ATSAM4S2BA-AU - Cortex-M4 120MHz 128KB MCU | Microchip
料号： ATSAM4S2BA-AU ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.88 | $4.88 |
| 10 | $4.52 | $45.20 |
| 100 | $4.2 | $420.00 |
| 500 | $3.95 | $1,975.00 |
| 1,000 | $3.71 | $3,710.00 |
ATSAM4S2BA-AU 概述
A microcontroller (MCU) is a complete computing system on a single chip, combining a processor core, program memory, data memory, and a rich set of peripherals. Within the power management IC and embedded-system hierarchy, the ATSAM4S2BA-AU belongs to the SAM4S family of ARM-based flash MCUs, positioned above entry-level Cortex-M0+ devices and below high-integration SAM4E parts, serving general-purpose embedded control and connectivity nodes.
Key features include 1.62V to 3.6V single-supply operation, a single-precision hardware FPU and DSP instructions for efficient signal processing, and a low power consumption profile of approximately 180 uA/MHz. On-chip peripherals cover 2x USART, 2x TWI (I2C), SPI, USB 2.0 full-speed device port, SSC for I2S audio, a 12-bit 2 Msps ADC, 12-bit DAC, PWM channels, HSMCI for SD/MMC cards, DMA, RTC, and watchdog timers, providing broad system integration without external components.
The Cortex-M4 core executes from flash with 0-wait-state access up to certain speeds via an accelerator (CMCC cache controller), while the flash accelerator sustains near-peak performance at 120 MHz. A multi-layer bus matrix with peripheral DMA channels keeps CPU load low during high-throughput data transfers, and nested vectored interrupt control delivers deterministic real-time response.
Typical applications include industrial control nodes, consumer appliances, USB-connected instruments, SD-card data loggers, and audio/accessory devices where the SSC and I2S path plus FPU acceleration fit well.
Design consideration: validate VDDCORE/VCORE external regulation and decoupling per the SAM4S datasheet; the LQFP-64 footprint is pin-compatible with SAM4N, SAM3S, SAM3N, and SAM7S 64-pin devices, enabling memory-size scalability.
This page synthesizes distributor pricing, pin-compatible upgrade alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： ATSAM4S2BA-AU ——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： ATSAM4S2BA-AU （相同外形与封装尺寸） ——差异在于 RoHS Status, Core, Packaging, USB, SRAM.
快速对比工具——选择替代料号进行并排对比：
ATSAM4S4BA-AU
✅ 直接替换📋 参考替代料（不在目录中）
ATSAM4S8BA-AU
✅ 直接替换✓ 有现货
$3.72 / 个
查看数据手册 →ATSAM4S16CA-AU
✅ 直接替换✓ 有现货
$5.55 / 个
查看数据手册 →ATSAM4S2CA-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.14 / 个
查看数据手册 →ATSAM4SD32CA-AU
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATSAM4S2BA-AU 最大额定值与电气特性
| Core Processor | ARM Cortex-M4 with FPU |
| Core Size | 32-bit |
| 最大时钟频率 | 120 MHz |
| Flash Memory | 128 KB (128K x 8) |
| SRAM | 64 KB |
| Supply Voltage (VDD) | 1.62 V to 3.6 V |
| 封装 | 64-LQFP (10x10 mm) |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (industrial) |
| Connectivity | USB 2.0 Full-Speed Device, USART, TWI (I2C), SPI, SSC |
| ADC Resolution | 12-bit |
| DAC Resolution | 12-bit |
| DMA | Yes, peripheral DMA controller |
| PWM | Yes (PWM controller) |
| Timers | Timer/Counter channels, RTC, Watchdog Timer |
| Memory Card Interface | HSMCI (SD/MMC/eMMC) |
| Power Consumption | 180 uA/MHz class (per Microchip product page) |
| Series | SAM4S (SAM32 Family) |
| RoHS 状态 | Compliant (GREEN, MRL A) |
ATSAM4S2BA-AU 64-lqfp (10x10 mm) 引脚配置指南
ATSAM4S2BA-AU（64-lqfp (10x10 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： ATSAM4S2BA-AU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATSAM4S2BA-AU 适用于 6 应用s: Industrial Control Nodes, SD-Card Data Loggers, USB-Connected Instruments, Audio Accessory Devices, Consumer Appliance Control, Embedded IoT Sensor Nodes.
Industrial Control Nodes
The ATSAM4S2BA-AU fits factory automation sensor and actuator nodes because its 120 MHz Cortex-M4 with DSP instructions handles control loops and protocol stacks simultaneously, while 128 KB flash is sufficient for Modbus or CAN-gateway firmware. The industrial -40C to +85C temperature grade and 1.62V to 3.6V tolerance on 3.3V rails suit noisy panel environments. Multiple USARTs and TWI/I2C interfaces drive HMI displays and field peripherals; the peripheral DMA offloads serial traffic so the CPU stays responsive. Unlike 8-bit MCUs, the hardware FPU executes PID and filtering math in single-cycle multiply-accumulate, tightening loop determinism at essentially no power cost.
推荐
SD-Card Data Loggers
For data-acquisition loggers, the ATSAM4S2BA-AU pairs its HSMCI (high-speed multi-media card interface) with peripheral DMA to write SD/SDIO cards at bus speed without CPU stalls, while the 12-bit 2 Msps ADC digitizes sensors. The 64 KB SRAM buffers burst data between card write cycles, and the USB 2.0 full-speed device port lets users offload logs as a mass-storage device with no extra components. At 180 uA/MHz class consumption and backup modes, battery-powered field loggers achieve multi-year shelf life. The SSC interface also accepts external audio or data streams if the logger must capture mixed-signal sources.
推荐
USB-Connected Instruments
The ATSAM4S2BA-AU's native USB 2.0 full-speed device controller with dedicated DMA makes it a natural fit for bench instruments, dongles, and PC-connected sensors implementing CDC, HID, or vendor classes. The 120 MHz Cortex-M4 digests acquisition data before transmission, and the 12-bit DAC generates stimulus waveforms for loopback tests. Firmware updates ship over the USB bootloader, eliminating field programming fixtures. With 128 KB flash there is room for a small protocol stack plus calibration tables, and pin-compatibility with ATSAM4S4BA/8BA means a later memory upgrade needs no PCB change.
推荐
Audio Accessory Devices
The ATSAM4S2BA-AU includes an SSC (synchronous serial controller) that supports I2S-style audio links, making it suitable for headsets, speakers, and intercom accessories that pass or process audio streams. The Cortex-M4 DSP instructions execute filter and codec math efficiently with the single-precision FPU, and the 12-bit DAC/ADC pair handles analog side-channels such as button detection or simple voice capture. USB device connectivity supports battery-charging negotiation signaling and PC configuration tools. At 120 MHz there is adequate headroom for echo suppression kernels, and low-power wait modes preserve battery life in standby.
推荐
Consumer Appliance Control
Appliance main boards benefit from the ATSAM4S2BA-AU's combination of PWM outputs for heater and motor drive, 12-bit ADC for NTC temperature sensing, and TWI/I2C for user-interface controllers. The 120 MHz core compresses UI response and control loops into one device, while 128 KB flash holds multi-language menus and OTA-style update scaffolding. The industrial temperature range covers enclosed appliance interiors, and the RoHS-compliant GREEN package meets consumer environmental requirements. Pin-compatibility across the SAM4S 64-LQFP family lets one PCB serve both base and premium SKUs by changing only the MCU order code.
推荐
Embedded IoT Sensor Nodes
For wired IoT endpoints, the ATSAM4S2BA-AU provides the compute for TLS-ready firmware partitions within 128 KB flash for compact stacks, 64 KB SRAM for buffers, and serial interfaces (USART, TWI, SPI) to attach radio modules or Ethernet bridges. The 180 uA/MHz class efficiency plus sleep modes suits mains-adjacent and battery-backed nodes. The 12-bit ADC reads analog sensors directly, and CRC peripherals offload integrity checks on packed telemetry. Because the LQFP-64 footprint is shared with SAM4N/SAM3S devices, designers can scale cost or add low-power variants without respinning the PCB.
推荐
推荐产品汇总
工程参考数据： ATSAM4S2BA-AU ——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 | ATSAM4S4BA-AU | ATSAM4S8BA-AU | ATSAM4S16CA-AU | ATSAM4S2CA-AU | ATSAM4SD32CA-AU |
|---|---|---|---|---|---|---|
| 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 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Max Frequency | Cortex-M4 with FPU, 120 MHz | Cortex-M4 with FPU, 120 MHz | Cortex-M4 with FPU, 120 MHz | Cortex-M4 with FPU, 120 MHz | Cortex-M4 with FPU, 120 MHz | Cortex-M4 with FPU, 120 MHz |
| Flash Memory | 128 KB | 256 KB | 512 KB | 1024 KB | 128 KB | 256 KB (dual-bank) |
| SRAM | 64 KB | 64 KB | 64 KB | 128 KB | 64 KB | 64 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 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Pin-to-Pin Compatible (64-LQFP) | Yes (SAM4S family) | Yes | Yes | Yes | Yes | Yes |
关键差异点
- Lowest-cost entry point of the pin-compatible SAM4S 64-LQFP ladder （对比 ATSAM4S4BA-AU)
- Identical footprint with a clear upgrade path （对比 ATSAM4S8BA-AU)
- Industrial temperature with full peripheral set （对比 ATSAM4S16CA-AU)
设计说明
Supply the ATSAM4S2BA-AU from a single 3.3V rail within 1.62V to 3.6V; VDDCORE is derived by the internal regulator and requires the datasheet-specified external capacitor on its pin. Add 100 nF ceramic decoupling at each VDD pin plus one 4.7-10 uF bulk capacitor, placed within 2 mm of the supply pins. Estimated: at 120 MHz full-speed operation, active current is on the order of tens of milliamps; budget the 3.3V regulator accordingly and verify VDDCORE capacitor value against Microchip SAM4S datasheet 60001419B reference designs.
The 64-LQFP (10x10 mm) footprint is pin-compatible with SAM4N, SAM3S, SAM3N, and SAM7S 64-pin devices, so route all GPIO pads to test points where practical - this preserves a memory-size upgrade path to ATSAM4S4BA-AU or ATSAM4S8BA-AU without respinning. Keep the crystal and its load capacitors close to the XIN/XOUT pins with a solid ground guard; keep USB D+/D- as a matched 90-ohm differential pair routed together away from switching sources.
Do not confuse package suffixes: ATSAM4S2BA-UURR is a QFN-style package and is NOT footprint-compatible with the LQFP ATSAM4S2BA-AU despite sharing the same die. Also, VDDIO domains and 5V tolerance limits must be checked before connecting non-3.3V peripherals - SAM4S I/O is not 5V tolerant on all pins. Finally, when swapping from SAM3S/SAM7S legacy parts, re-verify peripheral clock configuration and flash wait-state settings, since the SAM4S bus architecture differs.
Estimated: at 120 MHz with all peripherals active, dissipation is roughly 3.3V x ~40 mA = ~130 mW. The 64-LQFP 10x10 mm package junction-to-ambient thermal resistance is on the order of 50 C/W (verify exact value in datasheet 60001419B), giving a junction rise of only ~7 C above ambient - no heatsinking or thermal pad is required. Thermal design only becomes relevant if you drive high continuous loads through GPIO or pin-diode circuits powered from the MCU rails.
合规信息
Microchip listing describes the part as GREEN IND TEMP MRL A (moisture sensitivity level A), indicating a green/lead-free process. REACH, halogen-free, and conflict-minerals status not stated in the provided data.