Texas Instruments XMS430G2955IDA38R

Overview

XMS430G2955IDA38R 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 autoscan, USCI_A0 (UART/LIN/IrDA/SPI) and USCI_B0 (SPI/I²C), and up to 56 GPIO pins in a 38-pin TSSOP package. It targets battery-powered sensor nodes and portable measurement systems requiring fast wake-up (<1 µs), brownout detection, and integrated analog signal conditioning.

For engineers reviewing the XMS430G2955IDA38R datasheet, XMS430G2955IDA38R pinout, XMS430G2955IDA38R application, or XMS430G2955IDA38R equivalent, this device supports LIN bus communication via auto-baudrate UART, touch-sense I/O on up to 32 pins, programmable code protection, and Spy-Bi-Wire debugging - all within a 1.8–3.6 V supply range and five low-power modes.

Technical Context

The XMS430G2955IDA38R implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations and high code efficiency. Its basic clock system integrates a digitally controlled oscillator (DCO) calibrated to 1 MHz, 8 MHz, 12 MHz, and 16 MHz, plus LF and HF crystal support (32 kHz and up to 16 MHz).

Peripherals are memory-mapped and accessible via all CPU instructions. The device uses a unified interrupt vector table (0xFFFE–0xFFC0), with maskable interrupts for Timer_A/B, USCI_A0/B0, ADC10, Comparator_A+, and port P1/P2, plus non-maskable sources including NMI, oscillator fault, and power-on reset.

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. Pin-compatible with MSP430G2855IDA38 and MSP430G2755IDA38 in same footprint.

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 XMS430G2955IDA38R provides maximum on-chip memory and I/O count in the DA38 package - critical for feature-rich firmware, multi-sensor integration, and field-upgradable applications without hardware redesign.

Availability

XMS430G2955IDA38R is available at Aetrix Electronics and suitable for wireless sensor nodes, industrial data loggers, smart thermostat interfaces, and portable medical devices requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for XMS430G2955IDA38R 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, reliability, and system-level integration.

The MSP430G2x55 series was designed specifically for ultra-low-power portable measurement and sensing applications - integrating precision analog, robust timing, and flexible communication in a single chip to eliminate discrete support components.

FAQ

What is the maximum operating frequency of the XMS430G2955IDA38R?

The XMS430G2955IDA38R supports an internal digitally controlled oscillator (DCO) calibrated to operate at up to 16 MHz, as confirmed by factory-stored calibration data in information memory segment A. External crystal support includes HF crystals up to 16 MHz and 32-kHz LF crystals. The CPU executes instructions at 62.5-ns intervals at 16 MHz, enabling real-time processing of sensor data without external clock sources.

Does the XMS430G2955IDA38R support LIN bus communication?

Yes, the XMS430G2955IDA38R supports LIN bus communication through its USCI_A0 module, which implements enhanced UART with auto-baudrate detection per LIN specification 2.2A. This allows the XMS430G2955IDA38R to serve as a LIN slave node without external transceiver logic - only a standard LIN physical layer transceiver (e.g., TI SN65HVDA100) is required for bus interfacing.

How many analog input channels does the ADC10 in the XMS430G2955IDA38R support?

The ADC10 in the XMS430G2955IDA38R supports 12 analog input channels (A0–A7, A12–A15), as documented in Table 2 of SLAS800. These channels are accessible via dedicated pins including P2.0–P2.4, P3.5–P3.7, and P4.3–P4.7. The autoscan feature allows sequential conversion across all enabled channels without CPU intervention, reducing firmware overhead in multi-sensor systems.

Is the XMS430G2955IDA38R pin-compatible with other MSP430G2x55 variants in TSSOP packaging?

Yes, the XMS430G2955IDA38R is fully pin-compatible with MSP430G2855IDA38 and MSP430G2755IDA38 in the 38-pin TSSOP (DA) package. All share identical pin functions, electrical characteristics, and thermal profiles. This allows direct substitution in existing PCB layouts when upgrading firmware capacity or I/O count without hardware modification.

What debug interface does the XMS430G2955IDA38R use?

The XMS430G2955IDA38R uses the two-wire Spy-Bi-Wire (SBW) interface for debugging and programming, accessed via pins TEST/SBWTCK (Pin 1) and RST/NMI/SBWTDIO (Pin 6). This eliminates the need for a full 4-wire JTAG connector, reduces PCB footprint, and supports in-system programming without external voltage - aligning with TI's low-cost, low-pin-count design philosophy for the MSP430G2x family.