Texas Instruments MSP430G2102IRSA16R

Overview

MSP430G2102IRSA16R from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with 1 kB Flash, 128 B RAM, one 16-bit Timer_A with three capture/compare registers, Universal Serial Interface (USI) supporting SPI and I²C, and up to 16 capacitive-touch enabled I/O pins. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and simple control systems requiring fast wake-up (<1 µs) and sub-µA standby current.

For engineers reviewing the MSP430G2102IRSA16R datasheet, MSP430G2102IRSA16R pinout, MSP430G2102IRSA16R application, or MSP430G2102IRSA16R equivalent, key selection criteria include its QFN-16 package, absence of integrated ADC10 (distinguishing it from G2x32 variants), Spy-Bi-Wire debug interface, and support for five low-power modes - critical for energy-constrained embedded designs.

Technical Context

The MSP430G2102IRSA16R implements a 16-bit CPU with seven addressing modes and 51 instructions, executing register-to-register operations in one CPU clock cycle. Its basic clock module integrates a digitally controlled oscillator (DCO) calibrated at 1/8/12/16 MHz, internal LF oscillator, and external crystal support (32 kHz), enabling flexible clock sourcing for MCLK, SMCLK, and ACLK.

It features two 8-bit digital I/O ports (P1 and P2), each with individually programmable pullup/pulldown resistors, edge-selectable interrupts, and pin-oscillator capability for capacitive touch. The USI module provides hardware-level SPI and I²C protocol handling without CPU intervention, while the WDT+ module supports both watchdog reset and interval timer interrupt functions.

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 microcontroller applications.

Compared with MSP430G2202IRSA16, the MSP430G2102IRSA16 offers identical low-power performance and peripheral set at lower memory cost; versus MSP430G2112IRSA16, it trades ADC functionality for marginally lower system BOM cost where analog inputs are handled externally.

Availability

MSP430G2102IRSA16R is available at Aetrix Electronics and suitable for smart sensor nodes, industrial HMI panels, portable medical devices, and energy monitoring modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance.

Supply support for MSP430G2102IRSA16R 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 and embedded processing solutions, with decades of expertise in ultra-low-power microcontrollers and precision analog ICs.

The MSP430G2xx family was designed specifically for cost-sensitive, battery-operated applications demanding nanowatt-level power management, rapid wake-up response, and integrated mixed-signal peripherals - targeting sensor, metering, and human-interface markets.

FAQ

Does the MSP430G2102IRSA16R include an integrated analog-to-digital converter (ADC)?

No, the MSP430G2102IRSA16R does not include the ADC10 module. This distinguishes it from the MSP430G2x32 series (e.g., MSP430G2132). The MSP430G2102IRSA16R is part of the G2x02 series, which omits the 10-bit ADC but retains all other core peripherals including Timer_A, USI, and capacitive-touch I/O. External ADCs must be used if analog signal conversion is required.

What is the maximum operating frequency of the MSP430G2102IRSA16R?

The MSP430G2102IRSA16R supports a maximum system clock frequency of 16 MHz via its factory-calibrated DCO. This frequency is achievable across the full 1.8 V–3.6 V supply range and ambient temperature range, as verified in the SLAS723H datasheet. The DCO is stable enough for UART communication at 115.2 kbps and precise PWM generation without external crystal.

Can the MSP430G2102IRSA16R be programmed using standard JTAG tools?

The MSP430G2102IRSA16R uses the Spy-Bi-Wire (SBW) interface - a 2-wire subset of JTAG - for programming and debugging. It is compatible with TI's MSP-FET and compatible third-party debuggers that support SBW. Standard 4-wire JTAG tools are not directly compatible unless they explicitly support SBW mode and the correct pin mapping (SBWTDIO on RST/NMI, SBWTCK on TEST).

What are the recommended decoupling practices for the MSP430G2102IRSA16R QFN package?

TI recommends placing a 100 nF ceramic capacitor between DVCC and DVSS as close as possible to Pins 1 and 14. A second 4.7 µF tantalum or ceramic capacitor should be placed near the power entry point. AVCC and AVSS (Pins 15 and 13) must be externally shorted to DVCC and DVSS respectively, with no separate filtering - the MSP430G2102IRSA16R has no internal analog circuitry requiring isolated supplies.

Is the MSP430G2102IRSA16R pin-compatible with other devices in the MSP430G2xx family?

Yes, the MSP430G2102IRSA16R shares the same 16-pin QFN (RSA) package and pinout with other G2xx devices in that package option, including MSP430G2202IRSA16, MSP430G2112IRSA16, and MSP430G2212IRSA16. Functional differences (e.g., ADC presence, Flash/RAM size) do not affect physical compatibility, enabling drop-in replacement where firmware and system requirements align.