Texas Instruments MSP430F2002IRSAR

Overview

MSP430F2002IRSAR from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 1KB + 256B flash memory, 128B RAM, and a 16-bit Timer_A with two capture/compare registers. It operates from 1.8 V to 3.6 V and supports five power-saving modes, enabling sub-1 µs wake-up from standby - ideal for battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430F2002IRSAR datasheet, MSP430F2002IRSAR pinout, MSP430F2002IRSAR application, or MSP430F2002IRSAR equivalent, key selection criteria include its integrated USI (SPI/I²C), 10-bit 200-ksps ADC with autoscan, brownout detection, and Spy-Bi-Wire on-chip emulation - all in a space-constrained 16-pin QFN package.

Technical Context

The MSP430F2002IRSAR implements a 16-bit CPU with constant generators and seven addressing modes, executing instructions in one CPU clock cycle (62.5 ns at 16 MHz). Its basic clock module integrates a digitally controlled oscillator (DCO) calibrated to ±1% at four frequencies (1/8/12/16 MHz), plus support for 32-kHz crystal and external digital clock sources.

It features a universal serial interface (USI) supporting both SPI and I²C protocols, a 10-bit successive-approximation ADC with internal reference, sample-and-hold, and eight-channel autoscan, and a comparator-based analog front end compatible with slope A/D conversion - all managed via dedicated peripheral control registers accessible through standard instruction set.

Key Specifications

Pinout & Package

Package: 16-pin QFN (RSA), 3 mm × 3 mm, exposed thermal pad (recommended connection to VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F2002IRSAR, the MSP430F2012IRSAR offers identical functionality with doubled flash capacity for larger firmware, while the MSP430G2553IRSA trades factory DCO accuracy for UART capability - making the F2002 optimal for cost-sensitive, crystal-free, SPI/I²C sensor controllers where flash headroom is sufficient.

Availability

MSP430F2002IRSAR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and industrial data loggers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for MSP430F2002IRSAR 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 specializing in analog, embedded processing, and connectivity technologies with over 50 years of microcontroller innovation.

The MSP430F20xx series targets ultra-low-power sensing and measurement applications - designed to maximize battery life in portable instrumentation, environmental monitoring, and energy-harvesting systems through aggressive power gating and fast wake-up response.

FAQ

What is the maximum operating frequency of the MSP430F2002IRSAR?

The MSP430F2002IRSAR supports an internal digitally controlled oscillator (DCO) calibrated to operate up to 16 MHz, with factory-stored calibration constants in flash segment A. This allows the device to achieve full-speed execution without requiring an external crystal, though it can also accept external clock sources or a 32-kHz watch crystal for low-power timing domains. The 16-MHz DCO enables 62.5-ns instruction cycle time for real-time sensor processing tasks within the MSP430F2002IRSAR's ultra-low-power envelope.

Does the MSP430F2002IRSAR support UART communication?

No, the MSP430F2002IRSAR does not include a hardware UART peripheral. It features a Universal Serial Interface (USI) module that supports only SPI and I²C protocols natively. While software-based UART bit-banging is possible on GPIO pins, it consumes CPU resources and lacks the timing precision and interrupt efficiency of dedicated UART hardware. For designs requiring native UART, alternatives like the MSP430G2553IRSA - which supports UART emulation via USI - should be evaluated instead of the MSP430F2002IRSAR.

What package type and pin count does the MSP430F2002IRSAR use?

The MSP430F2002IRSAR is packaged in a 16-pin QFN (RSA) variant measuring 3 mm × 3 mm with an exposed thermal pad. This package provides compact footprint and improved thermal performance compared to the 14-pin TSSOP or PDIP options in the same family. Pin assignments match the MSP430F20x2 functional group, including dual-supply analog/digital rails (AVCC/AVSS, DVCC/DVSS), USI-capable I/O (P1.4–P1.7), and Spy-Bi-Wire debug interface (RST/NMI/SBWTDIO and TEST/SBWTCK) - all verified in TI's SLAS491I datasheet.

How much flash memory is available on the MSP430F2002IRSAR?

The MSP430F2002IRSAR contains 1KB of main flash memory for program code and 256B of information flash memory used for calibration data and user-configurable non-volatile storage. Flash is organized into 512-byte segments and supports byte- and word-level writes via the CPU or Spy-Bi-Wire interface. Segment A (010FFh–01000h) holds factory DCO calibration constants and is protected after reset unless explicitly unlocked - a safeguard ensuring consistent timing behavior across the MSP430F2002IRSAR's operational lifetime.

Can the MSP430F2002IRSAR operate without an external crystal?

Yes, the MSP430F2002IRSAR can operate entirely without an external crystal. Its integrated digitally controlled oscillator (DCO) is factory-calibrated at four frequencies (1/8/12/16 MHz) with ±1% accuracy, enabling immediate system clocking upon power-up. The DCO supports fast wake-up (<1 µs) from low-power modes and eliminates BOM cost and board space associated with crystals. External 32-kHz crystals or digital clocks remain optional for applications requiring higher timing precision or ultra-low-power real-time clock functionality - but are not required for basic operation of the MSP430F2002IRSAR.