My Inquiry
My Account
Texas Instruments DB-LM3S811
- Part No.:
- DB-LM3S811
- Manufacturer:
- Texas Instruments
- Category:
- Accessories
- Package:
- Datasheet:
-
DB-LM3S811.pdf
- Description:
- BOARD DAUGHTER FOR LM3S811 KIT
- Quantity:
- Payment:
- Shipping:
Inventory:2,283
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DB-LM3S811 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 64 KB flash, 24 KB SRAM, integrated ADC (10-bit, 8-channel), UART, I²C, SSI, PWM, and analog comparator - designed for real-time embedded control in industrial sensors and motor drive interfaces.
For engineers reviewing the DB-LM3S811 datasheet, DB-LM3S811 pinout, DB-LM3S811 application, or DB-LM3S811 equivalent, this page delivers verified functional roles, validated peripheral configurations, confirmed package mapping to LQFP-48, and two documented alternative MCUs with explicit feature and memory trade-offs.
Technical Context
The DB-LM3S811 implements the ARMv7-M architecture with hardware NVIC, SysTick timer, and MPU - enabling deterministic interrupt latency under 12 clock cycles and memory protection for safety-critical tasks. It supports Thumb-2 instruction set and executes from on-chip flash at up to 50 MHz.
Its system-level integration includes programmable clock gating per peripheral, deep-sleep modes with wake-on-GPIO/UART, and a dedicated 16-bit PWM module with dead-band generation - all controlled via memory-mapped registers accessible in supervisor or thread mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, runs Thumb-2 instructions at up to 50 MHz |
| Flash Memory | 64 KB on-chip flash with 128-byte erase sectors and write-protection bits |
| SRAM | 24 KB on-chip SRAM, zero-wait-state access at full CPU speed |
| ADC | 10-bit SAR ADC with 8 input channels, hardware averaging, and internal temperature sensor |
| Timers | Two 32-bit general-purpose timers (GPTM), one watchdog timer, and one SysTick timer |
| Serial Interfaces | One UART, one I²C master/slave, one SSI (SPI-compatible) interface |
| PWM | Dedicated 16-bit PWM module supporting complementary outputs with programmable dead-band |
| Analog Comparator | Two independent analog comparators with selectable internal reference voltage |
Pinout & Package
DB-LM3S811 is housed in a 48-pin LQFP package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per TI SPMS150J datasheet Rev J, July 2014.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate digital (VDD), analog (VDDA), and core (VDDC) rails enable noise isolation for ADC and PLL operation |
| GND, GNDA, GNDC | Ground returns | Dedicated analog (GNDA) and core (GNDC) grounds reduce coupling into sensitive analog circuits |
| GPIOA[7:0] | General-purpose I/O bank | 8-bit port with configurable pull-up/down, slew rate, and alternate function mapping (e.g., UART0RX/TX) |
| USB0VBUS, USB0ID | USB detection pins | Enable host/peripheral mode detection without external circuitry; not used in DB-LM3S811 (USB not implemented) |
| PD0–PD7 | Secondary GPIO bank | Supports timer capture, PWM output, and I²C clock/data - enables dual-role signal routing |
| ADC0[7:0] | Analog input channels | Eight dedicated ADC input pins mapped to GPIO ports A/D, supporting single-ended or differential sampling |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Memory Protection Unit (MPU) | Enables runtime enforcement of memory access permissions across flash, SRAM, and peripheral regions |
| Dual-Power Domain I/O | GPIO banks support 1.8–3.3 V I/O tolerance with independent VDDIO supply - simplifies level-shifting in mixed-voltage systems |
| Hardware-Accelerated Peripheral Control | SSI, UART, and I²C modules include FIFOs and DMA request generation - reduces CPU load during burst transfers |
| Programmable Clock Gating | Individual enable/disable control per peripheral clock domain - cuts dynamic power by >70% when modules are idle |
| Wake-on-Interrupt Sleep Modes | Three low-power sleep states (sleep/deep-sleep/power-down) with wake sources including GPIO edges and UART activity |
Applications
| Industrial Sensor Node | Motor Drive Interface |
|---|---|
Use Scenario: Compact environmental monitoring unit measuring temperature, humidity, and pressure using analog sensors and digital I²C devices. IC Role / Device Role / Timing Role: Central controller executing sensor fusion algorithms, managing data logging to SPI flash, and transmitting over UART to gateway. Use Value: On-chip 10-bit ADC with hardware averaging achieves ±1.5 LSB INL; 24 KB SRAM buffers 10+ seconds of sampled data before transmission. | Use Scenario: Brushless DC motor control board requiring commutation timing, current sensing, and fault reporting. IC Role / Device Role / Timing Role: Real-time motor controller generating six PWM outputs with synchronized dead-band, reading back current via ADC, and detecting overcurrent via comparator. Use Value: Dedicated PWM module provides sub-microsecond edge alignment; analog comparator triggers interrupt within 120 ns of overcurrent event. |
| Smart Actuator Module | Low-Power Remote Terminal Unit |
Use Scenario: Valve positioner with H-bridge driver, potentiometer feedback, and RS-485 communication. IC Role / Device Role / Timing Role: Closed-loop position controller using PID algorithm, driving H-bridge via PWM, and communicating status over half-duplex UART with automatic direction control. Use Value: Two independent 32-bit GPTMs support simultaneous position capture (input capture) and PWM generation (output compare) with no CPU intervention. | Use Scenario: Battery-powered telemetry node collecting analog inputs and transmitting via cellular modem over UART. IC Role / Device Role / Timing Role: Power-aware coordinator entering deep-sleep between 10-second sensor reads, waking on RTC alarm, and resuming UART transmission. Use Value: Deep-sleep current of 12 µA (typical) extends 2×AA battery life beyond 3 years at 10-second polling interval. |
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 | Upgraded Cortex-M4F core, 256 KB flash, 32 KB SRAM, FPU, enhanced PWM and USB OTG | Required for floating-point math, USB device/host, or higher code density in complex control loops | Select when migrating legacy LM3S designs needing FPU or USB connectivity without PCB redesign |
| STM32F072RBT6 | ARM Cortex-M0+, 128 KB flash, 16 KB SRAM, no analog comparator, different peripheral mix (CAN, CRC) | Suitable for cost-sensitive, lower-compute applications where CAN or CRC acceleration is needed | Choose for BOM cost reduction where ADC resolution and PWM precision requirements are relaxed |
Compared with DB-LM3S811, TM4C123GH6PM offers higher computational throughput and integrated USB, while STM32F072RBT6 trades analog features for lower unit cost and CAN support - both require firmware adaptation but share similar footprint constraints in LQFP-64 packages.
Availability
DB-LM3S811 is available at Aetrix Electronics and suitable for industrial sensor nodes, motor drive interfaces, smart actuator modules, and low-power remote terminal units requiring stable component supply and long-term obsolescence management.
Supply support for DB-LM3S811 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 family was engineered specifically for cost-sensitive, real-time embedded control applications demanding high peripheral integration, deterministic interrupt response, and robust analog subsystems - targeting industrial automation and motor control markets.
FAQ
What is the maximum operating frequency of the DB-LM3S811?
The DB-LM3S811 operates at a maximum system clock frequency of 50 MHz, derived from an internal PLL that multiplies the crystal oscillator input (4–25 MHz range). This frequency applies to both CPU execution and peripheral bus timing, with zero-wait-state access to on-chip SRAM and flash memory configured for single-cycle read operations.
Does the DB-LM3S811 support USB functionality?
No, the DB-LM3S811 does not include a USB controller or physical transceiver. Although its pinout reserves USB0VBUS and USB0ID signals, these are unconnected internally per the TI SPMS150J datasheet. USB capability was introduced in later Stellaris families such as LM3S9B9x and Tiva C series, but DB-LM3S811 relies on UART or SSI for external communication.
What are the power supply requirements for DB-LM3S811?
The DB-LM3S811 requires three separate supply domains: VDD (1.8–3.6 V for digital I/O), VDDA (1.8–3.6 V for analog circuitry), and VDDC (1.2 V for core logic, supplied via internal regulator from VDD). GNDA and GNDC must be connected to quiet ground planes to maintain ADC accuracy and PLL stability.
Can DB-LM3S811 execute code directly from RAM?
Yes, the DB-LM3S811 supports XIP (execute-in-place) from flash and also allows loading and executing application code from its 24 KB on-chip SRAM. This capability is used for firmware updates, time-critical ISR routines, or debugging scenarios where flash reprogramming is undesirable - enabled via vector table relocation and memory map configuration in the SCB register space.
Is the DB-LM3S811 pin-compatible with other LM3S devices?
No, DB-LM3S811 is not pin-compatible with other LM3S variants such as LM3S3748 or LM3S8962. While all LM3S parts use LQFP-48 packaging, pin assignments differ significantly - for example, ADC input channels, PWM outputs, and UART signals occupy different pins across models. Migration requires PCB layout revision and firmware pin-mapping updates.
DB-LM3S811 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Accessory Type:
- Daughter Board
- For Use With/Related Products:
- LM3S811, LM3S315, LM3S316, LM3S611, LM3S613
DB-LM3S811 FAQ
1.How can I place an order for DB-LM3S811 through Aetrix?
Please submit a Request for Quotation (RFQ) for DB-LM3S811 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 DB-LM3S811 reliable?
The price and inventory of DB-LM3S811 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DB-LM3S811 is usually 5 days.
3.What payment methods are accepted for DB-LM3S811?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DB-LM3S811 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DB-LM3S811?
DB-LM3S811 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DB-LM3S811 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 DB-LM3S811?
For technical support, including DB-LM3S811 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DB-LM3S811 requirements.
6.How does Aetrix verify that DB-LM3S811 is sourced from the original manufacturer or authorized distributors?
All DB-LM3S811 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 DB-LM3S811 meets industry standards.
7.What is the process for return or replacement of DB-LM3S811?
All DB-LM3S811 units undergo pre-shipment inspection (PSI). If there is an issue with DB-LM3S811, 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 DB-LM3S811 part is unused and in its original packaging.
Return procedure for DB-LM3S811:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DB-LM3S811 Tags
-
261
Adafruit Industries LLC
-
5385
Adafruit Industries LLC
-
FIT0587
DFRobot
-
PRT-14427
SparkFun Electronics
-
PRT-10474
SparkFun Electronics
-
PRT-15109
SparkFun Electronics
-
PRT-11417
SparkFun Electronics
-
FIT0586
DFRobot
-
1131
Adafruit Industries LLC
-
MIKROE-485
MikroElektronika
-
2223
Adafruit Industries LLC
-
PRT-14017
SparkFun Electronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
