Texas Instruments MSP430G2232IRSA16R

Overview

MSP430G2232IRSA16R from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 2 KB flash, 256 B RAM, a 10-bit 200-ksps ADC with internal reference and autoscan, one 16-bit Timer_A with three capture/compare registers, USI supporting SPI and I²C, and up to 8 capacitive-touch enabled I/O pins in a 16-pin QFN package. It targets battery-powered sensor nodes and portable measurement systems requiring sub-1-µs wake-up and <0.1 µA off-mode current.

For engineers reviewing the MSP430G2232IRSA16R datasheet, MSP430G2232IRSA16R pinout, MSP430G2232IRSA16R application, or MSP430G2232IRSA16R equivalent, key selection criteria include its 10-bit ADC channel count (8), USI interface flexibility, LPM4 current draw (0.1 µA), QFN-16 thermal performance, and Spy-Bi-Wire debug compatibility - all critical for compact, energy-constrained embedded designs.

Technical Context

The MSP430G2232IRSA16R implements a 16-bit CPU with seven addressing modes and 51 instructions, executing register-to-register operations in one CPU cycle. Its clock system integrates a digitally controlled oscillator (DCO) calibrated at 1/8/12/16 MHz, plus LF and ACLK sources, enabling sub-1-µs wake-up from LPM4 via interrupt on any I/O pin.

Peripherals are memory-mapped and accessible via all CPU instructions. The ADC10 module supports sample-and-hold, internal VREF+/VREF−, and DMA-assisted autoscan across eight analog inputs (A0–A7); the USI operates in both 3-wire SPI and I²C modes using shared SDA/SCL/SDO/SDI pins on Port 1.

Key Specifications

Pinout & Package

Package: 16-pin QFN (RSA), 3 mm × 3 mm, 0.4 mm pitch, exposed thermal pad connected to DVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2212IRSA16, the MSP430G2232IRSA16 adds integrated 10-bit ADC capability essential for analog sensing, while MSP430G2332IRSA16 trades no functional loss for doubled flash - making the MSP430G2232IRSA16 the optimal balance of analog integration, power efficiency, and cost for entry-level sensor endpoints.

Availability

MSP430G2232IRSA16R is available at Aetrix Electronics and suitable for smart sensor nodes, portable medical monitors, industrial control panels, and energy harvesting IoT endpoints requiring stable component supply and long-term manufacturability.

Supply support for MSP430G2232IRSA16R 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 delivering analog, embedded processing, and connectivity solutions with emphasis on power efficiency and system integration.

The MSP430G2xx family delivers ultra-low-power mixed-signal microcontrollers targeting battery-operated sensing, measurement, and control applications where energy per operation is critical.

FAQ

What is the maximum ADC sampling rate supported by the MSP430G2232IRSA16R?

The MSP430G2232IRSA16R supports a maximum ADC10 sampling rate of 200 ksps under specified conditions (VCC ≥ 2.2 V, ADC10CLK = 5 MHz). This rate is achievable using the internal DCO-derived clock and enables high-fidelity signal capture for vibration or audio-band sensors without external clock circuitry.

Does the MSP430G2232IRSA16R support hardware I²C communication?

Yes, the MSP430G2232IRSA16R supports hardware I²C through its Universal Serial Interface (USI) module. Pins P1.6 (SCL) and P1.7 (SDA) provide dedicated I²C functionality with built-in start/stop detection and address matching - eliminating bit-banged software implementations and ensuring timing compliance.

What is the minimum supply voltage for reliable operation of the MSP430G2232IRSA16R?

The MSP430G2232IRSA16R operates reliably from 1.8 V to 3.6 V. At 1.8 V, all peripherals-including ADC10, USI, and Timer_A-remain fully functional, and LPM4 current remains at 0.1 µA, enabling use with single-cell LiFePO₄ or two-cell alkaline batteries across their full discharge curve.

How many I/O pins on the MSP430G2232IRSA16R support capacitive-touch sensing?

Eight I/O pins (P1.0 through P1.7) on the MSP430G2232IRSA16R support capacitive-touch sensing via integrated pin-oscillator circuitry. Each pin can be individually enabled for touch detection without external components, allowing direct implementation of sliders, wheels, or discrete touch buttons in space-constrained designs.

Is Spy-Bi-Wire debugging supported on the MSP430G2232IRSA16R?

Yes, Spy-Bi-Wire debugging is fully supported on the MSP430G2232IRSA16R using the RST/NMI/SBWTDIO (Pin 10) and TEST/SBWTCK (Pin 11) pins. This two-wire interface enables full flash programming, breakpoint setting, and real-time variable inspection - reducing debug footprint versus four-wire JTAG.