Texas Instruments MSP430F2131TRGET

Overview

MSP430F2131TRGET from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 8 KB flash memory, 256 B RAM, a 16-bit Timer_A with three capture/compare registers, and an on-chip analog comparator for slope A/D conversion. It operates from 1.8 V to 3.6 V and supports active-mode current of 250 μA at 1 MHz/2.2 V - optimized for battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430F2131TRGET datasheet, MSP430F2131TRGET pinout, MSP430F2131TRGET application, or MSP430F2131TRGET equivalent, key selection criteria include its -40°C to 105°C extended temperature rating, TSSOP-20 package, integrated DCO with four factory-calibrated frequencies (1/8/12/16 MHz), and JTAG + BSL programming support without external voltage.

Technical Context

The MSP430F2131TRGET implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations and high code efficiency. Its basic clock module integrates a digitally controlled oscillator (DCO), 32-kHz crystal input (XIN/XOUT), and high-frequency crystal support up to 16 MHz - all configurable via BCSCTL registers.

It features two 8-bit I/O ports (P1 and P2) with individually programmable pullup/pulldown resistors, edge-selectable interrupts, and peripheral function multiplexing (e.g., TA0/TA1/TA2, CA0–CA7, SMCLK/TCK). The Comparator_A+ module enables analog signal comparison and slope ADC functionality without external components.

Key Specifications

Pinout & Package

Package: 20-pin TSSOP (PW), RoHS-compliant, body size 6.5 mm × 4.4 mm, 0.65 mm pitch. Thermal performance enhanced by exposed pad (connected to VSS).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power mixed-signal microcontroller applications.

Compared with MSP430F2121TRGET, the MSP430F2131TRGET provides double flash capacity for larger firmware or calibration data, while compared with MSP430F2330TRGCR, it offers identical TSSOP-20 footprint and lower system cost at the expense of integrated ADC and serial peripherals.

Availability

MSP430F2131TRGET is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical diagnostics, and smart utility meter interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MSP430F2131TRGET includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in ultra-low-power design.

The MSP430F2131TRGET belongs to the MSP430x2xx ultra-low-power MCU family, engineered specifically for battery-operated measurement and sensing applications where energy efficiency, integration, and reliability are critical.

FAQ

What is the maximum operating frequency of the MSP430F2131TRGET?

The MSP430F2131TRGET supports a maximum MCLK frequency of 16 MHz when VCC ≥3.3 V and duty cycle is 50% ±10%. This is achieved using the factory-calibrated DCO setting CALBC1_16MHZ/CALDCO_16MHZ. At lower supply voltages (e.g., 2.2 V), the maximum reliable frequency drops to 6 MHz per TI's recommended operating conditions. The MSP430F2131TRGET does not require an external crystal to reach 16 MHz - the internal DCO suffices.

Does the MSP430F2131TRGET support in-system programming without a JTAG debugger?

Yes, the MSP430F2131TRGET includes a UART-based bootstrap loader (BSL) that enables flash programming via P1.1 (TX) and P2.2 (RX) pins using standard TTL-level serial communication. No JTAG interface or external programming voltage is required. The BSL is protected by a user-configurable password and can be permanently disabled using the security key 0xAA55 stored at address 0xFFDE. This makes the MSP430F2131TRGET ideal for field firmware updates and low-cost manufacturing programming.

What is the purpose of the Comparator_A+ module in the MSP430F2131TRGET?

The Comparator_A+ module in the MSP430F2131TRGET provides precision analog signal comparison and enables slope analog-to-digital conversion without external components. It features eight selectable inputs (CA0–CA7), internal hysteresis control, and output routing to Timer_A for automatic timing-based digitization. In slope ADC mode, the MSP430F2131TRGET uses the comparator output to trigger Timer_A captures - converting analog voltage to digital value via time measurement. This eliminates the need for a dedicated ADC in cost-sensitive designs.

Which development tools are compatible with the MSP430F2131TRGET?

The MSP430F2131TRGET is supported by Texas Instruments' full MSP430 toolchain, including Code Composer Studio (CCS) and IAR Embedded Workbench. Hardware tools include the MSP-FET430UIF (USB JTAG programmer), MSP-TS430PW28 (TSSOP-20 target board), and MSP-FET430U28 (for PW-package debugging). All devices in the MSP430F21x1 series share the same EEM module, ensuring consistent debug behavior across variants. The MSP430F2131TRGET also works with open-source tools like naken_asm and mspdebug via Spy-Bi-Wire.

How does the MSP430F2131TRGET handle power-supply brownout conditions?

The MSP430F2131TRGET integrates a programmable brownout detector that monitors VCC and asserts a reset when voltage falls below a threshold - preventing erratic operation or flash corruption during power ramp-up/down. The detector is enabled by default after power-on reset and triggers at ~1.3 V (typical). Its flag (PORIFG) is accessible in IFG1, and the module is documented in the "Brownout" section of the SLAS439F datasheet. No external components are needed; the MSP430F2131TRGET handles detection and reset autonomously.