AT91SAM9G25-CU

The AT91SAM9G25-CU is a SMART 400MHz 32-bit Embedded Microprocessor Unit based on ARM926EJ-S processor. The SAM9G25 interface peripherals include a camera interface that supports direct connection to the ITU-R BT. 601/656 8-bit mode compliant sensors and up to 12-bit grayscale sensors. Communication peripherals include a soft modem supporting exclusively the conexant SmartDAA line driver, HS (480Mbps) USB host and device ports with on-chip transceivers, FS USB host, 10/100 Ethernet MAC, two HS SDCard/SDIO/MMC interfaces, USARTs, SPIs, I²S, multiple TWIs and 10-bit ADC. The multi-layer bus matrix is linked to 2 x 8 DMA channels as well as DMAs dedicated to the communication and interface peripherals, ensuring uninterrupted data transfers with minimal processor overhead. The External Bus Interface incorporates controllers for 4-bank and 8-bank DDR2/LPDDR, SDRAM/LPSDRAM, static memories, as well as specific circuitry for MLC/SLC NAND flash with integrated ECC up to 24 -bit.

• ARM926EJ-S ARM Thumb processor running at up to 400MHz at 1.0V ±10%
• 16kB Data cache, 16kB Instruction cache, memory management unit
• Power-on reset cells, reset controller, shutdown controller, periodic interval timer, WDT and RTC
• Boot mode select option, remap command
• Internal low power 32kHz RC and fast 12MHz RC oscillators
• Selectable 32768Hz low-power oscillator and 12MHz oscillator
• One PLL for the system and one PLL at 480MHz optimized for USB high speed
• Twelve 32-bit-layer AHB bus matrix for large bandwidth transfers
• Dual peripheral bridge with dedicated programmable clock for best performances
• Two dual port 8-channel DMA controllers (DMAC)
• Advanced interrupt controller (AIC) and debug unit (DBGU)
• Two programmable external clock signals
• Shutdown controller with four 32-bit battery backup registers
• Clock generator and power management controller
• Very slow clock operating mode, software programmable power optimization capabilities
• Four 32-bit parallel I/O controllers
• 105 Programmable I/O lines multiplexed with up to three peripheral I/Os
• Input change interrupt capability on each I/O line, optional Schmitt trigger input
• Individually programmable open-drain, pull-up and pull-down resistor, synchronous output
• ITU-R BT. 601/656 Image sensor interface (ISI)
• USB device high speed, USB host high speed and USB host full speed w/ dedicated on-chip transceiver
• One 10/100Mbps Ethernet MAC controller (EMAC)
• Two high speed memory card hosts
• Software modem device (SMD)
• Write protected registers

Applications

Automation & Process Control, Metering