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Texas Instruments LM3S5632-IQR50-A0T
- Part No.:
- LM3S5632-IQR50-A0T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
LM3S5632-IQR50-A0T.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,137
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Product details
Overview
LM3S5632-IQR50-A0T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated ADC (12-bit, 1 MSPS), dual UARTs, SSI, I²C, PWM, and hibernation module - designed for real-time industrial control and motor drive applications requiring low-power operation and deterministic interrupt response.
For engineers reviewing the LM3S5632-IQR50-A0T datasheet, LM3S5632-IQR50-A0T pinout, LM3S5632-IQR50-A0T application, or LM3S5632-IQR50-A0T equivalent, key selection criteria include its 50 MHz CPU clock, hibernation mode with RTC and battery-backed memory, 12-channel μDMA, GPIO interrupt masking per pin, and support for Thumb-2 instruction set in QFP100 package.
Technical Context
The LM3S5632-IQR50-A0T implements the ARM Cortex-M3 core with NVIC supporting up to 64 interrupts, 3-level priority grouping, and tail-chaining for sub-12-cycle interrupt latency. It integrates a hibernation module with dedicated 32.768 kHz RTC oscillator, battery-switchover circuitry, and 2 KB of battery-backed SRAM.
Peripherals include two UARTs with IrDA/SIR support, one SSI (SPI/SSI/Microwire), one I²C master/slave controller, eight 16-bit GPTM timers (with PWM and input capture), and a 12-bit 1-MSPS ADC with four sample sequencers and hardware averaging - all accessible via configurable GPIO pins and μDMA channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max, Thumb-2 instruction set - enables compact code size and deterministic real-time execution. |
| Memory | 256 KB on-chip flash (with 128-bit wide interface), 64 KB SRAM - supports firmware updates and real-time data buffering without external memory. |
| ADC | 12-bit, 1 MSPS, 8-channel SAR ADC with four independent sample sequencers and hardware averaging - suitable for precision analog sensing in motor control loops. |
| Hibernation | Dedicated hibernation module with RTC, battery backup, and 2 KB battery-backed SRAM - enables ultra-low-power wake-on-event operation down to 1.8 µA. |
| Timers | Eight 16-bit general-purpose timers (GPTM), configurable as 32-bit pairs, with PWM, input edge timing/counting, and RTC modes - provides flexible timing for motor commutation and sensor synchronization. |
| Communication | 2× UART (IrDA/SIR), 1× SSI (SPI/SSI/Microwire), 1× I²C - enables robust serial connectivity to sensors, displays, and host controllers in industrial environments. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard surface-mount assembly and offers full peripheral pin access. |
Pinout & Package
LM3S5632-IQR50-A0T is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with exposed thermal pad, RoHS-compliant, and rated for industrial temperature range (–40°C to +85°C).
| 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 stability. |
| GND, GNDA, GNDC | Ground returns | Dedicated analog (GNDA) and core (GNDC) grounds reduce coupling noise in mixed-signal operation. |
| OSC0, OSC1 | External crystal oscillator terminals | Supports 1–25 MHz crystal or external clock source for main system clock generation. |
| HIB, RTCCLK, HIBRST | Hibernation module interface | Enable battery-backed RTC operation, hibernate entry/exit, and wake-up event detection. |
| PA0–PA7, PB0–PB7, etc. | Configurable GPIO banks | 100-pin package exposes 64 GPIOs across 8 ports, each with programmable pull-up/down, slew rate, and interrupt masking. |
Key Features
| Feature | Design Value |
|---|---|
| μDMA controller | 8-channel micro-DMA with scatter-gather support - offloads CPU during high-bandwidth peripheral transfers (e.g., ADC-to-memory bursts). |
| Nested Vectored Interrupt Controller (NVIC) | 64 interrupt lines with 3-bit priority grouping and tail-chaining - ensures sub-12-cycle interrupt latency for time-critical motor control events. |
| Hibernation module | Integrated RTC, battery switchover, and 2 KB battery-backed SRAM - enables autonomous wake-up from <2 µA sleep current without external components. |
| Peripheral register protection | GPIO commit registers and write-protected clock gating - prevents accidental peripheral disable or configuration corruption during runtime. |
| ROM-based StellarisWare drivers | On-chip ROM contains certified peripheral drivers (UART, SSI, ADC, SysTick) - reduces flash footprint and accelerates firmware development. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop BLDC motor control in HVAC blowers with real-time current sensing and commutation timing. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, managing PWM outputs, sampling ADC at 100 kSPS, and synchronizing timer-triggered ADC conversions. Use Value: Deterministic 50 MHz Cortex-M3 execution, 8-channel μDMA for zero-CPU ADC transfers, and hibernation-ready RTC for scheduled maintenance wake-ups. | Use Scenario: Battery-powered environmental sensor hub collecting temperature, humidity, and pressure data every 15 minutes. IC Role / Device Role / Timing Role: System-on-chip managing sensor I²C reads, local data processing, UART logging, and deep-sleep scheduling. Use Value: 1.8 µA hibernation current with RTC alarm wake-up, on-chip 256 KB flash for firmware+logs, and integrated ADC eliminating external signal conditioning. |
| Programmable Logic Controller (PLC) I/O Module | Medical Infusion Pump Controller |
Use Scenario: DIN-rail mounted I/O expansion module with isolated digital inputs, relay outputs, and Modbus RTU over UART. IC Role / Device Role / Timing Role: Real-time I/O coordinator handling input debouncing, output sequencing, UART protocol stack, and watchdog supervision. Use Value: Dual UARTs with IrDA support for diagnostics, GPIO interrupt masking per pin for fast edge detection, and ROM-based driver library for certified Modbus implementation. | Use Scenario: Safety-critical infusion pump requiring precise flow rate control, fault monitoring, and battery backup during AC loss. IC Role / Device Role / Timing Role: Primary safety controller managing stepper motor timing, pressure sensor ADC, door interlock monitoring, and hibernation-mode battery switchover. Use Value: Hardware-enforced hibernation with battery-backed SRAM retaining therapy state, independent watchdog timer, and separate analog/digital ground planes for EMI resilience. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S8962-IQR50-A0T | Same core and peripherals, but adds Ethernet MAC + PHY and 1 MB flash - larger die, higher power, no hibernation module. | Suitable for networked industrial gateways; not appropriate for ultra-low-power battery operation. | Select LM3S5632-IQR50-A0T when hibernation, RTC, and low active/sleep current are required - avoid LM3S8962 if Ethernet is unused. |
| TM4C123GH6PM | Successor family with same pinout, 80 MHz Cortex-M4F, FPU, enhanced ADC (12-bit, 3 MSPS), and updated hibernation logic. | Enables floating-point math for advanced control algorithms and higher sampling rates - requires firmware migration. | Choose TM4C123GH6PM for new designs needing performance headroom or FPU; LM3S5632-IQR50-A0T remains valid for legacy cost-optimized or qualification-stable deployments. |
Compared with LM3S8962-IQR50-A0T and TM4C123GH6PM, the LM3S5632-IQR50-A0T delivers optimal balance of deterministic real-time response, ultra-low hibernation current (<2 µA), and mature industrial qualification - making it ideal for battery-backed control nodes where Ethernet or FPU are unnecessary overhead.
Availability
LM3S5632-IQR50-A0T is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and medical infusion pump controllers requiring stable component supply and long-term lifecycle assurance.
Supply support for LM3S5632-IQR50-A0T 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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience in industrial, automotive, and medical applications.
The Stellaris LM3S series was engineered specifically for deterministic real-time control in resource-constrained industrial systems - emphasizing low-latency interrupt handling, integrated analog peripherals, and ultra-low-power hibernation for battery-backed operation.
FAQ
What is the maximum operating frequency of the LM3S5632-IQR50-A0T?
The LM3S5632-IQR50-A0T operates at a maximum CPU clock frequency of 50 MHz, derived from its internal PLL locked to an external crystal (1–25 MHz) or oscillator input. This frequency is fully supported across the industrial temperature range (–40°C to +85°C) and enables deterministic execution of real-time control tasks such as motor commutation and sensor sampling. The LM3S5632-IQR50-A0T maintains timing compliance under worst-case voltage and temperature conditions per TI's production data sheet SPMS087H.
Does the LM3S5632-IQR50-A0T support hardware debug interfaces?
Yes, the LM3S5632-IQR50-A0T includes a JTAG-DP (Debug Port) interface compliant with IEEE 1149.1, supporting full boundary-scan testing and real-time debugging via SWD or JTAG protocols. It integrates ARM CoreSight components including the Debug Access Port (DAP), allowing breakpoints, watchpoints, and memory inspection during development. The LM3S5632-IQR50-A0T does not require external debug circuitry - debug signals are routed directly to dedicated TCK/TMS/TDI/TDO pins in its 100-pin LQFP package.
What is the purpose of the hibernation module in the LM3S5632-IQR50-A0T?
The hibernation module in the LM3S5632-IQR50-A0T provides ultra-low-power operation with autonomous wake-up capability using a dedicated 32.768 kHz RTC oscillator, battery switchover circuitry, and 2 KB of battery-backed SRAM. It allows the LM3S5632-IQR50-A0T to enter a sub-2 µA sleep state while preserving critical context and maintaining accurate timekeeping - essential for battery-powered sensor nodes or maintenance-scheduled industrial equipment. Wake-up sources include RTC match, external GPIO, or HIB interrupt.
How many ADC channels does the LM3S5632-IQR50-A0T support, and what is its sampling rate?
The LM3S5632-IQR50-A0T features a single 12-bit successive-approximation ADC with up to 8 external input channels and 1 internal temperature sensor channel. Its maximum sampling rate is 1 million samples per second (1 MSPS), achievable in burst mode using hardware sequencers and μDMA. The LM3S5632-IQR50-A0T supports four independent sample sequencers - enabling simultaneous triggering of multiple analog measurements with programmable timing and hardware averaging - critical for motor current and voltage monitoring.
Is the LM3S5632-IQR50-A0T pin-compatible with other Stellaris devices?
No, the LM3S5632-IQR50-A0T is not universally pin-compatible across the Stellaris family. While it shares the 100-pin LQFP package with several LM3S variants (e.g., LM3S811, LM3S8962), pin functions differ significantly due to peripheral set variations - for example, hibernation-related pins (HIB, RTCCLK) are unique to hibernation-capable parts like the LM3S5632-IQR50-A0T. Direct replacement requires verification of signal mapping, power domain routing, and peripheral enablement in the target design.
LM3S5632-IQR50-A0T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 5000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- CANbus, I2C, IrDA, Microwire, SPI, SSI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 33
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- A/D 6x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S5632-IQR50-A0T FAQ
1.How can I place an order for LM3S5632-IQR50-A0T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S5632-IQR50-A0T 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 LM3S5632-IQR50-A0T reliable?
The price and inventory of LM3S5632-IQR50-A0T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S5632-IQR50-A0T is usually 5 days.
3.What payment methods are accepted for LM3S5632-IQR50-A0T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S5632-IQR50-A0T transactions.
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LM3S5632-IQR50-A0T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S5632-IQR50-A0T 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 LM3S5632-IQR50-A0T?
For technical support, including LM3S5632-IQR50-A0T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S5632-IQR50-A0T requirements.
6.How does Aetrix verify that LM3S5632-IQR50-A0T is sourced from the original manufacturer or authorized distributors?
All LM3S5632-IQR50-A0T 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 LM3S5632-IQR50-A0T meets industry standards.
7.What is the process for return or replacement of LM3S5632-IQR50-A0T?
All LM3S5632-IQR50-A0T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S5632-IQR50-A0T, 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 LM3S5632-IQR50-A0T part is unused and in its original packaging.
Return procedure for LM3S5632-IQR50-A0T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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