Texas Instruments MSP430G2402IPW20R

Overview

MSP430G2402IPW20R from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with 8 KB Flash, 256 B RAM, 16 I/O pins (capacitive-touch enabled), Universal Serial Interface (USI) supporting SPI and I²C, and a 16-bit Timer_A with three capture/compare registers. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and portable instrumentation.

For engineers reviewing the MSP430G2402IPW20R datasheet, MSP430G2402IPW20R pinout, MSP430G2402IPW20R application, or MSP430G2402IPW20R equivalent, key selection criteria include active-mode current (220 µA @ 1 MHz, 2.2 V), standby power (0.5 µA), Spy-Bi-Wire debug interface, TSSOP-20 package compatibility, and absence of integrated ADC10 - distinguishing it from MSP430G2x32 variants.

Technical Context

The MSP430G2402IPW20R 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 32-kHz crystal support - enabling sub-1-µs wake-up from LPM4.

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 enable for capacitive-touch sensing. The USI module provides hardware-level SPI and I²C protocol handling without CPU intervention during transfers.

Key Specifications

Pinout & Package

TSSOP-20 package (7.0 mm × 4.4 mm, 0.65 mm pitch) with exposed thermal pad recommended for soldering to ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2553IPW20R and MSP430FR2111IPW16R, the MSP430G2402IPW20R offers optimal balance of Flash size, USI flexibility, and proven low-power performance in cost-constrained, digital-only embedded control - without ADC overhead or FRAM migration complexity.

Availability

MSP430G2402IPW20R is available at Aetrix Electronics and suitable for smart sensor nodes, industrial HMI panels, and portable medical monitors requiring stable component supply and long-term production continuity.

Supply support for MSP430G2402IPW20R 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 energy efficiency and system integration.

The MSP430G2xx family was designed specifically for ultra-low-power, cost-sensitive embedded applications - prioritizing rapid wake-up, minimal active current, and integrated peripherals to reduce external component count in battery-operated devices.

FAQ

Does the MSP430G2402IPW20R include an integrated analog-to-digital converter (ADC)?

No, the MSP430G2402IPW20R does not include an ADC. It belongs to the MSP430G2x02 series, which omits the ADC10 module present in the MSP430G2x32 series. Pins labeled A0–A7 on the MSP430G2402IPW20R are reserved and not functional as analog inputs. For ADC capability, consider the pin-compatible MSP430G2553IPW20R, which integrates a 10-bit, 8-channel ADC10.

What debug interface does the MSP430G2402IPW20R support?

The MSP430G2402IPW20R supports the Spy-Bi-Wire (SBW) interface - a 2-wire variant of JTAG - using pins RST/NMI/SBWTDIO (Pin 16) and TEST/SBWTCK (Pin 17). This enables full in-system programming, real-time debugging, and flash security fuse management using TI's MSP-FET or compatible debug probes. No external JTAG header is required.

Can the MSP430G2402IPW20R drive capacitive-touch buttons without external components?

Yes, the MSP430G2402IPW20R supports capacitive-touch sensing on up to 16 I/O pins using its integrated pin-oscillator circuitry. Each pin can be configured independently via the PxIES and PxSEL registers to enable oscillation, and touch detection is performed by measuring frequency shift - eliminating the need for external RC networks or dedicated touch controllers in basic HMI applications.

What clock sources are available on the MSP430G2402IPW20R?

The MSP430G2402IPW20R integrates three clock sources: a digitally controlled oscillator (DCO) with factory-calibrated frequencies up to 16 MHz, an internal very-low-power low-frequency (LF) oscillator (~12 kHz), and support for an external 32-kHz crystal connected to XIN/XOUT (Pins 19/18). These feed the ACLK, MCLK, and SMCLK domains, enabling flexible power/performance trade-offs across operating modes.

Is the MSP430G2402IPW20R pin-compatible with other devices in the MSP430G2xx family?

Yes, the MSP430G2402IPW20R in TSSOP-20 package shares identical pinout with other 20-pin MSP430G2xx devices including MSP430G2553IPW20R and MSP430G2232IPW20R. However, peripheral availability differs - for example, ADC10 is absent on MSP430G2402IPW20R but present on MSP430G2553IPW20R. Firmware and layout reuse is possible, but register initialization must account for missing modules.