SAM9RL64 Atmel Corporation, SAM9RL64 Datasheet - Page 73

• Manufacturer Part Number: SAM9RL64
• Manufacturer: Atmel Corporation

Specifications of SAM9RL64

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 240 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 118
• Ext Interrupts: 118
• Usb Transceiver: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 2
• Uart: 5
• Ssc: 2
• Sd / Emmc: 1
• Graphic Lcd: Yes
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 6
• Adc Resolution (bits): 10
• Adc Speed (ksps): 220
• Resistive Touch Screen: Yes
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 64
• 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
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

14. AT91SAM9R64/RL64 Boot Program
14.1
14.2
6289D–ATARM–3-Oct-11
Description
Flow Diagram
The Boot Program integrates different programs that manage download and/or upload into the
different memories of the product.
First, it initializes the Debug Unit serial port (DBGU) and the USB High Speed Device Port.
Then the SD Card Boot program is executed. It looks for a boot.bin file in the root directory of a
FAT12/16/32 formatted SD Card. If such a file is found, code is downloaded into the internal
SRAM. This is followed by a remap and a jump to the first address of the SRAM.
If the SD Card is not formatted or if boot.bin file is not found, NAND Flash Boot program is then
executed. The NAND Flash Boot program searches for a valid application in the NAND Flash
memory. If a valid application is found, this application is loaded into internal SRAM and exe-
cuted by branching at address 0x0000_0000 after remap. See
more information on Valid Image Detection.
If no valid ARM vector sequence is found, the DataFlash Boot program is then executed. It looks
for a sequence of seven valid ARM exception vectors in a DataFlash connected to the SPI. All
these vectors must be B-branch or LDR load register instructions except for the sixth vector.
This vector is used to store the size of the image to download.
If a valid sequence is found, code is downloaded into the internal SRAM. This is followed by a
remap and a jump to the first address of the SRAM.
If no valid ARM vector sequence is found, SAM-BA Boot is then executed. It waits for transac-
tions either on the USB device, or on the DBGU serial port.
The Boot Program implements the algorithm in
Figure
14-1.
AT91SAM9R64/RL64
“DataFlash Boot” on page 75
for
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