Texas Instruments LM3S1960-IBZ50-A2T

Overview

LM3S1960-IBZ50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated hibernation module, 8-channel PWM, quadrature encoder interface, and dual UARTs. It operates at 50 MHz, supports -40°C to +85°C industrial temperature range, and targets motor control and embedded automation systems.

For engineers reviewing the LM3S1960-IBZ50-A2T datasheet, LM3S1960-IBZ50-A2T pinout, LM3S1960-IBZ50-A2T application, or LM3S1960-IBZ50-A2T equivalent, key selection criteria include its hibernation-capable RTC, 12-bit ADC with 1MSPS sampling, and hardware-accelerated QEI for precise position feedback in resource-constrained industrial nodes.

Technical Context

The LM3S1960-IBZ50-A2T integrates an ARM Cortex-M3 core with NVIC, SysTick, and MPU, enabling deterministic real-time interrupt handling and memory protection. Its system-level peripherals include a hibernation module with battery-backed RTC and 2 KB SRAM, plus dedicated motor control blocks: QEI, 8-channel PWM with dead-band generation, and analog comparators.

Peripherals are clocked via a flexible PLL-based system clock tree supporting multiple sources (PIOSC, MOSC, HSE). The device uses a 100-pin LQFP package with dedicated GPIO banks mapped to timer capture/compare, UART, SSI, I²C, and ADC channels - all accessible without remapping.

Key Specifications

Pinout & Package

LM3S1960-IBZ50-A2T is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments support full peripheral concurrency: dual UARTs, two SSI ports, I²C, 8 PWM outputs, QEI A/B/Index, 8 ADC inputs, and 64 GPIOs across Port A–G.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123GH6PM and STM32F407VGT6, the LM3S1960-IBZ50-A2T delivers unique value in ultra-low-power industrial sensing and motor control through its integrated hibernation module and hardware QEI - features absent in both alternatives and critical for battery longevity and deterministic position feedback.

Availability

LM3S1960-IBZ50-A2T is available at Aetrix Electronics and suitable for industrial motor drives, programmable logic controllers, smart sensors, and energy monitoring devices requiring stable component supply and long-term lifecycle support.

Supply support for LM3S1960-IBZ50-A2T 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and consumer markets.

The Stellaris LM3S family was designed specifically for cost-sensitive, real-time industrial control applications - integrating motor control peripherals, hibernation capability, and robust analog subsystems into a single ARM Cortex-M3 SoC.

FAQ

What is the maximum operating frequency of the LM3S1960-IBZ50-A2T?

The LM3S1960-IBZ50-A2T operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL. This frequency is specified across the full industrial temperature range (-40°C to +85°C) and supports deterministic real-time execution for motor control loops and communication protocols. The LM3S1960-IBZ50-A2T achieves this performance while maintaining low dynamic power consumption typical of the Stellaris architecture.

Does the LM3S1960-IBZ50-A2T include hardware support for quadrature encoder interfacing?

Yes, the LM3S1960-IBZ50-A2T integrates a dedicated Quadrature Encoder Interface (QEI) peripheral with 32-bit position counter, velocity capture, and index pulse detection. It connects directly to encoder A/B/Index signals on PE0–PE2 and operates independently of the CPU - reducing interrupt load and enabling precise shaft position tracking in motor control applications. The LM3S1960-IBZ50-A2T QEI is fully documented in Section 16 of the official datasheet.

What power-saving features does the LM3S1960-IBZ50-A2T offer for battery-operated systems?

The LM3S1960-IBZ50-A2T includes a dedicated hibernation module with battery-backed RTC, 2 KB hibernate RAM, and wake-on-RTC-match or external pin assertion. In hibernate mode, it draws less than 1.5 µA - enabling multi-year battery life in remote sensor nodes. The LM3S1960-IBZ50-A2T also supports sleep, deep-sleep, and shutdown modes with configurable wake sources including GPIO, timers, and communication peripherals.

Can the LM3S1960-IBZ50-A2T execute code directly from flash memory?

Yes, the LM3S1960-IBZ50-A2T supports XIP (eXecute-In-Place) from its 256 KB on-chip flash memory, eliminating the need to copy firmware to RAM for execution. Flash is organized in 1 KB sectors with individual erase capability and includes error correction circuitry. The LM3S1960-IBZ50-A2T also provides 16 KB of nonvolatile register space for storing calibration data or security keys without consuming main flash.

What development tools are officially supported for the LM3S1960-IBZ50-A2T?

Texas Instruments officially supports the LM3S1960-IBZ50-A2T with Keil MDK-ARM, IAR Embedded Workbench, and TI's Code Composer Studio v6+ using the StellarisWare Peripheral Driver Library. Debugging is enabled via JTAG/SWD using TI XDS100v2 or Segger J-Link probes. The LM3S1960-IBZ50-A2T is compatible with the EK-LM3S811 evaluation kit for rapid prototyping of motor control and sensor applications.