MSP430FR604x(1), MSP430FR603x(1) Ultrasonic Sensing MSP430™ Microcontrollers for Water‑Metering Applications

1 Features

Best-in-class ultrasonic water-flow measurement with ultra-low power consumption
- <25-ps differential time-of-flight (dTOF) accuracy
- High-precision time measurement resolution of <5 ps
- Ability to detect low flow rates (<1 liter per hour)
- Approximately 3-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
Metering test interface (MTIF)
- Pulse generator and pulse counter
- Pulse rates up to 1016 pulses per second (p/s)
- Count capacity up to 65535 (16 bits)
- Operates in LPM3.5 with 200 nA (typical)
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 SVS specifications)
Optimized ultra-low-power modes
- Active mode: approximately 120 µA/MHz
- Standby mode with real-time clock (RTC) (LPM3.5): 450 nA
- 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 Tools and Software)
- 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
Device Comparison summarizes the available device variants and package options

SLASEB77493. The RTC is clocked by a 3.7-pF crystal.

2 Applications

3 Description

The Texas Instruments MSP430FR604x and MSP430FR603x family of ultrasonic sensing and measurement SoCs are powerful, highly integrated microcontrollers (MCUs) that are optimized for water and heat meters. The MSP430FR604x 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. MSP430FR604x and MSP430FR603x 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.

The USS module includes a programmable pulse generator (PPG) and a physical interface (PHY) with a low-impedance output driver for optimum sensor excitation and accurate impendence matching to deliver best results for zero-flow drift (ZFD). The module also includes a programmable gain amplifier (PGA) and a high-speed 12-bit 8-Msps sigma-delta ADC (SDHS) for accurate signal acquisition from industry-standard ultrasonic transducers.

Additionally, MSP430FR604x and MSP430FR603x MCUs integrate other peripherals to improve system integration for metering. The devices have a metering test interface (MTIF) module to implement pulse generation to indicate flow measured by the meter. The MSP430FR604x and MSP430FR603x MCUs also have an on-chip 8-mux LCD driver, an RTC, a 12-bit SAR ADC, an analog comparator, an advanced encryption accelerator (AES256), and a cyclic redundancy check (CRC) module.

MSP430FR604x and MSP430FR603x MCUs are supported by an extensive hardware and software ecosystem with reference designs and code examples to get your design started quickly. Development kits include the MSP‑TS430PZ100E 100-pin target development board and EVM430‑FR6047 ultrasonic water flow meter EVM. TI also provides free software including the ultrasonic sensing design center, ultrasonic sensing software library, and MSP430Ware™ software.

TI's MSP430 ultra-low-power (ULP) FRAM microcontroller platform combines uniquely embedded FRAM and a holistic ultra-low-power system architecture, letting system designers increase performance while lowering energy consumption. FRAM technology combines the low-energy fast writes, flexibility, and endurance of RAM with the nonvolatility of flash.

For complete module descriptions, see the MSP430FR58xx, MSP430FR59xx, and MSP430FR6xx Family User's Guide.

Device Information⁽¹⁾⁽²⁾

PART NUMBER	PACKAGE	BODY SIZE⁽³⁾
MSP430FR6047IPZ MSP430FR60471IPZ MSP430FR6045IPZ MSP430FR6037IPZ MSP430FR60371IPZ MSP430FR6035IPZ	LQFP (100)	14 mm × 14 mm

(1) For the most current part, package, and ordering information for all available devices, see the Package Option Addendum in Section 12, or see the TI website at www.ti.com.

(2) For a comparison of all available device variants, see Section 6.

(3) The sizes shown here are approximations. For the package dimensions with tolerances, see the Mechanical Data in Section 12.

4 Functional Block Diagrams

Figure 4-1 and Figure 4-2 show the functional block diagrams of the devices.

The device has 8KB of RAM, and 4KB of the RAM is shared with the LEA subsystem.

Figure 4-1 MSP430FR604x Functional Block Diagram

The device has 8KB of RAM, and 4KB of the RAM is shared with the LEA subsystem.

Figure 4-2 MSP430FR603x Functional Block Diagram

5 Revision History

Changes from revision C to revision D

Changes from September 26, 2018 to December 1, 2020

Updated the numbering format for tables, figures, and cross-references throughout the documentGo
Changed Section 6.1, Related Products Go
Added the note that begins "XT1CLK and VLOCLK can be active during LPM4..." Go
Added the INTERRUPT VECTOR REGISTER column, moved register names from the INTERRUPT FLAG column, and corrected interrupt flag names as necessary in Table 9-4, Interrupt Sources, Flags, Vectors, and Signatures Go
Corrected the interrupt flag bit numbers for I/O ports P4 to P9 (changed PxIFG.2 to PxIFG.7) in Table 9-4, Interrupt Sources, Flags, and Vectors Go
Corrected typo in "PySEL0.x" header row in Table 9-24, I/O Function Selection Go
Corrected the eUSCI module name (changed from eUSCI_A3 to eUSCI_A2) in the note "Direction controlled by eUSCI_A2 module" in Table 9-31, Port P5 (P5.0 to P5.7) Pin Functions Go
Corrected the address range for "Main: interrupt vectors" in Table 9-47, Memory Organization Go

Changes from revision B to revision C

Changes from December 16, 2017 to September 25, 2018

Updated Section 6.1, Related Products Go
Added note (1) to Section 8.13.1.2, SVS Go
Changed capacitor value from 4.7 µF to 470 nF in Figure 10-10, ADC12_B Grounding and Noise Considerations Go
Changed capacitor value from 4.7 µF to 470 nF in the last paragraph of Section 10.2.1.2, Design Requirements Go
Updated text and figure in Section 11.2, Device Nomenclature Go

Changes from revision A to revision B

Changes from September 26, 2017 to December 15, 2017

Changed document status to Production DataGo
Added Section 6.1, Related Products Go
Updated Section 8 Specifications with data for production siliconGo

Changes from initial release to revision A

Changes from June 2, 2017 to September 25, 2017

Changed maximum frequency to 2.5 MHz in the list item "Ability to directly interface standard ultrasonic sensors (Up to 2.5 MHz)" in Section 1, Features Go
Throughout document, removed mention of capacitive-touch capability on I/O pinsGo
Updated Section 8 Specifications Go

6 Device Comparison

Table 6-1 summarizes the available family members.

Table 6-1 Device Comparison

DEVICE⁽¹⁾⁽²⁾	FRAM (KB)	SRAM (KB)	CLOCK SYSTEM	LEA	USS USSXT	MTIF	ADC12_B (Channels)	Comp_E (Channels)	Timer_A⁽³⁾	Timer_B⁽⁴⁾	eUSCI_A⁽⁵⁾	eUSCI_B⁽⁶⁾	AES	BSL	I/Os	PACKAGE
MSP430FR6047	256	8	DCO HFXT LFXT	Yes	Yes	Yes	16 external, 2 internal	16	3, 3⁽⁷⁾ 2, 2,2⁽⁸⁾	7	4	2	Yes	UART	76	100 PZ (LQFP)
MSP430FR60471	256	8	DCO HFXT LFXT	Yes	Yes	Yes	16 external, 2 internal	16	3, 3⁽⁷⁾ 2, 2,2⁽⁸⁾	7	4	2	Yes	I²C	76	100 PZ (LQFP)
MSP430FR6037	256	8	DCO HFXT LFXT	Yes	No	Yes	16 external, 2 internal	16	3, 3⁽⁷⁾ 2, 2,2⁽⁸⁾	7	4	2	Yes	UART	76	100 PZ (LQFP)
MSP430FR60371	256	8	DCO HFXT LFXT	Yes	No	Yes	16 external, 2 internal	16	3, 3⁽⁷⁾ 2, 2,2⁽⁸⁾	7	4	2	Yes	I²C	76	100 PZ (LQFP)
MSP430FR6045	128	8	DCO HFXT LFXT	Yes	Yes	Yes	16 external, 2 internal	16	3, 3⁽⁷⁾ 2, 2,2⁽⁸⁾	7	4	2	Yes	UART	76	100 PZ (LQFP)
MSP430FR6035	128	8	DCO HFXT LFXT	Yes	No	Yes	16 external, 2 internal	16	3, 3⁽⁷⁾ 2, 2,2⁽⁸⁾	7	4	2	Yes	UART	76	100 PZ (LQFP)

(1) For the most current package and ordering information, see the Package Option Addendum in Section 12, or see the TI website at www.ti.com.

(2) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/packaging.

(3) Each number in the sequence represents an instantiation of Timer_A with its associated number of capture/compare registers and PWM output generators available. For example, a number sequence of 3, 5 would represent two instantiations of Timer_A, the first instantiation having three capture/compare registers and PWM output generators and the second instantiation having five capture/compare registers and PWM output generators, respectively.

(4) Each number in the sequence represents an instantiation of Timer_B with its associated number of capture/compare registers and PWM output generators available. For example, a number sequence of 3, 5 would represent two instantiations of Timer_B, the first instantiation having three capture/compare registers and PWM output generators and the second instantiation having five capture/compare registers and PWM output generators, respectively.

(5) eUSCI_A supports UART with automatic baud-rate detection, IrDA encode and decode, and SPI.

(6) eUSCI_B supports I²C with multiple slave addresses and SPI.

(7) Timers TA0 and TA1 provide internal and external capture/compare inputs and internal and external PWM outputs.

(8) Timers TA2 and TA3 provide only internal capture/compare inputs and only internal PWM outputs (if any) whereas Timer TA4 provides internal, external capture/compare inputs and internal, external PWM outputs.