AT91SAM9G20B-CU - 400MHz ARM926 MPU, 217-LFBGA | Microchip
MPN： AT91SAM9G20B-CU ✓ 啟用中AT91SAM9G20B-CU 概覽
An ARM926EJ-S microprocessor is a 32-bit RISC CPU core featuring the ARMv5TEJ instruction set with Jazelle Java acceleration, MMU, and DSP extensions, designed for embedded applications requiring full operating-system support such as Linux and Windows Embedded Compact. In the broader system hierarchy, the AT91SAM9G20 sits below application processors and above microcontrollers (MCUs), bridging the gap between deterministic MCU-class peripherals and rich-OS-capable CPUs. The 217-LFBGA package is part of the fine-pitch BGA surface-mount family requiring reflow soldering and X-ray or AOI inspection.
Key features include an ARM926EJ-S core with 32 KB instruction cache and 32 KB data cache, 64 KB internal SRAM, 16 KB ROM containing the bootloader, and an external bus interface supporting DDR/LPDDR, NAND Flash, and SDRAM. Communication peripherals cover two USB 2.0 Full-Speed ports (host and device), a 10/100 Ethernet MAC with MII/RMII, an Image Sensor Interface (ISI), two SSC/SPI, four UART, two TWI (I2C), and a high-speed multimedia card interface (HSMCI). Operating voltage is 0.9-1.1 V core with 1.65-3.6 V I/O and memory.
Typical applications include industrial HMI panels, point-of-sale terminals, barcode scanners, building automation gateways, portable medical data terminals, and Linux-based IoT edge nodes. The combination of Ethernet, dual USB, image sensor input, and DDR controller enables a true single-chip system design without an external bus-master companion. Compared to microcontrollers in the same generation, the AT91SAM9G20 provides full MMU support and Linux BSP availability from Microchip, simplifying migration from MCU-class designs when memory protection and complex OS features are required.
直接替換替代品，適用於 AT91SAM9G20B-CU — 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： AT91SAM9G20B-CU （相同外形與佔位） — 差異在於 Core Architecture, Ethernet, MSL Level, Mounting Type, Package.
AT91SAM9G20B-CU-999
✅ 直接替換📋 參考替代品（不在目錄中）
AT91SAM9G20-CU
✅ 直接替換📋 參考替代品（不在目錄中）
AT91SAM9G20B-CFU
✅ 直接替換📋 參考替代品（不在目錄中）
AT91SAM9260B-CU
✅ 直接替換聯絡詢價
查看資料表 →AT91SAM9G20B-CU 最大額定值與電氣特性
| Core Architecture | ARM926EJ-S (ARMv5TEJ with Jazelle) |
| Core Frequency | 400 MHz |
| Bit Width | 32-bit |
| Cache | 32 KB instruction + 32 KB data |
| Internal SRAM | 64 KB |
| Internal ROM | 16 KB (bootloader) |
| 封裝 | 217-LFBGA (15x15 mm) |
| 安裝類型 | Surface Mount (BGA) |
| 工作溫度 | -40C to +85C (industrial) |
| Core Supply Voltage | 0.9 V to 1.1 V |
| I/O Supply Voltage | 1.65 V to 3.6 V |
| Memory Supply Voltage | 1.8 V / 2.5 V / 3.3 V |
| External Bus Interface | DDR/LPDDR, NAND Flash, SDRAM |
| USB | 2x USB 2.0 Full-Speed (Host + Device, on-chip transceiver) |
| Ethernet | 10/100 MAC (MII/RMII) |
| Image Sensor Interface | Yes (ISI) |
| UART / SPI / TWI | 4x UART, 2x SSC/SPI, 2x TWI (I2C) |
| HSMCI (SD/MMC) | Yes (High-Speed MultiMedia Card Interface) |
| RoHS 狀態 | Compliant |
| MSL 等級 | 3 (per JEDEC J-STD-020) |
AT91SAM9G20B-CU 217-lfbga (15x15 mm) 腳位配置指南
AT91SAM9G20B-CU（217-lfbga (15x15 mm) 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： AT91SAM9G20B-CU.
請參閱 資料表 以查看完整腳位配置。
典型應用
AT91SAM9G20B-CU 適用於 7 應用s: Industrial HMI / Operator Panels, Point-of-Sale Terminals, Industrial Barcode / 2D Imager, Building Automation Gateways, Portable Medical Data Terminal, IoT Edge / Linux Gateway, Connected Smart-Energy Meter.
Industrial HMI / Operator Panels
The AT91SAM9G20B-CU's 400 MHz ARM926 core and 64 KB internal SRAM give it the throughput to drive a 3.5 to 7 inch TFT LCD with capacitive touch at 60 fps using Linux + Qt or LVDS, while the 217-LFBGA package keeps the SoM footprint compact behind the display. The on-chip Image Sensor Interface (ISI) lets a co-located camera feed into the panel for machine-vision overlays, and the 10/100 Ethernet MAC plus dual USB host port enable integration with fieldbus gateways and barcode-scanner peripherals.
推薦
Point-of-Sale Terminals
Point-of-sale terminals need the AT91SAM9G20B-CU's Linux-capable MMU to run a graphical POS stack, plus its hardware crypto accelerators and dual USB host port for magnetic-stripe readers, NFC readers, and receipt printers. The 64 KB internal SRAM lets the boot ROM stage the bootloader in zero-wait-state memory before DDR is brought up, accelerating cold-boot time. Industrial -40C to +85C operation and the RoHS-compliant LFBGA package support long-life deployments in retail back-office and kitchen-display environments.
推薦
Industrial Barcode / 2D Imager
Handheld industrial barcode scanners benefit from the AT91SAM9G20B-CU's on-chip Image Sensor Interface that accepts raw Bayer data from a CMOS image sensor at up to 30 fps and hands it to the ARM926 core for decoding without an external DSP. The 400 MHz clock and 64 KB SRAM allow on-device decoding of DataMatrix and QR codes in real time, while USB host/device ports support both cradle charging and host-mode data upload. The wide 1.65-3.6 V I/O range simplifies integration with single-cell Li-ion or 3.3 V system rails.
推薦
Building Automation Gateways
Building-automation gateways use the AT91SAM9G20B-CU's 10/100 Ethernet MAC and dual USB host to bridge BACnet, Modbus, KNX, and Zigbee subnets into a unified IP backbone, with the 400 MHz ARM926 core running Linux + Node-RED or a custom MQTT broker. The 16 KB internal ROM bootloader supports secure firmware update via Ethernet for unattended remote sites, and the industrial -40C to +85C operating range handles basement mechanical rooms. The 217-LFBGA package keeps the gateway PCB under 60x60 mm for DIN-rail enclosures.
推薦
Portable Medical Data Terminal
Portable medical data terminals such as vital-sign monitors and electronic patient-chart tablets leverage the AT91SAM9G20B-CU's Linux-capable MMU for HIPAA-compliant encrypted storage, the on-chip USB device port for tethered docking-station sync, and the 10/100 Ethernet MAC for bedside network connection. The 217-LFBGA package with 0.8 mm pitch fits inside a handheld plastic enclosure with a 4.3 inch TFT. The 0.9-1.1 V core voltage and 1.65-3.6 V I/O enable direct connection to a Li-ion cell plus a power-management companion without level shifters.
推薦
IoT Edge / Linux Gateway
IoT edge gateways running lightweight Linux containers benefit from the AT91SAM9G20B-CU's mainline-kernel support, 64 KB internal SRAM for boot staging, and 10/100 Ethernet MAC for IP uplink. The dual USB 2.0 Full-Speed ports support cellular dongles and LoRa/Zigbee coordinators, while the four UARTs connect to RS-485 Modbus sensors. The 400 MHz ARM926 provides just enough throughput for MQTT+TLS encryption, and the industrial temperature range plus 217-LFBGA packaging deliver long-life operation in outdoor or factory-floor enclosures.
推薦
Connected Smart-Energy Meter
Single-phase smart-energy meters leverage the AT91SAM9G20B-CU's ARM926 core with MMU to run a Linux stack for metering firmware, plus its image sensor interface and USB host ports to support optional display and HAN (home-area network) connectivity. The 0.9-1.1 V core with 1.65-3.6 V I/O is well-matched to direct battery-backup architectures. The industrial -40C to +85C operating range and the long-life-cycle Microchip SAM9 platform make this part a strong fit for AMI (advanced metering infrastructure) deployments expected to run for 15+ years in the field.
推薦
推薦產品摘要
工程參考資料，適用於 AT91SAM9G20B-CU — 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 | AT91SAM9G20B-CU-999 | AT91SAM9G20-CU | AT91SAM9G20B-CFU | AT91SAM9260B-CU | AT91SAM9260B-QU |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 217-LFBGA (15x15) | 217-LFBGA (15x15) - same | 217-LFBGA (15x15) - same | 217-LFBGA (15x15) - same | 217-LFBGA (15x15) - same | 208-QFP - different |
| Core Clock | 400 MHz | 400 MHz | 266 MHz (-33%) | 400 MHz | 180-210 MHz (-50%) | 180-210 MHz |
| Core Architecture | ARM926EJ-S | ARM926EJ-S | ARM926EJ-S | ARM926EJ-S | ARM926EJ-S | ARM926EJ-S |
| Internal SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 96 KB (24 KB SRAM + 2x16 KB fast SRAM) | 96 KB |
| USB Ports | 2x USB 2.0 Full-Speed (Host + Device) | 2x USB 2.0 Full-Speed | 2x USB 2.0 Full-Speed | 2x USB 2.0 Full-Speed | 2x USB 2.0 Full-Speed + 1x USB Device | 2x USB 2.0 Full-Speed + 1x USB Device |
| Ethernet MAC | 10/100 (MII/RMII) | 10/100 (MII/RMII) | 10/100 (MII/RMII) | 10/100 (MII/RMII) | 10/100 (MII/RMII) | 10/100 (MII/RMII) |
| Image Sensor Interface (ISI) | Yes | Yes | Yes | Yes | No | No |
| Linux BSP Support | Mainline kernel + U-Boot | Mainline kernel + U-Boot | Mainline kernel + U-Boot | Mainline kernel + U-Boot | Mainline kernel + U-Boot | Mainline kernel + U-Boot |
| RoHS / Lead-Free | RoHS Compliant / Lead-Free | RoHS Compliant / Lead-Free | RoHS Compliant / Lead-Free | RoHS Compliant / Lead-Free | RoHS Compliant / Lead-Free | RoHS Compliant / Lead-Free |
| Unit Price (qty 1, USD, as of 2026-10-07) | $18.92 | $18.92 | $16.50 | $19.10 | $15.20 | $17.40 |
主要差異化特點
- Higher core clock at same package (對比AT91SAM9G20-CU)
- Image Sensor Interface (ISI) integration (對比AT91SAM9260B-CU)
- Single-chip system integration (對比AT91SAM9260B-CU)
設計說明
The 217-LFBGA package uses a 0.8 mm ball pitch, so PCB escape routing must use microvia (HDI) stack-up with at least a 1-2-1 via structure under the BGA. Allocate a 4-layer minimum stack-up with continuous ground plane beneath the BGA and route DDR signals on the top layer with matched lengths to within +/-25 mil. Follow the IPC-7351 BGA land-pattern guidelines for pad diameter and solder-mask definition to prevent solder-bridge defects during reflow.
Estimated: the AT91SAM9G20B-CU draws approximately 60-100 mA on the 0.9-1.1 V VDDCORE rail at 400 MHz with all peripherals enabled, so a switching DC-DC regulator with at least 250 mA headroom is recommended. The 1.65-3.6 V VDDIOM and VDDIOP rails can be powered from the same 3.3 V LDO that feeds DDR memory, simplifying power-tree design. Place a 10 uF + 100 nF decoupling pair within 5 mm of each VDDCORE/VDDIO ball group, with the ground via stitching placed inside the BGA shadow for lowest inductance.
The 217-LFBGA package has a thermal resistance (theta_JA) of approximately 25-30 C/W on a 4-layer JEDEC test board, so at full CPU+peripheral load the junction temperature rise is 10-15 C above ambient. For industrial -40C to +85C operation, ensure the worst-case ambient does not push junction beyond 105 C (typical derating target). Use a continuous copper flood under the BGA connected to the ground plane for spreading, and consider thermal vias to the inner copper layers for high-ambient deployments.
Do not confuse the AT91SAM9G20B-CU (400 MHz, 'B' revision, this part) with the older AT91SAM9G20-CU (266 MHz) - the markings differ only by the trailing 'B' and a 'B' suffix is essential for 400 MHz operation. Also, the SAM9G20 does not include an LCD controller (LCDC), so a TFT display must be driven by an external bridge IC or by the CPU bit-banging a parallel interface, which limits display size to about 4.3 inches at 60 fps. Finally, the boot ROM expects NAND or SPI-NOR boot - the SD-card boot path requires the AT91Bootstrap tool from Microchip.
DDR/LPDDR memory routing must follow the Atmel/Microchip DDR reference design with matched-length traces (tolerance +/-50 mil) and a 50-ohm controlled impedance on the top microstrip layer. The 32.768 kHz slow-clock crystal should be placed within 5 mm of the RTCK pins with a guard ring, and the main 12 MHz oscillator should be routed short with its load capacitors within 2 mm. The USB DP/DM traces require 90-ohm differential impedance and should not cross any ground-plane splits; use an explicit ground keep-out beneath the USB connector shield.
合規資訊
RoHS and REACH compliant per Microchip product page and distributor listings (Abacus Technologies DRC conflict-free). Not AEC-Q100 qualified - this is an industrial-grade part. Halogen-free status not explicitly listed in the provided data.
