Texas Instruments LM3S2616-IQR50-A0T

Overview

LM3S2616-IQR50-A0T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated CAN 2.0A/B controller, 12-bit 1-MSPS ADC (8-channel), and dual UARTs. It operates at 50 MHz, supports hibernation mode with RTC and battery-backed memory, and targets industrial motor control and embedded automation systems.

For engineers reviewing the LM3S2616-IQR50-A0T datasheet, LM3S2616-IQR50-A0T pinout, LM3S2616-IQR50-A0T application, or LM3S2616-IQR50-A0T equivalent, key selection criteria include CAN interface support, hibernation power management, analog acquisition capability, and Cortex-M3 debug infrastructure including SWD/JTAG and TPIU trace.

Technical Context

The LM3S2616-IQR50-A0T implements the ARMv7-M architecture with NVIC, SysTick, MPU, and integrated TPIU for real-time trace. Its system-level design includes a dedicated hibernation module with external wake-up pins, battery-backed RAM, and RTC match interrupt generation independent of main power domain.

Peripherals are clock-gated and configurable via the system control block; the μDMA controller supports 32-channel arbitration across UART, CAN, ADC, and GPIO, enabling zero-CPU-overhead data movement. The CAN module complies fully with ISO 11898-1 and supports both standard and extended identifiers with programmable message objects.

Key Specifications

Pinout & Package

LM3S2616-IQR50-A0T is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per TI SPMS047H datasheet Section 9 (GPIO) and Section 15 (CAN), with dedicated CANH/CANL pins assigned to PF0/PF1 and alternate mapping on PB4/PB5.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123GH6PM and STM32F103VET6, the LM3S2616-IQR50-A0T uniquely delivers hibernation-mode RTC with battery-backed RAM and full TPIU trace in a mature, production-qualified Cortex-M3 platform - making it optimal for field-deployed industrial nodes requiring guaranteed timekeeping and debug fidelity under intermittent power.

Availability

LM3S2616-IQR50-A0T is available at Aetrix Electronics and suitable for industrial motor control, building automation, energy metering gateways, and PLC I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for LM3S2616-IQR50-A0T 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 wireless technologies with over 90 years of innovation in industrial and automotive electronics.

The Stellaris LM3S family was designed specifically for cost-sensitive, real-time industrial control applications requiring integrated CAN, precise analog acquisition, and ultra-low-power hibernation - before the Tiva C series succeeded it.

FAQ

What is the maximum operating frequency of the LM3S2616-IQR50-A0T?

The LM3S2616-IQR50-A0T operates at a maximum system clock frequency of 50 MHz, derived from an internal PLL that accepts a 1–25 MHz crystal or external clock source. This frequency is specified across the full industrial temperature range (–40°C to +105°C) and supports deterministic real-time execution with sub-microsecond interrupt response times. The LM3S2616-IQR50-A0T achieves this performance while maintaining low dynamic power consumption through adaptive clock gating and voltage scaling.

Does the LM3S2616-IQR50-A0T support CAN FD?

No, the LM3S2616-IQR50-A0T implements a CAN 2.0A/B controller compliant with ISO 11898-1:2003 and does not support CAN FD features such as flexible data-rate or extended payload length. It supports standard (11-bit) and extended (29-bit) identifier formats, programmable bit timing, and 32 hardware message objects with masking and filtering. The LM3S2616-IQR50-A0T is intended for classical CAN networks in industrial automation where FD bandwidth is not required.

What debug interfaces are available on the LM3S2616-IQR50-A0T?

The LM3S2616-IQR50-A0T supports JTAG and Serial Wire Debug (SWD) interfaces for programming and real-time debugging, plus a Trace Port Interface Unit (TPIU) for instruction trace output. These interfaces enable non-intrusive breakpoints, watchpoint monitoring, and full program flow visibility without halting execution. The LM3S2616-IQR50-A0T integrates these capabilities directly into the Cortex-M3 core, eliminating the need for external trace probes in most development scenarios.

How much battery-backed memory does the LM3S2616-IQR50-A0T provide in hibernation mode?

The LM3S2616-IQR50-A0T provides 2 KB of battery-backed SRAM accessible during hibernation mode, retaining critical data such as calibration constants, fault logs, or RTC alarm settings while main power is removed. This memory is mapped to a fixed address range and remains readable/writable via the hibernation module's register interface. The LM3S2616-IQR50-A0T also includes a dedicated 32-bit RTC counter and match comparator to generate wake-up events without CPU involvement.

Is the LM3S2616-IQR50-A0T pin-compatible with other Stellaris LM3S devices?

The LM3S2616-IQR50-A0T uses a 100-pin LQFP package with a unique pin assignment optimized for its peripheral set, including dedicated CANH/CANL on PF0/PF1 and hibernation wake-up on PK0/PK1. It is not pin-compatible with other LM3S variants such as LM3S811 or LM3S3748 due to differing peripheral mappings and power domain configurations. Migration to newer Tiva C devices like TM4C123GH6PM offers pin compatibility but requires firmware adaptation for hibernation and trace features absent in the successor.