Texas Instruments MSP430G2132IPW20R

Overview

MSP430G2132IPW20R 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 up to eight capacitive-touch enabled I/O pins. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430G2132IPW20R datasheet, MSP430G2132IPW20R pinout, MSP430G2132IPW20R application, or MSP430G2132IPW20R equivalent, key selection criteria include its 10-bit ADC channel count, TSSOP-20 package compatibility, Spy-Bi-Wire debug interface, low-power mode timing (sub-1 µs wake-up), and integrated brownout detection for robust operation in energy-constrained embedded designs.

Technical Context

The MSP430G2132IPW20R implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations. Its clock system integrates a digitally controlled oscillator (DCO) calibrated at 1/8/12/16 MHz, plus LF and ACLK sources - all configurable via BCSCTL registers without external components.

Peripherals are memory-mapped and accessible via full instruction set support. The ADC10 module includes internal voltage reference, sample-and-hold, and autoscan across one analog input channel; Timer_A supports PWM, capture, and interval timing with interrupt capability on overflow and each CCR; USI provides hardware-level SPI and I²C protocol handling with dedicated shift register and bit counter.

Key Specifications

Pinout & Package

Package: 20-pin Thin Shrink Small Outline Package (TSSOP), 6.5 mm × 4.4 mm body, 0.65 mm lead pitch, thermal pad optional.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2232IPW20 and MSP430FR2132IPW20, the MSP430G2132IPW20R offers the smallest memory footprint and lowest bill-of-materials cost in the G2x32 family while retaining core ultra-low-power analog and timing features - making it optimal for cost-sensitive, single-sensor edge nodes where firmware size is tightly constrained.

Availability

MSP430G2132IPW20R is available at Aetrix Electronics and suitable for smart sensor nodes, portable medical monitors, and industrial control panels requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for MSP430G2132IPW20R 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, reliability, and broad ecosystem support.

The MSP430G2xx series was designed specifically for ultra-low-power embedded sensing and measurement applications - prioritizing nanowatt operation, integrated analog peripherals, and minimal external component count in compact form factors.

FAQ

What is the maximum ADC sampling rate supported by the MSP430G2132IPW20R?

The MSP430G2132IPW20R supports a maximum ADC10 sampling rate of 200 ksps under optimal conditions (VCC = 3.3 V, ADC10CLK = 5 MHz). This rate assumes internal reference use and autoscan disabled; actual throughput depends on clock source stability and software overhead for result handling. The MSP430G2132IPW20R ADC10 module includes sample-and-hold and internal reference, enabling standalone operation without external components.

Does the MSP430G2132IPW20R support capacitive touch sensing?

Yes, the MSP430G2132IPW20R supports capacitive touch sensing on up to eight I/O pins (P1.0–P1.7) using its integrated pin-oscillator circuitry. Each pin can be individually enabled for touch detection via the PxIES and PxIFG registers. The MSP430G2132IPW20R does not require external RC networks or dedicated touch controller ICs, reducing BOM cost and PCB area for simple user interfaces.

What debug interface does the MSP430G2132IPW20R use, and what pins are required?

The MSP430G2132IPW20R uses the Spy-Bi-Wire (SBW) interface, a 2-wire variant of JTAG. It requires only two pins: RST/NMI/SBWTDIO (Pin 16) and TEST/SBWTCK (Pin 17). This minimizes debug footprint versus full 4-wire JTAG and is fully supported by TI's MSP-FET and Code Composer Studio. The MSP430G2132IPW20R retains SBW functionality even in low-power modes, enabling live debugging during deep sleep transitions.

Can the MSP430G2132IPW20R operate from a single 1.8 V supply?

Yes, the MSP430G2132IPW20R is fully specified to operate across 1.8 V to 3.6 V, including at the minimum 1.8 V supply. At 1.8 V, it maintains full functionality of the CPU, ADC10 (with reduced max sampling rate), Timer_A, USI, and I/O - making it suitable for energy-harvesting or coin-cell applications where regulated 3.3 V is unavailable. The MSP430G2132IPW20R brownout detector remains active down to 1.7 V to ensure safe reset behavior.

How many analog input channels does the ADC10 module support on the MSP430G2132IPW20R?

The ADC10 module on the MSP430G2132IPW20R supports one analog input channel (A0–A7 selectable via ADC10INCHx bits), but it can autoscan up to eight inputs sequentially without CPU intervention. Table 1 confirms "1" under the ADC10 column for MSP430G2132 variants, meaning the hardware supports eight input pins mapped to a single SAR converter. The MSP430G2132IPW20R ADC10AE0 register enables analog function per pin, allowing flexible channel assignment within this single-converter architecture.