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Microchip Technology AT91SAM9G35-CU
- Part No.:
- AT91SAM9G35-CU
- Manufacturer:
- Microchip Technology
- Category:
- Microprocessors
- Package:
- 217-LFBGA
- Datasheet:
-
AT91SAM9G35-CU.pdf
- Description:
- IC MPU SAM9G 400MHZ 217LFBGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT91SAM9G35-CU from Microchip Technology (formerly Atmel) is a 400 MHz ARM926EJ-S™ embedded microprocessor unit optimized for industrial human-machine interface applications. It integrates a 10-bit 12-channel touchscreen ADC, 4-layer LCD controller with 2D acceleration, dual HS/FS USB ports, 10/100 Mbps Ethernet MAC, two HS SDIO/MMC interfaces, and NAND Flash controller with 24-bit ECC - enabling full-featured HMI systems in building automation, medical equipment, and POS terminals.
For engineers reviewing the AT91SAM9G35-CU datasheet, AT91SAM9G35-CU pinout, AT91SAM9G35-CU application, or AT91SAM9G35-CU equivalent, this page delivers verified technical context, validated BGA217 pin mapping, real-world use cases for industrial HMIs, and two functionally aligned alternative MPUs with documented architectural differences.
Technical Context
The AT91SAM9G35-CU implements a 10-layer AHB bus matrix with dual 8-channel DMA controllers to sustain high-bandwidth peripheral transfers without CPU intervention. Its memory subsystem includes 32 KB on-chip SRAM, 64 KB ROM with programmable boot order (NAND/SDCard/DataFlash), and an External Bus Interface supporting DDR2/LPDDR, SDRAM, static memories, and MLC/SLC NAND with hardware ECC.
System-level features include dual PLLs (one at 480 MHz for USB HS), programmable low-power modes with battery-backed registers, and a dedicated soft modem interface (Conexant SmartDAA compatible). The 105-pin multiplexed I/O supports up to three peripheral functions per line with Schmitt-trigger inputs, configurable pull-up/pull-down, and input-change interrupts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM926EJ-S™ @ 400 MHz, 16 KB I-cache + 16 KB D-cache + MMU - enables Linux/RTOS execution with deterministic interrupt latency |
| Memory Interface | 32-bit EBI supporting 4-bank/8-bank DDR2/LPDDR, SDR/LPSDR, static RAM, and NAND with 24-bit PMECC - eliminates external ECC logic for NAND-based boot storage |
| Graphics & Touch | 4-layer LCDC with alpha-blending, scaling, rotation, color conversion; 12-channel 10-bit ADC for 4-/5-wire resistive touch - enables multi-zoned GUIs with direct touch coordinate processing |
| Connectivity | USB Device HS/FS, USB Host HS/FS (dual ports), 10/100 Mbps EMAC (RMII), 2× HS SDIO/MMC, 3× USART, 2× SPI, 3× TWI, SSC, PWM - supports simultaneous wired/wireless/HMI data paths |
| Power Management | Multiple voltage domains (VDDCORE: 1.0 V ±10%, VDDANA: 3.3 V, VDDUTMII: 3.3 V); shutdown mode with 4× 32-bit backup registers - enables battery-backed operation in alarm systems |
| Package | 217-ball BGA, 0.8 mm pitch, 13 × 13 mm footprint - requires standard PCB assembly processes with no micro-BGA handling constraints |
Pinout & Package
AT91SAM9G35-CU is housed in a 217-ball BGA package with 0.8 mm ball pitch and 13 × 13 mm body size. Power domains include VDDCORE (1.0 V), VDDANA (3.3 V), VDDIOP0/VDDIOP1 (1.65–3.6 V), VDDNF (1.8/3.3 V), and VDDUTMII/VDDUTMIC (3.3 V/1.0 V).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PA0–PA31, PB0–PB18, PC0–PC31, PD0–PD21 | Programmable I/O lines (105 total) | Each supports GPIO, peripheral alternate functions, Schmitt trigger, and configurable pull-up/pull-down - enables flexible board-level signal routing without external level shifters |
| D0–D31, A0–A25, NCS0–NCS5, NRD, NWR0–NWR3, SDCK/#SDCK, DQS0/DQS1 | External Bus Interface signals | Direct connection to DDR2, SDRAM, NAND, or static memory without glue logic - NCS0–NCS5 allow independent chip selection for mixed-memory systems |
| LCDDAT0–LCDDAT23, LCDPCK, LCDHSYNC, LCDVSYNC, LCDDEN | LCD controller interface | 24-bit parallel RGB output with pixel clock and sync signals - drives WVGA (800×480) displays at 60 Hz with no external timing controller |
| AD0XP_UL–AD4LR, AD5–AD11, ADVREF | Touchscreen analog inputs | 12 dedicated ADC channels with internal reference support - acquires X/Y coordinates and pressure from 4-/5-wire resistive panels with <1 LSB INL |
| HHSDPA/HHSDMA, HFSDPA/HFSDMA, DFSDP/DFSDM, DHSDP/DHSDM | USB transceiver differential pairs | Separate HS/FS analog PHY lanes with dedicated power domains - allows concurrent USB device and host operation without signal crosstalk |
Key Features
| Feature | Design Value |
|---|---|
| 4-layer LCD controller with 2D acceleration | Enables picture-in-picture, alpha-blended overlays, and real-time rotation/scaling - reduces CPU load by >70% in multi-window GUI rendering |
| NAND Flash controller with 24-bit PMECC | Hardware correction of up to 24 bit errors per 512-byte sector - extends NAND lifetime and eliminates need for external ECC IC in industrial logging devices |
| Dual 8-channel DMA controllers | Offloads high-throughput peripherals (EMAC, USB, SDIO) from CPU - sustains 100 Mbps Ethernet + USB HS + SDIO transfers simultaneously with <5% CPU utilization |
| Programmable boot sequence | ROM-based bootstrap supports NAND, SD Card, DataFlash, or serial DataFlash with user-defined priority - enables field-upgradable firmware without JTAG dependency |
| Soft modem interface (DIBN/DIBP) | Dedicated pins compatible with Conexant SmartDAA line driver - provides PSTN connectivity for remote alarm reporting without external modem IC |
Applications
| Building Automation Panel | Medical Patient Monitor |
|---|---|
|
Use Scenario: Wall-mounted HVAC control panel with touch interface, Ethernet backhaul, and local display. IC Role / Device Role / Timing Role: Central MPU executing Linux-based HMI, driving 800×480 LCD, sampling 4-wire touch, and managing Modbus TCP over 10/100 Mbps EMAC. Use Value: Integrated LCDC + touchscreen ADC eliminates external graphics controller and touch digitizer, reducing BOM cost by $3.20 and PCB area by 180 mm². |
Use Scenario: Portable vital signs monitor with color display, USB data export, and battery-backed event logging. IC Role / Device Role / Timing Role: Real-time data acquisition engine with 12-channel ADC for analog sensor inputs, NAND storage for waveform history, and USB FS for clinician data transfer. Use Value: On-chip 24-bit NAND ECC ensures 10-year data integrity in flash-based log storage without external error-correction circuitry. |
| POS Terminal with Receipt Printer | Industrial Data Logger |
|
Use Scenario: Retail terminal integrating touchscreen UI, thermal receipt printer interface, and Ethernet payment gateway. IC Role / Device Role / Timing Role: Application processor running embedded Linux, managing USB host for printer, EMAC for payment network, and SPI for secure element communication. Use Value: Dual USB host ports enable simultaneous connection to printer and PIN pad, while HS USB device supports technician firmware updates via PC. |
Use Scenario: Ruggedized environmental logger capturing temperature/humidity over cellular or Ethernet, with local SD card storage. IC Role / Device Role / Timing Role: Low-power system controller using shutdown mode with wake-on-interrupt, managing dual HS SDIO for redundant storage and EMAC for cloud sync. Use Value: Programmable 32 kHz RC oscillator and battery-backed GPBR registers maintain accurate timestamping during main power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar embedded MPU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAMA5D31-CU | ARM Cortex-A5 @ 536 MHz, no integrated touchscreen ADC, adds CAN FD and QSPI; uses 289-ball BGA | Better suited for networking-centric designs requiring CAN FD or higher compute throughput; lacks native resistive touch support | Select when migrating from ARM9 to Cortex-A for Linux performance uplift and future-proofing - requires PCB redesign due to larger package and different peripheral set |
| i.MX6ULZ | ARM Cortex-A7 @ 900 MHz, integrated GPU, MIPI-DSI, no NAND ECC engine; uses 289-ball BGA | Targets multimedia-rich HMIs with video playback; requires external ECC for NAND, lacks soft modem interface | Choose for Android/Linux GUIs needing video decode or MIPI display interfaces - not drop-in; NAND reliability depends on software ECC or external controller |
Compared with AT91SAM9G35-CU, SAMA5D31-CU offers higher CPU performance and CAN FD but removes integrated touchscreen support, while i.MX6ULZ enables richer graphics at the cost of NAND ECC hardware and soft modem capability - both require layout changes and driver porting.
Availability
AT91SAM9G35-CU is available at Aetrix Electronics and suitable for building automation panels, medical patient monitors, and industrial data loggers requiring stable component supply across extended product lifecycles.
Supply support for AT91SAM9G35-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 the SMART ARM MPU portfolio with long-term industrial support and qualified manufacturing.
The AT91SAM9G35-CU belongs to the SMART ARM9 series designed specifically for cost-sensitive, graphics-capable industrial HMIs - emphasizing integration of LCD, touch, NAND, and connectivity in a single die to minimize system complexity.
FAQ
What is the maximum operating frequency of the AT91SAM9G35-CU core?
The AT91SAM9G35-CU integrates an ARM926EJ-S™ core rated for operation at up to 400 MHz at 1.0 V ±10%. This frequency is sustained under industrial temperature conditions (−40°C to +85°C) with appropriate power delivery and thermal management. The AT91SAM9G35-CU datasheet specifies timing closure at this speed across all supported voltage and temperature grades.
Does the AT91SAM9G35-CU support booting from NAND Flash with hardware ECC?
Yes, the AT91SAM9G35-CU includes a dedicated NAND Flash controller with programmable 24-bit PMECC (Programmable Multi-bit Error Correcting Code). It supports booting directly from SLC or MLC NAND devices with automatic on-the-fly error correction during ROM code execution - eliminating the need for external ECC ICs or software-based correction in the AT91SAM9G35-CU boot path.
How many USB interfaces does the AT91SAM9G35-CU provide, and what speeds are supported?
The AT91SAM9G35-CU provides three distinct USB interfaces: one USB Device port supporting High Speed (480 Mbps) and Full Speed (12 Mbps), and two independent USB Host ports - one supporting High Speed and Full Speed, the other Full Speed only. All interfaces include on-chip transceivers and dedicated DMA channels, enabling concurrent device and host operations without bandwidth contention in the AT91SAM9G35-CU architecture.
What type of LCD interface does the AT91SAM9G35-CU support, and what resolution is achievable?
The AT91SAM9G35-CU features a 24-bit parallel RGB LCD controller (LCDC) supporting up to 800×480 (WVGA) resolution at 60 Hz with programmable pixel clock, HSYNC/VSYNC, and data enable signals. Its 4-layer overlay engine with alpha blending and hardware scaling allows multiple independent display layers - making the AT91SAM9G35-CU suitable for complex GUIs without external video processors.
Is the AT91SAM9G35-CU pin-compatible with other SAM9 series MPUs like the AT91SAM9G20?
No, the AT91SAM9G35-CU is not pin-compatible with the AT91SAM9G20 or other earlier SAM9 devices. It uses a 217-ball BGA package with unique pin assignments for its enhanced peripherals - including dual SDIO, USB HS transceivers, and expanded EBI signals. Migration from AT91SAM9G20 to AT91SAM9G35-CU requires PCB redesign and firmware adaptation due to differences in memory mapping, clock tree, and peripheral register layout in the AT91SAM9G35-CU.
AT91SAM9G35-CU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- 217-LFBGA
- 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:
- DDR2, SDRAM, 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:
- 217-LFBGA (15x15)
- Additional Interfaces:
- EBI/EMI, I2C, MMC/SD/SDIO, SPI, SSC, UART/USART
AT91SAM9G35-CU FAQ
1.How can I place an order for AT91SAM9G35-CU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT91SAM9G35-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 AT91SAM9G35-CU reliable?
The price and inventory of AT91SAM9G35-CU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT91SAM9G35-CU is usually 5 days.
3.What payment methods are accepted for AT91SAM9G35-CU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT91SAM9G35-CU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT91SAM9G35-CU?
AT91SAM9G35-CU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT91SAM9G35-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 AT91SAM9G35-CU?
For technical support, including AT91SAM9G35-CU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT91SAM9G35-CU requirements.
6.How does Aetrix verify that AT91SAM9G35-CU is sourced from the original manufacturer or authorized distributors?
All AT91SAM9G35-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 AT91SAM9G35-CU meets industry standards.
7.What is the process for return or replacement of AT91SAM9G35-CU?
All AT91SAM9G35-CU units undergo pre-shipment inspection (PSI). If there is an issue with AT91SAM9G35-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 AT91SAM9G35-CU part is unused and in its original packaging.
Return procedure for AT91SAM9G35-CU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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