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Texas Instruments LM3S6911-IQC50-A2
- Part No.:
- LM3S6911-IQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S6911-IQC50-A2.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:360
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Product details
Overview
LM3S6911-IQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated Ethernet MAC, dual UARTs, I²C, SSI, analog comparators, and hibernation module. It operates at 50 MHz, supports -40°C to +85°C industrial temperature range, and targets real-time control in networked embedded systems.
For engineers reviewing the LM3S6911-IQC50-A2 datasheet, LM3S6911-IQC50-A2 pinout, LM3S6911-IQC50-A2 application, or LM3S6911-IQC50-A2 equivalent, key selection criteria include Ethernet MAC integration, hibernation power management, 100-pin LQFP package compatibility, and Cortex-M3 debug support via JTAG/SWD.
Technical Context
The LM3S6911-IQC50-A2 implements the ARMv7-M architecture with NVIC, SysTick, MPU, and TPIU for deterministic real-time execution. It integrates a full Ethernet MAC (no external PHY required), dual hardware UARTs with FIFOs and IrDA support, and a dedicated hibernation module with RTC, battery-backed memory, and wake-on-external-event capability.
Its peripheral set includes two SSI controllers (SPI/SSI mode), one I²C master/slave interface, eight general-purpose timers (including RTC-capable GPTM), four analog comparators, and GPIOs with interrupt-on-change and slew-rate control - all clocked from a configurable PLL-based system clock up to 50 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, 50 MHz max operation - enables deterministic interrupt latency & efficient C/C++ code execution |
| Memory | 256 KB on-chip flash (programmable in 1 KB sectors), 64 KB SRAM - sufficient for standalone Ethernet protocol stacks and real-time firmware |
| Temperature Range | -40°C to +85°C - qualified for industrial control, building automation, and outdoor networking equipment |
| Ethernet Interface | Integrated 10/100 Mbps MAC with MII interface - eliminates need for external MAC; requires external PHY for physical layer connection |
| Hibernation Module | Dedicated low-power domain with RTC, battery-backed 2 KB RAM, and wake-on-RTC-match or GPIO - reduces system standby current to ~1.7 µA |
| Debug Interface | JTAG and SWD support via dedicated pins - enables full-cycle debugging, flash programming, and real-time trace with TI's ICDI or third-party tools |
| Package | 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) - standard surface-mount footprint compatible with automated PCB assembly |
Pinout & Package
LM3S6911-IQC50-A2 is housed in a 100-pin LQFP package (JEDEC MS-026AC) with exposed thermal pad. Pin functions are defined per TI SPMS139I datasheet Section 16 (Pin Diagram) and Section 17 (Signal Tables).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate digital core (VDDC), analog (VDDA), and I/O (VDD) rails - enable noise isolation for ADC/comparator circuits |
| GND, GNDA, GNDC | Ground returns | Dedicated analog (GNDA) and core (GNDC) grounds - reduce coupling between sensitive analog and switching digital domains |
| PD0–PD7, PE0–PE7, PF0–PF4, etc. | GPIO banks | Multi-function pins supporting UART, SSI, I²C, timer capture, and external interrupt - configurable per-port control registers |
| RMII_RX0, RMII_RX1, RMII_CRS_DV, RMII_TXEN, RMII_TX0, RMII_TX1, RMII_REFCLK | Ethernet MAC interface | Reduced Media Independent Interface (RMII) signals - connects directly to RMII-compliant PHY without external glue logic |
| nRST, nWAKE | Reset & wake control | Asynchronous active-low reset input; nWAKE supports wake-from-hibernate via external signal edge detection |
| TCK, TMS, TDI, TDO, nTRST | JTAG debug interface | Standard 5-pin JTAG boundary-scan and debug access - supports TI's Stellaris ICDI, Segger J-Link, and OpenOCD |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Ethernet MAC | Enables standalone network connectivity without external MAC IC - reduces BOM count and PCB area in industrial gateways |
| Hibernation Module with RTC | Provides sub-µA sleep current with timekeeping and wake-on-event - essential for battery-powered remote sensors and metering endpoints |
| Dual Hardware UARTs with IrDA | Supports simultaneous RS-232/485 and infrared communication - simplifies legacy device integration and human-interface telemetry |
| Programmable Memory Protection Unit (MPU) | Allows runtime partitioning of flash/SRAM into privileged/unprivileged regions - enhances firmware security and robustness in multi-tasking RTOS environments |
| Eight General-Purpose Timers | Includes 32-bit RTC-capable timer and PWM-capable 16-bit timers - supports motor control, pulse-width modulation, and precise time-stamping without external timing ICs |
Applications
| Industrial Ethernet Gateway | Smart Energy Meter |
|---|---|
Use Scenario: Aggregating Modbus RTU data from field devices and forwarding over TCP/IP to SCADA systems. IC Role / Device Role / Timing Role: Primary controller executing protocol translation, Ethernet packet handling, and real-time scheduling. Use Value: Integrated MAC and 50 MHz Cortex-M3 deliver deterministic packet processing latency under 100 µs with no external timing jitter sources. | Use Scenario: Battery-operated electricity meter logging consumption every 15 minutes and transmitting via cellular or RF mesh when awake. IC Role / Device Role / Timing Role: System-on-chip managing metrology ADC interface, RTC-driven wake cycles, and secure firmware updates. Use Value: Hibernation module draws only 1.7 µA while maintaining RTC accuracy ±2 ppm - extends 2× AA battery life beyond 10 years. |
| Building Automation Controller | Networked HVAC Actuator |
Use Scenario: Local controller for VAV boxes, reading temperature/humidity sensors and modulating damper position via 4–20 mA output. IC Role / Device Role / Timing Role: Real-time motion control engine with analog comparator-based fault detection and Ethernet supervision. Use Value: Four analog comparators monitor sensor supply rails and actuator feedback in hardware - eliminates software polling overhead and improves fault response to <1 µs. | Use Scenario: Distributed actuator node receiving BACnet/IP commands and driving stepper motors for damper positioning. IC Role / Device Role / Timing Role: Network endpoint with deterministic command parsing, PWM generation, and watchdog-monitored operation. Use Value: Dual UARTs allow simultaneous BACnet/IP stack debug port and legacy BACnet MS/TP interface - avoids gateway dependency in retrofit installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S6965-IQC50-A2 | Same core, 256 KB flash, but adds USB 2.0 OTG controller and removes Ethernet MAC - different peripheral trade-off | Preferred for USB-hosted human interface devices; unsuitable where Ethernet is mandatory | Select LM3S6965-IQC50-A2 only if USB connectivity outweighs Ethernet requirement and PHY interface is not needed |
| TM4C123GH6PM | Successor family: Cortex-M4F core, 256 KB flash, 32 KB SRAM, integrated PHY option, enhanced FPU - higher performance, newer silicon | Supports floating-point math for advanced control algorithms; includes optional internal PHY reducing external component count | Choose TM4C123GH6PM for new designs requiring higher compute throughput, FPU, or reduced bill-of-materials with PHY integration |
Compared with LM3S6911-IQC50-A2, LM3S6965-IQC50-A2 trades Ethernet for USB, making it incompatible for wired network nodes; TM4C123GH6PM offers architectural upgrades and broader ecosystem support but requires PCB redesign due to different pinout and voltage requirements.
Availability
LM3S6911-IQC50-A2 is available at Aetrix Electronics and suitable for industrial Ethernet gateways, smart energy meters, building automation controllers, and networked HVAC actuators requiring stable component supply across extended product lifecycles.
Supply support for LM3S6911-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 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 embedded applications requiring integrated connectivity - especially industrial control, building automation, and intelligent sensing where Ethernet, low-power hibernation, and deterministic interrupt response are critical.
FAQ
Does the LM3S6911-IQC50-A2 include an integrated Ethernet PHY?
No, the LM3S6911-IQC50-A2 integrates only the Ethernet MAC layer. It requires an external PHY chip connected via RMII interface signals (RMII_RX0, RMII_TX0, RMII_REFCLK, etc.). The LM3S6911-IQC50-A2 does not contain physical-layer transceivers, magnetics, or line drivers - those must be provided externally per IEEE 802.3 standards.
What is the maximum operating frequency of the LM3S6911-IQC50-A2?
The LM3S6911-IQC50-A2 operates at a maximum system clock frequency of 50 MHz, achieved using its internal PLL with crystal or external clock input. This frequency applies to CPU, bus matrix, and most peripherals; some analog blocks (e.g., comparators) operate independently at lower clock rates as specified in the electrical characteristics table.
Is the LM3S6911-IQC50-A2 pin-compatible with other Stellaris LM3S devices?
No, the LM3S6911-IQC50-A2 is not pin-compatible with other LM3S variants such as LM3S6965 or LM3S8962. While all use 100-pin LQFP packages, signal assignments differ significantly - especially for Ethernet, USB, and peripheral multiplexing. Migration requires PCB layout revision and firmware adaptation.
What debug interfaces does the LM3S6911-IQC50-A2 support?
The LM3S6911-IQC50-A2 supports both JTAG and Serial Wire Debug (SWD) protocols via dedicated pins (TCK, TMS, TDI, TDO, nTRST). TI's Stellaris ICDI, Segger J-Link, and OpenOCD-based tools provide full flash programming, breakpoint setting, and real-time register inspection for the LM3S6911-IQC50-A2.
Does the LM3S6911-IQC50-A2 support USB functionality?
No, the LM3S6911-IQC50-A2 does not include USB hardware. USB capability is present in other Stellaris parts like LM3S6965-IQC50-A2, but the LM3S6911-IQC50-A2 omits the USB controller block entirely. Designs requiring USB must select a different variant or add an external USB-to-UART bridge IC.
LM3S6911-IQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 6000
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- 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:
- 46
- 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:
LM3S6911-IQC50-A2 FAQ
1.How can I place an order for LM3S6911-IQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S6911-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 LM3S6911-IQC50-A2 reliable?
The price and inventory of LM3S6911-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 LM3S6911-IQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S6911-IQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S6911-IQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S6911-IQC50-A2?
LM3S6911-IQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S6911-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 LM3S6911-IQC50-A2?
For technical support, including LM3S6911-IQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S6911-IQC50-A2 requirements.
6.How does Aetrix verify that LM3S6911-IQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S6911-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 LM3S6911-IQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S6911-IQC50-A2?
All LM3S6911-IQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S6911-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 LM3S6911-IQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S6911-IQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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