Texas Instruments LM3S6100-IBZ25-A2

Overview

LM3S6100-IBZ25-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated Ethernet MAC, dual UARTs, SSI, analog comparator, and GPIOs in a 100-pin LQFP package. It operates at up to 50 MHz and supports industrial motor control, networked sensor nodes, and embedded gateway applications.

For engineers reviewing the LM3S6100-IBZ25-A2 datasheet, LM3S6100-IBZ25-A2 pinout, LM3S6100-IBZ25-A2 application, or LM3S6100-IBZ25-A2 equivalent, key selection criteria include Ethernet MAC integration, 50 MHz Cortex-M3 performance, 100-pin LQFP footprint, industrial temperature range (–40°C to +85°C), and StellarisWare software support.

Technical Context

The LM3S6100-IBZ25-A2 implements the ARMv7-M architecture with nested vectored interrupt controller (NVIC), SysTick timer, and memory protection unit (MPU). It integrates a full Ethernet MAC (no external PHY required for MII interface) and supports IEEE 802.3-compliant frame transmission/reception.

Its peripheral set includes two UARTs with IrDA/SIR support, one SSI port, eight general-purpose timers (including RTC mode), and an analog comparator with internal voltage reference. Clock management supports PLL-based system clock generation from 1–25 MHz crystal or external clock input.

Key Specifications

Pinout & Package

LM3S6100-IBZ25-A2 is housed in a 100-pin LQFP package (package code Z25). Pin assignments are defined per TI SPMS107I datasheet Section 14 (Pin Diagram) and Section 15.1 (100-Pin LQFP Package Pin Tables).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM3S6100-IBZ25-A2, LM3S6965-IQC50-A2 adds USB and integrated PHY at the cost of larger package and higher BOM complexity, while TM4C123GH6PM offers pin-compatible upgrade path with CAN and modern toolchain support-but requires software adaptation.

Availability

LM3S6100-IBZ25-A2 is available at Aetrix Electronics and suitable for industrial motor control, networked sensor gateways, and smart building controllers requiring stable component supply and long-lifecycle support.

Supply support for LM3S6100-IBZ25-A2 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, delivering analog, embedded processing, and wireless technologies for industrial, automotive, and consumer markets.

The Stellaris LM3S series was designed specifically for cost-sensitive, real-time embedded applications requiring Ethernet connectivity, deterministic interrupt response, and integrated analog peripherals-targeting industrial automation and networked edge devices.

FAQ

What is the maximum operating frequency of the LM3S6100-IBZ25-A2?

The LM3S6100-IBZ25-A2 operates at a maximum system clock frequency of 50 MHz. This is achieved using the on-chip PLL, which multiplies an external crystal or clock source (1–25 MHz range) to generate the core clock. The Cortex-M3 core executes instructions at this frequency with single-cycle multiplication and hardware divide support.

Does the LM3S6100-IBZ25-A2 include an integrated Ethernet PHY?

No, the LM3S6100-IBZ25-A2 includes only an Ethernet MAC compliant with IEEE 802.3. It requires an external PHY chip (e.g., DP83848) connected via MII interface. The MAC provides full-duplex transmit/receive logic, CRC generation/checking, and flow control-but no physical layer signaling or magnetics.

What development tools support the LM3S6100-IBZ25-A2?

The LM3S6100-IBZ25-A2 is supported by Texas Instruments' Code Composer Studio v5.x (with legacy Stellaris driver support), Keil MDK-ARM v4.x, and IAR Embedded Workbench for ARM. StellarisWare peripheral driver library and example projects are provided free of charge and fully validated for LM3S6100-IBZ25-A2.

Is the LM3S6100-IBZ25-A2 pin-compatible with other LM3S devices?

The LM3S6100-IBZ25-A2 uses a 100-pin LQFP package shared with several LM3S variants (e.g., LM3S6110, LM3S6120), but pin functions differ across models. While package footprint is identical, signal mapping-including Ethernet, UART, and SSI pins-is not guaranteed to match. Always verify pinout against SPMS107I datasheet Section 15.1 before board reuse.

What is the flash endurance and data retention specification for the LM3S6100-IBZ25-A2?

The LM3S6100-IBZ25-A2 flash memory is rated for a minimum of 10,000 erase/write cycles per sector and guarantees data retention of 20 years at 85°C or 40 years at 25°C. Flash sectors are individually erasable (1 KB granularity), and programming is performed in word or byte units under CPU or ROM bootloader control.