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Microchip Technology AT91SAM9G45C-CU
- Part No.:
- AT91SAM9G45C-CU
- Manufacturer:
- Microchip Technology
- Category:
- Microprocessors
- Package:
- 324-TFBGA
- Datasheet:
-
AT91SAM9G45C-CU.pdf
- Description:
- IC MPU SAM9G 400MHZ 324TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:420
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Product details
Overview
AT91SAM9G45C-CU from Microchip Technology (formerly Atmel) is an ARM926EJ-S-based embedded microprocessor unit (MPU) operating at 400 MHz, integrating DDR2/LPDDR memory controller, 10/100 Ethernet MAC, high-speed USB 2.0 host/device, LCD controller, image sensor interface, and 8-channel 10-bit ADC with touch-screen support. It targets industrial HMI, networked media terminals, and edge gateway applications requiring concurrent high-bandwidth peripherals.
For engineers reviewing the AT91SAM9G45C-CU datasheet, AT91SAM9G45C-CU pinout, AT91SAM9G45C-CU application, or AT91SAM9G45C-CU equivalent, key selection considerations include its 324-ball TFBGA package, dual PLL architecture (system + 480 MHz USB), 133 MHz multi-layer AHB bus matrix, 37 DMA channels, and independent 1.8V/3.3V I/O voltage domains eliminating external level shifters.
Technical Context
The AT91SAM9G45C-CU implements a 5-stage ARM926EJ-S core with 32 KB instruction and 32 KB data caches plus MMU, enabling Linux-capable real-time execution. Its bus architecture features a 12-layer AHB matrix supporting 11 concurrent masters-including ARM instruction/data, USB EHCI/OHCI, ISI, LCD, and Ethernet DMA-ensuring deterministic bandwidth allocation across high-throughput peripherals.
Peripherals are tightly coupled to dedicated DMA paths: the Peripheral DMA Controller (PDC) handles UART/SSC/AC97 transfers with next-pointer chaining, while the dual 8-channel DMA controllers manage memory-to-memory, peripheral-to-memory, and memory-to-peripheral operations with linked-list support and status write-back-critical for sustained video capture, audio streaming, and real-time control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM926EJ-S @ 400 MHz with 32 KB I-cache, 32 KB D-cache, and full MMU for Linux OS support |
| Memory Interface | DDR2/LPDDR controller (4-bank, 1.8 V I/O) + External Bus Interface supporting NAND Flash with ECC, SDRAM, CompactFlash |
| USB Support | One high-speed USB Device (480 Mbps) + two high-speed USB Host ports (EHCI/OHCI), each with on-chip UTMI transceivers |
| Display & Imaging | LCD controller supporting STN/TFT up to 1280×860 + ITU-R BT.601/656 image sensor interface with 12-bit parallel input |
| Analog Input | 8-channel 10-bit ADC with integrated 4-wire resistive touch-screen controller and dedicated analog supply (VDDANA = 3.3 V) |
| Power Management | Dual PLL (133 MHz system + 480 MHz USB), clock gating, battery-backed RTC, and 0.9–1.1 V core supply for sub-200 mW active power |
| I/O Voltage Flexibility | Five independent I/O banks: DDR2 (1.8 V), EBI (1.8 V or 3.3 V), peripherals (1.65–3.6 V), analog (3.3 V), backup (1.8–3.6 V) |
Pinout & Package
The AT91SAM9G45C-CU is housed in a 324-ball Thin Fine-Pitch Ball Grid Array (TFBGA) package with 0.8 mm ball pitch, optimized for compact PCB layout and low-cost manufacturing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A18, B1–B18, C1–C18, D1–D18, E1–E18, F1–F18, G1–G18, H1–H18, J1–J18, K1–K18, L1–L18, M1–M18, N1–N18, P1–P18, R1–R18, T1–T18, U1–U18, V1–V18 | Multi-function I/O bank (PIOA–PIOE), DDR2/EBI signals, peripheral interfaces | 160 programmable I/O lines multiplexed with up to two peripheral functions per pin; Schmitt-trigger inputs with configurable pull-ups |
| VDDCORE, GNDCORE | Core power and ground | 0.9–1.1 V core supply with dedicated low-noise ground plane essential for stable 400 MHz CPU operation |
| VDDIOM0, GNDIOM | DDR2 I/O power and ground | 1.8 V supply domain isolated from other I/O banks to meet DDR2 signal integrity requirements |
| VDDIOP0–VDDIOP2, GNDIOP | Peripheral I/O power and ground | Configurable 1.65–3.6 V range enables direct interfacing with legacy 3.3 V or modern 1.8 V logic without level shifters |
| VDDANA, GNDANA | Analog ADC power and ground | 3.3 V analog supply with separate ground minimizes noise coupling into 10-bit ADC and touch-screen measurements |
Key Features
| Feature | Design Value |
|---|---|
| ARM926EJ-S with Jazelle | Java bytecode acceleration enables efficient middleware and UI frameworks in resource-constrained embedded Linux systems |
| 64 KB internal SRAM as TCM | Single-cycle access at processor speed allows deterministic real-time interrupt handling and critical code execution |
| Independent I/O voltage domains | Eliminates external level shifters between DDR2, EBI, and peripheral subsystems-reducing BOM cost and board area |
| Integrated touch-screen ADC | Hardware-accelerated 4-wire resistive touch digitization with auto-calibration reduces CPU load and improves HMI responsiveness |
| USB dual-role capability | Single UTMI+ PHY shared between USB Device HS and Host Port B enables flexible connectivity modes via software configuration |
Applications
| Industrial Human-Machine Interface | Networked Media Terminal |
|---|---|
Use Scenario: Factory-floor operator panel with TFT LCD, touch overlay, Ethernet backhaul, and local SD card logging. IC Role / Device Role / Timing Role: Central MPU executing Linux-based Qt UI, driving display via LCDC, sampling touch via ADC, and streaming diagnostics over 10/100 Ethernet. Use Value: Integrated DDR2 controller and 133 MHz AHB matrix sustain simultaneous 800×480@60 Hz display refresh, touch polling, and TCP/IP stack processing without external memory bottlenecks. | Use Scenario: IP-connected digital signage player supporting HDMI output (via bridge IC), local video decode, and remote firmware updates. IC Role / Device Role / Timing Role: Application processor managing video decode acceleration (via external codec), rendering UI elements, and handling secure OTA updates over Ethernet or USB mass storage. Use Value: Dual high-speed USB host ports enable concurrent connection of USB Wi-Fi dongle and update USB stick, while NAND Flash ECC ensures robust boot integrity in unattended deployments. |
| Edge Gateway Controller | Imaging Edge Node |
Use Scenario: Smart building gateway aggregating Modbus RTU sensors, translating to MQTT over Ethernet, with local web UI. IC Role / Device Role / Timing Role: Real-time protocol translation engine using four USARTs (Modbus RS-485), Ethernet MAC, and AC'97 audio for voice alerts. Use Value: Four independent USARTs with ISO7816/IrDA/Manchester modes allow native integration of legacy industrial protocols without external UART expanders. | Use Scenario: Portable medical imaging device capturing VGA-resolution video from CMOS sensor, storing to SDIO, and displaying on integrated LCD. IC Role / Device Role / Timing Role: Image acquisition processor using ISI interface, buffering frames in DDR2, applying basic enhancement in ARM core, and rendering on LCDC. Use Value: ITU-R BT.656-compliant ISI interface with dedicated DMA path enables zero-CPU-overhead 30 fps video capture directly into DDR2 memory. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar embedded MPU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATSAMA5D36-CU | ARM Cortex-A5 @ 536 MHz, no built-in LCD controller, adds crypto engine and QSPI interface | Better performance and security for Linux gateways; lacks integrated display/touch support | Select when cryptographic acceleration or higher CPU throughput is required and display is handled externally |
| i.MX287 | ARM926EJ-S @ 454 MHz, integrated LCD, 10/100 Ethernet, but only one USB OTG port and no ISI interface | Strong HMI fit with similar display capabilities; limited imaging and dual-USB flexibility | Select for cost-sensitive HMI where single USB and absence of camera interface are acceptable |
Compared with ATSAMA5D36-CU and i.MX287, the AT91SAM9G45C-CU uniquely balances mature ARM9 performance, integrated LCD/touch, dual high-speed USB host, and ITU-R BT.656 imaging-making it optimal for cost-constrained, display-centric edge devices needing field-proven Linux support without external video glue logic.
Availability
AT91SAM9G45C-CU is available at Aetrix Electronics and suitable for industrial HMI, networked media terminals, and edge gateway controllers requiring stable component supply, long-term availability, and proven Linux BSP support.
Supply support for AT91SAM9G45C-CU 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 acquired Atmel in 2016 and maintains full support for the SAM9 product line, including Linux kernel drivers, Yocto BSPs, and long-term industrial temperature-grade availability.
The AT91SAM9G45C-CU belongs to the SAM9 family of ARM9-based MPUs designed specifically for cost-sensitive, Linux-capable embedded applications requiring rich peripheral integration-including display, imaging, connectivity, and real-time I/O-without external co-processors.
FAQ
What operating systems are officially supported on the AT91SAM9G45C-CU?
The AT91SAM9G45C-CU is fully supported by Linux (mainline kernel since v3.1+), Buildroot, Yocto Project, and Android (v4.x). Microchip provides a complete BSP including U-Boot bootloader, Linux kernel patches, device tree files, and graphics libraries optimized for the LCDC and touch controller. Real-time OSes like FreeRTOS and RTEMS are also ported but require third-party adaptation.
Does the AT91SAM9G45C-CU support booting from NAND Flash with hardware ECC?
Yes, the AT91SAM9G45C-CU includes a dedicated NAND Flash controller with on-the-fly hardware ECC capable of correcting up to 4-bit errors per 512-byte sector. Boot ROM supports direct NAND boot with ECC verification, and the Linux kernel includes MTD drivers compatible with this hardware ECC engine for reliable flash file systems like UBIFS.
Can the AT91SAM9G45C-CU drive a 1024×768 TFT display at 60 Hz?
Yes-the LCDC supports up to 1280×860 resolution at 60 Hz. Driving 1024×768@60 Hz requires configuring the LCDC's programmable pixel clock (LCDDOTCK), horizontal/vertical sync timing, and data enable (LCDDEN) registers. The 64 KB internal SRAM can be allocated as frame buffer for small displays, while larger buffers reside in DDR2 with DMA-assisted updates.
How many USB endpoints does the AT91SAM9G45C-CU support in device mode?
In USB Device High Speed mode, the AT91SAM9G45C-CU supports 1 control endpoint (EP0) plus up to 7 additional configurable endpoints (EP1–EP7), each supporting bulk, interrupt, or isochronous transfer types. Endpoint configuration is managed via the UDPHS register set, and Linux gadget drivers (e.g., g_mass_storage, g_webcam) fully utilize this capability.
Is the AT91SAM9G45C-CU pin-compatible with other SAM9 series MPUs?
No-the AT91SAM9G45C-CU uses a unique 324-ball TFBGA package with specific pin assignments for DDR2, EBI, and peripheral signals. While functionally similar to AT91SAM9G20 or AT91SAM9M10, it is not pin-compatible due to differences in memory bus width, USB PHY routing, and I/O voltage domain partitioning. PCB redesign is required for migration.
AT91SAM9G45C-CU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- 324-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:
- LPDDR, LPSDR, DDR2, SDR, SRAM
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- LCD, Touchscreen
- Ethernet:
- 10/100Mbps
- SATA:
- -
- USB:
- USB 2.0 (3)
- 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:
- 324-TFBGA (15x15)
- Additional Interfaces:
- AC97, EBI/EMI, I2C, ISI, MMC/SD/SDIO, SPI, SSC, UART/USART
AT91SAM9G45C-CU FAQ
1.How can I place an order for AT91SAM9G45C-CU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT91SAM9G45C-CU 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 AT91SAM9G45C-CU reliable?
The price and inventory of AT91SAM9G45C-CU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT91SAM9G45C-CU is usually 5 days.
3.What payment methods are accepted for AT91SAM9G45C-CU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT91SAM9G45C-CU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT91SAM9G45C-CU?
AT91SAM9G45C-CU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT91SAM9G45C-CU 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 AT91SAM9G45C-CU?
For technical support, including AT91SAM9G45C-CU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT91SAM9G45C-CU requirements.
6.How does Aetrix verify that AT91SAM9G45C-CU is sourced from the original manufacturer or authorized distributors?
All AT91SAM9G45C-CU 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 AT91SAM9G45C-CU meets industry standards.
7.What is the process for return or replacement of AT91SAM9G45C-CU?
All AT91SAM9G45C-CU units undergo pre-shipment inspection (PSI). If there is an issue with AT91SAM9G45C-CU, 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 AT91SAM9G45C-CU part is unused and in its original packaging.
Return procedure for AT91SAM9G45C-CU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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