Texas Instruments LM3S6432-EQC50-A2T

Overview

LM3S6432-EQC50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated Ethernet MAC, dual UARTs, I²C, SSI, ADC (10-bit, 8-channel), PWM, and analog comparators. It operates at 50 MHz and targets industrial control, motor drive, and networked embedded systems requiring real-time deterministic execution and wired connectivity.

For engineers reviewing the LM3S6432-EQC50-A2T datasheet, LM3S6432-EQC50-A2T pinout, LM3S6432-EQC50-A2T application, or LM3S6432-EQC50-A2T equivalent, key selection criteria include Ethernet MAC integration, 50 MHz Cortex-M3 performance, on-chip flash/SRAM sizing, peripheral mix (e.g., dual UART + I²C + SSI), and QFP-100 package compatibility for industrial PCB layouts.

Technical Context

The LM3S6432-EQC50-A2T implements the ARMv7-M architecture with NVIC-based interrupt handling, SysTick timer, and Memory Protection Unit (MPU) for task isolation. Its system-level interface includes JTAG debugging, SWD support, and vector table relocation capability.

Peripherals are memory-mapped and clock-gated per module: Ethernet MAC uses internal MII interface with PHY management registers; ADC supports hardware averaging and temperature sensor input; PWM subsystem provides independent generator blocks with dead-band control for motor drive timing precision.

Key Specifications

Pinout & Package

LM3S6432-EQC50-A2T is housed in a 100-pin LQFP (Leadless Quad Flat Package) with 0.5 mm pitch, 14 × 14 mm body size, and exposed thermal pad - optimized for industrial thermal dissipation and reflow soldering reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM3S6432-EQC50-A2T, LM3S6965-EQC50-A2T offers scalable memory without peripheral or timing changes, while TM4C123GH6PM delivers architectural upgrades (FPU, CAN) at the cost of software migration effort and non-identical register mapping.

Availability

LM3S6432-EQC50-A2T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, networked motor drive controllers, and building automation gateways requiring stable component supply across extended production lifecycles.

Supply support for LM3S6432-EQC50-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, delivering analog, embedded processing, and wireless technologies since 1930.

The Stellaris LM3S series was designed specifically for cost-sensitive, real-time industrial and building automation applications where Ethernet connectivity, deterministic interrupt response, and integrated analog/motor control peripherals are essential.

FAQ

What is the maximum operating frequency of the LM3S6432-EQC50-A2T?

The LM3S6432-EQC50-A2T operates at a maximum system clock frequency of 50 MHz. This speed is achieved using the internal PLL with an external crystal or oscillator input, and it defines the upper bound for instruction execution, peripheral timing, and real-time control loop bandwidth. The LM3S6432-EQC50-A2T maintains this frequency across its specified industrial temperature range (–40°C to +105°C) when powered within nominal voltage limits.

Does the LM3S6432-EQC50-A2T include an integrated Ethernet MAC?

Yes, the LM3S6432-EQC50-A2T integrates a full IEEE 802.3-compliant Ethernet MAC with MII interface signals routed to dedicated GPIO pins (Port H). It does not include a PHY; an external 10/100BASE-TX PHY is required. The LM3S6432-EQC50-A2T provides all MAC-layer registers, DMA-capable packet buffering, and PHY management (MDIO/MDC) control - enabling complete Ethernet protocol stack implementation in firmware.

What analog peripherals are available on the LM3S6432-EQC50-A2T?

The LM3S6432-EQC50-A2T includes a 10-bit, 8-channel SAR ADC with hardware sample averaging (up to 64x), an internal temperature sensor channel, and two analog comparators with programmable reference inputs. These peripherals are accessible via dedicated analog-capable pins (e.g., PF0–PF3) and support simultaneous sampling triggers from PWM or timer events - making the LM3S6432-EQC50-A2T suitable for closed-loop analog monitoring and control without external signal conditioning ICs.

Is the LM3S6432-EQC50-A2T pin-compatible with other Stellaris LM3S devices?

The LM3S6432-EQC50-A2T uses a 100-pin LQFP package with a specific pin assignment defined in its datasheet. While some LM3S family members share the same package outline (e.g., LM3S6965-EQC50-A2T), pin compatibility is not guaranteed across variants due to differences in peripheral mapping and signal allocation. Engineers must verify pin function alignment using the LM3S6432-EQC50-A2T-specific pinout table - the LM3S6432-EQC50-A2T does not support blind substitution with other LM3S parts without board-level validation.

What debug interfaces does the LM3S6432-EQC50-A2T support?

The LM3S6432-EQC50-A2T supports both JTAG and Serial Wire Debug (SWD) interfaces for programming and real-time debugging. JTAG uses TCK, TMS, TDI, TDO, and nTRST pins; SWD uses SWCLK and SWDIO on shared JTAG pins. Both interfaces provide full NVIC visibility, hardware breakpoints, watchpoints, and memory inspection - essential for developing deterministic real-time applications. The LM3S6432-EQC50-A2T's debug infrastructure is fully supported by TI's Code Composer Studio and third-party ARM tools.