Texas Instruments MSP430G2112IRSA16R

Overview

MSP430G2112IRSA16R from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller in 16-pin QFN (RSA) package, featuring 1 kB Flash, 128 B RAM, one 16-bit Timer_A with three capture/compare registers, Universal Serial Interface (USI) for SPI/I²C, and on-chip comparator. It operates from 1.8 V to 3.6 V and supports capacitive-touch I/O - ideal for battery-powered sensor nodes and portable instrumentation.

For engineers reviewing the MSP430G2112IRSA16R datasheet, MSP430G2112IRSA16R pinout, MSP430G2112IRSA16R application, or MSP430G2112IRSA16R equivalent, key selection criteria include its 1 kB Flash size, absence of ADC10 (distinguishing it from G2x52 variants), USI-based serial connectivity, low-power operating modes (LPM0–LPM4), and Spy-Bi-Wire debug interface compatibility.

Technical Context

The MSP430G2112IRSA16R 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 oscillator and external crystal support - enabling sub-1 µs wake-up from LPM4.

Peripheral integration includes USI supporting master/slave SPI and I²C protocols, Comparator_A+ with eight input channels, and Timer_A3 with three capture/compare registers for PWM, timing, and event capture. Port P1 offers eight programmable I/O pins with individually configurable pullup/pulldown resistors and capacitive-touch enable bits; Port P2 provides two I/O pins in the RSA16 package.

Key Specifications

Pinout & Package

Package: 16-pin QFN (RSA), 4 mm × 4 mm, 0.65 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 microcontroller applications.

Compared with MSP430G2212IRSA16, the MSP430G2112IRSA16 offers identical low-power performance and USI capability at lower memory cost; versus MSP430G2102IRSA16, it adds critical hardware serial support - making it the optimal balance of cost, features, and upgrade path for sensor-edge applications.

Availability

MSP430G2112IRSA16R is available at Aetrix Electronics and suitable for battery-powered sensor nodes, portable medical monitors, industrial control panels, and energy harvesting endpoints requiring stable component supply and long-term manufacturability.

Supply support for MSP430G2112IRSA16R 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 for industrial, automotive, and consumer markets.

The MSP430G2xx family targets ultra-low-power embedded applications - designed specifically for extended battery life in portable measurement, sensing, and simple control systems where energy efficiency is paramount.

FAQ

Does the MSP430G2112IRSA16R include an integrated ADC?

No, the MSP430G2112IRSA16R does not include the ADC10 module. It belongs to the G2x12 series, which omits the 10-bit analog-to-digital converter present in G2x52 variants. Analog sensing must be performed using the on-chip Comparator_A+ or external ADCs interfaced via USI or GPIO. This distinction is confirmed in Table 1 and functional block diagrams of the SLAS722G datasheet.

What is the maximum operating frequency of the MSP430G2112IRSA16R?

The MSP430G2112IRSA16R supports internal DCO frequencies up to 16 MHz, factory-calibrated at 1/8/12/16 MHz. The CPU executes instructions at 62.5 ns per cycle at 16 MHz. External clock sources (e.g., 32.768 kHz crystal or digital clock) may also drive ACLK or SMCLK, but MCLK - used by the CPU - is derived from the DCO or selected internal oscillator.

Can the MSP430G2112IRSA16R be programmed in-circuit without removing it from the PCB?

Yes, the MSP430G2112IRSA16R supports in-system programming via its Spy-Bi-Wire (SBW) interface using two pins: RST/NMI/SBWTDIO and TEST/SBWTCK. No external programming voltage is required. TI's MSP-FET or compatible debuggers can program and debug the device while soldered on the target board, provided SBW signals are accessible and properly routed.

How many I/O pins are available on the MSP430G2112IRSA16R in the QFN package?

The MSP430G2112IRSA16R provides eight I/O pins on Port P1 (P1.0–P1.7) and two I/O pins on Port P2 (P2.0, P2.1), totaling ten general-purpose digital I/O pins in the 16-pin QFN (RSA) package. P2.2–P2.5 are not bonded out in this package variant, as confirmed in the "Terminal Functions" table and functional block diagram notes of SLAS722G.

Is the MSP430G2112IRSA16R pin-compatible with other devices in the MSP430G2xx family?

The MSP430G2112IRSA16R shares the same 16-pin QFN (RSA) package and pinout with other G2xx devices in that footprint - including MSP430G2212IRSA16, MSP430G2312IRSA16, and MSP430G2412IRSA16. However, peripheral availability differs: only G2x52 variants include ADC10, and memory sizes vary. Firmware and hardware design must verify peripheral register mapping and feature enablement before substitution.