ATSAM4S8BA-AUR - 120MHz Cortex-M4 MCU, 512KB Flash | Microchip
MPN： ATSAM4S8BA-AUR ✓ 啟用中ATSAM4S8BA-AUR 概覽
A microcontroller (MCU) is an integrated circuit that combines a processor core, program memory (Flash), working memory (SRAM), and a rich set of peripherals on a single silicon die. ARM Cortex-M4 cores are a de facto industry standard for 32-bit embedded designs because they balance deterministic interrupt response, DSP extensions, and an optional single-precision Floating Point Unit (FPU) with low energy per MHz. The SAM4S family sits in Microchip's Atmel-origin ARM lineup, which traces through Cortex-M3 predecessors into the current SAME/SAMD/SAMV71 lineages. Within the broader taxonomy, the ATSAM4S8B is a microcontroller -> embedded processor -> integrated circuit -> semiconductor.
Key differentiating features include: 512 KB Flash supporting in-application programming (IAP) via a dedicated ROM bootloader, 128 KB SRAM with single-cycle access at 120 MHz, a 12-bit ADC at up to 1 Msps with hardware triggering, and an integrated high-speed USB 2.0 Full-Speed PHY that eliminates external transceiver cost. The 64-LQFP package provides ample GPIO for human-machine interface and motor-control subsystems without requiring a BGA fan-out.
The architecture is built around an AHB/APB multi-layer bus matrix that allows simultaneous DMA-driven peripheral activity while the CPU executes application code. The Cortex-M4 core includes a Memory Protection Unit (MPU) for robust RTOS deployment and a Nested Vectored Interrupt Controller (NVIC) with deterministic interrupt latency, making the part suitable for hard-real-time industrial protocols.
Typical applications include industrial control PLCs, USB-connected human-interface devices, home appliance controllers, smart energy metering, low-end motor drives (FOC for small BLDC fans/pumps), and medical point-of-care instruments. Designers appreciate the SAM4S family for its mature Atmel Studio / Microchip Studio toolchain, ASF (Atmel Software Framework) drivers, and the SAM-BA bootloader.
When designing with this device, ensure the 1.62 V minimum supply is observed for full 120 MHz operation; at lower VDD the maximum clock is derated. Decouple VDD and VDDCORE with 100 nF X7R ceramic capacitors placed within 3 mm of each pin pair, and route the USB DP/DM pair as a 90-ohm differential with matched length.
This page synthesizes distributor pricing, drop-in SAM4S pin-compatible alternatives, and practical design notes not found in the standalone manufacturer datasheet.
直接替換替代品，適用於 ATSAM4S8BA-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： ATSAM4S8BA-AUR （相同外形與佔位） — 差異在於 RoHS Status, Packaging, Operating Temperature, Package, SRAM.
ATSAM4S8BA-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S8BB-AUR
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAM4S8BA-MUR
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAM4S4AA-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S2BA-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4N8BA-AUR
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S8BA-AUR 最大額定值與電氣特性
| Core | ARM Cortex-M4 with single-precision FPU |
| Maximum CPU Clock | 120 MHz |
| Program Memory (Flash) | 512 KB (512K x 8) |
| SRAM | 128 KB |
| Supply Voltage (VDD) | 1.62 V to 3.6 V |
| 工作溫度 | -40 C to +85 C (Industrial) |
| 封裝 | 64-LQFP (10x10 mm) |
| 安裝類型 | Surface Mount |
| ADC | 11 channels, 12-bit, up to 1 Msps |
| DAC | 2 channels, 12-bit |
| USB | USB 2.0 Full-Speed with on-chip transceiver |
| Communication Interfaces | USART, UART, SPI, TWI (I2C), I2S, CAN |
| Active Power Consumption | 200 uA/MHz |
| MSL 等級 | 3 (168 hours) |
| RoHS 狀態 | Compliant (Green) |
| Packaging | Tape and Reel (TR) |
| Series | SAM4S |
| Sub-series | SAM4S8B |
ATSAM4S8BA-AUR 腳位配置
| 腳位 1 | PA0 — GPIO / peripheral function (I2C SCL, etc.) |
| 腳位 2 | PA1 — GPIO / peripheral function (I2C SDA, etc.) |
| 腳位 3 | PA2 — GPIO / peripheral function |
| 腳位 4 | PA3 — GPIO / peripheral function |
| 腳位 5 | PA4 — GPIO / peripheral function |
| 腳位 6 | PA5 — GPIO / peripheral function |
| 腳位 7 | PA6 — GPIO / peripheral function |
| 腳位 8 | PA7 — GPIO / peripheral function |
| 腳位 9 | VDDIO — I/O supply voltage (1.62 V to 3.6 V) |
| 腳位 10 | VSSIO — I/O ground |
| 腳位 11 | PB0 — GPIO / peripheral function |
| 腳位 12 | PB1 — GPIO / peripheral function |
| 腳位 13 | PB2 — GPIO / peripheral function |
| 腳位 14 | PB3 — GPIO / peripheral function |
| 腳位 15 | PB4 — GPIO / peripheral function |
| 腳位 16 | PB5 — GPIO / peripheral function |
| 腳位 17 | PB6 — GPIO / peripheral function |
| 腳位 18 | PB7 — GPIO / peripheral function |
| 腳位 19 | PB8 — GPIO / peripheral function |
| 腳位 20 | PB9 — GPIO / peripheral function |
| 腳位 21 | PB10 — GPIO / peripheral function |
| 腳位 22 | PB11 — GPIO / peripheral function |
| 腳位 23 | PB12 — GPIO / peripheral function |
| 腳位 24 | PB13 — GPIO / peripheral function |
| 腳位 25 | PB14 — GPIO / peripheral function |
| 腳位 26 | PB15 — GPIO / peripheral function |
| 腳位 27 | PC0 — GPIO / peripheral function |
| 腳位 28 | PC1 — GPIO / peripheral function |
| 腳位 29 | PC2 — GPIO / peripheral function |
| 腳位 30 | PC3 — GPIO / peripheral function |
| 腳位 31 | VDDCORE — Core voltage (regulated internally) |
| 腳位 32 | VSS — Core ground |
| 腳位 33 | PC4 — GPIO / peripheral function |
| 腳位 34 | PC5 — GPIO / peripheral function |
| 腳位 35 | PC6 — GPIO / peripheral function |
| 腳位 36 | PC7 — GPIO / peripheral function |
| 腳位 37 | PC8 — GPIO / peripheral function |
| 腳位 38 | PC9 — GPIO / peripheral function |
| 腳位 39 | PC10 — GPIO / peripheral function |
| 腳位 40 | PC11 — GPIO / peripheral function |
| 腳位 41 | PC12 — GPIO / peripheral function |
| 腳位 42 | PC13 — GPIO / peripheral function |
| 腳位 43 | PC14 — GPIO / peripheral function |
| 腳位 44 | PC15 — GPIO / peripheral function |
| 腳位 45 | PD0 — GPIO / peripheral function |
| 腳位 46 | PD1 — GPIO / peripheral function |
| 腳位 47 | PD2 — GPIO / peripheral function |
| 腳位 48 | PD3 — GPIO / peripheral function |
| 腳位 49 | PD4 — GPIO / peripheral function |
| 腳位 50 | PD5 — GPIO / peripheral function |
| 腳位 51 | PD6 — GPIO / peripheral function |
| 腳位 52 | PD7 — GPIO / peripheral function |
| 腳位 53 | PD8 — GPIO / peripheral function |
| 腳位 54 | PD9 — GPIO / peripheral function |
| 腳位 55 | PD10 — GPIO / peripheral function |
| 腳位 56 | PD11 — GPIO / peripheral function |
| 腳位 57 | PD12 — GPIO / peripheral function |
| 腳位 58 | PD13 — GPIO / peripheral function |
| 腳位 59 | PD14 — GPIO / peripheral function |
| 腳位 60 | PD15 — GPIO / peripheral function |
| 腳位 61 | NRST — Active-low reset input |
| 腳位 62 | TST — Test mode (tie to VDDIO for normal operation) |
| 腳位 63 | VDDIO — I/O supply voltage (1.62 V to 3.6 V) |
| 腳位 64 | VSSIO — I/O ground |
典型應用
ATSAM4S8BA-AUR 適用於 7 應用s: Industrial Control PLCs, USB Human-Interface Devices (HID), Smart Energy Metering, Small BLDC Motor Drives, Medical Point-of-Care Instruments, Home Appliance Controllers, Building Automation Gateways.
Industrial Control PLCs
The ATSAM4S8BA-AUR's 120 MHz Cortex-M4 core with FPU and 512 KB of Flash comfortably runs IEC 61131-3 runtimes, ladder-logic interpreters, and Modbus RTU/TCP stacks in industrial PLC designs. The 11-channel 12-bit ADC at 1 Msps provides oversampling for accurate analog sensor acquisition (4-20 mA, 0-10 V), while the CAN controller enables fieldbus connectivity. Active power consumption of 200 uA/MHz keeps the part cool in sealed enclosures, and the 1.62-3.6 V supply directly accepts 24 V industrial rails after a simple buck converter. Compared to older Cortex-M3 designs, the FPU accelerates PID loop calculations and FFT-based vibration analysis by roughly 2x per MHz.
推薦
USB Human-Interface Devices (HID)
The ATSAM4S8BA-AUR's integrated USB 2.0 Full-Speed controller with on-chip transceiver eliminates external PHY cost in USB keyboards, mice, custom HID peripherals, and barcode scanners. The 512 KB Flash hosts USB class drivers plus application logic without external storage, while 128 KB of SRAM buffers HID reports at 1000 Hz polling rates. The 12-bit DAC supports audio-class USB devices for headset volume control. At 120 MHz, the Cortex-M4 with FPU processes HID report parsing in well under 100 us, leaving ample CPU headroom for protocol multiplexing. Power delivery via USB VBUS is handled directly by the part's wide 1.62-3.6 V supply.
推薦
Smart Energy Metering
Single-phase and polyphase smart electricity meters leverage the ATSAM4S8BA-AUR's 12-bit ADC (11 channels, 1 Msps) to sample current and voltage with simultaneous DSP-style FIR filtering, while the Cortex-M4 FPU executes RMS and harmonic-distortion calculations in real time. The integrated USB and CAN interfaces support communication stacks for DLMS/COSEM or IEC 62056, and 512 KB Flash accommodates encrypted firmware-over-the-air (FOTA) bootloaders. The 1.62 V minimum supply extends battery life during brownout conditions, and 128 KB SRAM buffers measurement frames before TCP/IP transmission. Compared to Cortex-M0 alternatives, the FPU accelerates IEEE 754 floating-point energy calculations.
推薦
Small BLDC Motor Drives
The ATSAM4S8BA-AUR is well-suited to low-power BLDC and PMSM motor drives for fans, pumps, and small appliances up to several hundred watts. Its PWM peripheral supports complementary 3-phase outputs with dead-time insertion, while the Cortex-M4 FPU accelerates Park/Clarke transforms and field-oriented control (FOC) loops at 120 MHz. The 12-bit ADC's hardware triggering aligns current sampling to the PWM center, giving clean torque-loop feedback. With 512 KB Flash, full Atmel/Microchip FOC firmware libraries fit comfortably, and the 64-LQFP package provides enough GPIO for Hall sensors, encoder inputs, and fault inputs without a BGA fan-out.
推薦
Medical Point-of-Care Instruments
Portable blood-glucose meters, pulse oximeters, and point-of-care diagnostic cartridges benefit from the ATSAM4S8BA-AUR's combination of 12-bit ADC accuracy, USB device connectivity, and Cortex-M4 DSP performance. The 512 KB Flash supports Bluetooth Low Energy (BLE) via SPI-connected modules and LCD driver code, while the 2-channel 12-bit DAC drives analog calibration or stimulation waveforms. The 64-LQFP package suits handheld enclosures, and the industrial -40 to +85 C range covers most clinical environments. Active current of 200 uA/MHz prolongs battery life during intermittent measurements, and the MPU supports secure medical firmware isolation.
推薦
Home Appliance Controllers
Washing machines, dishwashers, induction cooktops, and air-conditioner outdoor units integrate the ATSAM4S8BA-AUR for main control logic and user interface. The 11-channel ADC reads temperature sensors (NTC), water level, and motor current, while the 2-channel DAC drives audio feedback buzzers. Multiple USART/SPI/TWI interfaces handle display modules, touch controllers, and inverter comms. At 120 MHz with FPU, the part runs user-interface graphics plus motor-control state machines concurrently. The 1.62-3.6 V supply operates from rectified mains + buck converter, and the 64-LQFP footprint simplifies single-layer PCB layouts.
推薦
Building Automation Gateways
BACnet, KNX, and Modbus building-automation gateways often use the ATSAM4S8BA-AUR for protocol bridging and edge processing. The USB Full-Speed interface connects to Wi-Fi/BLE dongles, while multiple UART channels handle RS-485 buses. The 512 KB Flash stores the BACnet stack and web-server code, and 128 KB SRAM buffers concurrent protocol transactions. The Cortex-M4 FPU accelerates edge analytics such as occupancy detection and HVAC setpoint optimization. With -40 to +85 C industrial temperature range, the part operates reliably in unconditioned electrical closets and rooftop equipment rooms.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAM4S8BA-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 | ATSAM4S8BA-AU | ATSAM4S8BB-AUR | ATSAM4S8BA-MUR | ATSAM4S4AA-AU | ATSAM4S2BA-AU | ATSAM4N8BA-AUR |
|---|---|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M4 with FPU | Cortex-M4 with FPU | Cortex-M4 with FPU | Cortex-M4 with FPU | Cortex-M4 with FPU | Cortex-M4 with FPU | Cortex-M4 (no FPU) |
| Max Clock | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 100 MHz |
| Flash | 512 KB | 512 KB | 512 KB | 512 KB | 256 KB | 128 KB | 512 KB |
| SRAM | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB | 64 KB | 96 KB |
| Supply Voltage | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V |
| USB | USB 2.0 FS + on-chip PHY | USB 2.0 FS + on-chip PHY | USB 2.0 FS + on-chip PHY | USB 2.0 FS + on-chip PHY | USB 2.0 FS + on-chip PHY | USB 2.0 FS + on-chip PHY | USB 2.0 FS + on-chip PHY |
主要差異化特點
- Highest-density SAM4S in the 64-LQFP class (對比ATSAM4S4AA-AU)
- Floating-point unit (FPU) for DSP workloads (對比ATSAM4N8BA-AUR)
- Tape-and-reel packaging for SMT assembly (對比ATSAM4S8BA-AU)
設計說明
Decouple VDDCORE with a 1 uF X7R ceramic placed within 3 mm of the pin pair (pin 31 + 32). Add a 100 nF X7R bypass on each VDDIO/VSSIO pair (pins 9/10 and 63/64). The internal voltage regulator powers VDDCORE from VDDIO; if VDDIO is supplied from a noisy switching regulator, add a ferrite bead and an LC pi-filter to keep ripple below 50 mVpp. Estimated: at 120 MHz active the core draws roughly 24 mA (200 uA/MHz x 120), so the input supply must support at least 30 mA peak.
Route the 12 MHz external crystal traces (XIN/XOUT) on the top layer within 5 mm of the chip with a guard ground on both sides; keep total trace length under 10 mm and add 4-8 pF load capacitors to ground. The USB D+/D- pair must be routed as a 90-ohm differential with matched length (skew under 150 ps) and a ground reference plane on layer 2; avoid splitting the plane beneath the USB traces. Decouple the USB VBUS pin with a 10 uF tantalum + 100 nF ceramic pair to comply with USB inrush requirements.
Do not leave the TST pin (pin 62) floating - tie it directly to VDDIO through a 10 kohm resistor for normal operation; a low on TST at reset activates boundary-scan mode and prevents application code from booting. Ensure NRST (pin 61) has a 10 kohm pull-up and a 100 nF cap to ground for clean power-on reset; a missing reset cap can cause intermittent boot failures in noisy industrial environments. Verify that the BOOT pins select the correct memory map (Flash vs SAM-BA bootloader) before firmware upload.
The Cortex-M4 SWD pins (SWDIO/SWDCLK) require 100 kohm internal pull-ups that are enabled by default; in noisy motor-drive environments add external 10 kohm pull-ups on SWDIO and SWDCLK for reliable JTAG/SWD connection. Avoid routing ADC analog inputs near PWM outputs; the ATSAM4S8BA-AUR's ADC accuracy degrades by 1-2 LSB when sampled within 50 ns of a PWM edge transition. Use the AFEC (Analog Front End Controller) averaging mode to improve SNR by 3 dB per doubling of oversample count.
合規資訊
Microchip SAM4S family is RoHS compliant and lead-free per the device product page; the part carries the Green marketing designation. AEC-Q100 is not applicable for general industrial / consumer use - Microchip's automotive SAM V7x/SAM S7x families are the AEC-Q100 qualified siblings.
