Texas Instruments MSP430G2111IRSA16T

Overview

MSP430G2111IRSA16T from Texas Instruments is an ultralow-power 16-bit mixed-signal microcontroller featuring 1 kB flash, 128 B RAM, a 16-bit Timer_A with two capture/compare registers, an on-chip analog comparator, and operation across 1.8 V–3.6 V. It delivers 16 MHz max MCLK, sub-1 µs wake-up from LPM4, and supports battery-powered sensor signal acquisition and processing in compact embedded systems.

For engineers reviewing the MSP430G2111IRSA16T datasheet, MSP430G2111IRSA16T pinout, MSP430G2111IRSA16T application, or MSP430G2111IRSA16T equivalent, key selection criteria include its QFN-16 package, 10 I/O pins (8 on P1, 2 on P2), integrated comparator for slope A/D, five low-power modes, and Spy-Bi-Wire debug interface - all critical for energy-constrained measurement and control designs.

Technical Context

The MSP430G2111IRSA16T implements a 16-bit RISC CPU with constant generators and 16 general-purpose registers, enabling single-cycle instruction execution at up to 16 MHz. Its clock system integrates a digitally controlled oscillator (DCO), internal low-frequency oscillator (VLO), and external 32-kHz crystal support via XIN/XOUT pins.

It features a dedicated Comparator_A+ module with eight selectable inputs (CA0–CA7) and CAOUT output, supporting analog threshold detection and slope-based ADC conversion. The Timer_A2 peripheral provides dual capture/compare channels, PWM generation, and interrupt-driven timing - all synchronized to ACLK, SMCLK, or TACLK sources.

Key Specifications

Pinout & Package

Package: 16-pin QFN (RSA), 3 mm × 3 mm, exposed thermal pad recommended to be connected to DVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2211IRSA16, the MSP430G2111IRSA16 trades flash capacity for cost-sensitive analog sensing; versus MSP430G2101IRSA16, it adds essential comparator functionality without increasing pin count or power consumption - making it optimal for analog-triggered, battery-limited edge nodes.

Availability

MSP430G2111IRSA16T is available at Aetrix Electronics and suitable for smart sensor nodes, battery monitors, energy-harvesting controllers, and industrial I/O interfaces requiring stable component supply and long-term manufacturability.

Supply support for MSP430G2111IRSA16T 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 low-power microcontrollers and precision analog solutions.

The MSP430G2xx family targets ultralow-power measurement and control applications, emphasizing extended battery life, integrated analog peripherals, and streamlined development for cost-sensitive embedded systems.

FAQ

What is the maximum operating frequency of the MSP430G2111IRSA16T?

The MSP430G2111IRSA16T supports a maximum MCLK frequency of 16 MHz when VCC ≥ 3.3 V, with DCO calibration data pre-programmed in flash segment A. At 1.8 V, the maximum safe frequency drops to 6 MHz per TI's recommended operating conditions. This scaling ensures reliable timing across wide voltage ranges typical in battery-powered designs, and the MSP430G2111IRSA16T maintains consistent instruction cycle timing regardless of supply voltage due to its RISC architecture.

Does the MSP430G2111IRSA16T include an analog-to-digital converter (ADC)?

The MSP430G2111IRSA16T does not integrate a successive-approximation (SAR) or sigma-delta ADC. Instead, it features the Comparator_A+ module, which supports slope-based analog-to-digital conversion by combining the comparator output with Timer_A to measure input voltage against a known ramp. This technique achieves effective 10–12 bit resolution in firmware without dedicated ADC hardware, and the MSP430G2111IRSA16T leverages this capability for low-cost voltage monitoring and sensor digitization.

How many I/O pins does the MSP430G2111IRSA16T provide, and what are their capabilities?

The MSP430G2111IRSA16T provides 10 digital I/O pins: P1.0 through P1.7 (8 pins) and P2.6 through P2.7 (2 pins). Each pin supports individually configurable direction, pullup/pulldown resistors, interrupt-on-edge, and peripheral function multiplexing (e.g., TA0CLK, CA0, TCK). No pins are dedicated-only; all 10 can serve as general-purpose I/O unless assigned to a peripheral function, and the MSP430G2111IRSA16T retains full interrupt capability on all P1 pins and both P2 pins.

What debug interface does the MSP430G2111IRSA16T support, and how is it implemented?

The MSP430G2111IRSA16T supports the Spy-Bi-Wire (SBW) debug interface using pins RST/NMI/SBWTDIO (Pin 10) and TEST/SBWTCK (Pin 11). SBW is a two-wire subset of JTAG that enables full in-system programming, breakpoint setting, and real-time register inspection. Unlike standard JTAG, SBW requires no additional pins beyond reset and test, and the MSP430G2111IRSA16T uses this interface exclusively - eliminating the need for a 4-pin JTAG header and simplifying PCB layout.

Is the MSP430G2111IRSA16T pin-compatible with other devices in the MSP430G2x11 family?

Yes, the MSP430G2111IRSA16T is pin-compatible with all RSA-package variants in the MSP430G2x11 family, including MSP430G2211IRSA16 and MSP430G2011IRSA16. They share identical 16-pin QFN footprints, power/ground pin locations, I/O assignments, and peripheral pin mappings (e.g., P1.0 = ACLK/TA0CLK, P1.6 = TA0.1/CA6). Firmware developed for one RSA variant can be reused across others with only flash/RAM and peripheral enable adjustments - and the MSP430G2111IRSA16T benefits directly from this hardware consistency.