ATSAM4S4CA-CFU - 120MHz Cortex-M4 MCU, 256KB Flash | Microchip
MPN： ATSAM4S4CA-CFU ✓ 啟用中ATSAM4S4CA-CFU 概覽
An ARM Cortex-M4 MCU is a 32-bit reduced-instruction-set (RISC) processor core that integrates a CPU, memory, and peripherals on a single chip, serving as the central controller in embedded systems. Within the product hierarchy, the SAM4S sits between entry-level Cortex-M0+ devices and high-performance Cortex-M7 MCUs, and the ATSAM4S4CA-CFU occupies the mid-memory-density tier of the SAM4S family, complemented by larger siblings in the power-management and embedded-control landscape.
Key features include a 120 MHz Cortex-M4 core with single-cycle MAC and hardware FPU support in the family, 256KB flash with page-erase programming, and pin-to-pin compatibility across the SAM4S, SAM4N, SAM3S, SAM3N and SAM7S portfolios, which simplifies migration and footprint reuse. The 100-VFBGA (7x7 mm) ball-grid-array keeps board area minimal for space-constrained industrial designs.
From a technical perspective, the SAM4S series combines scalable performance with memory density and power efficiency. The Cortex-M4 core delivers deterministic real-time response with nested vectored interrupts, and the memory bus architecture sustains full-speed flash execution at 120 MHz with flash accelerator techniques typical of the Atmel/Microchip SMART family.
Typical applications include industrial automation controllers, sensor hubs and data loggers, embedded networking nodes, and consumer portable devices where a compact 100-ball BGA and 256KB flash provide the right balance of cost and capability.
Design consideration: 100-VFBGA packages require microvia or HDI PCB technology; verify your fab capability for 0.8 mm or finer ball pitch before layout, and plan power decoupling on every supply ball pair.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, making it a one-stop reference for the ATSAM4S4CA-CFU.
直接替換替代品，適用於 ATSAM4S4CA-CFU — 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： ATSAM4S4CA-CFU （相同外形與佔位） — 差異在於 Package, Operating Temperature, RoHS Status, Flash Memory, ADC.
ATSAM4S2CA-CFU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S16CA-CFU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S16CA-CU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4N8CA-CFU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S8CA-CFU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4SD32CA-CFU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S8CA-CFNR
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAM4S4CA-CFU 最大額定值與電氣特性
| Core Processor | ARM Cortex-M4 |
| Core Size | 32-bit, single-core |
| 最大時脈頻率 | 120 MHz |
| Flash Memory Size | 256KB (256K x 8) |
| Package Type | 100-VFBGA (7x7 mm) |
| Package Code | VFBGA, square, ball terminal |
| Number of Terminals | 100 |
| 安裝類型 | Surface Mount |
| Operating Temperature Grade | Industrial |
| Family | SAM4S (Atmel SMART ARM-based MCU) |
| Environmental Attribute | Green package |
| Moisture Sensitivity Level | MSL A (per FindIC listing: MRL A) |
| Program Memory Type | FLASH |
| Terminal Form | Ball |
| Package Shape | Square |
| 資料匯流排寬度 | 32 bit |
ATSAM4S4CA-CFU square 腳位配置指南
ATSAM4S4CA-CFU（square 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： ATSAM4S4CA-CFU.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATSAM4S4CA-CFU 適用於 6 應用s: Industrial Automation Controllers, Sensor Hubs and Data Loggers, Embedded Networking Nodes, Portable and Battery-Powered Devices, Motor Control and Power Conversion, Consumer IoT and Smart Home Devices.
Industrial Automation Controllers
The ATSAM4S4CA-CFU suits industrial automation nodes because its 120 MHz ARM Cortex-M4 core provides deterministic real-time response for control loops, while the industrial temperature grade ensures reliability on factory floors. The 256KB flash accommodates protocol stacks such as Modbus or CANopen alongside application firmware. In a typical PLC I/O module, the MCU runs the communication state machine and local control logic, with the Cortex-M4 MAC accelerating PID computations. Compared with slower Cortex-M0+ controllers, the 120 MHz clock closes control loops faster; compared with higher-cost devices, the SAM4S keeps bill-of-materials cost low. Pin-to-pin compatibility across the SAM4S family also lets manufacturers scale flash size per product tier on one PCB.
推薦
Sensor Hubs and Data Loggers
For battery-powered sensor hubs and data loggers, the ATSAM4S4CA-CFU combines processing performance with power efficiency: the Cortex-M4 architecture executes sampling, filtering and timestamping code quickly, allowing the system to spend more time in low-power sleep modes. The 256KB flash stores logging firmware plus a small file system, and the 100-VFBGA (7x7 mm) package keeps sensor-node PCB area minimal. In practice the MCU reads I2C/SPI sensors, applies digital filtering using the single-cycle MAC, and buffers records to external memory. The family's power-management controller gates clocks to unused peripherals, reducing average current draw - a key metric for multi-year battery deployments in condition-monitoring and environmental sensing applications.
推薦
Embedded Networking Nodes
Embedded networking endpoints - gateways, protocol converters, and Modbus-to-Ethernet bridges - benefit from the ATSAM4S4CA-CFU's 120 MHz throughput, which sustains packet processing and protocol translation without an external accelerator. The 256KB flash hosts a TCP/IP or fieldbus stack with room to spare, and the single-cycle MAC accelerates checksum computation. In a typical design the MCU manages a UART/SPI/CAN front end and interfaces to an Ethernet MAC/PHY or Wi-Fi module over SPI. The pin-compatible SAM4S portfolio means a higher-flash variant (ATSAM4S16CA-CFU) can be substituted for feature-rich firmware builds without PCB changes, protecting the hardware platform across product variants and field-upgradeable SKUs.
推薦
Portable and Battery-Powered Devices
Handheld instruments, portable medical accessories, and POS peripherals use the ATSAM4S4CA-CFU where its 100-VFBGA 7x7 mm footprint and integrated peripherals reduce board height and area for slim enclosures. The 120 MHz Cortex-M4 renders menus, runs touch-decode algorithms, and manages secure transactions responsively, while sleep modes stretch battery life between charges. The 256KB flash stores application code plus fonts and localization strings. Designers typically drive an SPI or parallel display, sample a resistive/capacitive touch controller, and manage Li-Ion charging supervision via ADC channels. The industrial temperature rating also qualifies the design for vehicle-mounted or outdoor portable equipment where consumer-grade MCUs would be marginal.
推薦
Motor Control and Power Conversion
The ATSAM4S4CA-CFU fits digital motor-control subsystems because the Cortex-M4 core's single-cycle multiply-accumulate and deterministic interrupt latency support FOC (field-oriented control) inner loops at the 120 MHz clock. The 256KB flash holds the control firmware plus field-weakening and protection routines. In a typical three-phase BLDC/PMSM drive, the MCU reads current-sense ADC results, executes PI current loops, and updates PWM outputs; the 100-VFBGA package routes dense PWM and analog signals with short traces on HDI boards. The industrial temperature grade suits inverter environments, and the pin-to-pin SAM4S family allows higher-flash parts for units storing multi-protocol communication and diagnostic firmware on the same PCB.
推薦
Consumer IoT and Smart Home Devices
Smart-home controllers, connected appliances, and IoT edge nodes deploy the ATSAM4S4CA-CFU for its balance of cost (approximately $2-5 in single quantity as of 2026-09-20), performance, and compact 100-VFBGA packaging. The 120 MHz Cortex-M4 runs TLS pre-processing and sensor fusion while offloading radio work to a Wi-Fi/BLE module over UART or SPI. The 256KB flash accommodates the application, a lightweight OTA bootloader, and configuration storage. Designers value the SAM4S pin-compatible roadmap: a shortage of the 256KB part can be bridged with ATSAM4S16CA-CFU (1MB) without requalifying the PCB. The green package aligns with consumer-market environmental requirements across global markets.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAM4S4CA-CFU — 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 | ATSAM4S2CA-CFU | ATSAM4S16CA-CFU | ATSAM4N8CA-CFU | ATSAM4SD32CA-CFU |
|---|---|---|---|---|---|
| Package | 100-VFBGA (7x7 mm) | 100-VFBGA (7x7) - same | 100-VFBGA (7x7) - same | 100-VFBGA (7x7) - same | 100-VFBGA (7x7) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M4, 120 MHz | ARM Cortex-M4, 120 MHz | ARM Cortex-M4, 120 MHz | ARM Cortex-M4 (SAM4N), 120 MHz | ARM Cortex-M4, 120 MHz |
| Flash Memory | 256KB | 128KB | 1MB | 512KB | 1MB (dual-bank) |
| Family | SAM4S | SAM4S | SAM4S | SAM4N | SAM4SD (dual-bank) |
| Pin-to-Pin Compatible | Yes (SAM4S/SAM4N/SAM3S/SAM3N/SAM7S) | Yes - direct drop-in | Yes - direct drop-in | Yes - per SAM4S datasheet migration note | Yes - direct drop-in |
| Temperature Grade | Industrial | Industrial | Industrial | Industrial | Industrial |
主要差異化特點
- Mid-density 256KB flash at the family's lowest cost tier (對比ATSAM4S16CA-CFU)
- Double the flash of the entry variant with the same footprint (對比ATSAM4S2CA-CFU)
- SAM4S peripheral richness vs SAM4N sibling (對比ATSAM4N8CA-CFU)
設計說明
The 100-VFBGA (7x7 mm) package requires fine-pitch PCB fabrication - typically microvia (HDI) technology with via-in-pad for the dense ball field. Confirm your board house supports the ball pitch escape routing before committing the layout. Assign power and ground ball pairs with local decoupling capacitors (100 nF per supply pair) placed on the layer directly beneath the die. Per the Microchip SAM4S family datasheet, pin-to-pin compatibility with SAM4N/SAM3S/SAM3N/SAM7S devices means the same footprint supports future memory upgrades or cost-downs without re-layout.
Follow the SAM4S family power-supply architecture from the Microchip datasheet: sequence and decouple the core and I/O supply domains per datasheet recommendations, and use the on-chip voltage regulator configuration specified for the 100-VFBGA variant. Add bulk capacitance (4.7-10 uF) near the supply balls plus 100 nF ceramics for high-frequency decoupling. Estimated: total decoupling capacitance should be sized so supply ripple stays within datasheet tolerance at 120 MHz core operation with all peripherals active.
When migrating from other SAM4S variants (e.g., swapping ATSAM4S4CA-CFU for ATSAM4S16CA-CFU or ATSAM4S2CA-CFU), flash size and page-erase parameters change - verify bootloader sector maps and flash programming routines against the specific device's memory map. Also confirm the exact suffix (CFU vs CU vs CFNR) when ordering: these designate ball metallurgy and packaging options and are NOT interchangeable in some procurement/compliance flows. Quote tool matches should always be validated against the Microchip cross-reference search.
合規資訊
Distributor listings describe the part as 'BGA GREEN IND TEMP MRL A', indicating green packaging and industrial temperature grade. Formal RoHS/REACH/halogen certificate copies should be requested from Microchip at order time.
