Texas Instruments MSP430G2955IDA38R

Overview

MSP430G2955IDA38R from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller featuring 56 kB flash, 4 kB RAM, dual 16-bit Timer_A modules (TA0/TA1), one 16-bit Timer_B (TB0), 12-channel 10-bit ADC with internal reference and autoscan, USCI_A0 (UART/LIN/IrDA/SPI) and USCI_B0 (SPI/I²C), and up to 56 GPIO pins including touch-sense capability. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and portable instrumentation.

For engineers reviewing the MSP430G2955IDA38R datasheet, MSP430G2955IDA38R pinout, MSP430G2955IDA38R application, or MSP430G2955IDA38R equivalent, key selection criteria include its 56 kB flash capacity, 38-pin TSSOP (DA) package with verified 56 I/O mapping, LIN-capable UART for automotive diagnostics, integrated comparator for slope A/D conversion, and sub-1 µs wake-up from 0.7 µA standby mode.

Technical Context

The MSP430G2955IDA38R implements a 16-bit RISC CPU with 62.5-ns instruction cycle time, constant generators, and seven addressing modes. Its basic clock system supports multiple sources: internal DCO (calibrated at 1/8/12/16 MHz), 32-kHz crystal (ACLK), HF crystal up to 16 MHz, and external digital clock - all configurable via software-controlled clock registers.

Peripheral integration includes two independent 16-bit Timer_A modules (each with three capture/compare registers), one 16-bit Timer_B (three CC registers), a programmable on-chip comparator (COMP_A+) supporting analog signal compare or slope A/D, and dual USCI modules enabling simultaneous UART/IrDA/LIN and SPI/I²C communication on shared pins with multiplexed function control.

Key Specifications

Pinout & Package

Package: 38-pin Thin Shrink Small Outline Package (TSSOP), DA suffix, 0.65 mm pitch, body size 12.5 × 6.1 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2855IDA38 and MSP430G2755IDA38, the MSP430G2955IDA38R provides the highest flash density (56 kB) and I/O count (56) in the G2x55 TSSOP family, enabling richer firmware features, larger configuration tables, and expanded sensor interfacing - without increasing power consumption or compromising ultra-fast wake-up.

Availability

MSP430G2955IDA38R is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical devices, and automotive diagnostic tools requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for MSP430G2955IDA38R 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 emphasis on energy efficiency, reliability, and system-level integration.

The MSP430G2x55 series was designed specifically for ultra-low-power, cost-sensitive mixed-signal applications - integrating precision analog, robust communication, and intelligent timing in a single chip for battery-operated measurement systems.

FAQ

What is the maximum operating frequency of the MSP430G2955IDA38R?

The MSP430G2955IDA38R supports an internal digitally controlled oscillator (DCO) calibrated at 1 MHz, 8 MHz, 12 MHz, and 16 MHz. When using an external HF crystal, it operates up to 16 MHz. The DCO achieves stable operation within 1 µs, enabling rapid transitions from low-power modes to full-speed execution - essential for burst-mode sensor sampling in the MSP430G2955IDA38R.

Does the MSP430G2955IDA38R support LIN communication natively?

Yes, the MSP430G2955IDA38R's USCI_A0 module includes hardware-assisted LIN functionality, including auto-baudrate detection compliant with LIN 2.2 specifications. This allows direct connection to LIN bus transceivers without software bit-banging - reducing CPU load and ensuring timing accuracy in automotive diagnostic implementations using the MSP430G2955IDA38R.

How many ADC channels does the MSP430G2955IDA38R support, and what reference options are available?

The MSP430G2955IDA38R integrates a 10-bit ADC10 with 12 selectable analog input channels (A0–A7, A12–A15). It supports internal 1.5 V and 2.5 V references, external VREF+/VREF−, and VEREF+/VEREF− inputs. Calibration data for gain and offset is factory-stored in information memory segment A - ensuring consistent accuracy across temperature for precision measurements in the MSP430G2955IDA38R.

Can the MSP430G2955IDA38R perform touch-sense functions without external components?

Yes, the MSP430G2955IDA38R supports capacitive touch sensing on up to 32 GPIO pins using its integrated pin oscillator and built-in comparator. No external RC network or dedicated touch controller is required - enabling direct implementation of sliders, wheels, and buttons with minimal BOM impact in human-interface applications based on the MSP430G2955IDA38R.

What debug interface does the MSP430G2955IDA38R use, and is JTAG required?

The MSP430G2955IDA38R uses Spy-Bi-Wire (SBW), a 2-wire debug interface compatible with TI's MSP-FET and LaunchPad debuggers. It requires only TEST/SBWTCK (Pin 1) and RST/NMI/SBWTDIO (Pin 6) - eliminating the need for full 4-wire JTAG. This reduces PCB footprint and simplifies debug connector design while maintaining full flash programming and real-time emulation capability for the MSP430G2955IDA38R.