Texas Instruments MSP430F2122TRHBR

Overview

MSP430F2122TRHBR from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 4KB+256B flash, 512B RAM, a 10-bit 200-ksps ADC with internal reference and DTC, two 16-bit timers (Timer0_A3 with three capture/compare registers, Timer1_A2 with two), USCI_A0 (UART/LIN/IrDA/SPI) and USCI_B0 (SPI/I²C), and comparator_A+. It targets battery-powered sensor nodes and portable instrumentation requiring sub-µA standby operation.

For engineers reviewing the MSP430F2122TRHBR datasheet, MSP430F2122TRHBR pinout, MSP430F2122TRHBR application, or MSP430F2122TRHBR equivalent, key selection criteria include verified 0.7 µA standby current, calibrated DCO enabling <1 µs wake-up, integrated LIN-capable UART, and QFN-32 (RHB) package compatibility with space-constrained PCB layouts.

Technical Context

The MSP430F2122TRHBR implements a 16-bit CPU with seven addressing modes and constant generators for high code efficiency. Its basic clock module integrates a digitally controlled oscillator (DCO) with four factory-calibrated frequencies (±1%), 32-kHz crystal support, and external HF crystal/resonator options up to 16 MHz - all selectable via software-controlled clock sources (ACLK, SMCLK, MCLK).

Peripherals are memory-mapped and accessible via all CPU instructions. The USCI modules provide protocol-flexible serial communication: USCI_A0 supports asynchronous UART with auto-baudrate detection (LIN), IrDA encoding/decoding, and synchronous SPI; USCI_B0 supports synchronous SPI and I²C master/slave operation. The ADC10 includes sample-and-hold, autoscan, and data transfer controller (DTC) for autonomous conversion sequences without CPU intervention.

Key Specifications

Pinout & Package

Package: 32-pin QFN (RHB), 5 mm × 5 mm, 0.5 mm pitch, exposed thermal pad (connected to DVSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F2122TRHBR, the MSP430F2132TRHBR offers double flash capacity with zero layout change, while the MSP430G2553IRHB trades integrated analog features for greater program memory - making the former ideal for firmware growth and the latter better suited for digital-centric protocols.

Availability

MSP430F2122TRHBR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical instruments, industrial process monitors, and smart utility meter interfaces requiring stable component supply across multi-year production cycles.

Supply support for MSP430F2122TRHBR 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 microcontroller innovation.

The MSP430F21x2 product line delivers ultra-low-power mixed-signal control for battery-operated measurement and sensing applications - emphasizing sub-µA sleep currents, fast wake-up, and integrated analog peripherals to minimize external components.

FAQ

What is the maximum operating frequency of the MSP430F2122TRHBR?

The MSP430F2122TRHBR supports a maximum system clock (MCLK) frequency of 16 MHz, achieved using the internal digitally controlled oscillator (DCO) with factory calibration or an external high-frequency crystal/resonator up to 16 MHz. This enables 62.5-ns instruction execution cycles and real-time response in time-critical sensor acquisition tasks.

Does the MSP430F2122TRHBR support LIN bus communication?

Yes, the MSP430F2122TRHBR supports LIN bus communication through its USCI_A0 module, which implements enhanced UART with automatic baudrate detection (LIN). This allows the device to synchronize to incoming LIN header frames without prior knowledge of bus speed - essential for automotive body electronics and industrial control networks.

What is the purpose of the comparator_A+ module in the MSP430F2122TRHBR?

The comparator_A+ module in the MSP430F2122TRHBR provides precision analog signal comparison for battery voltage supervision, slope analog-to-digital conversion, and external signal monitoring. It features programmable hysteresis, multiple input sources including internal references, and direct connection to Timer0_A3 for event-triggered timing - enabling low-power threshold detection without ADC overhead.

Can the MSP430F2122TRHBR operate from a single 1.8 V supply?

Yes, the MSP430F2122TRHBR is fully specified to operate across a supply voltage range of 1.8 V to 3.6 V. At 1.8 V, it maintains full functionality including 16 MHz DCO operation (with reduced margin), ADC conversions, and peripheral operation - making it suitable for energy-harvesting and coin-cell applications where minimum voltage headroom is critical.

How is flash memory programmed on the MSP430F2122TRHBR?

Flash memory on the MSP430F2122TRHBR can be programmed via three methods: JTAG interface using MSP-FET430UIF debugger, onboard bootstrap loader (BSL) via UART using P1.1 (TX) and P2.2 (RX), or in-system by the CPU using flash control registers. All methods support byte/word writes and segment-level erase, with security fuse protection against unauthorized access.