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Microchip Technology AT91SAM9G20B-CFU
- Part No.:
- AT91SAM9G20B-CFU
- Manufacturer:
- Microchip Technology
- Category:
- Microprocessors
- Package:
- 247-TFBGA
- Datasheet:
-
AT91SAM9G20B-CFU.pdf
- Description:
- IC MPU SAM9G 400MHZ 247TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:240
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Product details
Overview
AT91SAM9G20B-CFU from Microchip Technology is a 32-bit ARM926EJ-S-based microprocessor unit integrating 400 MHz CPU, 64 KB ROM, dual 16 KB SRAM, Ethernet MAC 10/100, USB Device + dual-port Host, ISI image sensor interface, and EBI supporting SDRAM/NAND/CompactFlash. It targets industrial HMI, networked embedded gateways, and vision-enabled edge devices requiring deterministic real-time I/O and multi-protocol connectivity.
For engineers reviewing the AT91SAM9G20B-CFU datasheet, AT91SAM9G20B-CFU pinout, AT91SAM9G20B-CFU application, or AT91SAM9G20B-CFU equivalent, key selection criteria include its 217-ball LFBGA package, 400 MHz Arm926EJ-S core with MMU, integrated Ethernet and dual USB host capability, and support for high-sensitivity image capture via ITU-R BT.656-compatible ISI.
Technical Context
The AT91SAM9G20B-CFU implements a six-layer AHB matrix enabling concurrent access by up to six masters-including CPU, DMA, USB, EMAC, and peripherals-maximizing internal bandwidth. Its memory subsystem includes 32 KB instruction and data caches, write buffer, and MMU for full virtual memory management in Linux-capable systems.
Peripherals are organized into APB and AHB domains: the Ethernet MAC supports MII/RMII with dedicated 128-byte FIFOs and DMA channels; USB Device uses on-chip transceiver and 2.432 KB DPRAM; dual-port USB Host supports single/dual transceivers with integrated FIFOs; and the Image Sensor Interface provides 12-bit parallel input, SAV/EAV sync, preview scaler, and YCbCr format processing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm926EJ-S at 400 MHz - enables Linux 2.6+ execution with Java acceleration and DSP extensions. |
| Memory | 64 KB ROM (boot code), dual 16 KB SRAM (single-cycle access) - supports fast boot and real-time scratchpad usage. |
| External Bus | EBI with SDRAM, NAND Flash (ECC), CompactFlash - enables direct connection to high-density storage and DRAM without external logic. |
| Ethernet | 10/100 Base-T MAC with MII/RMII, 128-byte TX/RX FIFOs, dedicated DMA - reduces host CPU load for network packet handling. |
| USB | Full-Speed Device (12 Mbps) + dual-port Host (12 Mbps) with on-chip transceivers - eliminates need for external PHYs in cost-sensitive designs. |
| Image Interface | ITU-R BT.656-compliant ISI with 12-bit data path, SAV/EAV sync, preview scaler - enables direct connection to CMOS image sensors in surveillance or machine vision. |
| Package | 217-ball LFBGA (15 × 15 mm, 0.8 mm pitch) - standard footprint compatible with AT91SAM9260 but with enhanced speed and power supply pin mapping. |
Pinout & Package
AT91SAM9G20B-CFU is packaged in a Green-compliant 217-ball Low-Profile Fine-Pitch Ball Grid Array (LFBGA), 15 mm × 15 mm × 1.4 mm, 0.8 mm ball pitch. This package supports high I/O density and thermal performance for industrial applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A2 | NBS0/A0 | Byte mask / address line 0 - used for NAND/SDRAM byte selection or low-order addressing. |
| D9 | VDDCORE | Core power supply (0.9–1.1 V) - must ramp before I/O supplies to ensure proper reset sequencing. |
| J14 | TDO | JTAG test data output - essential for boundary scan and debug communication during development and production test. |
| P17 | PB5 | Programmable I/O line (Port B, bit 5) - Schmitt-trigger input with programmable pull-up, usable for GPIO or peripheral multiplexing. |
| R4 | VDDANA | Analog power supply (3.0–3.6 V) - isolated rail for ADC reference stability and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| ARM926EJ-S with MMU | Enables full Linux OS deployment with memory protection, process isolation, and virtual memory management. |
| Dual USB Host + Device | Supports simultaneous USB peripheral attachment (e.g., keyboard/mouse) and device-mode operation (e.g., CDC ACM) without external hub or switch. |
| Integrated ISI with scaler | Reduces FPGA or external processor overhead in camera modules by performing real-time preview scaling and YCbCr formatting. |
| EBI with NAND ECC engine | Allows direct interfacing to SLC NAND flash with hardware error correction, eliminating need for external ECC controller in boot media. |
| 6-layer AHB matrix | Prevents bus contention between CPU, DMA, EMAC, and USB - ensures deterministic latency for time-critical peripherals like ISI or ADC. |
Applications
| Industrial HMI Terminal | Networked Embedded Gateway |
|---|---|
Use Scenario: Touchscreen-based control panel in factory automation with Ethernet backhaul and local USB peripheral support. IC Role / Device Role / Timing Role: Main application processor executing Linux UI stack, managing display framebuffer, and coordinating real-time I/O via PIO and timer counters. Use Value: Integrated Ethernet MAC and dual USB ports eliminate external PHY/hub ICs; 400 MHz core sustains responsive GUI rendering under multitasking load. | Use Scenario: Protocol-conversion gateway connecting Modbus RTU field devices to cloud via Ethernet/WiFi bridge. IC Role / Device Role / Timing Role: Central protocol translator running embedded Linux, hosting serial-to-TCP daemon, and managing secure firmware updates over HTTP/HTTPS. Use Value: MMU enables process sandboxing for security; EBI supports large NOR/NAND for dual-image OTA update storage; USB Device mode allows local configuration via PC. |
| Smart Surveillance Camera | Medical Imaging Edge Node |
Use Scenario: IP camera with MJPEG encoding, motion detection, and local SD card storage. IC Role / Device Role / Timing Role: Vision processor capturing raw sensor data via ISI, compressing frames using software codecs, and streaming over Ethernet. Use Value: BT.656-aligned ISI interface directly accepts CMOS sensor output; 128-byte EMAC FIFOs prevent packet loss during burst transmission. | Use Scenario: Portable ultrasound or endoscope imaging module requiring low-latency sensor interface and DICOM export. IC Role / Device Role / Timing Role: Real-time image acquisition controller synchronizing sensor clock (ISI_MCK), frame capture (ISI_HSYNC/VSYNC), and ADC sampling. Use Value: Programmable ISI preview scaler reduces host CPU load for real-time display; VDDANA rail ensures ADC SNR > 60 dB for diagnostic-grade signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT91SAM9260-CU | Same peripheral set but 210 MHz max CPU speed; lacks EBI NAND ECC engine; identical 217-ball LFBGA pinout except power supply pin assignments. | Lower-performance legacy design suitable for cost-sensitive, non-vision applications where 400 MHz and NAND ECC are unnecessary. | Select when migrating from SAM9260 and only incremental speed/ECC upgrades are needed - no PCB change required for power routing review. |
| SAMA5D31A-CU | ARM Cortex-A5 core at 536 MHz; adds GPU, LVDS, PCIe, and advanced security; incompatible pinout and higher power; requires new layout and BSP migration. | Next-generation replacement for applications needing graphics acceleration, secure boot, or high-speed interconnect beyond USB/Ethernet. | Choose for new designs requiring future-proof scalability - not a drop-in replacement; full hardware and software redesign required. |
Compared with AT91SAM9260-CU, AT91SAM9G20B-CFU delivers 90% higher CPU throughput and hardware NAND ECC for robust boot media, while retaining pin compatibility for streamlined upgrade paths; versus SAMA5D31A-CU, it offers proven industrial longevity and lower BOM cost but lacks Cortex-A-class features and security extensions.
Availability
AT91SAM9G20B-CFU is available at Aetrix Electronics and suitable for industrial HMI terminals, networked embedded gateways, smart surveillance cameras, medical imaging edge nodes, and protocol-conversion bridges requiring stable component supply across extended product lifecycles.
Supply support for AT91SAM9G20B-CFU includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog, FPGA, and timing solutions, serving industrial, automotive, communications, and consumer markets with high-reliability silicon and long-term support.
The AT91SAM9G20B-CFU belongs to Microchip's SAM9 ARM9-based microprocessor family, designed specifically for Linux-capable embedded systems requiring rich peripheral integration, deterministic real-time I/O, and industrial-grade longevity.
FAQ
What is the maximum operating frequency of the AT91SAM9G20B-CFU CPU core?
The AT91SAM9G20B-CFU integrates an Arm926EJ-S processor core rated for a maximum operating frequency of 400 MHz. This speed is achieved under specified voltage (VDDCORE = 1.0 V ±10%) and temperature conditions per the DS60001516A datasheet. The core includes 32 KB instruction and 32 KB data caches, write buffer, and MMU to sustain this performance in Linux-based applications.
Does the AT91SAM9G20B-CFU support NAND Flash with hardware ECC?
Yes, the AT91SAM9G20B-CFU includes an integrated ECC engine within its External Bus Interface (EBI) that supports SLC NAND Flash with hardware error correction. It generates and verifies Hamming codes for up to 1-bit correction per 256-byte sector, enabling reliable boot and data storage without external ECC logic. This feature is confirmed in Section 3.3.2 of the DS60001516A datasheet.
What package type is used for the AT91SAM9G20B-CFU?
The AT91SAM9G20B-CFU is supplied in a 217-ball Low-Profile Fine-Pitch Ball Grid Array (LFBGA) package measuring 15 mm × 15 mm × 1.4 mm with 0.8 mm ball pitch. This Green-compliant package is documented in Section 3.1 and Figure 3-1 of DS60001516A and is pin-compatible with the AT91SAM9260-CU, though power supply pin assignments differ.
Can the AT91SAM9G20B-CFU operate with both 1.8 V and 3.3 V external memory interfaces?
Yes, the AT91SAM9G20B-CFU's VDDIOM supply supports two selectable voltage ranges: 1.65–1.95 V (nominal 1.8 V) and 3.0–3.6 V (nominal 3.3 V). This allows direct interfacing with either 1.8 V SDRAM or 3.3 V NOR/NAND memories. The selection is configured via the VDDIOMSEL bit in the Matrix User Interface registers, and must be programmed before exiting Slow Clock mode.
What is the function of the Image Sensor Interface (ISI) in the AT91SAM9G20B-CFU?
The Image Sensor Interface (ISI) in the AT91SAM9G20B-CFU provides a parallel 12-bit input path compliant with ITU-R BT.656 and BT.601 standards. It supports SAV/EAV synchronization, programmable frame capture rate, preview path with scaler, and YCbCr format conversion - enabling direct connection to CMOS image sensors in vision applications without external video processors.
AT91SAM9G20B-CFU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- 247-TFBGA
- Series:
- SAM9G
- Packaging:
- Tray
- Product Status:
- Active
- Core Processor:
- ARM926EJ-S
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 400MHz
- Co-Processors/DSP:
- -
- RAM Controllers:
- SDRAM, SRAM
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- 10/100Mbps
- SATA:
- -
- USB:
- USB 2.0 (2)
- Voltage - I/O:
- 1.8V, 3.3V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Security Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 247-TFBGA (10x10)
- Additional Interfaces:
- EBI/EMI, I2C, MMC/SD/SDIO, SPI, SSC, UART/USART
AT91SAM9G20B-CFU FAQ
1.How can I place an order for AT91SAM9G20B-CFU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT91SAM9G20B-CFU on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT91SAM9G20B-CFU reliable?
The price and inventory of AT91SAM9G20B-CFU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT91SAM9G20B-CFU is usually 5 days.
3.What payment methods are accepted for AT91SAM9G20B-CFU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT91SAM9G20B-CFU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT91SAM9G20B-CFU?
AT91SAM9G20B-CFU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT91SAM9G20B-CFU order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT91SAM9G20B-CFU?
For technical support, including AT91SAM9G20B-CFU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT91SAM9G20B-CFU requirements.
6.How does Aetrix verify that AT91SAM9G20B-CFU is sourced from the original manufacturer or authorized distributors?
All AT91SAM9G20B-CFU products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT91SAM9G20B-CFU meets industry standards.
7.What is the process for return or replacement of AT91SAM9G20B-CFU?
All AT91SAM9G20B-CFU units undergo pre-shipment inspection (PSI). If there is an issue with AT91SAM9G20B-CFU, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT91SAM9G20B-CFU part is unused and in its original packaging.
Return procedure for AT91SAM9G20B-CFU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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