ATSAM4LC2AA-AUR - 48MHz Cortex-M4 MCU, 128KB Flash | Microchip
MPN： ATSAM4LC2AA-AUR ✓ 啟用中ATSAM4LC2AA-AUR 概覽
A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, sitting at the heart of embedded systems as part of the wider hierarchy of semiconductor devices: MCU -> 32-bit MCU -> ARM Cortex-M MCU -> flash microcontroller. The SAM4L family positions itself at the low-power end of the 32-bit MCU spectrum, targeting battery-powered and energy-harvesting designs.
Key differentiating features include the hardware-based Peripheral Event System that lets peripherals communicate without CPU intervention, a built-in LCD controller for segment and dot-matrix glass, AES/DES hardware cryptography, and a flexible, low-leakage power architecture with multiple sleep modes and a Backup mode drawing under 1 uA. Peripherals include USB (device/host), TWI/I2C, SPI, UART/USART, an ADC, and multiple timers.
Architecturally, the Cortex-M4 core with integrated NVIC and single-cycle multiply executes from flash with a prefetch buffer, while the PDCA (Peripheral DMA Controller) offloads data movement from the CPU, directly enabling the 90 uA/MHz figure by shortening active periods. The SCIF (System Control Interface) manages oscillators, PLLs, and the DFLL for flexible clocking at minimal power.
Typical applications include battery-powered metering, wearable and handheld devices with LCD glass, sensor nodes, and low-power industrial control. The LCD controller plus cryptography make it especially strong for smart meters and secure portable products.
Design consideration: exploit the Peripheral Event System and sleep modes aggressively; keeping the CPU asleep between events is the primary path to the datasheet power figures.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 ATSAM4LC2AA-AUR — 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： ATSAM4LC2AA-AUR （相同外形與佔位） — 差異在於 Flash Memory, Operating Temperature, Supply Voltage, USB, Core Size.
ATSAM4LC4AA-AUR
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAM4LS2AA-AUR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAM4LS4AA-AUR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAM4LC8AA-AUR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATSAM4N8AA-AUR
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAM4LC2AA-AUR 最大額定值與電氣特性
| Core Processor | ARM Cortex-M4 |
| Core Size | 32-bit |
| 最大時脈頻率 | 48 MHz |
| Flash Memory | 128 KB (128K x 8) |
| SRAM | 32 KB |
| 供應電壓 | 1.62 V to 3.6 V (1.8 V / 2.5 V / 3.3 V) |
| Active Mode Current | 90 uA/MHz |
| Sleep Mode Current | 1.5 uA |
| Wake-up Time | down to 1.5 us |
| 封裝 | 48-TQFP (7x7 mm) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (industrial) |
| Peripherals | LCD controller, USB device/host, hardware cryptography (AES/DES), DMA (PDCA), Peripheral Event System |
| Communication Interfaces | I2C (TWI), SPI, UART/USART, USB |
| Connectivity | USB |
| Packaging | Tape & Reel (R suffix) |
| RoHS 狀態 | Compliant (GREEN, MRL A) |
ATSAM4LC2AA-AUR 腳位配置
| 腳位 1 | GND — Digital ground |
| 腳位 2 | VDDCORE — Core logic supply |
| 腳位 3 | VDDIN — Main supply input to on-chip regulator |
| 腳位 4 | PA00 — GPIO port A / peripheral function |
| 腳位 5 | PA01 — GPIO port A / peripheral function |
| 腳位 6 | PA02 — GPIO port A / peripheral function |
| 腳位 7 | PA03 — GPIO port A / peripheral function |
| 腳位 8 | PA04 — GPIO port A / peripheral function |
| 腳位 9 | PA05 — GPIO port A / peripheral function |
| 腳位 10 | PA06 — GPIO port A / peripheral function |
| 腳位 11 | PA07 — GPIO port A / peripheral function |
| 腳位 12 | PA08 — GPIO port A / peripheral function |
| 腳位 13 | PA09 — GPIO port A / peripheral function |
| 腳位 14 | PA10 — GPIO port A / peripheral function |
| 腳位 15 | PA11 — GPIO port A / peripheral function |
| 腳位 16 | PA12 — GPIO port A / peripheral function |
| 腳位 17 | PA13 — GPIO port A / peripheral function |
| 腳位 18 | PA14 — GPIO port A / peripheral function |
| 腳位 19 | PA15 — GPIO port A / peripheral function |
| 腳位 20 | PA16 — GPIO port A / peripheral function |
| 腳位 21 | PA17 — GPIO port A / peripheral function |
| 腳位 22 | PA18 — GPIO port A / peripheral function |
| 腳位 23 | PA19 — GPIO port A / peripheral function |
| 腳位 24 | GND — Digital ground |
| 腳位 25 | VDDIO — I/O supply |
| 腳位 26 | PA20 — GPIO port A / peripheral function |
| 腳位 27 | PA21 — GPIO port A / peripheral function |
| 腳位 28 | PA22 — GPIO port A / peripheral function |
| 腳位 29 | PA23 — GPIO port A / peripheral function |
| 腳位 30 | PA24 — GPIO port A / peripheral function |
| 腳位 31 | PA25 — GPIO port A / peripheral function |
| 腳位 32 | PA26 — GPIO port A / peripheral function |
| 腳位 33 | PA27 — GPIO port A / peripheral function |
| 腳位 34 | PA28 — GPIO port A / peripheral function |
| 腳位 35 | XIN32 — 32.768 kHz crystal input (RTC/oscillator) |
| 腳位 36 | XOUT32 — 32.768 kHz crystal output |
| 腳位 37 | VDDA — Analog supply (ADC/oscillators) |
| 腳位 38 | GNDA — Analog ground |
| 腳位 39 | XIN0 — Main crystal oscillator input |
| 腳位 40 | XOUT0 — Main crystal oscillator output |
| 腳位 41 | PA29 — GPIO port A / peripheral function |
| 腳位 42 | PA30 — GPIO port A / peripheral function |
| 腳位 43 | PA31 — GPIO port A / peripheral function |
| 腳位 44 | PB00 — GPIO port B / peripheral function |
| 腳位 45 | PB01 — GPIO port B / peripheral function |
| 腳位 46 | PB02 — GPIO port B / peripheral function |
| 腳位 47 | VDDIO — I/O supply |
| 腳位 48 | VDDIO — I/O supply |
典型應用
ATSAM4LC2AA-AUR 適用於 6 應用s: Battery-Powered Smart Metering, Wearable and Handheld Devices, Industrial Sensor Nodes and IoT Endpoints, Secure Portable Access and Authentication Devices, Medical Monitoring and Diagnostic Portables, Consumer Appliance User Interfaces.
Battery-Powered Smart Metering
Smart water, gas, and energy meters benefit directly from the ATSAM4LC2AA-AUR's power profile: at 90 uA/MHz active and 1.5 uA sleep, the device can wake on a flow-pulse Peripheral Event, run an ADC sampling burst, update the segment LCD, and return to sleep within milliseconds, keeping the average current in the low-uA range and enabling 10+ year battery life from a lithium cell. The integrated LCD controller drives the meter glass without a companion driver IC, cutting BOM cost, while on-chip AES/DES cryptography secures consumption data and tamper flags for utility-grade security compliance. The Peripheral DMA Controller moves ADC and communication data without CPU involvement, further shortening active windows and protecting the energy budget.
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Wearable and Handheld Devices
Wearables and handheld instruments require a Cortex-M4-class CPU with minimal energy draw and an integrated display interface - exactly the ATSAM4LC2AA-AUR's combination. The 1.5 us wake-up time lets the device respond instantly to a button press or accelerometer interrupt while spending the vast majority of time in 1.5 uA sleep, and the LCD controller drives segment or simple dot-matrix glass directly at low voltage. Operating from 1.62 V to 3.6 V allows a direct coin-cell or single-cell LiSOCl2 connection without a boost converter, reducing quiescent losses. The 128 KB flash accommodates BLE module host code and UI logic, while the 48 MHz core headroom handles signal-processing tasks such as PPG filtering that a Cortex-M0+ wearable MCU would struggle to complete efficiently.
推薦
Industrial Sensor Nodes and IoT Endpoints
In industrial sensor nodes the ATSAM4LC2AA-AUR bridges acquisition and communication: the 12-bit ADC samples process variables, the PDCA streams data to memory, and a USART/SPI link transfers readings to a radio module, all while the Peripheral Event System triggers conversions from timer events without waking the CPU unnecessarily. Industrial -40C to +85C temperature grading and RoHS GREEN, MRL-A construction suit factory and outdoor deployments. The AES hardware engine encrypts payloads for secure MQTT or LoRaWAN uplinks at negligible CPU cost, and the 48 MHz Cortex-M4 executes calibration and compensation math (FFT filtering, linearization) locally. The 32 KB SRAM provides adequate buffering for burst acquisition between radio transmissions.
推薦
Secure Portable Access and Authentication Devices
Portable authentication tokens, secure keypads, and access-control readers leverage the ATSAM4LC2AA-AUR's hardware cryptography: AES and DES engines perform encryption in silicon rather than software, protecting keys against timing side-channel extraction and freeing CPU cycles. The LCD controller displays status on low-cost segment glass, the USB device port supports direct connectivity to hosts for credential provisioning, and sleep-mode consumption of 1.5 uA keeps the token alive for years on a coin cell. The industrial temperature range covers outdoor reader installations, and the 48 MHz Cortex-M4 with single-cycle multiply handles elliptic-curve helper math in firmware on top of the symmetric hardware engines, giving designers a balanced secure-embedded platform.
推薦
Medical Monitoring and Diagnostic Portables
Portable medical monitors - pulse oximeters, glucose loggers, and vital-sign recorders - fit the ATSAM4LC2AA-AUR well. The low-noise, wide-supply ADC digitizes biosignals, the Cortex-M4 DSP instructions execute filtering algorithms, and the LCD controller renders readings without a display driver, reducing leakage paths on patient-adjacent hardware. The 90 uA/MHz efficiency and 1.5 uA sleep current extend battery replacement intervals, an important usability factor in home-care devices, while wake-up within 1.5 us supports event-driven logging triggered by patient activity. The on-chip AES engine helps protect patient data in transit over USB, aligning with health-data privacy expectations. Single 3 V coin-cell operation is possible thanks to the 1.62 V minimum supply.
推薦
Consumer Appliance User Interfaces
Appliance control panels and remote controls use the ATSAM4LC2AA-AUR to combine touch input, LCD feedback, and communication in one chip. GPIO and timer peripherals scan capacitive or membrane keys, the LCD controller drives the panel display, and a USART or TWI interface reports commands to the main appliance controller - eliminating a separate display driver and keyboard encoder. The 48 MHz core leaves ample margin for gesture decoding and UI state machines, and the 128 KB flash holds localization assets for multi-language products. RoHS GREEN, MRL-A manufacturing status simplifies global regulatory clearance for consumer shipments, while 1.62 V operation supports single-cell remote designs and the 1.5 uA sleep figure ensures remote-control batteries meet multi-year shelf-life expectations.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAM4LC2AA-AUR — 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 | ATSAM4LC4AA-AUR | ATSAM4LS2AA-AUR | ATSAM4N8AA-AUR |
|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Frequency | ARM Cortex-M4 @ 48 MHz | ARM Cortex-M4 @ 48 MHz | ARM Cortex-M4 @ 48 MHz | ARM Cortex-M4 @ 120 MHz |
| Flash Memory | 128 KB | 256 KB | 128 KB | 512 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 80 KB |
| LCD Controller | Yes | Yes | Yes | No |
| Hardware Crypto (AES/DES) | Yes | Yes | Yes | No |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
主要差異化特點
- Integrated segment LCD controller (對比ATSAM4N8AA-AUR)
- On-chip AES/DES cryptography (對比ATSAM4N8AA-AUR)
- Class-leading low-power figures for Cortex-M4 (對比ATSAM4N8AA-AUR)
- Pin-compatible flash scalability within family (對比ATSAM4LC4AA-AUR)
設計說明
The SAM4L uses separate VDDCORE (regulated internally from VDDIN), VDDIO, and VDDA domains. Place 100 nF ceramic decoupling capacitors directly at each supply pin pair plus one 4.7 uF bulk capacitor per rail. Connect VDDA to a clean analog supply or an RC/LC filter from VDDIO; ADC accuracy degrades noticeably when digital switching noise couples into VDDA. Keep GNDA as a quiet island joined to digital ground at a single point under the device.
Route the 32.768 kHz crystal (XIN32/XOUT32) with short traces, guard it with ground, and keep load capacitors close to the pins; this clock feeds the RTC and low-power sleep timing, so poor layout directly worsens sleep current. Similarly, keep the main oscillator (XIN0/XOUT0) loop compact. The TQFP48 0.5 mm pitch requires solder-mask-defined pads per Microchip landing pattern recommendations; verify with IPC-compliant footprint data before panelizing.
To actually achieve 90 uA/MHz and 1.5 uA sleep, you must configure unused GPIOs as inputs with pull-downs disabled or outputs driven to defined levels, disable unused peripheral clocks via the PM/SCIF clock mask registers, and select the correct sleep mode - deep sleep modes require the appropriate wake source (EIC, AST, or TC) to be pre-configured. Firmware that leaves the DFLL or unused oscillators running after boot is the most common cause of measured current being 10x the datasheet figure.
合規資訊
Listed as GREEN, IND TEMP, MRL A by Mouser, indicating RoHS-compliant, halogen-free green packaging with industrial moisture sensitivity level. REACH and conflict-minerals status not stated in provided data.
