ATSAM3U2CA-CU - 96MHz Cortex-M3 MCU | Microchip
MPN: ATSAM3U2CA-CU ✓ Hoạt độngATSAM3U2CA-CU Tóm tắt
A flash microcontroller is a microcontroller category defined by a CPU, program memory, data memory, and integrated peripherals. Within the embedded semiconductor hierarchy, this device is an ARM Cortex-M3 RISC MCU, an SAM3U-series member, and a general-purpose embedded processing platform. The ARM Cortex-M3 core provides a 32-bit processing architecture suited to control logic, communication bridges, data logging, and human-interface systems that require more capability than an 8- or 16-bit MCU.
The ATSAM3U2CA-CU combines a 96 MHz maximum clock with 128 KB of Flash and 36 KB of SRAM. The SAM3U family is specifically positioned for USB applications, including data loggers, PC peripherals, and high-speed bridges such as USB-to-SDIO, USB-to-SPI, and USB-to-external-bus interfaces. Its integrated USB capability makes the part relevant to compact USB-connected embedded products rather than general-purpose USB host controllers.
The ATSAM3U2CA-CU is available in a compact 100-pin TFBGA package with a 0.8 mm pitch and green package construction. This fine-pitch ball-grid arrangement supports space-constrained designs but requires careful PCB layout, assembly process control, and adequate solder-ball inspection. The package also requires careful escape-routing planning because fine-pitch BGAs can complicate access to internal pins during design and rework.
Typical applications include USB-to-serial or USB-to-SPI bridges, compact data loggers, PC peripheral controllers, embedded human-interface devices, and industrial equipment requiring a 96 MHz Cortex-M3 core. For USB designs, engineers should evaluate the required USB speed, endpoint count, transceiver implementation, power-supply sequencing, and firmware requirements against the family documentation before finalizing the board.
The primary design consideration is package complexity. Unlike a leaded or larger-pitch MCU package, the 9 mm by 9 mm, 100-ball TFBGA requires a PCB design capable of supporting 0.8 mm ball pitch, small component clearances, and controlled assembly. The verified supply information also identifies ATSAM3U2CA-CU as a factory-programmable configuration, so firmware provisioning and order traceability should be reviewed with Microchip before production release.
This product summary combines manufacturer-family data with distributor specifications, package details, sourcing information, and verified cross-reference results. It also separates confirmed drop-in alternatives from related family devices, helping engineers avoid treating mechanically similar but electrically different MPNs as direct replacements.
Bộ thay thế dễ dàng lắp đặt cho ATSAM3U2CA-CU — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATSAM3U2CA-CU (cùng hình factor và footprint) — khác nhau ở Package, Flash Memory, SRAM, Series, Operating Temperature.
Không có bộ thay thế dễ dàng lắp đặt sẵn có cho sản phẩm này.
Yêu cầu các bộ thay thếATSAM3U2CA-CU Tỷ lệ tối đa & tính chất điện
| Product Type | 32-bit ARM Cortex-M3 RISC flash microcontroller |
| Manufacturer | Microchip Technology |
| Series | SAM3U |
| CPU Core | ARM Cortex-M3 |
| Architecture | 32-bit RISC |
| Maximum CPU Frequency | 96 MHz |
| Flash Memory | 128 KB |
| Flash Organization | 128K x 8 |
| SRAM | 36 KB |
| Operating Voltage Range | 1.62 V to 3.6 V |
| Supported Supply Configurations | 1.8 V / 2.5 V / 3.3 V |
| Hộp | 100-pin TFBGA, 9 mm x 9 mm |
| Ball Pitch | 0.8 mm |
| Package Construction | Green |
| Kiểu lắp đặt | Surface Mount |
| Programming Configuration | Factory programmable |
| Packaging | Tray |
Hướng dẫn cấu hình chân ATSAM3U2CA-CU green
Cấu hình chân cho ATSAM3U2CA-CU (green gói). IC số này bao gồm chân GPIO, giao diện truyền thông (UART, SPI, I2C) và chân nguồn. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết các chức năng chân thay thế và tùy chọn cấu hình. Cực kỳ quan trọng cho thiết kế hệ thống tích hợp và lập trình PCB.
Không có dữ liệu chân cụ thể sẵn có cho ATSAM3U2CA-CU.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
ATSAM3U2CA-CU phù hợp cho 6 Áp dụngs: USB-to-SPI Bridge, USB-to-SDIO Bridge, USB Data Logger, PC Peripheral Controller, Industrial USB Bridge, Embedded Human-Interface Controller.
USB-to-SPI Bridge
The ATSAM3U2CA-CU fits a USB-to-SPI bridge because the SAM3U family is specifically identified for high-speed USB bridges, while the device provides a 96 MHz ARM Cortex-M3 core, 128 KB of Flash, and 36 KB of SRAM for protocol handling and data buffering. A typical design would place the MCU between a USB connector and an external SPI target, with the controller translating commands and managing transfer state. The 128 KB program store offers twice the capacity of the 64 KB-flash ATSAM3U1CB-CU comparison part, although USB timing, endpoint requirements, transceiver details, and board-level power sequencing must be confirmed from the full device documentation.
Được đề xuất
USB-to-SDIO Bridge
The ATSAM3U2CA-CU is suitable for an embedded USB-to-SDIO bridge because the manufacturer identifies the SAM3U family as especially suited to USB-to-SDIO bridges. Its 96 MHz Cortex-M3 processor can manage command translation, buffer movement, and status reporting between a USB host and SDIO device, while 36 KB of SRAM supports short-lived protocol and transfer buffers. The 100-pin TFBGA can reduce board area but introduces a 0.8 mm-pitch assembly requirement. Designers should verify pin multiplexing, USB clock requirements, interface timing, voltage levels, and firmware support before committing to the USB peripheral and SDIO signal assignments.
Được đề xuất
USB Data Logger
The ATSAM3U2CA-CU fits a compact USB data logger where a host interface, sensor acquisition, and local configuration must share one embedded platform. Its 96 MHz Cortex-M3 core provides processing capacity, 128 KB of Flash stores firmware and configuration, and 36 KB of SRAM supports acquisition and transfer buffers. The manufacturer specifically lists data loggers as a SAM3U application, making the device family aligned with this use case. A practical design must budget memory for buffering, confirm USB enumeration behavior, and preserve brownout-safe data through power loss. The fine-pitch TFBGA also requires assembly capability and careful USB connector and ground-plane placement.
Được đề xuất
PC Peripheral Controller
The ATSAM3U2CA-CU is applicable to a dedicated PC peripheral controller that receives USB commands and controls local I/O, indicators, relays, or storage. The 96 MHz ARM Cortex-M3 core offers more general processing capability than a small 8-bit controller, while 128 KB of Flash and 36 KB of SRAM are sufficient for firmware, configuration, and short transfer buffers. The SAM3U family's stated support for PC peripherals aligns directly with this role. Designers should confirm USB device-class requirements, available I/O multiplexing, clock and reset behavior, and whether the 100-ball package can be serviced by the chosen PCB assembly process without excessive rework cost.
Được đề xuất
Industrial USB Bridge
The ATSAM3U2CA-CU can serve as the controller in an industrial USB-to-serial or USB-to-fieldbus bridge when its 1.62 V to 3.6 V operating range and 96 MHz processing capability fit the system. Its 128 KB Flash and 36 KB SRAM support protocol stacks, diagnostics, and configuration storage, while the SAM3U family's USB-bridge positioning matches the intended architecture. An industrial implementation should include robust input protection, defined power-fail behavior, communication isolation where required, and careful grounding between USB and external interfaces. The exact peripheral mix, USB transceiver implementation, and pin multiplexing must be checked against the complete device pin table before schematic release.
Được đề xuất
Embedded Human-Interface Controller
The ATSAM3U2CA-CU is appropriate for an embedded keyboard, control panel, or configuration interface that connects to a USB host and manages buttons, LEDs, displays, or local status feedback. Its 96 MHz Cortex-M3 core can handle USB enumeration and event-driven UI logic, while 128 KB of Flash provides ample room for firmware and interface tables. Compared with the 64 KB-flash ATSAM3U1CB-CU, this device preserves more code and data headroom for larger USB stacks or graphics workflows. The design must still verify available GPIO and peripheral assignments, debouncing resources, power requirements, and the manufacturing capability needed for the 9 mm by 9 mm, 0.8 mm-pitch TFBGA.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAM3U2CA-CU — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này |
|---|---|
| Package | 100-pin TFBGA, 9 mm x 9 mm |
| Brand | Microchip Technology |
| CPU Core | ARM Cortex-M3 |
| Maximum Clock Speed | 96 MHz |
| Flash Memory | 128 KB |
| SRAM | 36 KB |
| Operating Voltage Range | 1.62 V to 3.6 V |
| Architecture | 32-bit RISC |
| Ball Pitch | 0.8 mm |
| Programming | Factory programmable |
Bảo phân biệt quan trọng
- Larger Flash capacity than the ATSAM3U1CB-CU comparison device (vsATSAM3U1CB-CU)
- Lower SRAM requirement than the higher-memory SAM3U4 comparison device (vsATSAM3U4CA-CU)
- Factory-programmable sourcing route for application-specific firmware (vsATSAM3U1CB-CU)
Ghi chú thiết kế
Treat the 100-pin TFBGA as a fine-pitch BGA design rather than a conventional leaded MCU layout. The verified package is 9 mm by 9 mm with a 0.8 mm ball pitch, so the PCB stack-up, pad geometry, solder-mask definition, and assembly process must be capable of resolving the available pad spacing. Route escape lines on multiple PCB layers where necessary, but preserve the manufacturer's ball and pad definitions. Do not substitute a generic BGA footprint solely by ball count; verify the exact TFBGA land pattern against the package drawing.
Design the supply network for the verified 1.62 V to 3.6 V operating range while using the appropriate 1.8 V, 2.5 V, or 3.3 V configuration for the complete system. Separate core, I/O, and USB-related supply requirements according to the manufacturer pin definitions, and calculate the maximum current for all attached USB and peripheral loads. Place local bypass capacitors at the corresponding power pins with short return paths. Exact capacitor values, sequencing, and allowable combinations are not included in the supplied excerpts and must be taken from the full manufacturer datasheet.
USB signal integrity begins with a continuous reference plane and controlled return paths beneath the controller and connector routes. Keep high-speed USB traces short, avoid stubs, and follow the device and connector layout guidance. The controller's 0.8 mm-pitch BGA also complicates access to internal balls, so plan escape routing and test-point locations before placement. Confirm whether the selected board assembly method supports the package and whether exposed-pad, thermal, or ground-ball requirements apply to the exact package drawing.
Do not treat related SAM3U MPNs as interchangeable simply because several use 100-pin packages or a 96 MHz Cortex-M3 core. ATSAM3U1CB-CU has only 64 KB of Flash, ATSAM3U4CA-CU has 256 KB of Flash and 50 KB of SRAM, and ATSAM3U2CA-AU may use a different package option. Validate memory size, pin multiplexing, USB configuration, peripheral availability, supply pins, package drawing, and binary firmware compatibility. Also confirm that any factory-programmed ATSAM3U2CA-CU inventory contains the correct customer firmware and traceability.
Thông tin tuân thủ
The verified package listing identifies a green 100-pin TFBGA construction, but it does not explicitly establish RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals compliance for the exact ordering code.
