ATSAML11E14A-AFT - Cortex-M23 MCU 32MHz 16KB TQFP-32 | Microchip
料号： ATSAML11E14A-AFT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.46 | $1,230.00 |
| 1,000 | $2.19 | $2,190.00 |
ATSAML11E14A-AFT 概述
What is an ARM Cortex-M23 microcontroller? The Cortex-M23 is an ARMv8-M baseline core designed for ultra-low-power, security-aware embedded applications, sitting below the Cortex-M33 in ARM's hierarchy and above legacy Cortex-M0/M0+ parts. SAM L11 MCUs belong to the broader 32-bit microcontroller category, which itself is a subcategory of embedded microcontrollers within integrated circuits. The Cortex-M23 architectural choice delivers Thumb-2 instruction set support, deterministic interrupt handling, and optional TrustZone for Cortex-M, allowing firmware to partition secure and non-secure execution domains at the hardware level.
Key features of this part include less than 25 uA/MHz active current consumption, sub-100 nA sleep current, ARM TrustZone-M technology, secure boot with root-of-trust in Flash, hardware AES/SHA accelerator, secure key storage, chip-level tamper detection, and an operating temperature range up to +125C. Communication peripherals include SERCOM, I2C, SPI, and UART interfaces alongside ADC, DAC, timers, and PTC touch-supporting peripherals.
Typical applications span IoT end nodes requiring secure firmware update, smart sensors with attestation, secure authentication tokens, medical wearables needing HIPAA-friendly data protection, building automation controllers, and battery-powered wireless sensor nodes where <100 nA sleep current directly extends operational lifetime on coin-cell batteries.
Design consideration: TrustZone partitioning requires linker-script awareness - Secure code, Non-Secure Callable (NSC) veneers, and Non-Secure application code must be placed in distinct memory regions per the SAM L11 reference design. Misplaced code will trigger secure fault exceptions.
This page synthesizes distributor pricing, drop-in alternatives drawn from the SAM L10/L11 family, and practical TrustZone design notes not consolidated in the manufacturer datasheet.
直接替换替代料： ATSAML11E14A-AFT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATSAML11E14A-AFT （相同外形与封装尺寸） ——差异在于 Operating Temperature, Program Memory (Flash), Package, Core Architecture, Mounting Type.
快速对比工具——选择替代料号进行并排对比：
ATSAML11E15A-AFT
✅ 直接替换✓ 有现货
$1.95 / 个
查看数据手册 →ATSAML11E16A-AUT
✅ 直接替换📋 参考替代料（不在目录中）
ATSAML11D14A-MUT
✅ 直接替换✓ 有现货
$1.62 / 个
查看数据手册 →ATSAML11E14A-AF
✅ 直接替换✓ 有现货
$2.45 / 个
查看数据手册 →ATSAML10E16A-AFT
✅ 直接替换✓ 有现货
$2.18 / 个
查看数据手册 →ATSAML11E14A-AFT 最大额定值与电气特性
| Core Architecture | ARM Cortex-M23 (ARMv8-M) |
| TrustZone Support | Yes (ARM TrustZone for Cortex-M) |
| Maximum Clock Speed | 32 MHz |
| Program Memory (Flash) | 16 KB |
| SRAM | 8 KB |
| 封装 | 32-TQFP (7x7 mm) |
| Active Current | <25 uA/MHz |
| Sleep Current | <100 nA |
| 工作温度 | -40C to +125C (industrial) |
| Crypto Accelerator | AES, SHA, secure key storage, tamper detection |
| Communication Interfaces | SERCOM (UART/SPI/I2C configurable) |
| 安装类型 | Surface Mount (Tape & Reel) |
| RoHS 状态 | Compliant |
| Series | SAM L11 |
ATSAML11E14A-AFT 引脚配置
| 引脚 1 | PA00 — General-purpose I/O / SERCOM0 pad 0 |
| 引脚 2 | PA01 — General-purpose I/O / SERCOM0 pad 1 |
| 引脚 3 | PA02 — General-purpose I/O / SERCOM0 pad 2 |
| 引脚 4 | PA03 — General-purpose I/O / SERCOM0 pad 3 / ADC AIN[1] |
| 引脚 5 | PA04 — General-purpose I/O / SERCOM1 pad 0 / ADC VREF |
| 引脚 6 | PA05 — General-purpose I/O / SERCOM1 pad 1 |
| 引脚 7 | PA06 — General-purpose I/O / SERCOM1 pad 2 |
| 引脚 8 | PA07 — General-purpose I/O / SERCOM1 pad 3 / ADC AIN[7] |
| 引脚 9 | VDD — Digital supply voltage |
| 引脚 10 | GND — Ground |
| 引脚 11 | PA08 — General-purpose I/O / SERCOM2 pad 0 |
| 引脚 12 | PA09 — General-purpose I/O / SERCOM2 pad 1 |
| 引脚 13 | PA10 — General-purpose I/O / SERCOM2 pad 2 |
| 引脚 14 | PA11 — General-purpose I/O / SERCOM2 pad 3 |
| 引脚 15 | PA14 — General-purpose I/O / SERCOM3 pad 2 / XIN |
| 引脚 16 | PA15 — General-purpose I/O / SERCOM3 pad 3 / XOUT |
| 引脚 17 | PA16 — General-purpose I/O / SERCOM1 pad 0 / I2S SCK |
| 引脚 18 | PA17 — General-purpose I/O / SERCOM1 pad 1 / I2S FS |
| 引脚 19 | PA18 — General-purpose I/O / SERCOM3 pad 0 / TCC0 WO[0] |
| 引脚 20 | PA19 — General-purpose I/O / SERCOM3 pad 1 / TCC0 WO[1] |
| 引脚 21 | PA20 — General-purpose I/O / SERCOM5 pad 2 |
| 引脚 22 | PA21 — General-purpose I/O / SERCOM5 pad 3 |
| 引脚 23 | PA22 — General-purpose I/O / SERCOM3 pad 0 / I2S SDO |
| 引脚 24 | PA23 — General-purpose I/O / SERCOM3 pad 1 / USB DP |
| 引脚 25 | PA24 — General-purpose I/O / SERCOM5 pad 2 / USB DM |
| 引脚 26 | PA25 — General-purpose I/O / SERCOM5 pad 3 |
| 引脚 27 | RESET — Reset input (active-low) |
| 引脚 28 | SWDIO — Serial Wire Debug I/O |
| 引脚 29 | SWCLK — Serial Wire Debug clock |
| 引脚 30 | VDD — Digital supply voltage |
| 引脚 31 | GND — Ground |
| 引脚 32 | PA27 — General-purpose I/O / SERCOM0 pad 3 |
典型应用
ATSAML11E14A-AFT 适用于 6 应用s: Secure IoT Sensor End Nodes, Smart Authentication Tokens and Secure Accessories, Battery-Powered Medical Wearables, Industrial Building Automation Controllers, Smart Metering and Energy Sub-Metering, Secure Peripherals for POS and Access Control.
Secure IoT Sensor End Nodes
The ATSAML11E14A-AFT is a strong fit for secure battery-powered IoT sensor end nodes because its <100 nA sleep current extends coin-cell lifetime to multi-year ranges, while its TrustZone-M hardware isolation partitions sensor drivers from cryptographic firmware. The hardware AES/SHA accelerator offloads message authentication, allowing the Cortex-M23 to wake briefly, authenticate the sensor reading, and return to sleep in microseconds - critical for duty-cycled deployments. Paired with a sub-GHz or BLE radio, the MCU acts as the secure element of the node, with secure-boot ROM verifying signed firmware at every power-on reset and tamper pins triggering secure erase of keys if enclosure intrusion is detected.
推荐
Smart Authentication Tokens and Secure Accessories
The ATSAML11E14A-AFT suits hardware authentication tokens, secure dongles, and tamper-evident accessories because its TrustZone-M hardware enforces secure / non-secure code separation at boot, with secure key storage backed by the on-chip crypto subsystem. The Cortex-M23 core computes ECDSA or Ed25519 signatures in milliseconds using the hardware accelerator, while tamper pins (DETECT, RTC, or GPIO-mapped) can trigger secure key zeroization within one clock cycle. The 16 KB Flash is sufficient to host a TLS handshake client, a small vendor-specific protocol stack, and a vendor certificate store - the typical footprint for FIDO2-style authenticators or industrial asset-tracking tags.
推荐
Battery-Powered Medical Wearables
The ATSAML11E14A-AFT is appropriate for medical wearables such as continuous glucose monitors, smart patches, and remote patient telemetry where <100 nA sleep current and TrustZone-M-protected patient data are regulatory requirements. The Cortex-M23 core at 32 MHz runs sensor-fusion DSP loops while burning <25 uA/MHz, so even at full active duty the part draws under 1 mA - well within the budget of a coin-cell or printed battery. TrustZone partitions protect patient-identifiable health data from firmware running in the Non-Secure world, supporting HIPAA-style data-handling models at the chip level rather than relying solely on software safeguards. Hardware tamper detection further supports FDA premarket cybersecurity guidance by detecting and erasing keys on enclosure breach.
推荐
Industrial Building Automation Controllers
The ATSAML11E14A-AFT fits distributed building-automation controllers - smart thermostats, BACnet/Modbus bridge nodes, and security panels - because its -40C to +125C industrial temperature range and TrustZone-secured firmware update path meet the long-life, hostile-environment requirements of commercial HVAC and access-control installations. Multiple SERCOM peripherals can be software-configured as UART for Modbus RTU, SPI for sensor expansion, or I2C for local EEPROM and RTC, allowing a single MCU to act as both the communications hub and the secure element of the node. The hardware AES engine encrypts command traffic between the controller and the central building-management system without burdening the Cortex-M23 core.
推荐
Smart Metering and Energy Sub-Metering
The ATSAML11E14A-AFT is appropriate for electricity, gas, and water sub-metering endpoints where signed measurement records, tamper resistance, and multi-year battery life are mandatory. TrustZone-M enforces separation between the metrology code (Secure world) and the communications stack (Non-Secure world), preventing a network-borne compromise from forging billing data. The hardware AES/SHA accelerator signs each measurement record before transmission, and the <100 nA sleep current is essential for gas and water meters that spend 99.9% of their lifetime asleep between infrequent wake-ups to transmit readings. The 32 MHz Cortex-M23 executes signed metrology calculations in single-digit milliseconds per sample.
推荐
Secure Peripherals for POS and Access Control
The ATSAML11E14A-AFT is well suited to secure PIN pads, payment terminals, and physical access readers because its TrustZone-M and hardware AES/SHA subsystems satisfy PCI PTS and similar payment-security requirements for firmware integrity and cryptographic key isolation. The Cortex-M23 core manages the keypad matrix, RFID/NFC front-end, and secure display I/O while the crypto subsystem handles EMVCo transaction signing in the Secure world. The 16 KB Flash comfortably hosts a payment kernel, while the 8 KB SRAM is sufficient for transaction buffering. Industrial -40C to +125C rating allows deployment in outdoor kiosks, fuel pumps, and unattended terminals.
推荐
推荐产品汇总
工程参考数据： ATSAML11E14A-AFT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATSAML11E15A-AFT | ATSAML11E16A-AUT | ATSAML11D14A-MUT | ATSAML11E14A-AF | ATSAML10E16A-AFT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same |
| Core | Cortex-M23 | Cortex-M23 | Cortex-M23 | Cortex-M23 | Cortex-M23 | Cortex-M23 |
| Clock Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash | 16 KB | 32 KB | 64 KB | 16 KB | 16 KB | 64 KB |
| SRAM | 8 KB | 8 KB | 16 KB | 8 KB | 8 KB | 8 KB |
| TrustZone-M | Yes | Yes | Yes | Yes | Yes | No |
| Hardware Crypto | AES / SHA / Secure Key | AES / SHA / Secure Key | AES / SHA / Secure Key | AES / SHA / Secure Key | AES / SHA / Secure Key | Not present |
| Active Current | <25 uA/MHz | <25 uA/MHz | <25 uA/MHz | <25 uA/MHz | <25 uA/MHz | <25 uA/MHz |
关键差异点
- Lowest-power Cortex-M23 with TrustZone-M in this price tier （对比 ATSAML10E16A-AFT)
- 16 KB Flash tier minimizes BOM cost （对比 ATSAML11E16A-AUT)
- Industrial 125C rating with tape-and-reel （对比 ATSAML11E14A-AF)
设计说明
TrustZone-M projects require three distinct linker regions - Secure (.text_s), Non-Secure Callable (.text_nsc), and Non-Secure (.text_ns) - and missing NSC entry points cause secure-fault exceptions at first NS call. Use Microchip's SAM L11 TrustZone linker-template projects in MPLAB Harmony as the starting point; do not hand-write the linker script unless you have validated the SAU (Security Attribution Unit) configuration against the reference design.
Sleep current below 100 nA assumes the brown-out detector (BOD) is configured in continuous mode disabled and that all SERCOM peripherals are disabled before WFI. Estimate: enabling a single SERCOM in standby adds ~3-5 uA, so for true <100 nA sleep disable every peripheral in the sleep preparation routine. Reference the 'Power Manager' chapter of the SAM L11 family datasheet for the exact register sequence.
Place the 100 nF decoupling capacitor within 2 mm of each VDD pin and a single 1 uF bulk capacitor within 5 mm; add a 10 uF bulk at the regulator output. Route SWDIO/SWCLK as a short, length-matched pair (<50 mm) with a 100 ohm series terminator if the trace exceeds 30 mm, to prevent debugger attach failures on production boards.
Keep the 32.768 kHz crystal traces short and symmetric, and surround them with a ground pour stitched with vias on a 5 mm pitch to minimize stray capacitance. The internal load-capacitance configuration registers (XIN32 / XOUT32) must be set per the crystal CL spec; mismatched load capacitance shifts the RTC accuracy by tens of ppm and degrades TrustZone secure-time-stamp reliability.
合规信息
RoHS and REACH compliance confirmed via Microchip product page. Not AEC-Q100 qualified - SAM L11 family targets industrial / consumer, not automotive. Halogen-free status not explicitly listed in verified data and marked unknown.
