SAM9261 Atmel Corporation, SAM9261 Datasheet - Page 86

• Manufacturer Part Number: SAM9261
• Manufacturer: Atmel Corporation

Specifications of SAM9261

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 240 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 96
• Ext Interrupts: 96
• Usb Transceiver: 3
• Usb Speed: Full Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 1
• Uart: 4
• Ssc: 3
• Sd / Emmc: 1
• Graphic Lcd: Yes
• Video Decoder: No
• Camera Interface: No
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 160
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.08 to 1.32
• Fpu: No
• Mpu / Mmu: No/Yes
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

13.6
6062N–ATARM–3-Oct-11
DataFlash Boot Sequence
Figure 13-6. SerialFlash Download
The Dataflash boot looks for a valid application in the SPI DataFlash memory.
SPI0 is configured in mater mode to generate a SPCK at 8MHz. Serial Flash shall be connected
to NPCS0.
The DataFlash boot reads the dataflash flash status register (Instruction code 0xD7). The data
flash is considered as ready if bit 7 of the returned status register is set.
If no dataflash is connected or if it does not answer, DataFlash boots exits after a 1000 attempts.
Read the SerialFlash into the internal SRAM.
Restore the reset value for the peripherals.
Set the PC to 0 and perform the REMAP
to jump to the downloaded application
Read the first 8 instructions (0x0b).
(code size to read in vector 6)
Send status command (0x05)
Decode the sixth ARM vector
(except vector 6) are LDR
or Branch instruction
Is status OK ?
8 vectors
Start
End
Yes
Yes
No
No
Jump to next boot
solution
AT91SAM9261
86