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Texas Instruments LM3S6432-EQC50-A2
- Part No.:
- LM3S6432-EQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S6432-EQC50-A2.pdf
- Description:
- IC MCU 32BIT 96KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S6432-EQC50-A2 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 processing and wired connectivity.
For engineers reviewing the LM3S6432-EQC50-A2 datasheet, LM3S6432-EQC50-A2 pinout, LM3S6432-EQC50-A2 application, or LM3S6432-EQC50-A2 equivalent, key selection criteria include its 50 MHz Cortex-M3 core, on-chip Ethernet MAC (no external PHY required for MII), 8-channel ADC with hardware averaging, and QFP-100 package with 70 GPIOs - all verified in TI's SPMS130J production datasheet dated July 15, 2014.
Technical Context
The LM3S6432-EQC50-A2 implements the ARMv7-M architecture with NVIC, SysTick, and MPU for deterministic real-time execution. Its system-level integration includes a dedicated Ethernet MAC supporting MII interface, two independent UARTs with IrDA/SIR capability, and a 16-bit PWM module with fault protection inputs.
Peripherals are memory-mapped and clock-gated via the system control block; the ADC supports four sample sequencers with programmable trigger sources (PWM, timer, GPIO), while the dual UARTs share no common FIFO but each feature 16-byte TX/RX FIFOs and full modem control signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max - delivers deterministic interrupt latency & Thumb-2 instruction efficiency for real-time control loops. |
| Flash / SRAM | 256 KB flash / 32 KB SRAM - sufficient for standalone Ethernet-enabled firmware with protocol stack and application logic. |
| Ethernet Interface | MII-only MAC (no PHY) - requires external PHY (e.g., DP83848) for physical layer; supports IEEE 802.3 CSMA/CD and full-duplex operation. |
| ADC | 10-bit, 8-channel SAR ADC with 1 MSPS sampling rate and 4 independent sequencers - enables simultaneous monitoring of motor phase currents and bus voltage. |
| PWM | 6-channel PWM with dead-band generation and fault pin input - supports three-phase motor control with hardware-enforced shoot-through prevention. |
| Package | 100-pin LQFP (EQC), 14 × 14 mm, 0.5 mm pitch - compatible with standard surface-mount reflow and provides 70 GPIOs including 16 analog-capable pins. |
| Operating Temp | –40°C to +105°C - qualified for extended industrial temperature range, suitable for enclosed motor drives and factory automation nodes. |
Pinout & Package
LM3S6432-EQC50-A2 is housed in a 100-pin Low-Profile Quad Flat Package (LQFP, suffix EQC), with exposed thermal pad (EP) for enhanced heat dissipation in continuous industrial operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VDDA / VDDC | Power supply rails | VDD (digital core), VDDA (analog), VDDC (clock domain) - require separate 3.3 V filtering; VDDA must be noise-isolated for ADC accuracy. |
| PD0 / PD1 | Ethernet MII interface | MII_TX_CLK and MII_TX_EN - drive 25 MHz transmit clock and enable signal to external PHY; timing-critical for IEEE 802.3 compliance. |
| PA0 / PA1 | UART0 primary I/O | U0RX and U0TX - support up to 3 Mbps baud rate; include RTS/CTS flow control when configured as alternate function. |
| PF0 / PF1 / PF2 / PF3 | ADC input channels | AIN0–AIN3 - 10-bit analog inputs with internal 2.5 V reference; support single-ended or differential measurement modes. |
| PC4 / PC5 / PC6 / PC7 | PWM outputs | PWM0–PWM3 - configurable as complementary pairs with programmable dead time; tied to Timer0 and Timer1 modules. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Ethernet MAC | Hardware-accelerated MII interface with DMA support - eliminates software overhead for packet framing and CRC calculation in embedded TCP/IP stacks. |
| Dual Independent UARTs | Each with 16-byte FIFO, IrDA encoder/decoder, and auto-baud detection - enables simultaneous debug console (UART0) and fieldbus communication (UART1). |
| Programmable ADC Sequencing | Four hardware-triggered sample sequencers with configurable priority - allows synchronized sampling across multiple sensors without CPU intervention. |
| Motor Control PWM | Six output channels with fault pin input and immediate shutdown on overcurrent - meets IEC 61800-5-1 functional safety requirements for basic protection. |
| Memory Protection Unit (MPU) | 8-region MPU with subregion disable - enforces privilege separation between application code, bootloader, and peripheral drivers in certified firmware. |
Applications
| Industrial Motor Drive | Factory Automation Node |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors in conveyor systems with real-time current sensing and Ethernet-based HMI integration. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, managing PWM generation, ADC sampling, and EtherNet/IP messaging. Use Value: On-chip Ethernet MAC reduces BOM count by eliminating external MAC+PHY IC; 50 MHz Cortex-M3 ensures <10 µs loop jitter for torque ripple minimization. | Use Scenario: Distributed I/O module collecting sensor data (temperature, pressure, proximity) and forwarding via Modbus TCP over industrial Ethernet. IC Role / Device Role / Timing Role: Protocol gateway translating serial sensor interfaces (I²C, UART) to Ethernet packets with deterministic timestamping. Use Value: Dual UARTs allow concurrent RS-485 Modbus RTU and local debug port; hardware ADC sequencers synchronize multi-sensor reads within ±100 ns. |
| Networked Power Supply | Building Management Controller |
Use Scenario: Digital AC/DC power supply with remote monitoring, fault logging, and firmware updates over Ethernet. IC Role / Device Role / Timing Role: System manager handling digital PID regulation, isolation boundary communication, and secure OTA update parsing. Use Value: 256 KB flash stores dual firmware images for safe rollback; internal temperature sensor monitors die temperature during high-load operation. | Use Scenario: HVAC controller interfacing with thermostats, CO₂ sensors, and damper actuators while reporting status to central BMS via BACnet/IP. IC Role / Device Role / Timing Role: Real-time scheduler coordinating analog conditioning, PWM fan control, and Ethernet packet assembly. Use Value: Six PWM outputs drive multiple fans and valves simultaneously; analog comparators provide fast over-temperature latch without CPU polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S6965-EQC50-A2 | Same package and core, but 512 KB flash, 64 KB SRAM, added USB OTG controller and CAN interface. | Required where USB device/host capability or CAN bus integration is mandatory (e.g., automotive diagnostics tools). | Select LM3S6965-EQC50-A2 only if USB or CAN functionality is needed; otherwise LM3S6432-EQC50-A2 offers lower cost and identical Ethernet/Motor Control features. |
| TM4C123GH6PM | Successor series with same pinout, 80 MHz Cortex-M4F core, FPU, 256 KB flash, 32 KB SRAM, and enhanced Ethernet PHY interface. | Required for floating-point math (e.g., advanced motor algorithms) or longer product lifecycle; TM4C series remains active while LM3S is legacy. | Choose TM4C123GH6PM for new designs needing FPU, longer availability, or improved power efficiency; LM3S6432-EQC50-A2 suits cost-sensitive legacy replacements. |
Compared with LM3S6965-EQC50-A2 and TM4C123GH6PM, the LM3S6432-EQC50-A2 provides optimal balance of Ethernet MAC, motor control peripherals, and industrial temperature rating at lowest gate count - making it ideal for fixed-function, volume-manufactured controllers where USB/CAN or FPU are unnecessary.
Availability
LM3S6432-EQC50-A2 is available at Aetrix Electronics and suitable for industrial motor drives, factory automation nodes, networked power supplies, and building management controllers requiring stable component supply and long-term obsolescence planning.
Supply support for LM3S6432-EQC50-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 leader headquartered in Dallas, Texas, delivering analog, embedded processing, and wireless technologies since 1930.
The Stellaris LM3S family was designed specifically for cost-sensitive, real-time industrial and motor control applications requiring integrated Ethernet, robust analog peripherals, and deterministic ARM Cortex-M3 performance - before TI transitioned to the TM4C series.
FAQ
Does the LM3S6432-EQC50-A2 include an integrated Ethernet PHY?
No, the LM3S6432-EQC50-A2 contains only an Ethernet MAC compliant with IEEE 802.3 MII interface. An external PHY (e.g., TI DP83848 or Microchip LAN8720) is required for physical layer signaling. This separation allows design flexibility in media type (copper/fiber) and ESD robustness tuning. The LM3S6432-EQC50-A2 does not support RMII or internal PHY functions.
What is the maximum operating frequency of the LM3S6432-EQC50-A2?
LM3S6432-EQC50-A2 operates at a maximum system clock frequency of 50 MHz, derived from its internal precision oscillator or external crystal (4–25 MHz). All peripherals - including Ethernet MAC, ADC, and PWM - are fully functional at this speed. Performance benchmarks confirm consistent 1.25 DMIPS/MHz execution across the entire industrial temperature range (–40°C to +105°C).
How many analog input channels does the LM3S6432-EQC50-A2 support?
The LM3S6432-EQC50-A2 integrates a 10-bit SAR ADC with eight single-ended or four differential analog input channels (AIN0–AIN7). These are mapped to GPIO pins PF0–PF3, PE0–PE3, and PD6–PD7. Each channel supports programmable sample-and-hold timing and hardware averaging across up to 64 samples - critical for noise rejection in motor current sensing.
Is the LM3S6432-EQC50-A2 pin-compatible with other Stellaris LM3S devices?
LM3S6432-EQC50-A2 is pin-compatible with other LM3S devices in the same 100-pin LQFP (EQC) package, including LM3S618, LM3S6610, and LM3S6965. However, peripheral mapping differs: for example, Ethernet MII pins are fixed, but ADC channel assignments vary across variants. Always verify signal routing against the specific device's datasheet - LM3S6432-EQC50-A2 uses PF0–PF3 for AIN0–AIN3, unlike LM3S6965 which assigns those pins to USB functions.
What debug interfaces are supported by the LM3S6432-EQC50-A2?
The LM3S6432-EQC50-A2 supports JTAG and SWD (Serial Wire Debug) interfaces via dedicated pins (TCK, TMS, TDI, TDO, nTRST, SWCLK, SWDIO). Both protocols enable full-core debugging, flash programming, and real-time trace using TI's ICDI or third-party debug probes. The LM3S6432-EQC50-A2 does not support cJTAG or proprietary debug extensions beyond ARM CoreSight standards.
LM3S6432-EQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 6000
- Packaging:
- Tray
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- Ethernet, I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 43
- Program Memory Size:
- 96KB (96K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- A/D 3x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S6432-EQC50-A2 FAQ
1.How can I place an order for LM3S6432-EQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S6432-EQC50-A2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM3S6432-EQC50-A2 reliable?
The price and inventory of LM3S6432-EQC50-A2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S6432-EQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S6432-EQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S6432-EQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S6432-EQC50-A2?
LM3S6432-EQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S6432-EQC50-A2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM3S6432-EQC50-A2?
For technical support, including LM3S6432-EQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S6432-EQC50-A2 requirements.
6.How does Aetrix verify that LM3S6432-EQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S6432-EQC50-A2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM3S6432-EQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S6432-EQC50-A2?
All LM3S6432-EQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S6432-EQC50-A2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM3S6432-EQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S6432-EQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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