ATSAM3U1CA-CU - 96MHz Cortex-M3 MCU 64KB Flash | Microchip
MPN: ATSAM3U1CA-CU ✓ Hoạt độngATSAM3U1CA-CU Tóm tắt
A microcontroller (MCU) is a complete computing system on a single chip, integrating a processor core, program memory, data memory, and peripherals. The ATSAM3U1CA-CU belongs to the ARM Cortex-M3 family of 32-bit embedded processors, positioned within the broader hierarchy of microprocessors and system-on-chip (SoC) devices for power-management and embedded control applications.
Key features include the ARM Cortex-M3 revision 2.0 core with Memory Protection Unit (MPU) and Thumb-2 instruction set, high-speed USB connectivity with an integrated transceiver for fast data up/downloading, robust EMI tolerance, and plug-and-play high-speed serial communication. The 128-bit-wide flash access improves instruction fetch efficiency, and the device operates from a 1.62 V to 3.6 V single supply.
The SAM3U architecture emphasizes USB data throughput: the embedded high-speed USB device port (480 Mbps capable transceiver) offloads data transfers from the CPU, while DMA channels move data between peripherals and memory without core intervention. This makes the device well suited to bridge USB host systems with data-acquisition, storage, and communication peripherals.
Typical applications include USB data loggers and high-speed data acquisition systems, industrial communication gateways, embedded control panels, and consumer devices requiring fast USB file transfer with robust EMI performance.
Designers should note the 64 KB flash and 20 KB SRAM capacity limits when sizing applications; the pin-compatible ATSAM3U2CA-CU and ATSAM3U4CA-CU in the same 100-TFBGA package offer 128 KB and 256 KB flash respectively, providing an upgrade path without PCB changes.
This page synthesizes distributor inventory, drop-in alternatives, comparison tables, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho ATSAM3U1CA-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 ATSAM3U1CA-CU (cùng hình factor và footprint) — khác nhau ở Package, Flash Memory, SRAM, Core Processor, Flash Organization.
ATSAM3U2CA-CU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAM3U4CA-CU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAM3U1CA-AU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAM3U1CA-CU Tỷ lệ tối đa & tính chất điện
| Core Processor | ARM Cortex-M3 (revision 2.0) |
| Core Size | 32-bit |
| Tần số xung maksimum | 96 MHz |
| Program Memory Size | 64 KB (64K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 20 KB (20K x 8) |
| Supply Voltage Range | 1.62 V to 3.6 V |
| USB | High-speed USB device with integrated transceiver |
| Memory Protection Unit | Yes (MPU) |
| Instruction Set | Thumb-2 |
| Series | SAM3U |
| Hộp | 100-TFBGA (9 x 9 mm) |
| Kiểu lắp đặt | Surface Mount |
| Number of Pins / Balls | 100 |
| EMI Performance | Robust EMI tolerance (per Atmel/Microchip product description) |
| Trạng thái RoHS | Compliant (per distributor listings) |
Hướng dẫn cấu hình chân ATSAM3U1CA-CU 100-tfbga (9 x 9 mm)
Cấu hình chân cho ATSAM3U1CA-CU (100-tfbga (9 x 9 mm) 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 ATSAM3U1CA-CU.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
ATSAM3U1CA-CU phù hợp cho 6 Áp dụngs: High-Speed USB Data Loggers, Industrial Communication Gateways, Embedded Control Panels, Consumer Devices with USB File Transfer, EMI-Sensitive Measurement Equipment, USB Bridge and Programming Adapters.
High-Speed USB Data Loggers
The ATSAM3U1CA-CU fits USB data-logger designs because its integrated high-speed USB device transceiver (480 Mbps capable) transfers logged data to host PCs far faster than full-speed alternatives, without an external PHY. The 96 MHz Cortex-M3 core with DMA offloads transfer management, while the 64 KB flash stores the USB stack, file system, and acquisition firmware and 20 KB SRAM buffers sample streams. Used between sensor front-ends and a USB host, the device performs acquisition locally and streams or dumps data on connect. The trade-off: for continuous high-rate streaming, firmware must manage the 20 KB SRAM buffer carefully to avoid underflow at high sample rates.
Được đề xuất
Industrial Communication Gateways
In industrial gateways, the ATSAM3U1CA-CU bridges USB hosts to serial field devices, leveraging the SAM3U family's plug-and-play high-speed serial support and robust EMI tolerance cited in the Atmel product description. The 96 MHz Cortex-M3 with MPU provides the deterministic performance and memory isolation needed for protocol conversion between USB and UART/SPI/I2C industrial buses. Its 1.62 V to 3.6 V supply range supports standard 3.3 V industrial logic levels. The MPU enables partitioning of safety-critical protocol stacks from the USB stack, improving fault containment in always-on installations where a USB crash must not interrupt field-side communication.
Được đề xuất
Embedded Control Panels
For embedded control panels and HMI boards, the ATSAM3U1CA-CU offers a 96 MHz 32-bit core with sufficient performance for touch decoding, display refresh via serial interfaces, and USB configuration ports. The 64 KB flash accommodates a control application plus a USB device stack for firmware updates and configuration download, a core SAM3U use case (fast up/downloading of data). The 100-ball TFBGA's 9 x 9 mm footprint keeps board area small for compact panel designs. The Memory Protection Unit guards the UI task from USB-stack faults, improving field reliability in kiosk and machine-control environments where unattended operation is required.
Được đề xuất
Consumer Devices with USB File Transfer
Consumer products that exchange files with PCs - media accessories, card readers, portable instruments - benefit from the ATSAM3U1CA-CU's integrated high-speed USB transceiver, which the Atmel datasheet highlights for fast up/downloading of data and plug-and-play operation. The 128-bit-wide flash architecture sustains efficient code execution at 96 MHz while USB transfers proceed via DMA. The 1.62 V to 3.6 V operating range and small 9 x 9 mm TFBGA suit battery-powered, space-constrained enclosures. Designers should budget the 20 KB SRAM between USB endpoints, file buffers, and application stacks, moving bulk data through DMA to SRAM in double-buffered blocks for sustained throughput.
Được đề xuất
EMI-Sensitive Measurement Equipment
Bench instruments and measurement modules exploit the SAM3U family's documented robust EMI tolerance. The ATSAM3U1CA-CU's integrated USB transceiver avoids external PHY switching noise near sensitive analog front-ends, and the 1.62 V to 3.6 V supply allows clean, well-filtered low-voltage rails. The 96 MHz Cortex-M3 processes DSP-style filtering while DMA moves ADC samples; the MPU separates measurement firmware from the USB reporting stack. Designers should place the TFBGA over a solid ground plane and use Microchip's SAM3U reference-design decoupling pattern to preserve the EMI performance cited in the product description, particularly around the USB ball group.
Được đề xuất
USB Bridge and Programming Adapters
Debug probes, ISP adapters, and USB-to-serial bridges use the ATSAM3U1CA-CU's defining strength: high-speed USB with an integrated transceiver for fast code download to target devices, as stated directly in the Atmel SAM3U product description. The 96 MHz core runs protocol layers while DMA sustains endpoint throughput; 64 KB flash holds the bridge firmware and descriptors, and 20 KB SRAM provides endpoint and pipe buffering. The 9 x 9 mm 100-TFBGA keeps adapter dongles compact. Design considerations include implementing the USB 2.0 compliance network on the DP/DM balls exactly per the datasheet reference design and reserving SRAM headroom for variable-length transfer buffers.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAM3U1CA-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 | ATSAM3U2CA-CU | ATSAM3U4CA-CU | ATSAM3U1CA-AU |
|---|---|---|---|---|
| Package | 100-TFBGA (9 x 9 mm) | 100-TFBGA (9 x 9 mm) - same | 100-TFBGA (9 x 9 mm) - same | 100-TFBGA (9 x 9 mm) - same (verify suffix ballout) |
| Brand | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Core / Max Speed | ARM Cortex-M3, 96 MHz | ARM Cortex-M3, 96 MHz | ARM Cortex-M3, 96 MHz | ARM Cortex-M3, 96 MHz |
| Flash Memory | 64 KB | 128 KB (+100%) | 256 KB (+300%) | 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 |
| High-Speed USB | Yes (integrated transceiver) | Yes (integrated transceiver) | Yes (integrated transceiver) | Yes (integrated transceiver) |
Bảo phân biệt quan trọng
- Lowest-memory (lowest-cost) 100-TFBGA SAM3U option (vsATSAM3U2CA-CU)
- Upgrade path to 4x flash without PCB change (vsATSAM3U4CA-CU)
- Integrated high-speed USB transceiver (vsATSAM3N4BA-MU)
Ghi chú thiết kế
The 100-TFBGA (9 x 9 mm) with 0.8 mm ball pitch requires controlled-impedance layout for the high-speed USB balls. Route DP/DM as a 90-ohm differential pair with length matching within 0.5 mm, and place the USB compliance resistor network per the SAM3U datasheet reference design. Use a solid ground plane on the layer immediately beneath the BGA, with via-in-pad or dog-bone fanout and at least one decoupling capacitor per supply ball pair placed within 2 mm.
The device operates from 1.62 V to 3.6 V; use a low-noise LDO or well-filtered buck output. Add 100 nF ceramic decoupling at every VDD ball plus bulk 10 uF per supply domain. Estimated: at 96 MHz the SAM3U core current is on the order of tens of mA - verify the exact figure against the SAM3U datasheet power consumption chapter for your voltage and clock configuration rather than relying on this estimate.
A frequent SAM3U pitfall is underestimating the 64 KB flash budget: the high-speed USB device stack plus descriptors can consume a large fraction, leaving little for application code. If your compiled image exceeds roughly 48 KB, select the pin-compatible ATSAM3U2CA-CU (128 KB) or ATSAM3U4CA-CU (256 KB) instead - same 100-TFBGA footprint, no PCB change. Also confirm the lock-bit and boot-mode strap configuration before mass production to avoid bricking during field programming.
Thông tin tuân thủ
RoHS compliance and lead-free status inferred from the 'CU' suffix designation in Atmel/Microchip ordering nomenclature per distributor listings. REACH, halogen-free, and conflict-minerals declarations not found in retrieved data - verify on Microchip's product compliance page.
