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Texas Instruments LM3S2948-EQC50-A2
- Part No.:
- LM3S2948-EQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2948-EQC50-A2.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,590
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Product details
Overview
LM3S2948-EQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated CAN 2.0B controller, 12-bit ADC (up to 1 MSPS), and hibernation module supporting RTC and battery-backed memory. It operates at 50 MHz and targets motor control and industrial automation systems requiring deterministic real-time response.
For engineers reviewing the LM3S2948-EQC50-A2 datasheet, LM3S2948-EQC50-A2 pinout, LM3S2948-EQC50-A2 application, or LM3S2948-EQC50-A2 equivalent, key selection criteria include its dual UARTs with IrDA/SIR support, 8-channel PWM with dead-band generation, hibernation power mode (<1 µA), and CAN interface with 32 message objects - all in a 100-pin LQFP package.
Technical Context
The LM3S2948-EQC50-A2 implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC for prioritized interrupt handling, and SysTick timer. Its peripheral set includes three general-purpose timers (GPTM), two UARTs with hardware flow control and SIR encoding, and an I²C master/slave interface compliant with SMBus 2.0.
It integrates a dedicated hibernation module with independent 32.768 kHz RTC oscillator, battery-switchover circuitry, and 2 KB of battery-backed SRAM. The analog subsystem features a 12-bit ADC with four sample sequencers, hardware averaging, and internal temperature sensor - all synchronized to system clock domains without external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max operation - enables deterministic real-time task scheduling with <12-cycle interrupt latency. |
| Memory | 256 KB flash + 64 KB SRAM - supports firmware updates in-field and large control algorithm buffers. |
| ADC | 12-bit, 1 MSPS, 8-channel, 4 sequencers - allows simultaneous sampling of motor phase currents and bus voltage. |
| CAN Interface | CAN 2.0B compliant, 32 message objects, programmable bit timing - supports robust fieldbus communication in industrial networks. |
| Hibernation Mode | <1 µA typical current, RTC + 2 KB battery-backed SRAM - enables long-term data logging during main power loss. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - provides full peripheral access while fitting standard industrial PCB layouts. |
| Operating Temp | –40°C to +105°C - qualified for extended-temperature industrial environments including motor drive enclosures. |
Pinout & Package
LM3S2948-EQC50-A2 is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with exposed thermal pad, JEDEC MS-026AC compliant. Pinout validated per TI SPMS060I Rev I datasheet (July 2014), pages 41, 168–172, 283–293.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Dedicated domains for digital logic (VDD), analog (VDDA), and core (VDDC) - enable noise isolation critical for ADC accuracy. |
| GPIOA[7:0]–GPIOE[7:0] | General-purpose I/O banks | 5×8-bit ports with configurable slew rate, pull-up/down, and open-drain - support encoder interfacing, LED drivers, and digital I/O expansion. |
| CAN0RX / CAN0TX | CAN physical layer interface | Differential receive/transmit pins for ISO 11898-1 compliant bus connection - require external transceiver for termination and level translation. |
| SSI0CLK / SSI0FSS / SSI0RX / SSI0TX | Synchronous serial interface | Four-pin SPI-compatible port supporting daisy-chain or multi-slave configurations - used for sensor arrays or display controllers. |
| UART0RX / UART0TX / UART1RX / UART1TX | Asynchronous serial I/O | Two independent UARTs with full modem control signals - enable simultaneous debug console and fieldbus protocol (e.g., Modbus RTU) communication. |
| HIBRST / HIBACK | Hibernation module control | Reset assertion and acknowledgment signals for controlled entry/exit from hibernation - ensure safe state retention before power-down. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN 2.0B Controller | 32 message objects with mask-based filtering - eliminates need for external CAN protocol IC in motor drive and PLC designs. |
| Hibernation Module with RTC | Independent 32.768 kHz oscillator and battery switchover - maintains timekeeping and logs events during AC power failure without external RTC chip. |
| Motor Control PWM | 8-channel PWM with programmable dead-band, fault protection, and synchronous update - directly drives 3-phase inverter gate drivers. |
| Dual UART with SIR Encoding | Hardware IrDA physical layer support - enables contactless configuration via handheld IR remotes in embedded HMI applications. |
| ADC with Hardware Averaging | Up to 64-sample hardware averaging per conversion - improves SNR for precision current sensing without CPU overhead. |
Applications
| Industrial Motor Drive | Building Automation Controller |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors in HVAC compressors and pumps. IC Role / Device Role / Timing Role: Real-time execution of FOC (Field-Oriented Control) algorithms, PWM generation, current/voltage sensing, and CAN-based commissioning. Use Value: Integrated 8-channel PWM with dead-band and ADC synchronization reduces component count and timing skew versus discrete MCU + peripheral solutions. | Use Scenario: Central controller managing lighting, HVAC, and security subsystems across multi-floor commercial buildings. IC Role / Device Role / Timing Role: Protocol gateway between BACnet/IP (Ethernet), KNX (TP), and local sensor networks (I²C, UART). Use Value: Dual UARTs with IrDA and I²C slave capability enable legacy device integration and remote diagnostics without additional interface ICs. |
| Energy Meter Data Logger | Factory Floor PLC I/O Module |
Use Scenario: Tamper-resistant electricity meter with time-of-use billing and outage event logging. IC Role / Device Role / Timing Role: High-accuracy ADC sampling, secure flash storage, hibernation-mode RTC timestamping, and tamper-detection GPIO monitoring. Use Value: Battery-backed hibernation SRAM retains last-read energy values and timestamps during mains failure - meets ANSI C12.20 Class 0.2 accuracy requirements. | Use Scenario: DIN-rail mounted digital I/O expansion module for modular PLC systems. IC Role / Device Role / Timing Role: Isolated input conditioning, high-speed output switching, CAN bus communication with main PLC rack, and watchdog supervision. Use Value: CAN 2.0B interface with 32 message objects supports deterministic cyclic I/O exchange at 500 kbps - meets IEC 61158 Fieldbus timing constraints. |
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, floating-point unit, and enhanced CAN FIFO - requires minor firmware adaptation. | Supports higher-performance motor control (e.g., PMSM with observer-based control) and audio processing. | Select when upgrading legacy LM3S designs for increased computational headroom and FPU acceleration. |
| STM32F103VET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, no native CAN hibernation support, different peripheral register map and pin assignment. | Requires external RTC and CAN transceiver; better suited for cost-sensitive consumer-grade automation. | Select when leveraging STM32 ecosystem tools and needing larger flash for complex GUI or connectivity stacks. |
Compared with TM4C123GH6PM and STM32F103VET6, the LM3S2948-EQC50-A2 offers unique hibernation-optimized power management and tightly integrated CAN+ADC+PWM for deterministic industrial control - making it optimal for legacy-replacement and low-power field-deployed systems where software compatibility and proven qualification matter.
Availability
LM3S2948-EQC50-A2 is available at Aetrix Electronics and suitable for industrial motor drives, building automation controllers, energy meter data loggers, and factory floor PLC I/O modules requiring stable component supply and long-term lifecycle assurance.
Supply support for LM3S2948-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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets since 1930.
The Stellaris LM3S family was designed specifically for real-time industrial control applications demanding integrated peripherals, low-power hibernation, and deterministic interrupt response - targeting motor control, PLCs, and smart sensors before the Tiva C series succeeded it.
FAQ
What is the maximum operating frequency of the LM3S2948-EQC50-A2?
The LM3S2948-EQC50-A2 operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL or external crystal oscillator. This frequency is specified under full industrial temperature range (–40°C to +105°C) and 3.3 V supply conditions per TI SPMS060I datasheet Section 5.2.4. The LM3S2948-EQC50-A2 achieves consistent timing margins for real-time control loops without derating in harsh environments.
Does the LM3S2948-EQC50-A2 support CAN FD or only classical CAN 2.0B?
The LM3S2948-EQC50-A2 supports only CAN 2.0B protocol - not CAN FD. Its CAN module implements ISO 11898-1 with bit rates up to 1 Mbps, 32 message objects, and acceptance filtering, but lacks the extended data length and flexible bit-rate capabilities of CAN FD. This is confirmed in Section 15.3 of the SPMS060I datasheet. For CAN FD, consider TI's newer TCAN4550 or Tiva C TM4C129x devices.
How much battery-backed memory does the LM3S2948-EQC50-A2 provide in hibernation mode?
The LM3S2948-EQC50-A2 provides 2 KB of battery-backed SRAM accessible during hibernation mode, retained independently of main VDD supply. This memory is managed by the hibernation module (Section 6.3.5 of SPMS060I) and remains functional with VBAT ≥ 1.65 V. The LM3S2948-EQC50-A2 uses this space to store calibration data, event logs, and RTC alarm settings across power cycles.
Is the LM3S2948-EQC50-A2 pin-compatible with other LM3S devices in the same package?
The LM3S2948-EQC50-A2 is pin-compatible with other LM3S2xxx devices in the 100-pin LQFP package (e.g., LM3S2678, LM3S2776), sharing identical pin assignments for power, reset, JTAG, GPIO, and major peripherals like UART, SSI, and CAN. However, peripheral enablement and register-level behavior differ - verified in TI's LM3S2948 datasheet Table 1-1 and pin multiplexing tables (pages 168–172). Always validate peripheral mapping against the specific variant.
What development tools are officially supported for the LM3S2948-EQC50-A2?
Texas Instruments officially supports the LM3S2948-EQC50-A2 with Keil MDK-ARM v4.x, IAR Embedded Workbench for ARM v6.x, and TI's Code Composer Studio v5.x (with Legacy Stellaris support). Debugging uses JTAG/SWD via LM Flash Programmer or Stellaris ICDI interface. The LM3S2948-EQC50-A2 is compatible with evaluation kits such as EK-LM3S2948 and third-party J-Link adapters configured for Cortex-M3.
LM3S2948-EQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- Packaging:
- Tray
- 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:
- 52
- 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:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S2948-EQC50-A2 FAQ
1.How can I place an order for LM3S2948-EQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2948-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 LM3S2948-EQC50-A2 reliable?
The price and inventory of LM3S2948-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 LM3S2948-EQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S2948-EQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2948-EQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2948-EQC50-A2?
LM3S2948-EQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2948-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 LM3S2948-EQC50-A2?
For technical support, including LM3S2948-EQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2948-EQC50-A2 requirements.
6.How does Aetrix verify that LM3S2948-EQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S2948-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 LM3S2948-EQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S2948-EQC50-A2?
All LM3S2948-EQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2948-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 LM3S2948-EQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S2948-EQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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