low power optimum for battery-powered metering applications.

Features :

Best-in-class ultrasonic water-flow measurement with ultra-low power consumption
- <100-ps differential time-of-flight (dTOF) accuracy
- High-precision time measurement resolution of 20ps
- Ability to detect low flow rates (4~6 liter per hour)
- Approximately 4-µA overall current consumption with one measurement per second
Compliant to and exceeds ISO 4064, OIML R49, and EN 1434 accuracy standards
Ability to directly interface standard ultrasonic sensors (up to 2.5 MHz)
Integrated analog front end – ultrasonic sensing solution (USS)
- Programmable pulse generation (PPG) to generate pulses at different frequencies
- Integrated physical interface (PHY) with low-impedance (4-Ω) output driver to control input and output channels
- High-performance high-speed 12-bit sigma-delta ADC (SDHS) with output data rates up to 8 Msps
- Programmable gain amplifier (PGA) with –6.5 dB to 30.8 dB
- High-performance phase-locked loop (PLL) with output range of 68 MHz to 80 MHz
Low-energy accelerator (LEA)
- Operation independent of CPU
- 4KB of RAM shared with CPU
- Efficient 256-point complex FFT: Up to 40× faster than Arm Cortex-M0+ core
Embedded microcontroller
- 16-bit RISC architecture up to 16‑MHz clock
- Wide supply voltage range from 3.6 V down to 1.8 V (minimum supply voltage is restricted by SVS levels, see the Section 8.13.1.2)
Optimized ultra-low-power modes
- Active mode: approximately 120 µA/MHz
- Standby mode with real-time clock (RTC) (LPM3.5): 450 nA ⁽¹⁾
- Shutdown (LPM4.5): 30 nA
Ferroelectric random access memory (FRAM)
- Up to 256KB of nonvolatile memory
- Ultra-low-power writes
- Fast write at 125 ns per word (64KB in 4 ms)
- Unified memory = program + data + storage in one space
- 10¹⁵ write cycle endurance
- Radiation resistant and nonmagnetic
Intelligent digital peripherals
- 32-bit hardware multiplier (MPY)
- 6-channel internal DMA
- RTC with calendar and alarm functions
- Six 16-bit timers with up to seven capture/compare registers each
- 32-bit and 16-bit cyclic redundancy check (CRC)
High-performance analog
- 16-channel analog comparator
- 12-bit SAR ADC featuring window comparator, internal reference, and sample-and-hold, up to 16 external input channels
- Integrated LCD driver with contrast control for up to 264 segments
Multifunction input/output ports
- Accessible bit-, byte-, and word-wise (in pairs)
- Edge-selectable wake from LPM on all ports
- Programmable pullup and pulldown on all ports
Code security and encryption
- 128- or 256-bit AES security encryption and decryption coprocessor
- Random number seed for random number generation algorithms
- IP encapsulation protects memory from external access
- FRAM provides inherent security advantages
Enhanced serial communication
- Up to four eUSCI_A serial communication ports
  - UART with automatic baud-rate detection
  - IrDA encode and decode
- Up to two eUSCI_B serial communication ports
  - I²C with multiple-slave addressing
- Hardware 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)
- 32-kHz crystals (LFXT)
- High-frequency crystals (HFXT)
Development tools and software (also see Section 11.3)
- Ultrasonic Sensing Design Center graphical user interface
- Ultrasonic sensing software library
- EVM430-FR6047 water meter evaluation module
- MSP-TS430PZ100E target socket board for 100-pin package
- Free professional development environments with EnergyTrace++ technology
- MSP430Ware™ for MSP430™ microcontrollers