ATSAML11E14A-MU - 32MHz Cortex-M23 TrustZone MCU 16KB Flash | Microchip
MPN: ATSAML11E14A-MU ✓ Hoạt độngATSAML11E14A-MU Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and peripherals. Within the embedded hierarchy, the ATSAML11E14A-MU is an ARM Cortex-M23 core -> Cortex-M family -> 32-bit RISC processor -> embedded MCU -> semiconductor. The Cortex-M23 is the smallest and most energy-efficient ARMv8-M core, designed for IoT edge nodes that benefit from TrustZone-M for firmware isolation.
Key features include ARM TrustZone-M hardware isolation, secure boot with secure key storage, chip-level tamper resistance, and a True Random Number Generator (TRNG). Active-mode current is under 25 uA/MHz, and sleep-mode current drops below 100 nA, making the device suitable for battery-powered applications. The part supports 1.6V to 3.6V supply operation and includes a 32-bit Cortex-M23 core, 16 KB Flash, 8 KB SRAM, and a 32-pin VQFN package with an exposed thermal pad.
From an architectural standpoint, the SAM L11 integrates a Cortex-M23 core, a separate Cortex-M0+ core dedicated to secure-boot firmware, on-chip voltage regulation, and a TrustZone-aware bus matrix. The crypto block includes AES, SHA, and secure key storage; the peripheral set includes SERCOM, ADC, DAC, and timers. Together, these features provide defense-grade security at sub-dollar BOM cost.
Typical applications include IoT end nodes, secure sensor hubs, smart utility meters, medical wearables, and HomeKit/Zigbee/Thread/BLE bridge devices. For each use case, the MCU balances low active current, hardware-enforced secure/non-secure isolation, and a small 5x5 mm footprint.
When designing with the ATSAML11E14A-MU, allocate the secure region in the linker script and configure the TrustZone Attribution Unit (TAU) before non-secure code is generated. Use MPLAB X IDE with MCC harmony for peripheral configuration, and observe VDD decoupling guidelines from the SAM L11 datasheet.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a one-stop view of the part's value proposition.
Bộ thay thế dễ dàng lắp đặt cho ATSAML11E14A-MU — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATSAML11E14A-MU (cùng hình factor và footprint) — khác nhau ở Package, Core, Flash Memory, Operating Temperature, Core Architecture.
ATSAML11E15A-MU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML11E14A-MUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML11D14A-MUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML11E14A-AUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML11D15A-MU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML10E16A-MU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML11E14A-MU Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M23 |
| Core Architecture | ARMv8-M (TrustZone-M) |
| Tần số xung maksimum | 32 MHz |
| Program Memory Size | 16 KB (16K x 8) Flash |
| RAM Size | 8 KB |
| Supply Voltage Range | 1.6 V to 3.6 V |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C |
| Hộp | 32-pin VQFN (5x5 mm) with Exposed Pad |
| Kiểu lắp đặt | Surface Mount |
| I/O Pins | 25 |
| Active Mode Current | < 25 uA/MHz |
| Sleep Mode Current | < 100 nA |
| Connectivity | I2C, LINbus, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Security Features | ARM TrustZone-M, secure boot, secure key storage, TRNG, tamper detection |
| Cấp MSL | MSL3 |
| Trạng thái RoHS | Compliant |
Cấu hình chân ATSAML11E14A-MU
| Chân 1 | PA00 — GPIO / XIN (external clock input) |
| Chân 2 | PA01 — GPIO / XOUT (external clock output) |
| Chân 3 | GND — Ground |
| Chân 4 | VDDIO — Digital I/O supply voltage |
| Chân 5 | VDDIN — Main supply voltage input |
| Chân 6 | PA02 — GPIO / AIN[0] (ADC input) |
| Chân 7 | PA03 — GPIO / AIN[1] (ADC input) / VREFA reference |
| Chân 8 | PA04 — GPIO / AIN[2] / TC[0] WO[0] |
| Chân 9 | PA05 — GPIO / AIN[3] |
| Chân 10 | PA06 — GPIO / AIN[4] / SERCOM0 PAD[0] |
| Chân 11 | PA07 — GPIO / AIN[5] / SERCOM0 PAD[1] |
| Chân 12 | PA08 — GPIO / AIN[6] / NMI (non-maskable interrupt) |
| Chân 13 | PA09 — GPIO / AIN[7] |
| Chân 14 | PA10 — GPIO / AIN[8] / SERCOM0 PAD[2] |
| Chân 15 | PA11 — GPIO / AIN[9] / SERCOM0 PAD[3] |
| Chân 16 | PA14 — GPIO / XIN32 / SERCOM2 PAD[2] |
| Chân 17 | PA15 — GPIO / XOUT32 / SERCOM2 PAD[3] |
| Chân 18 | PA16 — GPIO / SERCOM1 PAD[0] / I2S FS |
| Chân 19 | PA17 — GPIO / SERCOM1 PAD[1] / I2S SCK |
| Chân 20 | PA18 — GPIO / SERCOM1 PAD[2] / I2S MCK |
| Chân 21 | PA19 — GPIO / SERCOM1 PAD[3] / I2S SDO |
| Chân 22 | PA20 — GPIO / SERCOM3 PAD[0] |
| Chân 23 | PA21 — GPIO / SERCOM3 PAD[1] |
| Chân 24 | PA22 — GPIO / SERCOM3 PAD[2] |
| Chân 25 | PA23 — GPIO / SERCOM3 PAD[3] |
| Chân 26 | PA24 — GPIO / USB DP (USB data plus) |
| Chân 27 | PA25 — GPIO / USB DN (USB data minus) |
| Chân 28 | PA27 — GPIO / TC[1] WO[0] |
| Chân 29 | RESET — Reset input (active low) |
| Chân 30 | SWDIO — Debug data |
| Chân 31 | SWCLK — Debug clock |
| Chân 32 | VDDCORE — Internal core voltage (decoupling cap) |
| Chân EP | Exposed Pad — Must be soldered to ground for thermal dissipation |
Ứng dụng tiêu biểu
ATSAML11E14A-MU phù hợp cho 6 Áp dụngs: IoT Edge Nodes with Secure Boot, Smart Utility Meters (Gas/Water/Electric), Wearable Medical Devices, HomeKit/Zigbee/Thread Bridge Devices, Battery-Powered Sensor Hubs, Secure Access Control / Smart Locks.
IoT Edge Nodes with Secure Boot
The ATSAML11E14A-MU is purpose-built for IoT edge nodes that require hardware-isolated secure firmware. Its ARM TrustZone-M creates an isolated secure domain for bootloaders and key storage, while non-secure application code runs in a separate memory region that cannot read or modify secure assets. With under 25 uA/MHz active current and sub-100 nA sleep current, the part enables multi-year battery life on coin cells. The 16 KB Flash is sufficient for Thread/Zigbee/BLE stacks when paired with an external radio. A reference design (AN2841) walks through provisioning secure keys via the TrustZone Attribution Unit.
Được đề xuất
Smart Utility Meters (Gas/Water/Electric)
Smart meters need tamper detection, secure key storage, and ultra-low standby current to meet 10-20 year battery life. The ATSAML11E14A-MU integrates chip-level tamper detection pins and a hardware TRNG for cryptographic metering keys. The Cortex-M23 at 32 MHz handles DLMS/COSEM or wireless M-Bus protocol stacks, while the SERCOM peripherals drive UART/I2C/SPI interfaces to metrology ADCs. The 1.6-3.6 V supply range accommodates single-cell Li-SOCl2 batteries. Reference firmware is available in the Atmel START / MPLAB Harmony ecosystem.
Được đề xuất
Wearable Medical Devices
Wearable medical patches and continuous glucose monitors require IEC 62304-considered firmware isolation, sub-100 nA standby current, and a tiny footprint. The ATSAML11E14A-MU delivers TrustZone-M isolation between safety-critical and non-critical code, a 5x5 mm VQFN package for thin-form-factor PCB integration, and ultra-low sleep current suitable for body-worn patches. The on-chip 12-bit ADC and DAC enable direct biosensor interfacing without external converters. The -40C to +85C temperature range covers skin and body-worn operating conditions.
Được đề xuất
HomeKit/Zigbee/Thread Bridge Devices
Smart-home hubs and bridges benefit from the ATSAML11E14A-MU's hardware root-of-trust and small footprint. The Cortex-M23 core can run a Thread/Zigbee/BLE stack with secure commissioning using the TrustZone-M isolated region for storing commissioning keys. The 32-pin VQFN layout keeps the MCU footprint under 25 mm² on the bridge PCB, leaving room for the radio module. The integrated DMA and 25 GPIO pins support multiple sensor inputs and RGB indicator LEDs on the bridge.
Được đề xuất
Battery-Powered Sensor Hubs
Industrial sensor hubs that aggregate data from multiple field sensors need long battery life, hardware-accelerated crypto, and small PCB area. The ATSAML11E14A-MU consumes less than 25 uA/MHz in active mode and less than 100 nA in standby, suiting 5-10 year battery life targets. The integrated AES and SHA blocks accelerate TLS handshakes without loading the Cortex-M23 core. The 25 GPIO pins provide ample connectivity for I2C/SPI sensor clusters and digital IO. The 1.6 V minimum supply allows direct operation from a single alkaline cell.
Được đề xuất
Secure Access Control / Smart Locks
Smart locks and access controllers need secure key storage, tamper detection, and reliable BLE/Zigbee connectivity. The ATSAML11E14A-MU's TrustZone-M isolates the BLE pairing keys and the tamper-detection firmware from the main application, preventing firmware-side attacks. The Cortex-M23 at 32 MHz handles BLE radio control via SERCOM and crypto operations via the on-chip AES accelerator. The wide 1.6-3.6 V supply range accommodates 4xAA or single-cell Li-ion battery packs. The exposed pad provides thermal relief for continuous RF transmission.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAML11E14A-MU — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATSAML11E15A-MU | ATSAML11E14A-MUT | ATSAML11D14A-MUT | ATSAML10E16A-MU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-pin VQFN (5x5 mm) | 32-pin VQFN (5x5 mm) - same | 32-pin VQFN (5x5 mm) - same | 32-pin VQFN (5x5 mm) - same | 32-pin VQFN (5x5 mm) - same |
| Core | ARM Cortex-M23 (32 MHz) | ARM Cortex-M23 (32 MHz) | ARM Cortex-M23 (32 MHz) | ARM Cortex-M23 (32 MHz) | ARM Cortex-M23 (32 MHz) |
| Flash | 16 KB | 32 KB (+100%) | 16 KB (same) | 16 KB (same) | 32 KB (+100%) |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| TrustZone-M Hardware Isolation | Yes | Yes | Yes | Yes | No (SAM L10 family) |
| Secure Boot / Key Storage | Yes | Yes | Yes | Yes | No |
| Supply Voltage | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V |
Bảo phân biệt quan trọng
- Only Microchip Cortex-M23 with TrustZone-M hardware isolation (vsATSAML10E16A-MU)
- Industry's lowest-power Cortex-M23 with sub-25 uA/MHz active (vsATSAML11E14A-MUT)
- Doubles Flash without changing the PCB footprint (vsATSAML11E15A-MU)
Ghi chú thiết kế
The ATSAML11E14A-MU integrates a 1.2 V core LDO that derives from VDDIN (1.6-3.6 V). Decouple VDDIN with 1 uF + 100 nF X7R ceramics placed within 2 mm of the pin, and place a 1 uF X7R cap on VDDCORE (pin 32) for the internal regulator. In sleep mode, the part draws less than 100 nA with full RAM retention, which is critical for coin-cell battery life. Estimated: assuming a CR2032 (220 mAh) and 100 nA standby, the standby life exceeds 250 years. Use the Power Manager (PM) peripheral to gate unused peripherals.
The 32-pin VQFN package has an exposed thermal pad (pin EP) that must be soldered to a continuous ground copper pour for both electrical grounding and thermal dissipation. Without the EP soldered, junction-to-ambient thermal resistance rises sharply, and the device may throttle or trigger thermal shutdown under sustained Cortex-M23 + crypto load. Estimated: with 25 mm^2 of 1 oz copper on the EP, theta_JA is approximately 38 C/W; without EP soldering, theta_JA exceeds 100 C/W.
Place the SWDIO (pin 30) and SWCLK (pin 31) traces as short as possible (under 50 mm) and avoid crossing them with high-current or high-frequency signals to prevent debug probe noise. The RESET (pin 29) requires a 10 kOhm pull-up to VDDIO and a 1 nF cap to ground for noise immunity. Route the SERCOM and ADC analog signals on the inner PCB layers with a continuous ground reference plane below for signal integrity.
Do not skip TrustZone Attribution Unit (TAU) configuration in the linker script before generating non-secure code - the secure region must be locked before the first non-secure call or the security boundary is meaningless. The 16 KB Flash region is split between secure and non-secure; allocating too much to the secure bootloader leaves little for application code. Always program the user row (NVM bits) with the BOOTPROT and SECUMASK settings before production. The Cortex-M23 vector table offset register (VTOR) must point to the non-secure alias for application code.
The ATSAML11E14A-MU SERCOM peripherals support I2C, SPI, and UART modes with configurable drive strength. For I2C buses exceeding 100 kHz with multiple slaves, use 4.7 kOhm pull-ups (not 10 kOhm) to meet the rise-time spec. The 12-bit ADC has 1 MSPS throughput but is sensitive to digital switching noise; sample AIN inputs during DMA-driven modes and avoid sampling during active Cortex-M23 interrupt bursts. Add a 100 nF cap directly on each AIN pin used.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. AEC-Q100 not applicable - SAM L11 is not automotive-grade. For automotive applications, choose SAM S70/V70/V71 or ATSAMx automotive variants.
