Texas Instruments LM3S6100-EQC25-A2

Overview

LM3S6100-EQC25-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated Ethernet MAC, dual UARTs, SSI, analog comparator, and 100-pin LQFP package. It operates at up to 50 MHz and supports industrial motor control and networked embedded systems.

For engineers reviewing the LM3S6100-EQC25-A2 datasheet, LM3S6100-EQC25-A2 pinout, LM3S6100-EQC25-A2 application, or LM3S6100-EQC25-A2 equivalent, this page delivers verified specifications, package mapping, functional context, and real-world use cases for deterministic selection in Ethernet-connected MCU designs.

Technical Context

The LM3S6100-EQC25-A2 integrates an ARM Cortex-M3 core with Harvard bus architecture, nested vectored interrupt controller (NVIC), and memory protection unit (MPU). It features a dedicated Ethernet MAC supporting 10/100 Mbps MII interface and internal PHY support via external transceiver.

Peripherals include two UARTs with FIFO and IrDA/SIR capability, one SSI port compatible with SPI/Microwire, a 4-channel analog comparator with programmable reference, and general-purpose timers with RTC, PWM, and input capture modes - all clocked from a configurable PLL-based system clock.

Key Specifications

Pinout & Package

LM3S6100-EQC25-A2 is housed in a 100-pin LQFP package with exposed thermal pad. Pin assignments follow TI's standardized signal mapping for Stellaris LM3S series, supporting multiplexed GPIO, peripheral functions, and dedicated power/ground distribution.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM3S6965-EQC25-A2 and TM4C123GH6PM, the LM3S6100-EQC25-A2 provides optimal balance of Ethernet MAC functionality, deterministic real-time performance, and minimal BOM for industrial gateways-without unnecessary USB or floating-point overhead.

Availability

LM3S6100-EQC25-A2 is available at Aetrix Electronics and suitable for industrial Ethernet gateways, motor control nodes, networked sensor aggregators, and building automation controllers requiring stable component supply across long-lifecycle production programs.

Supply support for LM3S6100-EQC25-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, specializing in analog, embedded processing, and wireless technologies since 1930.

The Stellaris LM3S family was designed specifically for cost-sensitive, real-time embedded applications requiring integrated connectivity-especially Ethernet-enabled industrial control, motor drives, and intelligent sensor nodes.

FAQ

What is the maximum operating frequency of the LM3S6100-EQC25-A2?

The LM3S6100-EQC25-A2 operates at a maximum system clock frequency of 50 MHz. This is achieved using an internal PLL that multiplies the input crystal or oscillator frequency. The ARM Cortex-M3 core executes instructions at this rate, enabling deterministic real-time response for Ethernet packet handling and motor control loops. All timing-critical peripherals-including UARTs, SSI, and timers-are synchronized to this clock domain.

Does the LM3S6100-EQC25-A2 include an integrated Ethernet PHY?

No, the LM3S6100-EQC25-A2 includes only an Ethernet MAC with MII interface. It requires an external PHY chip (e.g., DP83848 or LAN8720) for physical layer signaling. The MII interface provides all necessary control and data signals (RXD[3:0], TXD[3:0], TXEN, RXDV, CRS, COL) and supports both 10 Mbps and 100 Mbps operation. This separation allows design flexibility in PHY selection and ESD protection strategy.

How many UART interfaces does the LM3S6100-EQC25-A2 support?

The LM3S6100-EQC25-A2 supports two independent UART peripherals (UART0 and UART1). Each includes 16-byte transmit and receive FIFOs, programmable baud-rate generation, hardware flow control (RTS/CTS), and IrDA/SIR modulation capability. These UARTs can operate simultaneously-for example, one for debug console output and the other for Modbus RTU communication-without resource contention or software arbitration.

What type of memory is included on the LM3S6100-EQC25-A2?

The LM3S6100-EQC25-A2 integrates 256 KB of on-chip flash memory for program storage and 32 KB of on-chip SRAM for data and stack operations. Flash supports in-system programming and has EEPROM emulation capability via software libraries. SRAM is single-cycle accessible and supports bit-band aliasing for atomic peripheral register access. Both memories are mapped into the Cortex-M3 unified memory space with MPU-enforced protection zones.

Is the LM3S6100-EQC25-A2 pin-compatible with other Stellaris LM3S devices?

The LM3S6100-EQC25-A2 uses a 100-pin LQFP package with pin assignments aligned to the LM3S6000–LM3S6965 family's 100-pin variant. However, it is not fully pin-compatible with all members-specifically, devices with USB or different peripheral sets may assign alternate functions to shared pins. Always verify signal mapping against the LM3S6100-EQC25-A2-specific pin tables in the official datasheet before board reuse.