Overview
The Stellaris® LM3S5749 microcontroller, produced by Texas Instruments, is a powerful and feature-rich device based on the ARM® Cortex™-M3 controller core. Operating at up to 50 MHz, this microcontroller is designed for a wide range of applications requiring advanced connectivity, motion control, and analog capabilities. It features 128 kB of single-cycle flash memory and 64 kB of single-cycle SRAM, along with a 32-channel configurable μDMA controller. The LM3S5749 also includes a battery-backed hibernation module with a real-time clock and 256 bytes of non-volatile state-saving memory, making it suitable for energy-efficient and real-time industrial applications.
Key Specifications
| Parameter | Specification |
|---|---|
| Processor Core | 32-bit ARM® Cortex™-M3, up to 50 MHz |
| Memory | 128 kB single-cycle flash, 64 kB single-cycle SRAM |
| DMA | 32-channel configurable μDMA controller |
| GPIOs | Up to 61 GPIOs with programmable control |
| Timers | 4 General-Purpose Timer Modules (GPTM), each with two 16-bit timers/counters |
| ADC | 10-bit Analog-to-Digital Converter with 8 analog input channels, 1M samples/second |
| UARTs | Two fully programmable 16C550-type UARTs with IrDA support |
| SSI/SPI | Two Synchronous Serial Interface (SSI) modules |
| I2C | Two Inter-Integrated Circuit (I2C) Interface modules |
| CAN | Two Controller Area Network (CAN) Interface modules, CAN 2.0 part A/B |
| USB | Universal Serial Bus (USB) Controller with USB 2.0 full-speed and low-speed operation |
| Analog Comparators | Two integrated analog comparators |
| PWM | Four PWM generator blocks with dead-band and fault protection inputs |
| QEI | Quadrature Encoder Interface (QEI) for position and velocity tracking |
| Package | 100-pin RoHS-compliant LQFP package |
Key Features
- Advanced Motion Control: Includes 8 motion-control PWM outputs with dead-band, a quadrature encoder input, and fault protection inputs for low-latency shutdown.
- Intelligent Analog Capability: Features 2 analog comparators and an 8-channel 10-bit ADC with a sample rate of 1 million samples per second.
- Real-Time Industrial Connectivity: Supports 2 CAN controllers, USB 2.0 full-speed and low-speed operation, 2 SSI/SPI controllers, 2 I2C interfaces, and 2 UARTs.
- Power Management: Includes a battery-backed hibernation module with a real-time clock and 256 bytes of non-volatile state-saving memory.
- Debug and Development: Full-featured debug solution with JTAG and Serial Wire interfaces, and IEEE 1149.1-1990 compliant Test Access Port (TAP) controller.
- General-Purpose Timers and Watchdog: Four General-Purpose Timer Modules (GPTM) and an ARM FiRM-compliant Watchdog Timer.
Applications
- Industrial Automation: Suitable for control systems, robotics, and other industrial automation applications due to its advanced motion control and real-time connectivity features.
- Medical Devices: Can be used in medical devices requiring precise analog measurements and reliable communication interfaces.
- Automotive Systems: Applicable in automotive systems for control and monitoring functions, leveraging its CAN and other communication interfaces.
- Consumer Electronics: Useful in consumer electronics that require advanced user interfaces and connectivity options like USB and UARTs.
- Energy and Utilities: Can be employed in energy management and utility metering applications due to its power management and hibernation features.
Q & A
- What is the processor core of the LM3S5749 microcontroller?
The LM3S5749 microcontroller is based on the 32-bit ARM® Cortex™-M3 controller core, operating at up to 50 MHz.
- How much flash and SRAM memory does the LM3S5749 have?
The LM3S5749 has 128 kB of single-cycle flash memory and 64 kB of single-cycle SRAM.
- What types of communication interfaces does the LM3S5749 support?
The LM3S5749 supports 2 CAN controllers, USB 2.0 full-speed and low-speed operation, 2 SSI/SPI controllers, 2 I2C interfaces, and 2 UARTs.
- What is the purpose of the Quadrature Encoder Interface (QEI) in the LM3S5749?
The QEI is used for tracking encoder position and velocity, featuring a position integrator and built-in timer.
- Does the LM3S5749 have any power-saving features?
Yes, it includes a battery-backed hibernation module with a real-time clock and 256 bytes of non-volatile state-saving memory.
- How many GPIOs does the LM3S5749 have?
The LM3S5749 has up to 61 GPIOs with programmable control.
- What is the role of the analog comparators in the LM3S5749?
The two integrated analog comparators can initiate an ADC sample sequence, drive an output pin, or generate an interrupt.
- Does the LM3S5749 support debug interfaces?
Yes, it features a full-featured debug solution with JTAG and Serial Wire interfaces, and an IEEE 1149.1-1990 compliant Test Access Port (TAP) controller.
- What is the package type of the LM3S5749?
The LM3S5749 comes in a 100-pin RoHS-compliant LQFP package.
- What are some typical applications of the LM3S5749 microcontroller?
The LM3S5749 is suitable for industrial automation, medical devices, automotive systems, consumer electronics, and energy and utility applications.
