Overview
The Stellaris® LM3S3748 microcontroller, produced by Texas Instruments, is a high-performance embedded microcontroller based on the ARM® Cortex™-M3 processor core. It operates at a maximum frequency of 50 MHz and features a comprehensive set of peripherals and interfaces, making it suitable for a wide range of real-time embedded applications. The microcontroller includes 128 KB of single-cycle flash memory and 64 KB of single-cycle SRAM, along with a battery-backed hibernation module and a real-time clock. It also supports advanced motion control, industrial connectivity, and intelligent analog capabilities, making it a versatile choice for various industrial and consumer applications.
Key Specifications
| Parameter | Specification |
|---|---|
| Processor Core | 32-bit ARM® Cortex™-M3, 50 MHz |
| Memory | 128 KB single-cycle flash, 64 KB single-cycle SRAM |
| GPIOs | Up to 61 GPIOs |
| Analog-to-Digital Converter (ADC) | 10-bit, 8 channels, 1 million samples/second |
| UARTs | Two fully programmable 16C550-type UARTs with IrDA support |
| SSI/SPI | Two Synchronous Serial Interface (SSI) modules |
| I2C | Two I2C modules, Standard (100 Kbps) and Fast (400 Kbps) |
| USB | USB 2.0 full-speed (12 Mbps) and low-speed (1.5 Mbps), Host/Device mode |
| PWM | Four PWM generator blocks with dead-band and fault inputs |
| Quadrature Encoder Interface (QEI) | Position integrator and velocity capture using built-in timer |
| Package | 100-pin RoHS-compliant LQFP |
| Operating Temperature | -40°C to +85°C |
| Supply Voltage | 2.25 V to 2.75 V |
Key Features
- Advanced Motion Control: 8 motion-control PWM outputs with dead-band, quadrature encoder input for precise position monitoring, and fault protection input for low-latency shutdown.
- Industrial Connectivity: USB 2.0 full-speed and low-speed operation, two SSI/SPI controllers, two I2C interfaces, and two UARTs with IrDA support.
- Intelligent Analog Capability: Two analog comparators and an 8-channel 10-bit ADC with a sample rate of 1 million samples/second.
- Timer and DMA: Four General-Purpose Timer Modules (GPTM), each providing two 16-bit timers/counters, and a 32-channel configurable μDMA controller.
- Power Management: Battery-backed hibernation module with real-time clock, low drop-out voltage regulator, brown-out reset, and power-on reset controller.
- Debug and Development: Full-featured debug solution with JTAG and Serial Wire interfaces, and IEEE 1149.1-1990 compliant Test Access Port (TAP) controller.
Applications
- Motion control
- Factory automation
- Fire and security systems
- HVAC and building control
- Test and measurement equipment
- Remote monitoring systems
- Electronic point-of-sale (POS) machines
- Network appliances and switches
- Gaming equipment
Q & A
- What is the processor core of the LM3S3748 microcontroller?
The LM3S3748 microcontroller is based on the 32-bit ARM® Cortex™-M3 processor core.
- What is the maximum operating frequency of the LM3S3748?
The maximum operating frequency is 50 MHz.
- How much flash and SRAM memory does the LM3S3748 have?
The LM3S3748 has 128 KB of single-cycle flash memory and 64 KB of single-cycle SRAM.
- What types of serial interfaces are supported by the LM3S3748?
The LM3S3748 supports USB 2.0, two SSI/SPI modules, two I2C interfaces, and two UARTs with IrDA support.
- What are the key features of the LM3S3748's motion control capabilities?
The LM3S3748 features 8 motion-control PWM outputs with dead-band, a quadrature encoder input, and fault protection inputs for low-latency shutdown.
- What is the sample rate of the ADC in the LM3S3748?
The ADC has a sample rate of one million samples per second.
- Does the LM3S3748 support battery-backed hibernation?
Yes, it includes a battery-backed hibernation module with a real-time clock.
- What is the operating temperature range of the LM3S3748?
The operating temperature range is -40°C to +85°C.
- What package type is the LM3S3748 available in?
The LM3S3748 is available in a 100-pin RoHS-compliant LQFP package.
- What are some of the target applications for the LM3S3748?
Target applications include motion control, factory automation, fire and security systems, HVAC and building control, and more.
