ATSAMA5D21B-CUR - 500MHz Cortex-A5 MPU | Microchip
料号： ATSAMA5D21B-CUR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.85 | $12.85 |
| 10 | $11.57 | $115.70 |
| 100 | $10.28 | $1,028.00 |
| 500 | $9.42 | $4,710.00 |
| 1,000 | $8.56 | $8,560.00 |
ATSAMA5D21B-CUR 概述
An embedded microprocessor unit (MPU) is a general-purpose processor core intended to run a full operating system such as Linux, as distinct from a microcontroller (MCU) that typically runs bare-metal or RTOS firmware. Within the product hierarchy, the SAMA5D2 is an application-class MPU built on the ARM Cortex-A5 architecture, which itself belongs to the ARMv7-A family of 32-bit application processors. The Cortex-A5 delivers roughly 1.57 DMIPS/MHz with an optional NEON SIMD unit, positioning it between the low-end Cortex-M class and the higher-performance Cortex-A7/A9 cores.
Key features of the ATSAMA5D21B-CUR include a 500 MHz maximum core clock, 128 KB internal SRAM, a 16-bit DDR2/DDR3L/LPDDR2/LPDDR3 external memory controller, and support for QSPI and e.MMC flash. The device integrates an embedded audio subsystem with a fractional PLL, a 12-bit ADC, and a comprehensive security block including secure boot, TRNG, and tamper detection. Its ultra-low-power architecture reaches 5 uA in backup mode, making it suitable for battery-backed designs.
The SAMA5D2 architecture uses a 32-bit ARMv7-A core with 32 KB instruction and 32 KB data L1 caches, a 128 KB L2 cache, and a multi-layer AHB bus matrix. The 0.8 mm ball pitch TFBGA package reduces PCB design complexity compared with finer-pitch alternatives, allowing lower-cost fabrication and simpler routing for 4- to 6-layer boards.
Typical applications include industrial HMI panels, IoT gateways, point-of-sale terminals, building automation controllers, and portable medical devices. The combination of 500 MHz performance, integrated audio, and 5 uA backup current fits designs that must wake quickly from sleep while maintaining long battery life.
When designing with this MPU, pay close attention to the DDR memory routing and the power sequencing of the 1.2 V core, 1.8 V/3.3 V I/O, and 1.8 V DDR rails. The SAMA5D2 reference design and the SAMA5D2 Xplained Ultra evaluation kit provide validated schematics and layout guidance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for sourcing and integration decisions.
直接替换替代料： ATSAMA5D21B-CUR ——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： ATSAMA5D21B-CUR （相同外形与封装尺寸） ——差异在于 Package, External Memory Support, Ethernet, Backup Mode Current, Core Architecture.
快速对比工具——选择替代料号进行并排对比：
ATSAMA5D21B-CU
✅ 直接替换✓ 有现货
$9.8 / 个
查看数据手册 →ATSAMA5D21B-CUR
✅ 直接替换✓ 有现货
$8.56 / 个
查看数据手册 →ATSAMA5D22B-CUR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$9.1 / 个
查看数据手册 →ATSAMA5D24B-CUR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.5 / 个
查看数据手册 →ATSAMA5D27B-CUR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$11.85 / 个
查看数据手册 →ATSAMA5D21B-CUR 最大额定值与电气特性
| Core Processor | ARM Cortex-A5 |
| Core Architecture | 32-bit ARMv7-A |
| Number of Cores | 1 |
| 最大时钟频率 | 500 MHz |
| Internal SRAM | 128 KB |
| L1 Cache | 32 KB instruction + 32 KB data |
| L2 Cache | 128 KB |
| External Memory Support | DDR2, DDR3L, LPDDR2, LPDDR3, QSPI, e.MMC |
| 封装 | 196-TFBGA (11x11 mm) |
| Ball Pitch | 0.8 mm |
| 工作温度 | -40C to +85C |
| Backup Mode Current | 5 uA |
| ADC Resolution | 12-bit |
| Audio Subsystem | Embedded (fractional PLL) |
| Security Features | Secure boot, TRNG, tamper detection |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
ATSAMA5D21B-CUR 196-tfbga (11x11 mm) 引脚配置指南
ATSAMA5D21B-CUR（196-tfbga (11x11 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： ATSAMA5D21B-CUR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATSAMA5D21B-CUR 适用于 6 应用s: Industrial HMI Panels, IoT Gateways, Point-of-Sale Terminals, Building Automation Controllers, Portable Medical Devices, Smart Vending and Retail Kiosks.
Industrial HMI Panels
The ATSAMA5D21B-CUR fits industrial human-machine interface panels because its 500 MHz Cortex-A5 core and 128 KB internal SRAM can drive a Linux framebuffer and touch controller without an external GPU. The 196-TFBGA 0.8 mm pitch package simplifies routing on the 4- to 6-layer boards typical of HMI products, and the integrated 12-bit ADC can sample resistive touch panels directly. Placed as the main application processor, it runs the GUI stack while the DDR3L controller feeds the frame buffer; the trade-off is that heavy 3D graphics must be offloaded or avoided, since the Cortex-A5 has no integrated GPU.
推荐
IoT Gateways
The ATSAMA5D21B-CUR is suited to IoT gateways because it combines 500 MHz application-class processing with 5 uA backup-mode current, allowing always-on network bridging with long battery-backed operation. The integrated DDR2/DDR3L/LPDDR2/LPDDR3 controller and QSPI/e.MMC flash support let designers build a complete gateway with minimal external memory components. In a typical topology the MPU runs the Linux network stack and protocol translation while a companion Cortex-M4 handles deterministic sensor polling; the trade-off is that the single Cortex-A5 core must share cycles between networking and application logic, so CPU headroom should be validated for high-throughput gateways.
推荐
Point-of-Sale Terminals
The ATSAMA5D21B-CUR suits point-of-sale terminals because its security block, including secure boot, TRNG, and tamper detection, supports the cryptographic requirements of payment processing. The 500 MHz Cortex-A5 core runs the payment application and display stack, while the embedded audio subsystem provides the beeper and voice prompts without an external codec. The 196-TFBGA package with 0.8 mm ball pitch keeps the main board manufacturable at low cost. The trade-off is that the device has no dedicated cryptographic accelerator for bulk AES, so designers should benchmark transaction throughput and consider offloading heavy crypto to a secure element.
推荐
Building Automation Controllers
The ATSAMA5D21B-CUR fits building automation controllers because its low-power architecture and 5 uA backup mode allow battery-backed real-time clocks and wake-on-event operation in HVAC and lighting nodes. The 500 MHz core runs the BACnet or Modbus stack while the 12-bit ADC samples analog sensors such as temperature and pressure transducers. The integrated DDR3L controller supports the memory footprint of a Linux-based controller. The trade-off is that the Cortex-A5 lacks hardware floating-point acceleration for heavy control loops, so deterministic PID loops are best delegated to a companion Cortex-M4 such as the ATSAM4S8CA-AU.
推荐
Portable Medical Devices
The ATSAMA5D21B-CUR is applicable to portable medical devices because its 5 uA backup current extends battery life in patient monitors and diagnostic instruments that sleep between measurements. The 500 MHz Cortex-A5 core processes sensor data and drives the display, while the 12-bit ADC digitizes physiological signals and the embedded audio subsystem provides alarm tones. The 196-TFBGA package supports compact board layouts. The trade-off is that medical designs require rigorous validation of the power sequencing and tamper-detection features, and the device is not AEC-Q100 or medical-grade qualified by default, so additional certification effort is required.
推荐
Smart Vending and Retail Kiosks
The ATSAMA5D21B-CUR fits smart vending and retail kiosks because it delivers 500 MHz application-class performance for touch UI, payment, and telemetry in a single low-cost MPU. The integrated DDR3L/LPDDR2 memory controller and QSPI/e.MMC flash support allow a compact Linux design, and the 0.8 mm ball pitch TFBGA keeps the main board affordable. In a typical kiosk the MPU runs the UI and cloud connectivity while a companion MCU manages motors and coin mechanisms. The trade-off is that the single Cortex-A5 core must handle UI rendering and network traffic concurrently, so memory bandwidth should be sized for the display resolution.
推荐
推荐产品汇总
工程参考数据： ATSAMA5D21B-CUR ——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 | ATSAMA5D21B-CU | ATSAMA5D22B-CUR | ATSAMA5D24B-CUR | ATSAMA5D27B-CUR |
|---|---|---|---|---|---|
| Package | 196-TFBGA (11x11) | 196-TFBGA (11x11) - same | 196-TFBGA (11x11) - same | 196-TFBGA (11x11) - same | 196-TFBGA (11x11) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Processor | ARM Cortex-A5 | ARM Cortex-A5 | ARM Cortex-A5 | ARM Cortex-A5 | ARM Cortex-A5 |
| Maximum Clock Frequency | 500 MHz | 500 MHz | 500 MHz | 500 MHz | 500 MHz |
| Packaging | Tape & Reel | Tray | Tape & Reel | Tape & Reel | Tape & Reel |
关键差异点
- Lowest-cost 500 MHz entry point in the SAMA5D2 family （对比 ATSAMA5D28B-CN)
- 5 uA backup mode current （对比 ATSAMA5D28B-CN)
- 0.8 mm ball pitch TFBGA （对比 ATSAMA5D28B-CN)
设计说明
The SAMA5D2 family requires sequenced power rails: the 1.2 V core, 1.8 V/3.3 V I/O, and 1.8 V DDR supply must come up in the order specified by the datasheet to avoid latch-up and excessive inrush. Use a dedicated PMIC or a sequenced LDO arrangement, and verify that the reset signal is held low until all rails are stable. Estimated: at 500 MHz with typical peripheral activity the core rail draws on the order of 100-200 mA, so size the 1.2 V regulator for at least 300 mA of headroom.
The 196-TFBGA uses a 0.8 mm ball pitch, which permits 4- to 6-layer boards with conventional design rules rather than the finer-pitch HDI stackups required by 0.5 mm or 0.65 mm BGAs. Route the DDR2/DDR3L/LPDDR2/LPDDR3 bus as length-matched groups with controlled 50 ohm single-ended impedance, keep the memory devices close to the MPU, and provide a solid ground reference plane under the entire memory interface. Follow the SAMA5D2 layout guidelines and the SAMA5D2 Xplained Ultra reference design for validated stackup and routing.
A frequent mistake is to omit the backup-domain decoupling and the 32.768 kHz crystal load capacitors, which prevents reliable wake from 5 uA backup mode. Another is to assume pin compatibility with other SAMA5D2 family members such as the ATSAMA5D28B-CN; although they share the family name, they are not pin-compatible and require a board redesign. Always confirm the exact ordering code suffix (-CUR vs -CU) because it changes only the packaging, not the silicon, but affects reflow and inventory handling.
合规信息
RoHS compliance is stated in the verified distributor data. REACH, lead-free, halogen-free, and conflict-minerals status were not present in the provided data and are marked unknown rather than assumed.