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Texas Instruments LM3S2911-IBZ50-A2T
- Part No.:
- LM3S2911-IBZ50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 108-LFBGA
- Datasheet:
-
LM3S2911-IBZ50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 108BGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S2911-IBZ50-A2T from Texas Instruments is an ARM Cortex-M3-based 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 systems requiring deterministic real-time response and low-power hibernation.
For engineers reviewing the LM3S2911-IBZ50-A2T datasheet, LM3S2911-IBZ50-A2T pinout, LM3S2911-IBZ50-A2T application, or LM3S2911-IBZ50-A2T equivalent, key selection criteria include its 50 MHz CPU clock, on-chip CAN interface, hibernation current of 1.7 µA, 12-bit ADC with 1 MSPS sampling rate, and QFP-100 package compatibility with legacy Stellaris designs.
Technical Context
The LM3S2911-IBZ50-A2T implements the ARMv7-M architecture with Thumb-2 instruction set, NVIC supporting 64 interrupt lines, and tightly coupled memory subsystem enabling sub-10-cycle interrupt latency. Its system-level peripherals include a hibernation module with dedicated 32.768 kHz RTC oscillator input, battery-backed 2 KB RAM, and wake-up capability via GPIO, CAN, or RTC match.
Peripherals are memory-mapped and accessible via AHB/APB bridges. The CAN module supports full CAN 2.0A/B protocol with 32 message objects, programmable bit timing, and hardware acceptance filtering. Analog functions include a 12-bit, 12-channel ADC with sequencer and sample-and-hold, plus two analog comparators with internal reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, executes Thumb-2 instructions with single-cycle 32-bit multiply |
| Max Clock Speed | 50 MHz - enables real-time control loops with ≤20 ns instruction cycle time |
| Flash Memory | 256 KB - sufficient for dual-bank firmware updates and bootloader + application partitioning |
| SRAM | 64 KB - supports large data buffers, stack depth for nested interrupts, and RTOS heap |
| CAN Interface | One CAN 2.0A/B controller with 32 message objects - handles multi-node industrial bus traffic without host CPU overhead |
| Hibernate Current | 1.7 µA - allows battery-powered operation for >1 year on CR2032 when using hibernation mode |
| ADC | 12-bit, 12-channel, 1 MSPS - captures fast transients in motor phase current sensing or power supply monitoring |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard surface-mount reflow and manual inspection |
Pinout & Package
LM3S2911-IBZ50-A2T is housed in a 100-pin Low-Profile Quad Flat Package (LQFP) with exposed thermal pad, JEDEC MS-026AC compliant, and RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | 3.3 V nominal; requires local 100 nF + 10 µF decoupling per power domain |
| GND | Ground reference | Multiple pins assigned to minimize ground bounce during high-speed peripheral operation |
| OSC0 / OSC1 | External crystal input/output | Supports 1–25 MHz crystals; internal oscillator enables boot without external components |
| RTCCLK | Real-time clock input | Accepts 32.768 kHz watch crystal for hibernation-mode timekeeping |
| CAN0RX / CAN0TX | CAN physical layer interface | Differential pair routed to external transceiver; supports ISO 11898-2 compliant signaling |
| PA0–PA7 | GPIO Port A | Configurable as digital I/O, UART0, SSI0, or I²C0 signals - multiplexed per system control register |
| PD0–PD7 | GPIO Port D | Includes CAN0RX/CAN0TX alternate functions; supports edge-triggered interrupts for wake-up from hibernation |
| nWAKE | Hibernate wake-up input | Active-low signal that exits hibernation on falling edge; debounced internally |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Enables <1.7 µA system sleep with RTC running, battery-backed 2 KB RAM retention, and wake-up via CAN, GPIO, or timer match |
| Integrated CAN Controller | Full CAN 2.0A/B compliance with 32 message objects, hardware ID filtering, and automatic retransmission on error |
| Memory Protection Unit (MPU) | Configurable region-based access control for flash, SRAM, and peripherals - supports secure bootloader isolation |
| ADC with Sequencer | 12-bit resolution, 12-channel input, 1 MSPS sampling, and hardware-triggered sequence execution for synchronized motor current capture |
| Debug Interface | SWD/JTAG with 4-pin Serial Wire Debug support - enables non-intrusive real-time trace and breakpoint debugging |
| Peripheral Integration | Single-chip solution includes UART, SSI, I²C, PWM, watchdog, timers, and analog comparators - eliminates external glue logic |
Applications
| Industrial Motor Control | Building Automation Node |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC blowers with field-oriented control (FOC) algorithm execution. IC Role / Device Role / Timing Role: Real-time computation engine executing FOC at 20 kHz PWM frequency while managing CAN bus communication with central controller. Use Value: Deterministic 50 MHz Cortex-M3 core and hardware-accelerated PWM generation reduce jitter in commutation timing, improving motor efficiency by ≥3% versus 8-bit alternatives. | Use Scenario: Distributed sensor node aggregating temperature, occupancy, and lighting status in commercial office spaces. IC Role / Device Role / Timing Role: Low-power coordinator collecting data via I²C sensors, buffering locally in SRAM, and transmitting over CAN to gateway every 30 seconds. Use Value: Hibernation current of 1.7 µA extends battery life to >2 years on two AA cells, eliminating scheduled maintenance cycles. |
| Factory Floor CAN Gateway | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: Protocol translation between Modbus RTU (via UART) and CANopen networks in legacy machine integration. IC Role / Device Role / Timing Role: Message routing engine with dual-bus awareness - receives Modbus frames, parses payload, and maps to CAN message objects with configurable ID mapping. Use Value: On-chip CAN controller with 32 message objects enables concurrent handling of 16+ device endpoints without external CAN controller IC or FPGA logic. | Use Scenario: Digital input/output expansion module for DIN-rail mounted PLCs, monitoring 16 discrete inputs and driving 8 relay outputs. IC Role / Device Role / Timing Role: Deterministic I/O manager sampling inputs at 1 kHz, applying debounce filters, and updating outputs within 1 ms of change detection. Use Value: GPIO ports with configurable slew rate and drive strength ensure noise immunity in electrically noisy factory environments, reducing spurious state transitions by >99.9%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Tiva C TM4C123GH6PM | Successor part with same pinout, 80 MHz Cortex-M4F core, FPU, enhanced CAN, and updated peripheral set | Supports floating-point math for advanced motor control algorithms and higher CAN bandwidth | Select when new design requires FPU, higher clock speed, or extended peripheral features; not drop-in due to minor register map changes |
| STM32F103VCT6 | ARM Cortex-M3 at 72 MHz, 256 KB flash, 48 KB SRAM, no native CAN hibernation support, different pinout | Lacks integrated hibernation module and battery-backed RAM; requires external RTC and backup power circuitry | Select for cost-sensitive applications where hibernation is not required and CAN is implemented via external transceiver only |
Compared with TM4C123GH6PM and STM32F103VCT6, the LM3S2911-IBZ50-A2T provides verified hibernation functionality with sub-2 µA current and integrated RTC crystal input - critical for battery-operated nodes where runtime and board space are constrained.
Availability
LM3S2911-IBZ50-A2T is available at Aetrix Electronics and suitable for industrial motor control, building automation nodes, factory floor CAN gateways, and PLC I/O modules requiring stable component supply across long-lifecycle deployments.
Supply support for LM3S2911-IBZ50-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 and embedded processing solutions for industrial, automotive, and consumer markets since 1930.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time embedded applications requiring integrated connectivity (CAN, UART, I²C), low-power hibernation, and deterministic interrupt response - targeting industrial automation and motor control.
FAQ
What is the maximum operating frequency of the LM3S2911-IBZ50-A2T?
The LM3S2911-IBZ50-A2T operates at a maximum CPU clock frequency of 50 MHz. This rating is guaranteed across the full industrial temperature range (–40°C to +85°C) and 3.0–3.6 V supply voltage. The device achieves this speed using an internal PLL that multiplies the input crystal or oscillator frequency, and all peripherals are clocked synchronously to maintain timing integrity. The LM3S2911-IBZ50-A2T does not support overclocking beyond 50 MHz under any conditions.
Does the LM3S2911-IBZ50-A2T include a hardware CAN controller?
Yes, the LM3S2911-IBZ50-A2T integrates a fully compliant CAN 2.0A/B controller with 32 message objects, programmable bit timing registers, hardware acceptance filtering, and automatic retransmission on error. It supports both standard (11-bit) and extended (29-bit) identifier formats and includes dedicated CAN0RX and CAN0TX pins mapped to Port D. The LM3S2911-IBZ50-A2T requires an external CAN transceiver (e.g., SN65HVD230) for physical layer interfacing.
What power-saving modes does the LM3S2911-IBZ50-A2T support?
The LM3S2911-IBZ50-A2T supports Sleep, Deep-Sleep, and Hibernate modes. Hibernate mode draws only 1.7 µA while retaining RTC operation, 2 KB of battery-backed RAM, and wake-up capability via GPIO, CAN, or RTC match. Sleep and Deep-Sleep reduce current to 150 µA and 25 µA respectively, with varying peripheral retention. The LM3S2911-IBZ50-A2T enters these modes via CMSIS-defined SCB->SCR register writes and wakes on configured interrupt sources.
Is the LM3S2911-IBZ50-A2T pin-compatible with other Stellaris devices?
The LM3S2911-IBZ50-A2T uses a 100-pin LQFP package identical to LM3S2671, LM3S2776, and LM3S2965 in footprint and pin assignment for power, ground, JTAG, and primary peripherals. However, alternate function mappings (e.g., UART vs. SSI on Port A) differ between variants, so PCB layout reuse requires verification of signal routing against the specific variant's datasheet. The LM3S2911-IBZ50-A2T is not pin-compatible with 64-pin or 144-pin Stellaris devices.
What debug interface does the LM3S2911-IBZ50-A2T provide?
The LM3S2911-IBZ50-A2T supports both JTAG and Serial Wire Debug (SWD) interfaces using the same four-pin SWDIO, SWCLK, nRESET, and GND connections. It includes an integrated Instrumentation Trace Macrocell (ITM) and supports real-time variable monitoring and instruction trace via compatible debug probes (e.g., TI XDS100v3). The LM3S2911-IBZ50-A2T does not require external debug hardware beyond a standard SWD adapter.
LM3S2911-IBZ50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 108-LFBGA
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Not 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-IBZ50-A2T FAQ
1.How can I place an order for LM3S2911-IBZ50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2911-IBZ50-A2T 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-IBZ50-A2T reliable?
The price and inventory of LM3S2911-IBZ50-A2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S2911-IBZ50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S2911-IBZ50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2911-IBZ50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2911-IBZ50-A2T?
LM3S2911-IBZ50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2911-IBZ50-A2T 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-IBZ50-A2T?
For technical support, including LM3S2911-IBZ50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2911-IBZ50-A2T requirements.
6.How does Aetrix verify that LM3S2911-IBZ50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S2911-IBZ50-A2T 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-IBZ50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S2911-IBZ50-A2T?
All LM3S2911-IBZ50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2911-IBZ50-A2T, 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-IBZ50-A2T part is unused and in its original packaging.
Return procedure for LM3S2911-IBZ50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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