ATSAML11E16A-AU - 32MHz Cortex-M23 64KB MCU | Microchip
MPN： ATSAML11E16A-AU ✓ 啟用中ATSAML11E16A-AU 概覽
An ARM Cortex-M23 microcontroller is a 32-bit processor core built on the ARMv8-M baseline architecture, optimized for energy-efficient embedded applications. It sits below the Cortex-M3 in performance but adds optional TrustZone-M for hardware-isolated secure firmware regions. The SAM L11 family from Microchip is the first commercial Cortex-M23 implementation to integrate TrustZone-M, secure boot, and a hardware AES/SHA crypto accelerator on die. Within the broader taxonomy, the part belongs to microcontrollers -> 32-bit MCUs -> ARM Cortex-M -> Cortex-M23 -> low-power secure MCUs -> power management hierarchy.
Key differentiating specifications include the TrustZone-M isolation engine, on-die crypto accelerators (AES, SHA, TRNG), 64 KB Flash with secure storage partitioning, 16 KB SRAM, six SERCOM interfaces configurable as UART/SPI/I2C, a 12-bit ADC, 10-bit DAC, analog comparator, and PTC (Peripheral Touch Controller) for capacitive touch sensing. The part also includes a Self-Programmable Flash with read-while-write support and a 32 kHz RTC with calendar mode.
Technically, the SAM L11 uses a single-cycle hardware multiplier and hardware divider for deterministic interrupt latency. The Cortex-M23 core delivers up to 31 DMIPS at 32 MHz. Sleep current below 100 nA is achieved via three power domains (PD0/PD1/PD2) and a backup domain with RTC. The 1.62V to 3.63V operating range supports direct Li-ion and 3.3V regulated rails.
Typical applications include IoT sensor nodes, secure wearables, smart metering, medical sensor patches, building automation endpoints, and battery-powered HMI with capacitive touch. The 85C ceiling suits indoor industrial enclosures, consumer appliances, and commercial IoT gateways.
When designing with the ATSAML11E16A-AU, ensure the secure key storage region is provisioned during initial flash programming and that the NRST line has the required 10 kohm pull-up. TrustZone-M secure/non-secure partitioning must be configured before user code execution; tools like MPLAB Harmony v3 and Atmel Studio 7 simplify this.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet summary, including same-package pin-to-pin MCU replacements drawn from the Microchip SAM L11 family.
直接替換替代品，適用於 ATSAML11E16A-AU — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATSAML11E16A-AU （相同外形與佔位） — 差異在於 ADC, Core, Package, Active Current, Operating Temperature.
ATSAML11E16A-AUT
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAML11E15A-AUKPH
✅ 直接替換聯絡詢價
查看資料表 →ATSAML10E16A-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAML11E14A-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAML11D16A-MFT
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAML11E15A-AUT
✅ 直接替換聯絡詢價
查看資料表 →ATSAML11E16A-AU 最大額定值與電氣特性
| Core | ARM Cortex-M23 with TrustZone-M |
| 最大時脈頻率 | 32 MHz |
| CoreMark per MHz | 2.62 |
| DMIPS | Up to 31 DMIPS |
| Program Memory (Flash) | 64 KB |
| SRAM | 16 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Active Current | < 25 uA/MHz |
| Sleep Current | < 100 nA |
| 工作溫度 | -40C to +85C |
| 封裝 | 32-pin TQFP (7x7 mm) |
| 安裝類型 | Surface Mount |
| ADC | 12-bit |
| DAC | 10-bit |
| Crypto Accelerators | AES, SHA, TRNG on-die |
| Communication Interfaces | SERCOM (configurable UART/SPI/I2C) |
| Capacitive Touch | PTC (Peripheral Touch Controller) |
| Hardware Multiplier | Single-cycle |
| MSL 等級 | 3 (168 hours) |
| RoHS 狀態 | Compliant |
ATSAML11E16A-AU 腳位配置
| 腳位 1 | PA00 — General purpose I/O, SERCOM alternative |
| 腳位 2 | PA01 — General purpose I/O, SERCOM alternative |
| 腳位 3 | PA02 — AIN[0] / DAC output / general purpose I/O |
| 腳位 4 | PA03 — AIN[1] / general purpose I/O |
| 腳位 5 | GND — Ground reference |
| 腳位 6 | VDD — Digital supply voltage (1.62V-3.63V) |
| 腳位 7 | PA04 — AIN[2] / general purpose I/O |
| 腳位 8 | PA05 — AIN[3] / general purpose I/O |
| 腳位 9 | PA06 — AIN[4] / general purpose I/O |
| 腳位 10 | PA07 — AIN[5] / general purpose I/O |
| 腳位 11 | PA08 — AIN[6] / SERCOM alternative / PTC |
| 腳位 12 | PA09 — AIN[7] / SERCOM alternative / PTC |
| 腳位 13 | PA10 — AIN[8] / SERCOM alternative / PTC |
| 腳位 14 | PA11 — AIN[9] / SERCOM alternative / PTC |
| 腳位 15 | PA14 — XOUT / general purpose I/O |
| 腳位 16 | PA15 — XIN / general purpose I/O |
| 腳位 17 | PA16 — SERCOM / PTC / general purpose I/O |
| 腳位 18 | PA17 — SERCOM / PTC / general purpose I/O |
| 腳位 19 | PA18 — SERCOM / PTC / general purpose I/O |
| 腳位 20 | PA19 — SERCOM / PTC / general purpose I/O |
| 腳位 21 | PA20 — SERCOM / PTC / general purpose I/O |
| 腳位 22 | PA21 — SERCOM / PTC / general purpose I/O |
| 腳位 23 | PA22 — SERCOM / PTC / general purpose I/O |
| 腳位 24 | PA23 — SERCOM / PTC / general purpose I/O |
| 腳位 25 | PA24 — SERCOM / PTC / general purpose I/O |
| 腳位 26 | PA25 — SERCOM / PTC / general purpose I/O |
| 腳位 27 | PA27 — SERCOM / PTC / general purpose I/O |
| 腳位 28 | NRST — Reset input (active low) |
| 腳位 29 | VDDIO — I/O supply voltage |
| 腳位 30 | GND — Ground reference |
| 腳位 31 | SWCLK — Serial Wire Debug clock |
| 腳位 32 | SWDIO — Serial Wire Debug data |
典型應用
ATSAML11E16A-AU 適用於 6 應用s: IoT Secure Sensor Node, Battery-Powered Wearable Health Patch, Smart Meter Endpoint, Capacitive Touch HMI, Building Automation Sensor, Industrial Wireless Sensor Transmitter.
IoT Secure Sensor Node
The ATSAML11E16A-AU fits IoT secure sensor nodes because its sub-100 nA sleep current and TrustZone-M hardware isolation allow multi-year coin-cell operation while protecting firmware and identity. The 12-bit ADC reads thermistor, pressure, or environmental sensors directly; six SERCOM ports drive SPI sensors, I2C peripherals, and UART modems concurrently. On-die AES-128 and SHA-256 accelerators offload TLS handshake compute from the Cortex-M23 core. Compared to discrete secure-element + MCU solutions, the integrated design shrinks BOM by 50% and PCB area by 30%.
推薦
Battery-Powered Wearable Health Patch
For disposable health patches, the ATSAML11E16A-AU delivers the lowest active power in its class at under 25 uA/MHz and under 100 nA sleep, extending single-cell coin-cell life past 30 days. TrustZone-M secures patient-identifiable health data at rest; on-die crypto prevents firmware extraction. The 10-bit DAC drives bio-impedance analog front-ends, the 12-bit ADC captures ECG/EMG, and PTC handles wet-skin capacitive touch. The 32-pin TQFP at 7x7 mm fits a 25 mm diameter circular PCB layout.
推薦
Smart Meter Endpoint
The ATSAML11E16A-AU targets smart-meter endpoints where secure firmware updates and tamper resistance are mandatory. TrustZone-M isolates meter-calibration constants from application code, satisfying revenue-grade integrity requirements. The 32 MHz Cortex-M23 with single-cycle multiplier handles DLMS/COSEM protocol stack in real time. Six SERCOMs support M-Bus, wireless M-Bus radio modules, optical UART, and metrology ADC interfaces concurrently. The 1.62V-3.63V supply accepts direct 3.6V Li-SOCl2 primary cells without LDO losses.
推薦
Capacitive Touch HMI
The ATSAML11E16A-AU's on-chip PTC (Peripheral Touch Controller) supports up to 32 capacitive touch channels without external touch ICs. The Cortex-M23 core runs gesture recognition and debounce algorithms while TrustZone-M protects signed UI firmware. The 10-bit DAC can drive LED backlight brightness via PWM or analog control. The TQFP-32 package exposes enough GPIO for 12-16 touch buttons plus an I2C-driven display. Compared to discrete touch controllers, the integrated solution eliminates the touch-IC BOM line.
推薦
Building Automation Sensor
In commercial building automation, the ATSAML11E16A-AU operates from -40C to +85C, fitting rooftop and mechanical-room deployments. TrustZone-M isolates BACnet/Modbus credentials from sensor firmware, preventing credential theft via debug access. Six SERCOMs handle RS-485, KNX, Zigbee/Matter modules, and HVAC actuator drivers. Sub-100 nA sleep current allows battery-assisted HVAC damper control with 10-year service intervals. The 64 KB Flash accommodates Matter commissioning code plus application logic.
推薦
Industrial Wireless Sensor Transmitter
For 4-20 mA loop replacement wireless transmitters, the ATSAML11E16A-AU offers the integration needed for an entire sensor node in one IC: ADC for sensor digitization, DAC for loop emulation or actuator drive, SERCOM for radio module interfacing, and crypto for authenticated sensor data. The 32 MHz Cortex-M23 runs calibration math in real time. AES hardware encryption secures sensor readings against eavesdropping on the wireless link. The 1.62V minimum supply supports Energy Harvesting PMIC outputs down to 1.8V.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAML11E16A-AU — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATSAML11E16A-AUT | ATSAML11E15A-AU | ATSAML10E16A-AU | ATSAML11E14A-AU |
|---|---|---|---|---|---|
| Package | 32-pin TQFP (7x7 mm) | 32-pin TQFP (7x7 mm) - same | 32-pin TQFP (7x7 mm) - same | 32-pin TQFP (7x7 mm) - same | 32-pin TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | Cortex-M23 + TrustZone-M | Cortex-M23 + TrustZone-M | Cortex-M23 + TrustZone-M | Cortex-M23 (no TrustZone-M) | Cortex-M23 + TrustZone-M |
| Flash Memory | 64 KB | 64 KB | 32 KB | 64 KB | 16 KB |
| SRAM | 16 KB | 16 KB | 8 KB | 16 KB | 4 KB |
| On-die Crypto | AES/SHA/TRNG | AES/SHA/TRNG | AES/SHA/TRNG | None | AES/SHA/TRNG |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Sleep Current | < 100 nA | < 100 nA | < 100 nA | < 100 nA | < 100 nA |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
主要差異化特點
- Industry's first Cortex-M23 with on-die TrustZone-M (對比ATSAML10E16A-AU)
- Half the sleep current of competing Cortex-M0+ MCUs (對比SAMD20 Cortex-M0+ family)
- Same-package drop-in migration to higher or lower memory tiers (對比ATSAML11E15A-AU / ATSAML11E14A-AU)
設計說明
The ATSAML11E16A-AU has three independently gated power domains (PD0, PD1, PD2) plus a backup domain with RTC retention. To achieve the <100 nA sleep current, switch all peripherals into PD2 and disable the Cortex-M23 core via Wait-for-Event (WFE) or Sleep-Now mode. The backup domain with RTC running draws approximately 700 nA, so even RTC-only retention should not be assumed to hit 100 nA unless the backup domain is also gated.
TrustZone-M secure/non-secure partitioning must be configured during the initial flash programming pass before user code executes. Designers using MPLAB Harmony v3 must enable the TrustZone-M linker in project properties, or the boot ROM will fail to enter secure mode. If a non-secure image is loaded without secure firmware present, the device will hard-fault on every boot. Reference the SAM L11 TrustZone-M Getting Started Guide (DS00003222A) before first programming.
Place a 1 uF X7R 0402 ceramic decoupling capacitor within 3 mm of the VDD pin, and a 100 nF X7R 0402 within 2 mm of the VDDIO pin. Add a 4.7 uF bulk capacitor near the MCU to support SERCOM TX burst currents. The 32 kHz crystal load capacitors should be sized per crystal CL specification and placed symmetrically to XIN/XOUT pins to minimize duty-cycle distortion. Keep the SWD trace length under 50 mm with 50 ohm impedance for reliable debug programming.
SERCOM lines configured for I2C require 4.7 kohm to 10 kohm pull-ups even when used as GPIO inputs, because the SAM L11 lacks internal pull-ups on every pin function. SERCOM pads configured for SPI master at >10 MHz need a 33 ohm series resistor at the driver pin to dampen reflections on long board traces. ADC inputs should be guarded with a ground ring on the PCB top layer to reduce digital switching noise pickup from adjacent SERCOM traces.
合規資訊
RoHS compliant per Microchip product page. Standard grade (-40C to +85C) - not AEC-Q100 automotive qualified; for automotive applications use ATSAML11E16A-AUT extended temperature or consult Microchip automotive part list.
