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STMicroelectronics STM32L4A6RGT6
- Part No.:
- STM32L4A6RGT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L4A6RGT6.pdf
- Description:
- IC MCU 32BIT 1MB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,101
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Product details
Overview
STM32L4A6RGT6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 1 MB flash, 320 KB SRAM, USB OTG FS, AES+HASH crypto acceleration, and integrated SMPS support. It targets battery-powered industrial sensors, portable medical devices, and audio-enabled IoT edge nodes requiring high integration and sub-µA standby operation.
For engineers reviewing the STM32L4A6RGT6 datasheet, STM32L4A6RGT6 pinout, STM32L4A6RGT6 application, or STM32L4A6RGT6 equivalent, key selection criteria include its 2.57 µA Stop 2 mode, 37 µA/MHz SMPS-run efficiency, dual-bank flash for seamless firmware updates, Chrom-ART Accelerator for GUI rendering, and hardware-accelerated SHA-256/AES-256 for secure firmware authentication.
Technical Context
The STM32L4A6RGT6 implements an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 80 MHz, paired with a Memory Protection Unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its power architecture integrates FlexPowerControl with five low-power modes - including 25 nA Shutdown and 426 nA Standby with RTC - managed via dedicated voltage regulator and external SMPS interface.
It features three independent 12-bit ADCs (5 Msps aggregate), two 12-bit DACs, two operational amplifiers with PGA, and two ultra-low-power comparators - all supported by independent analog supply domains. Communication includes dual CAN 2.0B controllers, two SAIs for I²S/TDM audio, LPUART for always-on wake-up, and Quad SPI for external memory expansion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP and control algorithms without external co-processor. |
| Memory | 1 MB dual-bank flash (read-while-write), 320 KB SRAM (64 KB with parity) - supports live firmware updates and safety-critical data integrity. |
| Low-Power Performance | 37 µA/MHz in SMPS-run mode; 426 nA Standby with RTC - extends battery life in multi-year sensor deployments. |
| Crypto Acceleration | AES-128/256 + SHA-256 hardware engine - offloads secure boot, OTA update verification, and TLS stack encryption. |
| Analog Peripherals | 3× 12-bit ADCs (5 Msps total), 2× 12-bit DACs, 2× op-amps with PGA, 2× comparators - enables precision sensor signal chain without external signal conditioning. |
| Connectivity | USB OTG FS, 2× CAN 2.0B, 2× SAI, 5× USART/LPUART, 4× I²C, 3× SPI + Quad SPI - supports mixed wired/wireless gateway architectures with audio and fieldbus interfaces. |
| Package & Pin Count | LQFP64 (10 × 10 mm), 51 GPIOs (most 5 V-tolerant), 14 I/Os with independent 1.08–3.6 V supply - simplifies mixed-voltage board design and reduces level-shifter count. |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, industrial temperature range (–40 °C to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power and ground | Core logic supply (1.71–3.6 V); decoupling required per datasheet layout guidelines for noise immunity. |
| VDDA, VSSA | Analog power and ground | Independent 1.62–3.6 V analog domain - isolates ADC/DAC/OPAMP noise from digital switching. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15 | General-purpose I/O | 51 configurable GPIOs; most tolerate 5 V inputs - enables direct interfacing with legacy peripherals and sensors. |
| PA9/PA10 (USART1_TX/RX) | Asynchronous serial interface | Dedicated UART pins with HW flow control support - suitable for debug console or modem communication. |
| PA11/PA12 (USB_DM/DP) | USB 2.0 Full-Speed physical layer | On-chip transceiver with internal pull-ups - eliminates external USB PHY and reduces BOM cost. |
| PF0–PF1 (OSC_IN/OSC_OUT) | High-speed crystal oscillator input/output | Supports 4–48 MHz external crystal - provides precise system clock for USB timing and audio sampling. |
| PC13–PC15 (RTC_LSE) | Low-speed external oscillator | 32.768 kHz crystal connection for RTC calendar and wake-up timer - maintains timekeeping during VBAT operation. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Five low-power modes (Shutdown/Stop/Standby) with 25 nA shutdown current and 5 µs wakeup - enables rapid response to sensor events while minimizing energy per wake cycle. |
| Chrom-ART Accelerator (DMA2D) | Hardware-accelerated 2D graphics composition - reduces CPU load for GUI rendering in HMI applications, freeing cycles for sensor fusion. |
| Batch Acquisition Mode (BAM) | Peripheral-triggered autonomous data capture without CPU intervention - ideal for periodic sensor logging during deep sleep. |
| Dual-bank flash with ROP | Independent bank erase/program; proprietary readout protection - enables secure over-the-air firmware updates with rollback capability. |
| External SMPS interface | Dedicated VDD12/VDD12_IO pins and control logic - improves system efficiency by >40% vs. LDO-only operation at high current loads. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Wireless temperature/humidity/pressure node deployed in HVAC systems with 10-year battery life requirement. IC Role / Device Role / Timing Role: Main controller executing sensor acquisition, BLE packet formatting, and ultra-low-power scheduling using LPTIM and Stop 2 mode. Use Value: 426 nA Standby with RTC enables precise wake intervals; dual ADCs allow simultaneous multi-sensor sampling without external mux. |
Use Scenario: Handheld ECG/SpO₂ device requiring clinical-grade analog front-end and local waveform analysis. IC Role / Device Role / Timing Role: Signal processor handling 12-bit ADC oversampling, FIR filtering, and real-time arrhythmia detection via Cortex-M4 DSP instructions. Use Value: Hardware-accelerated SHA-256 ensures FDA-compliant firmware signature validation; 320 KB SRAM stores full waveform buffers. |
| Audio Edge Gateway | Smart Building Controller |
Use Scenario: Voice-controlled building access panel with far-field mic array and local keyword spotting. IC Role / Device Role / Timing Role: Audio preprocessor feeding SAI-connected PDM mics into neural network inference on Cortex-M4+FPU. Use Value: Two SAIs support TDM microphone synchronization; Chrom-ART renders UI feedback without frame buffer overhead. |
Use Scenario: DIN-rail mounted controller managing lighting, HVAC, and occupancy sensing across multiple zones. IC Role / Device Role / Timing Role: Fieldbus hub interfacing Modbus RTU (via USART), CAN bus (for actuator control), and SDMMC for local log storage. Use Value: Dual CAN controllers enable redundant fieldbus links; external NAND interface via FSMC supports firmware rollback images. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L476RG | Same Cortex-M4 core, but 1 MB flash / 128 KB SRAM; no SMPS interface or Chrom-ART; lacks second CAN and SAI. | Suitable for non-audio, lower-memory sensor hubs without external power conversion needs. | Select when audio processing, dual CAN, or external SMPS integration is unnecessary - reduces cost and PCB complexity. |
| STM32U575ZIT6 | Higher performance (160 MHz), TrustZone security, 2 MB flash, 784 KB SRAM; 1.5x lower active current (21 µA/MHz) but LQFP144 only. | Targets next-gen secure IoT endpoints requiring PSA-certified firmware and larger code footprint. | Choose for future-proof designs needing PSA Level 3 certification, larger memory, and enhanced crypto (AES-GCM, PKA), accepting larger package and higher cost. |
Compared with STM32L476RG, the STM32L4A6RGT6 adds audio-ready peripherals (SAI, Chrom-ART) and SMPS control for better system-level efficiency; versus STM32U575ZIT6, it offers LQFP64 compactness and proven qualification for cost-sensitive industrial deployments without TrustZone overhead.
Availability
STM32L4A6RGT6 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, audio edge gateways, and smart building controllers requiring stable component supply across multi-year production cycles.
Supply support for STM32L4A6RGT6 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and automotive semiconductors since 1987.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, with the L4A6 variant specifically optimized for audio, graphics, and secure connectivity in resource-constrained edge devices.
FAQ
What is the maximum operating frequency and corresponding DMIPS rating?
The STM32L4A6RGT6 operates at up to 80 MHz with an Adaptive Real-time Accelerator (ART) enabling zero-wait-state flash execution. Its performance is rated at 100 DMIPS (Dhrystone 2.1), validated at 80 MHz with ART enabled and cache configured per ST's benchmark conditions. This delivers deterministic real-time response for motor control, sensor fusion, and audio processing tasks.
Does this MCU support hardware cryptographic acceleration, and which algorithms are implemented?
Yes, the STM32L4A6RGT6 integrates dedicated hardware accelerators for AES-128 and AES-256 encryption/decryption, plus SHA-256 hashing. These engines operate independently of the CPU, reducing latency for secure boot, firmware signature verification, and TLS handshake operations. No software library substitution is needed - all functions are accessible via standard HAL drivers and documented in RM0351 reference manual.
What low-power modes are available, and what is the lowest achievable current draw?
The MCU supports five low-power modes: Shutdown (25 nA), Standby (108 nA), Standby with RTC (426 nA), Stop 2 (2.57 µA), and Stop 2 with RTC (2.86 µA). The 25 nA Shutdown current is measured with VBAT powered and all clocks disabled except for the RTC backup domain. Wakeup sources include EXTI lines, RTC alarms, and tamper events - all configurable without CPU involvement.
Can the STM32L4A6RGT6 drive an LCD display, and what resolution is supported?
Yes, it integrates an LCD controller supporting up to 8×40 or 4×44 segments with built-in step-up converter, eliminating external bias generation. It drives static, multiplexed (1/2, 1/3, 1/4, 1/8 duty), and COM/SEG-based monochrome displays. No external glass driver IC is required for basic segment LCDs used in industrial HMIs, metering displays, or medical device status panels.
STM32L4A6RGT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32L4
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 80MHz
- Connectivity:
- CANbus, EBI/EMI, I2C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART, USB OTG
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, PWM, WDT, (External SMPS Required)
- Number of I/O:
- 52
- Program Memory Size:
- 1MB (1M x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 320K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L4A6RGT6 FAQ
1.How can I place an order for STM32L4A6RGT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L4A6RGT6 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 STM32L4A6RGT6 reliable?
The price and inventory of STM32L4A6RGT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L4A6RGT6 is usually 5 days.
3.What payment methods are accepted for STM32L4A6RGT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L4A6RGT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L4A6RGT6?
STM32L4A6RGT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L4A6RGT6 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 STM32L4A6RGT6?
For technical support, including STM32L4A6RGT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L4A6RGT6 requirements.
6.How does Aetrix verify that STM32L4A6RGT6 is sourced from the original manufacturer or authorized distributors?
All STM32L4A6RGT6 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 STM32L4A6RGT6 meets industry standards.
7.What is the process for return or replacement of STM32L4A6RGT6?
All STM32L4A6RGT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L4A6RGT6, 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 STM32L4A6RGT6 part is unused and in its original packaging.
Return procedure for STM32L4A6RGT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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