MSP430FR2311

ACTIVE

16-MHz integrated analog microcontroller with 3.75-KB FRAM, OpAmp, TIA, comparator w/DAC, 10-bit ADC

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MSPM0L1306 ACTIVE 32-MHz Arm® Cortex®-M0+ MCU with 64-KB flash, 4-KB SRAM, 12-bit ADC, comparator, OPA 32-bit ARM Cortex-M0+ MCU for cost optimized designs
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MSP430FR2311

ACTIVE

Product details

CPU MSP430 Frequency (MHz) 16 Flash memory (kByte) 4 RAM (kByte) 1 ADC type 10-bit SAR Features OpAmp, Real-time clock, Transimpedance amplifier UART 1 Number of ADC channels 8 SPI 2 USB No Hardware accelerators 0 Operating temperature range (°C) -40 to 85 Rating Catalog Communication interface I2C, SPI, UART Operating system BareMetal (No OS), TI RTOS Nonvolatile memory (kByte) 4 Number of GPIOs 16 Number of I2Cs 1 Security Secure debug
CPU MSP430 Frequency (MHz) 16 Flash memory (kByte) 4 RAM (kByte) 1 ADC type 10-bit SAR Features OpAmp, Real-time clock, Transimpedance amplifier UART 1 Number of ADC channels 8 SPI 2 USB No Hardware accelerators 0 Operating temperature range (°C) -40 to 85 Rating Catalog Communication interface I2C, SPI, UART Operating system BareMetal (No OS), TI RTOS Nonvolatile memory (kByte) 4 Number of GPIOs 16 Number of I2Cs 1 Security Secure debug
TSSOP (PW) 20 41.6 mm² 6.5 x 6.4 TSSOP (PW) 16 32 mm² 5 x 6.4 VQFN (RGY) 16 14 mm² 4 x 3.5
  • Embedded microcontroller
    • 16-bit RISC architecture up to 16 MHz
    • 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 low-power modes (at 3 V)
    • Active mode: 126 µA/MHz
    • Standby: real-time clock (RTC) counter (LPM3.5 with 32768-Hz crystal): 0.71 µA
    • Shutdown (LPM4.5): 32 nA without SVS
  • High-performance analog
    • Transimpedance amplifier (TIA) (1)
      • Current-to-voltage conversion
      • Half-rail input
      • Low-leakage negative input down to 5 pA, enabled on TSSOP16 package only
      • Rail-to-rail output
      • Multiple input selections
      • Configurable high-power and low-power modes
    • 8-channel 10-bit analog-to-digital converter (ADC)
      • Internal 1.5-V reference
      • Sample-and-hold 200 ksps
    • Enhanced comparator (eCOMP)
      • Integrated 6-bit digital-to-analog converter (DAC) as reference voltage
      • Programmable hysteresis
      • Configurable high-power and low-power modes
    • Smart analog combo (SAC-L1)
      • Supports general-purpose op amp
      • Rail-to-rail input and output
      • Multiple input selections
      • Configurable high-power and low-power modes
  • Low-power ferroelectric RAM (FRAM)
    • Up to 3.75KB of nonvolatile memory
    • Built-in error correction code (ECC)
    • Configurable write protection
    • Unified memory of program, constants, and storage
    • 1015 write cycle endurance
    • Radiation resistant and nonmagnetic
  • Intelligent digital peripherals
    • IR modulation logic
    • Two 16-bit timers with three capture/compare registers each (Timer_B3)
    • One 16-bit counter-only RTC counter
    • 16-bit cyclic redundancy checker (CRC)
  • Enhanced serial communications
    • Enhanced USCI A (eUSCI_A) supports UART, IrDA, and SPI
    • Enhanced USCI B (eUSCI_B) supports SPI and I2C with support for remap feature (see Signal Descriptions)
  • Clock system (CS)
    • On-chip 32-kHz RC oscillator (REFO)
    • On-chip 16-MHz digitally controlled oscillator (DCO) with frequency locked loop (FLL)
      • ±1% accuracy with on-chip reference at room temperature
    • On-chip very low-frequency 10-kHz oscillator (VLO)
    • On-chip high-frequency modulation oscillator (MODOSC)
    • External 32-kHz crystal oscillator (LFXT)
    • External high-frequency crystal oscillator up to 16 MHz (HFXT)
    • Programmable MCLK prescalar of 1 to 128
    • SMCLK derived from MCLK with programmable prescalar of 1, 2, 4, or 8
  • General input/output and pin functionality
    • 16 I/Os on 20-pin package
    • 12 interrupt pins (8 pins of P1 and 4 pins of P2) can wake MCU from LPMs
    • All I/Os are capacitive touch I/Os
  • Development tools and software
  • Family members (also see Device Comparison)
    • MSP430FR2311: 3.75KB of program FRAM and 1KB of RAM
    • MSP430FR2310: 2KB of program FRAM and 1KB of RAM
  • Package options
    • 20-pin TSSOP (PW20)
    • 16-pin TSSOP (PW16)
    • 16-pin VQFN (RGY16)

(1)The transimpedance amplifier was originally given an abbreviation of TRI in descriptive text, pin names, and register names. The abbreviation has changed to TIA in all descriptive text, but pin names and register names still use TRI.

  • Embedded microcontroller
    • 16-bit RISC architecture up to 16 MHz
    • 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 low-power modes (at 3 V)
    • Active mode: 126 µA/MHz
    • Standby: real-time clock (RTC) counter (LPM3.5 with 32768-Hz crystal): 0.71 µA
    • Shutdown (LPM4.5): 32 nA without SVS
  • High-performance analog
    • Transimpedance amplifier (TIA) (1)
      • Current-to-voltage conversion
      • Half-rail input
      • Low-leakage negative input down to 5 pA, enabled on TSSOP16 package only
      • Rail-to-rail output
      • Multiple input selections
      • Configurable high-power and low-power modes
    • 8-channel 10-bit analog-to-digital converter (ADC)
      • Internal 1.5-V reference
      • Sample-and-hold 200 ksps
    • Enhanced comparator (eCOMP)
      • Integrated 6-bit digital-to-analog converter (DAC) as reference voltage
      • Programmable hysteresis
      • Configurable high-power and low-power modes
    • Smart analog combo (SAC-L1)
      • Supports general-purpose op amp
      • Rail-to-rail input and output
      • Multiple input selections
      • Configurable high-power and low-power modes
  • Low-power ferroelectric RAM (FRAM)
    • Up to 3.75KB of nonvolatile memory
    • Built-in error correction code (ECC)
    • Configurable write protection
    • Unified memory of program, constants, and storage
    • 1015 write cycle endurance
    • Radiation resistant and nonmagnetic
  • Intelligent digital peripherals
    • IR modulation logic
    • Two 16-bit timers with three capture/compare registers each (Timer_B3)
    • One 16-bit counter-only RTC counter
    • 16-bit cyclic redundancy checker (CRC)
  • Enhanced serial communications
    • Enhanced USCI A (eUSCI_A) supports UART, IrDA, and SPI
    • Enhanced USCI B (eUSCI_B) supports SPI and I2C with support for remap feature (see Signal Descriptions)
  • Clock system (CS)
    • On-chip 32-kHz RC oscillator (REFO)
    • On-chip 16-MHz digitally controlled oscillator (DCO) with frequency locked loop (FLL)
      • ±1% accuracy with on-chip reference at room temperature
    • On-chip very low-frequency 10-kHz oscillator (VLO)
    • On-chip high-frequency modulation oscillator (MODOSC)
    • External 32-kHz crystal oscillator (LFXT)
    • External high-frequency crystal oscillator up to 16 MHz (HFXT)
    • Programmable MCLK prescalar of 1 to 128
    • SMCLK derived from MCLK with programmable prescalar of 1, 2, 4, or 8
  • General input/output and pin functionality
    • 16 I/Os on 20-pin package
    • 12 interrupt pins (8 pins of P1 and 4 pins of P2) can wake MCU from LPMs
    • All I/Os are capacitive touch I/Os
  • Development tools and software
  • Family members (also see Device Comparison)
    • MSP430FR2311: 3.75KB of program FRAM and 1KB of RAM
    • MSP430FR2310: 2KB of program FRAM and 1KB of RAM
  • Package options
    • 20-pin TSSOP (PW20)
    • 16-pin TSSOP (PW16)
    • 16-pin VQFN (RGY16)

(1)The transimpedance amplifier was originally given an abbreviation of TRI in descriptive text, pin names, and register names. The abbreviation has changed to TIA in all descriptive text, but pin names and register names still use TRI.

The MSP430FR231x FRAM microcontrollers (MCUs) are part of the MSP430™ MCU value line sensing family. The devices integrate a configurable low-leakage transimpedance amplifier (TIA) and a general purpose operational amplifier. The MCUs feature a powerful 16-bit RISC CPU, 16-bit registers, and a constant generator that contribute to maximum code efficiency. The digitally controlled oscillator (DCO) also allows the device to wake up from low-power modes to active mode typically in less than 10 µs. The feature set of these MCUs are well suited for applications ranging from smoke detectors to portable health and fitness accessories.

The ultra-low-power MSP430FR231x MCU family consists of several devices that feature embedded nonvolatile FRAM and different sets of peripherals targeted for various sensing and measurement applications. The architecture, FRAM, and peripherals, combined with extensive low-power modes, are optimized to achieve extended battery life in portable and wireless sensing applications. FRAM is a nonvolatile memory technology that combines the speed, flexibility, and endurance of SRAM with the stability and reliability of flash at lower total power consumption.

The MSP430FR231x 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‑EXP430FR2311 LaunchPad™ development kit and the MSP‑TS430PW20 20-pin target development board. TI provides free MSP430Ware™ software, which is available as a component of Code Composer Studio™ IDE desktop and cloud versions within TI Resource Explorer. The MSP430 MCUs are also supported by extensive online collateral, training, and online support through the E2E™ Community Forum.

For complete module descriptions, see the MSP430FR4xx and MSP430FR2xx Family User’s Guide.

The MSP430FR231x FRAM microcontrollers (MCUs) are part of the MSP430™ MCU value line sensing family. The devices integrate a configurable low-leakage transimpedance amplifier (TIA) and a general purpose operational amplifier. The MCUs feature a powerful 16-bit RISC CPU, 16-bit registers, and a constant generator that contribute to maximum code efficiency. The digitally controlled oscillator (DCO) also allows the device to wake up from low-power modes to active mode typically in less than 10 µs. The feature set of these MCUs are well suited for applications ranging from smoke detectors to portable health and fitness accessories.

The ultra-low-power MSP430FR231x MCU family consists of several devices that feature embedded nonvolatile FRAM and different sets of peripherals targeted for various sensing and measurement applications. The architecture, FRAM, and peripherals, combined with extensive low-power modes, are optimized to achieve extended battery life in portable and wireless sensing applications. FRAM is a nonvolatile memory technology that combines the speed, flexibility, and endurance of SRAM with the stability and reliability of flash at lower total power consumption.

The MSP430FR231x 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‑EXP430FR2311 LaunchPad™ development kit and the MSP‑TS430PW20 20-pin target development board. TI provides free MSP430Ware™ software, which is available as a component of Code Composer Studio™ IDE desktop and cloud versions within TI Resource Explorer. The MSP430 MCUs are also supported by extensive online collateral, training, and online support through the E2E™ Community Forum.

For complete module descriptions, see the MSP430FR4xx and MSP430FR2xx Family User’s Guide.

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More information

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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet MSP430FR231x Mixed-Signal Microcontrollers datasheet (Rev. E) PDF | HTML 09 Dec 2019
* Errata MSP430FR2311 Microcontroller Errata (Rev. R) PDF | HTML 21 Oct 2021
* User guide MSP430FR4xx and MSP430FR2xx Family User's Guide (Rev. I) 13 Mar 2019
Application note Migration Guide From MSP430 MCUs to MSPM0 MCUs (Rev. B) PDF | HTML 02 Jun 2025
Circuit design Low-noise long-range PIR sensor conditioner circuit MSP430 smart analog combo (Rev. B) PDF | HTML 09 Oct 2024
Circuit design Single-supply low-side unidirectional current-sensing circuit with MSP430 SAC (Rev. B) PDF | HTML 09 Oct 2024
Circuit design High-side current-sensing circuit design with MSP430 smart analog combo (Rev. C) PDF | HTML 08 Oct 2024
Circuit design Low-side bidirectional current sensing circuit with MSP430™ smart analog combo (Rev. B) PDF | HTML 08 Oct 2024
Circuit design Strain gauge bridge amplifier circuit with MSP430 smart analog combo (Rev. B) PDF | HTML 08 Oct 2024
Circuit design Transimpedance amplifier circuit with MSP430 smart analog combo (Rev. B) PDF | HTML 07 Oct 2024
Circuit design Temperature Sensing NTC Circuit With MSP430 Smart Analog Combo (Rev. D) PDF | HTML 26 Sep 2024
User guide MSP430 FRAM Devices Bootloader (BSL) User's Guide (Rev. AB) PDF | HTML 22 Sep 2022
Application note UART-to-I2C Bridge Using Low-Memory MSP430™ MCUs (Rev. A) PDF | HTML 29 Sep 2021
Application note ESD Diode Current Specification (Rev. B) PDF | HTML 23 Aug 2021
Application note MSP430 FRAM Technology – How To and Best Practices (Rev. B) 12 Aug 2021
Application note Designing With the MSP430FR4xx and MSP430FR2xx ADC (Rev. A) PDF | HTML 02 Aug 2021
Application note Low-Power Battery Voltage Measurement With MSP430FR MCU On-Chip VREF and ADC (Rev. B) PDF | HTML 02 Aug 2021
Application note Migrating from MSP430 F2xx and G2xx families to MSP430 FR4xx and FR2xx family (Rev. G) PDF | HTML 02 Aug 2021
Application note Migration from MSP430 FR58xx, FR59xx, and FR6xx to FR4xx and FR2xx (Rev. B) PDF | HTML 02 Aug 2021
Application note MSP430 System-Level ESD Considerations (Rev. B) PDF | HTML 14 Jul 2021
User guide MSP430 MCUs Development Guide Book (Rev. A) PDF | HTML 13 May 2021
Application note MSP430FR2xx and MSP430FR4xx DCO+FLL Application Guide 07 Dec 2020
Application note Small Size Custom BSL Based on ROM BSL for MSP430 FRAM MCUs 30 Oct 2020
Application note MSP430 System ESD Troubleshooting Guide PDF | HTML 13 Dec 2019
White paper Enabling tomorrow’s sensing applications with smart analog microcontrollers (Rev. A) 22 Nov 2019
Application note How to Use the Smart Analog Combo and Transimpedance Amplifier on MSP430FR2311 (Rev. A) PDF | HTML 15 Nov 2019
Technical article Designing a blood glucose meter and pulse oximeter with the MSP430 MCU Smart Analo PDF | HTML 07 Sep 2018
Technical article Designing a smoke detector with the MSP430 MCU Smart Analog Combo PDF | HTML 09 Aug 2018
E-book Enhance simple analog and digital functions for $0.25 (Rev. B) 07 Feb 2018
Application note Code Porting From MSP430FR2000 to MSP430FR2311 MCUs 25 Oct 2017
Technical article Sense, measure and more with MSP430™ MCUs at embedded world 2017 PDF | HTML 14 Mar 2017
Technical article Value line MCUs bring more analog to personal electronic products PDF | HTML 17 Nov 2016
Technical article Health monitoring devices get a jolt from MCUs PDF | HTML 29 Sep 2016
Technical article When green meets the IoT PDF | HTML 18 Aug 2016
Technical article Smart buildings get smarter with ultra-low-power MCUs PDF | HTML 16 Aug 2016
Technical article Air quality monitors and smoke detectors put on a new face PDF | HTML 04 Aug 2016
Design guide MSP430FR2311 IR Reflection-Sensing Subsystem Design Guide 03 Aug 2016
Technical article IoT, wearables and other new applications create need for super-sensitive sensors PDF | HTML 25 Jul 2016
Application note General Oversampling of MSP ADCs for Higher Resolution (Rev. A) PDF | HTML 01 Apr 2016
Technical article Reach new low-power levels for any sensor based design with new MSP430FR2311 MCU PDF | HTML 22 Mar 2016
Application note VLO Calibration on the MSP430FR4xx and MSP430FR2xx Family (Rev. A) 19 Feb 2016
Application note MSP Code Protection Features PDF | HTML 07 Dec 2015
Application note MSP430 FRAM Quality and Reliability (Rev. A) 01 May 2014

Design & development

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Evaluation board

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Software development kit (SDK)

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Code example or demo

SLAC708 MSP430FR231x Code Examples

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Driver or library

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Firmware

MSPFRBOOT MSPFRBOOT

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Getting started

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IDE, configuration, compiler or debugger

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IDE, configuration, compiler or debugger

ENERGYTRACE — EnergyTrace Technology

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Online training

MSP430-ACADEMY MSP430™ academy

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Operating system (OS)

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UNIFLASH UniFlash for most TI microcontrollers (MCUs) and mmWave sensors

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Simulation model

MSP430FR2311 SAC TINA-TI Reference Design (Rev. C)

SLAM331C.TSC (567 KB) - TINA-TI Reference Design
Simulation model

MSP430FR2311 SAC TINA-TI Spice Model (Rev. C)

SLAM332C.ZIP (6 KB) - TINA-TI Spice Model
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MSP430FR231x TIA TINA-TI Reference Design

SLAM346.TSC (59 KB) - TINA-TI Reference Design
Simulation model

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SLAM347.ZIP (6 KB) - TINA-TI Spice Model
Design tool

CIRCUIT0020 — Transimpedance Amplifier Circuit

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Design tool

CIRCUIT060001 — Single-supply, low-side, unidirectional current-sensing circuit

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Design tool

CIRCUIT060002 — Temperature sensing with NTC thermistor circuit

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Design tool

CIRCUIT060003 — Temperature sensing with PTC thermistor circuit

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CIRCUIT060004 — Low-noise and long-range PIR sensor conditioner circuit

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Design tool

CIRCUIT060006 — Bridge amplifier circuit

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CIRCUIT060007 — Low-side bidirectional current-sensing circuit

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CIRCUIT060009 — Half-wave rectifier circuit

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CIRCUIT060090 — Temperature sensing negative-temperature-coefficient (NTC) circuit with MSP430 smart analog combo

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Design tool

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Design tool

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Design tool

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Design tool

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Reference designs

TIDA-01070 — HVAC Coil Airflow Sensor Reference Design for Predictive Maintenance in Air Filter Replacement

This design provides a reference for monitoring airflow efficiency and temperature through heat ventilation and air conditioner (HVAC) systems. The reference design is used in conjunction with solid state relays and piezoelectric vibration sensors to monitor and react accordingly to low airflow and (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01585 — 24V, 36W Sensorless BLDC Sinusoidal Motor Drive With Closed-Loop Speed Control Reference Design

This brushless DC (BLDC) motor drive reference design uses closed-loop control to achieve a very-high speed accuracy using only two chips. The first chip is a cost effective entry level MCU out of the popular ultra-low power MSP430 family. The other (DRV10987) is a three-phase, sensorless, (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDM-FRAM-IRREFLECTIONSENSING — MSP430FR2311 Microcontroller IR Reflection Sensing Reference Design

This reference design demonstrates an IR reflection sensing solution based on an MSP430™ FRAM microcontroller (MCU) with configurable analog for sensing and measurement applications. It demonstrates the MCU's ultra-low-power feature with the benefit of FRAM technology and integrated (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDM-FRAM-EEPROM — EEPROM Emulation and Sensing With MSP430 FRAM Microcontrollers

This reference design describes an implementation of emulating electrically-erasable programmable read-only memory (EEPROM) using Ferroelectric Random Access Memory (FRAM) technology on MSP430™ ultra-low-power microcontrollers (MCUs) combined with the additional sensing capabilities that can (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
TSSOP (PW) 20 Ultra Librarian
TSSOP (PW) 16 Ultra Librarian
VQFN (RGY) 16 Ultra Librarian

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