Texas Instruments MSP430G2132IRSA16R

Overview

MSP430G2132IRSA16R from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 1 kB flash, 128 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/I²C, and capacitive-touch I/O capability - deployed in battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430G2132IRSA16R datasheet, MSP430G2132IRSA16R pinout, MSP430G2132IRSA16R application, or MSP430G2132IRSA16R equivalent, key selection criteria include its QFN-16 package, 1.8–3.6 V supply range, sub-1 µs wake-up from LPM4, integrated brownout detection, and Spy-Bi-Wire debug interface compatibility.

Technical Context

The MSP430G2132IRSA16R implements a 16-bit CPU with seven addressing modes and 51 instructions, paired with a digitally controlled oscillator (DCO) calibrated at 1/8/12/16 MHz for fast active-mode entry. Its clock system delivers ACLK (LF oscillator or 32-kHz crystal), MCLK (system clock), and SMCLK (peripheral clock) with independent gating control.

Peripherals are memory-mapped and accessible via all CPU instructions. The ADC10 module supports up to 8 analog inputs (A0–A7), internal 1.5 V/2.5 V references, sample-and-hold, and DMA-assisted autoscan - exclusively available on MSP430G2x32 series devices per functional block diagram and Table 2.

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 ultra-low-power mixed-signal microcontroller applications.

Compared with MSP430G2232IRSA16 and MSP430FR2132IRSA16, the MSP430G2132IRSA16 offers the smallest memory footprint and lowest BOM cost for fixed-function sensor nodes where code size is constrained to ≤1 kB and flash endurance suffices.

Availability

MSP430G2132IRSA16R is available at Aetrix Electronics and suitable for smart home sensor nodes, portable medical monitors, and industrial asset trackers requiring stable component supply, long-term lifecycle support, and TI-qualified automotive-grade traceability.

Supply support for MSP430G2132IRSA16R 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 focus on energy efficiency, reliability, and system-level integration.

The MSP430G2xx family targets ultra-low-power portable measurement and sensing applications, emphasizing extended battery life, integrated analog peripherals, and minimal external component count for cost-sensitive designs.

FAQ

What is the maximum ADC sampling rate supported by the MSP430G2132IRSA16R?

The MSP430G2132IRSA16R supports a maximum ADC10 sampling rate of 200 ksps (kilo-samples per second) when using the internal oscillator as the ADC10CLK source and operating within its specified voltage and temperature range. This rate is achievable with the internal 1.5 V or 2.5 V reference and enables high-fidelity capture of fast analog transients in sensor applications. The MSP430G2132IRSA16R ADC10 module includes autoscan mode to sequence through up to eight channels without CPU overhead.

Does the MSP430G2132IRSA16R support capacitive touch sensing on all I/O pins?

No, the MSP430G2132IRSA16R supports capacitive touch sensing only on Port 1 pins P1.0 through P1.7, as confirmed by the functional block diagram and "Pin-Osc" signal routing in Table 11. These pins integrate dedicated hardware oscillator circuitry that enables low-power, noise-immune touch detection without external components. Port 2 pins (P2.0–P2.5) lack this capability and are limited to standard digital I/O functions. The MSP430G2132IRSA16R datasheet explicitly states "up to 16 capacitive-touch enabled I/O pins" applies to the broader G2x32 family, but device-specific pin mapping restricts it to P1.x for this variant.

What debug interface does the MSP430G2132IRSA16R use, and what pins are required?

The MSP430G2132IRSA16R uses the Spy-Bi-Wire (SBW) interface - a 2-wire subset of JTAG - for debugging and programming. It requires only two pins: RST/NMI/SBWTDIO (Pin 10) and TEST/SBWTCK (Pin 11). Unlike full 4-wire JTAG, SBW reduces PCB routing complexity and connector count while retaining full emulation, flash programming, and breakpoint capabilities. The MSP430G2132IRSA16R does not support UART or SWD interfaces; SBW is its sole standardized debug path.

Can the MSP430G2132IRSA16R operate from a 3.3 V supply while driving a 3.3 V SPI peripheral?

Yes, the MSP430G2132IRSA16R operates across 1.8 V to 3.6 V, making 3.3 V a fully supported supply voltage. Its I/O pins are CMOS-compatible and tolerate voltages up to VCC + 0.3 V, so driving a 3.3 V SPI peripheral directly is safe and electrically compliant. No level-shifting is required when interfacing with other 3.3 V logic devices, provided both share the same DVSS reference. The MSP430G2132IRSA16R USI module supports SPI master/slave modes with configurable clock polarity and phase to match peripheral timing requirements.

Is the ADC10 module available on all MSP430G2x32 variants, including the MSP430G2132IRSA16R?

Yes, the ADC10 module is a defining feature of the MSP430G2x32 series and is present on all members, including the MSP430G2132IRSA16R. This is explicitly stated in the device description ("MSP430G2x32 series have a 10-bit A/D converter"), confirmed in Table 1 where MSP430G2132IRSA16 is listed under the "ADC10 Channel" column with value "1", and reinforced by the "NOTE: ADC10 pin functions are available only on MSP430G2x32" callouts in the pinout diagrams. The MSP430G2132IRSA16R provides 8 analog inputs (A0–A7) mapped to P1.x pins.