AT91SAM9X25数据手册

Features

• Core

– ARM926EJ-S™ ARM

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Processor running at up to 400 MHz @ 1.0V +/- 10%

– 16 Kbytes Data Cache, 16 Kbytes Instruction Cache, Memory Management Unit

• Memories

– One 64-Kbyte internal ROM embedding bootstrap routine: Boot on NAND Flash,

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• System running at up to 133 MHz

Timer, Watchdog Timer and Real Time Clock

– Boot Mode Select Option, Remap Command

– Twelve 32-bit-layer AHB Bus Matrix for large Bandwidth transfers

– Dual Peripheral Bridge with dedicated programmable clock for best performance

Capabilities

• Peripherals

– USB Device High Speed, USB Host High Speed and USB Host Full Speed with

– Two 10/100 Mbps Ethernet MAC Controllers

– Two High Speed Memory Card Hosts

– Two CAN Controllers

– Two Three-channel 32-bit Timer/Counters

• I/O

– 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

• Package

– 217-ball BGA, pitch 0.8 mm

two IEEE Std 802.3-compatible 10/100Mbps Ethernet MACs. Additional communication inter-

faces include a soft modem supporting exclusively the Conexant SmartDAA line driver, HS USB

Device and Host, FS USB Host, two HS SDCard/SDIO/MMC interfaces, USARTs, SPIs, I2S,

TWIs and 10-bit ADC.

To ensure uninterrupted data transfer with minimum processor overhead, the SAM9X25 offers a

10-layer bus matrix coupled with 2 x 8 central DMA channels and dedicated DMAs for the high-

3. Signal Description

Table 3-1 gives details on the signal names classified by peripheral.

XOUT32 Slow Clock Oscillator Output Output

VBG Bias Voltage Reference for USB Analog

NTRST Test Reset Signal Input

BMS Boot Mode Select Input

DRXD Debug Receive Data Input

DTXD Debug Transmit Data Output

IRQ External Interrupt Input Input

PIO Controller - PIOA - PIOB - PIOC - PIOD

Static Memory Controller - SMC

NCS0-NCS5 Chip Select Lines Output Low

NRD Read Signal Output Low

NAND Flash Support

NFD0-NFD16 NAND Flash I/O I/O

SDCS DDR2/SDRAM Controller Chip Select Output Low

BA[0..2] Bank Select Output Low

RAS-CAS Row and Column Signal Output Low

MCI0_CK, MCI1_CK Multimedia Card Clock I/O