Texas Instruments MSP430F2122IRTVR

Overview

MSP430F2122IRTVR 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 MSP430F2122IRTVR datasheet, MSP430F2122IRTVR pinout, MSP430F2122IRTVR application, or MSP430F2122IRTVR equivalent, key selection criteria include its 0.7 µA standby current, 250 µA active current at 1 MHz/2.2 V, 32-pin QFN (RTV) package with 24 GPIOs, integrated DCO calibrated to ±1%, and LIN-capable UART for automotive body electronics.

Technical Context

The MSP430F2122IRTVR implements a 16-bit RISC CPU with seven addressing modes and register-to-register execution in one cycle. Its basic clock module integrates a digitally controlled oscillator (DCO), 32-kHz crystal oscillator, and high-frequency crystal support up to 16 MHz - enabling wake-up from LPM4 in under 1 µs via DCO stabilization.

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

Key Specifications

Pinout & Package

Package: 32-pin QFN (RTV), 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 MSP430F2122IRTVR, the MSP430F2012IPW offers lower cost and smaller size but sacrifices LIN capability and peripheral integration, while the MSP430G2553IPW28R provides greater memory and flexibility at the expense of certified LIN compliance and QFN thermal performance.

Availability

MSP430F2122IRTVR is available at Aetrix Electronics and suitable for smart sensor nodes, portable medical devices, and automotive body electronics requiring stable component supply, long-term lifecycle assurance, and TI-qualified industrial-grade reliability.

Supply support for MSP430F2122IRTVR 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 over 90 years of innovation in low-power design.

The MSP430F21x2 product line was engineered specifically for ultra-low-power portable measurement and sensing applications - emphasizing sub-µA sleep currents, fast wake-up, integrated analog peripherals, and minimal external components.

FAQ

What is the maximum operating frequency of the MSP430F2122IRTVR?

The MSP430F2122IRTVR supports a maximum system clock (MCLK) frequency of 16 MHz, achieved using the internal digitally controlled oscillator (DCO) with factory calibration to ±1% at 3 V and 30°C. External crystal oscillators up to 16 MHz are also supported via the HF crystal pins (XIN/XOUT), and the DCO can be locked to external references for improved stability in timing-critical applications. The MSP430F2122IRTVR maintains full functionality across its 1.8–3.6 V supply range at this speed.

Does the MSP430F2122IRTVR support LIN bus communication out of the box?

Yes, the MSP430F2122IRTVR includes hardware-level LIN support through its USCI_A0 module, which implements automatic baudrate detection per ISO 9141-2. This allows the MSP430F2122IRTVR to act as a LIN slave node without external transceivers or software baud estimation - the UART detects dominant pulse width on wakeup and configures itself accordingly. No additional firmware stack is required for basic LIN physical layer compliance.

How many GPIO pins does the MSP430F2122IRTVR provide in the RTV package?

The MSP430F2122IRTVR in the 32-pin QFN (RTV) package provides 24 individually configurable GPIO pins across Ports P1 (8 pins), P2 (8 pins), and P3 (8 pins). All pins support programmable pullup/pulldown resistors, edge-selectable interrupts (P1 and P2), and multiple peripheral functions - including timer capture/compare, ADC inputs, USCI signals, and comparator interfaces - with no dedicated "pure GPIO" limitation.

Can the MSP430F2122IRTVR perform ADC conversions without CPU involvement?

Yes, the MSP430F2122IRTVR's ADC10 module includes a Data Transfer Controller (DTC) that autonomously moves conversion results from ADC10MEM into user-defined RAM locations without CPU execution. When configured with autoscan and DTC enabled, the MSP430F2122IRTVR can acquire sequences of up to 16 channels, store results, and trigger an interrupt upon completion - reducing active-mode time and power consumption significantly in periodic sensing applications.

What debug interface does the MSP430F2122IRTVR use, and what tools are compatible?

The MSP430F2122IRTVR uses the 2-wire Spy-Bi-Wire (SBW) interface via RST/NMI/SBWTDIO and TEST/SBWTCK pins for programming and debugging. It is fully compatible with TI's MSP-FET430UIF (USB) and MSP-FET430PIF (parallel port) debuggers, as well as the MSP-FET430U28 target board for PW-package evaluation. SBW provides full JTAG-equivalent functionality - including breakpoints, register inspection, and flash programming - in a space-constrained 2-pin implementation.