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Texas Instruments LM3S2911-IQC50-A2
- Part No.:
- LM3S2911-IQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2911-IQC50-A2.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,672
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Product details
Overview
LM3S2911-IQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated CAN 2.0A/B controller, hibernation module with RTC and battery-backed memory, and operates at up to 50 MHz. It targets industrial motor control and embedded automation where deterministic real-time response, low-power hibernation, and robust fieldbus connectivity are required.
For engineers reviewing the LM3S2911-IQC50-A2 datasheet, LM3S2911-IQC50-A2 pinout, LM3S2911-IQC50-A2 application, or LM3S2911-IQC50-A2 equivalent, key selection criteria include its 50 MHz CPU clock, CAN interface compliance, hibernation current (≤1.7 µA), 12-bit ADC resolution, and QFP-100 package compatibility with industrial PCB layouts.
Technical Context
The LM3S2911-IQC50-A2 implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC with 64 interrupt lines, and SysTick timer. It integrates a dedicated hibernation module supporting RTC wake-up, battery-backed 2 KB SRAM, and deep-sleep entry via GPIO or RTC match.
Peripherals include one CAN 2.0A/B controller with 32 message objects, two UARTs with IrDA/SIR support, two SSI interfaces, one I²C master/slave, eight PWM-capable GPTM channels, and a 12-bit 1-MSPS ADC with 12 input channels - all clocked from a programmable PLL-based system clock.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, supports Thumb-2 for code density and performance efficiency |
| Max Clock Speed | 50 MHz - enables real-time motor control loop execution within sub-100 µs latency budgets |
| Flash / RAM | 256 KB flash (in-system programmable) + 64 KB SRAM - sufficient for bootloader, application, and data buffers |
| CAN Interface | One CAN 2.0A/B controller with 32 message objects - supports industrial fieldbus communication without external transceiver logic |
| Hibernation Current | ≤1.7 µA with RTC active - enables multi-year battery operation in remote sensor nodes |
| ADC | 12-bit, 1-MSPS, 12-channel - suitable for precision analog feedback in motor phase current sensing |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard industrial reflow profiles and manual inspection |
Pinout & Package
LM3S2911-IQC50-A2 is housed in a 100-pin Low-Profile Quad Flat Package (LQFP) with exposed thermal pad, rated for industrial temperature range (–40°C to +85°C) and RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VDDA / VDDC | Power supply inputs | Digital (3.3 V), analog (3.3 V), and core (1.2 V) rails - require separate decoupling per power domain |
| GND / GNDA / GNDC | Ground returns | Analog, digital, and core ground planes must be partitioned and joined at single point near regulator |
| PD0 / PD1 | CAN0RX / CAN0TX | Dedicated differential CAN bus interface pins - require external CAN transceiver (e.g., SN65HVD230) |
| PA0–PA7 | SSI0 / UART0 / I²C0 / GPIO | Multiplexed peripheral pins - configured via GPIO AFSEL and PCTL registers at runtime |
| HIBERNATE | Hibernate module enable | Active-low signal controlling hibernation entry/exit - tied high via pull-up when not used |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Integrated RTC, battery-backed 2 KB SRAM, and wake-on-RTC-match or GPIO - eliminates need for external RTC IC and backup power management |
| CAN 2.0A/B Controller | 32 message object RAM with mask-based filtering - enables concurrent handling of multiple CAN IDs without CPU polling overhead |
| Peripheral Integration | UART, SSI, I²C, PWM, ADC, analog comparators, and watchdog on-chip - reduces BOM count and board space vs discrete solutions |
| Memory Protection Unit (MPU) | Configurable region-based access control - supports safe multitasking and firmware partitioning in safety-critical applications |
| Debug Interface | SWD/JTAG with TPIU trace port - enables real-time instruction tracing and non-intrusive debugging during motor control loop validation |
Applications
| Industrial Motor Control | Building Automation Node |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC compressors with field-oriented control (FOC) algorithms. IC Role / Device Role / Timing Role: Real-time execution host for FOC computation, PWM generation, current sensing ADC sampling, and CAN-based command/response messaging. Use Value: 50 MHz Cortex-M3 delivers <10 µs interrupt latency; integrated hibernation enables standby mode with <2 µA draw during off-cycle periods. | Use Scenario: Distributed sensor node collecting temperature, humidity, and occupancy data in commercial buildings. IC Role / Device Role / Timing Role: Sensor interface aggregator, local decision engine, and CAN bus endpoint for BAS integration. Use Value: On-chip 12-bit ADC supports direct connection to analog sensors; hibernation + RTC allows scheduled wake-up every 15 minutes for low-duty-cycle reporting. |
| Remote Industrial I/O Module | Energy Meter Communication Hub |
Use Scenario: DIN-rail mounted I/O module converting 4–20 mA analog inputs and dry-contact status into CAN messages. IC Role / Device Role / Timing Role: Signal conditioning controller, protocol translator, and CAN network interface with error recovery. Use Value: Dedicated CAN controller handles bit timing, arbitration, and error frames autonomously; 64 KB SRAM buffers burst data during transient CAN bus faults. | Use Scenario: Smart meter gateway aggregating pulse outputs from mechanical meters and forwarding via CAN to concentrator units. IC Role / Device Role / Timing Role: Pulse counting engine, time-stamped event logger, and CAN message formatter with CRC protection. Use Value: General-purpose timers support precise pulse-width measurement; hibernation module maintains accurate timekeeping during main power loss using coin-cell backup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S2678-IQC50-A2 | Same core, package, and speed grade but lacks hibernation module and has only 128 KB flash | Suitable for cost-sensitive motor control where RTC/battery-backup is unnecessary | Select when hibernation and extended flash are not required; lower BOM cost |
| TMS570LS0432ZWTQ | ARM Cortex-R4F, 160 MHz, dual-core lockstep, ISO 26262 ASIL-B ready, no hibernation module | Targeted at automotive safety-critical systems requiring functional safety certification | Choose only when ASIL-B compliance and hardware redundancy are mandatory |
Compared with LM3S2911-IQC50-A2, LM3S2678-IQC50-A2 reduces flash and omits hibernation for cost savings, while TMS570LS0432ZWTQ trades hibernation capability for safety-certified dual-core architecture - making LM3S2911-IQC50-A2 optimal for industrial applications needing low-power autonomy without safety certification overhead.
Availability
LM3S2911-IQC50-A2 is available at Aetrix Electronics and suitable for industrial motor control, building automation nodes, remote I/O modules, and energy meter communication hubs requiring stable component supply across long-lifecycle production programs.
Supply support for LM3S2911-IQC50-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 specializing in analog, embedded processing, and connectivity technologies, with decades of industrial and automotive design-in experience.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time industrial control applications requiring integrated peripherals, low-power hibernation, and fieldbus connectivity - before TI's transition to the TM4C123x family.
FAQ
What is the operating temperature range for LM3S2911-IQC50-A2?
The LM3S2911-IQC50-A2 is specified for industrial temperature operation from –40°C to +85°C. This range is validated across all core functions including flash programming, CAN communication, hibernation mode, and ADC accuracy. The device uses internal temperature compensation for the RC oscillator and supports external crystal reference for higher timing stability. All electrical characteristics in the SPMS057I datasheet apply within this range.
Does LM3S2911-IQC50-A2 support in-application programming (IAP) of flash memory?
Yes, the LM3S2911-IQC50-A2 supports full in-application programming of its 256 KB flash memory via the Flash API in StellarisWare. Code can erase and reprogram flash sectors while executing from SRAM, enabling firmware updates over CAN or UART without external programmer. The flash controller includes write protection, erase suspend/resume, and error detection - all accessible through documented ROM-based APIs to ensure reliability.
How does the hibernation module in LM3S2911-IQC50-A2 function during power loss?
During main power loss, the LM3S2911-IQC50-A2 hibernation module switches to an external coin-cell or supercapacitor via the HIB pin, maintaining RTC timekeeping and preserving 2 KB of battery-backed SRAM. Wake-up sources include RTC alarm, external GPIO edge, or HIB pin assertion. The module draws ≤1.7 µA in hibernate mode, and retains register state - allowing immediate resumption of operation upon power restoration without full reinitialization.
Is LM3S2911-IQC50-A2 pin-compatible with other LM3S devices in the same package?
No, LM3S2911-IQC50-A2 is not fully pin-compatible with other LM3S devices in the 100-pin LQFP package. While shared power, ground, and JTAG pins align, peripheral pin mappings (e.g., CAN0RX/TX, SSI, UART) differ across variants due to internal routing constraints. Pin compatibility must be verified per device-specific datasheet tables - for example, LM3S2678 uses different GPIO assignments for CAN signals than LM3S2911-IQC50-A2.
What debug interfaces does LM3S2911-IQC50-A2 support?
The LM3S2911-IQC50-A2 supports both JTAG and Serial Wire Debug (SWD) interfaces via dedicated pins (TCK, TMS, TDI, TDO, SWDIO, SWCLK). It includes an embedded Trace Port Interface Unit (TPIU) for real-time instruction trace, and full NVIC-integrated debugging with breakpoints, watchpoints, and memory access monitoring. TI's ICDI-based debuggers (e.g., Stellaris LaunchPad) and third-party tools like Segger J-Link are fully supported for development and field diagnostics of LM3S2911-IQC50-A2.
LM3S2911-IQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- Packaging:
- Bulk
- Product Status:
- Not For New Designs
- Programmable:
- Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- CANbus, I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 60
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S2911-IQC50-A2 FAQ
1.How can I place an order for LM3S2911-IQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2911-IQC50-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 LM3S2911-IQC50-A2 reliable?
The price and inventory of LM3S2911-IQC50-A2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S2911-IQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S2911-IQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2911-IQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2911-IQC50-A2?
LM3S2911-IQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2911-IQC50-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 LM3S2911-IQC50-A2?
For technical support, including LM3S2911-IQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2911-IQC50-A2 requirements.
6.How does Aetrix verify that LM3S2911-IQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S2911-IQC50-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 LM3S2911-IQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S2911-IQC50-A2?
All LM3S2911-IQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2911-IQC50-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 LM3S2911-IQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S2911-IQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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