Texas Instruments MSP430G2101IPW14R

Overview

MSP430G2101IPW14R from Texas Instruments is an ultralow-power 16-bit RISC mixed-signal microcontroller with 1 kB Flash, 128 B RAM, 10 I/O pins, Timer_A2 with two capture/compare registers, and support for 1.8–3.6 V operation. It features brownout detection, five power-saving modes, and Spy-Bi-Wire on-chip emulation-designed for battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430G2101IPW14R datasheet, MSP430G2101IPW14R pinout, MSP430G2101IPW14R application, or MSP430G2101IPW14R equivalent, key selection criteria include active-mode current at 1 MHz (220 µA @ 2.2 V), LPM4 retention current (0.1 µA), 14-pin TSSOP package compatibility, and absence of integrated analog comparator-distinguishing it from MSP430G2111 variants.

Technical Context

The MSP430G2101IPW14R implements a 16-bit CPU with constant generators and seven addressing modes, executing register-to-register instructions in one MCLK cycle. Its clock system integrates a digitally controlled oscillator (DCO) calibrated to 1 MHz, internal low-frequency oscillator (VLO), and external 32-kHz crystal support-enabling sub-1-µs wake-up from LPM4.

It uses a single 8-bit port P1 (8 I/O) plus two bits on P2, all with individually configurable pullup/pulldown resistors, interrupt edge select, and port-level interrupt flags. The Timer_A2 module supports PWM generation, interval timing, and capture functions using TACLK, ACLK, or SMCLK as sources-without comparator input routing.

Key Specifications

Pinout & Package

Package: 14-pin Plastic Small-Outline Thin (TSSOP), PW suffix, body size 5.0 mm × 4.4 mm, 0.65 mm pitch. RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with MSP430G2111IPW14R, the MSP430G2101IPW14R omits the analog comparator but retains identical power, timing, and I/O capabilities-making it optimal for purely digital control tasks. Against MSP430G2001IPW14R, it doubles Flash capacity for field-upgradable firmware while maintaining identical footprint and supply requirements.

Availability

MSP430G2101IPW14R is available at Aetrix Electronics and suitable for smart utility meter sensor nodes, wireless temperature transmitters, industrial pushbutton interface modules, and portable gas detectors requiring stable component supply across multi-year production cycles.

Supply support for MSP430G2101IPW14R 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 decades of investment in low-power microcontroller innovation.

The MSP430G2xx family was designed specifically for ultralow-power sensing and measurement applications-emphasizing extended battery life, robust analog integration, and streamlined development for cost-sensitive industrial and consumer endpoints.

FAQ

What is the maximum operating frequency of the MSP430G2101IPW14R?

The MSP430G2101IPW14R supports a maximum MCLK frequency of 16 MHz at VCC ≥ 3.3 V, 12 MHz at VCC = 2.7 V, and 6 MHz at VCC = 1.8 V. Its factory-calibrated DCO is tuned to 1 MHz, but software can adjust it across the full range using CALDCO_1MHZ and CALBC1_1MHZ constants stored in Flash information memory segment A. The MSP430G2101IPW14R does not require external crystal for basic operation.

Does the MSP430G2101IPW14R include an analog comparator?

No, the MSP430G2101IPW14R does not include the Comparator_A+ module. That feature is present only in the MSP430G2111 and MSP430G2211 variants. The MSP430G2101IPW14R retains Timer_A2, brownout detection, and Spy-Bi-Wire debug-but lacks CA0–CA7 inputs and CAOUT output. This simplifies analog design for purely digital control applications.

What debug interface does the MSP430G2101IPW14R support?

The MSP430G2101IPW14R supports Spy-Bi-Wire (SBW), a two-wire debug interface using pins RST/NMI/SBWTDIO (pin 10) and TEST/SBWTCK (pin 11). It is fully compatible with TI's MSP-FET and LaunchPad development tools. Unlike full JTAG, SBW requires no TDI/TDO/TMS signals-reducing PCB routing complexity and test point count. The MSP430G2101IPW14R does not support standard 4-wire JTAG.

How much Flash memory does the MSP430G2101IPW14R have, and is it field-programmable?

The MSP430G2101IPW14R contains 1 kB of Flash memory organized in 512-byte segments, fully programmable in-system via Spy-Bi-Wire or JTAG. It supports byte- and word-level writes, segment erasure, and lock-bit protection. Calibration data resides in protected Flash segment A (010FFh–01000h) and remains intact unless explicitly unlocked and erased. The MSP430G2101IPW14R enables firmware updates without removing the device from the PCB.

What are the key differences between MSP430G2101IPW14R and MSP430G2201IPW14R?

The MSP430G2201IPW14R has 2 kB Flash (vs. 1 kB), identical 128 B RAM, same 14-pin TSSOP package, and identical peripherals-including Timer_A2, brownout detector, and Spy-Bi-Wire. Both lack the analog comparator. The MSP430G2201IPW14R is selected when larger firmware images (e.g., enhanced communication stacks or cryptographic libraries) are required, with no hardware or layout changes needed to upgrade from MSP430G2101IPW14R.