Overview
The Stellaris® LM3S800 microcontroller, produced by Texas Instruments, is a high-performance ARM® Cortex™-M3 based microcontroller. It operates at up to 50 MHz and is designed for real-time embedded applications. This microcontroller is part of the Stellaris family, known for its robust feature set and ease of use. The LM3S800 is available in various package options, including 48-pin LQFP and QFN, and supports both industrial and extended temperature ranges.
Key Specifications
| Specification | Details |
|---|---|
| Processor Core | 32-bit ARM® Cortex™-M3 |
| Operating Frequency | Up to 50 MHz |
| Flash Memory | 64 KB single-cycle flash |
| SRAM | 8 KB single-cycle SRAM |
| Interrupt Controller | Integrated Nested Vectored Interrupt Controller (NVIC) with 21 interrupt channels and eight priority levels |
| Timers | Three General-Purpose Timer Modules (GPTM), each configurable as one 32-bit or two 16-bit timers |
| Watchdog Timer | 32-bit down counter with programmable load register and separate watchdog clock |
| UARTs | Two fully programmable 16C550-type UARTs with separate FIFOs |
| SSI | Programmable interface for Freescale SPI, MICROWIRE, or Texas Instruments synchronous serial interfaces |
| I2C Interface | Master and slave operation with transmission speeds up to 100 Kbps in Standard mode and 400 Kbps in Fast mode |
| Analog Comparators | Three independent integrated analog comparators |
| GPIOs | 8-36 GPIOs, depending on configuration, with programmable interrupt generation and drive strength |
| Power Management | On-chip Low Drop-Out (LDO) voltage regulator, sleep and deep-sleep modes, and user-enabled LDO unregulated voltage detection |
| Package and Temperature | 48-pin LQFP and QFN packages, industrial temperature (-40°C to +85°C) and extended temperature (-40°C to +105°C) |
Key Features
- 32-Bit RISC Performance: ARM® Cortex™-M3 v7M architecture optimized for small-footprint embedded applications.
- System Timer (SysTick): Provides a simple, 24-bit clear-on-write, decrementing, wrap-on-zero counter with a flexible control mechanism.
- Thumb-2 Instruction Set: Thumb®-compatible Thumb-2-only instruction set processor core for high code density.
- Memory Protection Unit (MPU): Provides a privileged mode for protected operating system functionality.
- Unaligned Data Access: Enables data to be efficiently packed into memory.
- Atomic Bit Manipulation: Bit-banding delivers maximum memory utilization and streamlined peripheral control.
- General-Purpose Timers: Three GPTM modules, each configurable as one 32-bit or two 16-bit timers, with Real-Time Clock (RTC) capability.
- Watchdog Timer: 32-bit down counter with programmable load register and separate watchdog clock.
- Synchronous Serial Interface (SSI): Programmable interface for Freescale SPI, MICROWIRE, or Texas Instruments synchronous serial interfaces.
- UARTs: Two fully programmable 16C550-type UARTs with separate FIFOs.
- I2C Interface: Master and slave operation with transmission speeds up to 100 Kbps in Standard mode and 400 Kbps in Fast mode.
- Analog Comparators: Three independent integrated analog comparators configurable for output to drive an output pin or generate an interrupt.
- GPIOs: 8-36 GPIOs, depending on configuration, with programmable interrupt generation and drive strength.
- Power Management: On-chip Low Drop-Out (LDO) voltage regulator, sleep and deep-sleep modes, and user-enabled LDO unregulated voltage detection.
Applications
- Factory Automation and Control: Suitable for industrial control systems and automation.
- Industrial Control Power Devices: Used in power management and control applications.
- Building and Home Automation: Ideal for smart home and building automation systems.
- Stepper Motors, Brushless DC Motors, and AC Induction Motors: Used in motor control applications.
Q & A
- What is the core processor of the LM3S800 microcontroller?
The core processor is a 32-bit ARM® Cortex™-M3.
- What is the maximum operating frequency of the LM3S800?
The maximum operating frequency is up to 50 MHz.
- How much flash and SRAM memory does the LM3S800 have?
The LM3S800 has 64 KB of single-cycle flash and 8 KB of single-cycle SRAM.
- What types of timers are available on the LM3S800?
The LM3S800 has three General-Purpose Timer Modules (GPTM), each configurable as one 32-bit or two 16-bit timers, with Real-Time Clock (RTC) capability.
- Does the LM3S800 have a watchdog timer?
Yes, it has a 32-bit down counter with a programmable load register and separate watchdog clock.
- What serial communication interfaces are available on the LM3S800?
The LM3S800 includes two UARTs, an SSI interface, and an I2C interface.
- How many analog comparators does the LM3S800 have?
The LM3S800 has three independent integrated analog comparators.
- What is the temperature range for the LM3S800?
The temperature range is from -40°C to +85°C for industrial temperature and -40°C to +105°C for extended temperature.
- What package options are available for the LM3S800?
The LM3S800 is available in 48-pin LQFP and QFN packages.
- What are some typical applications for the LM3S800?
Typical applications include factory automation, industrial control, building and home automation, and motor control.
