AT91SAM9R64-CU-999 Atmel, AT91SAM9R64-CU-999 Datasheet - Page 73

• Manufacturer Part Number: AT91SAM9R64-CU-999
• Description: IC MCU ARM9 64K SRAM 144LFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9R64-CU-999

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 240MHz
• Connectivity: EBI/EMI, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: AC'97, POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: ROM
• Ram Size: 72K x 8
• Voltage - Supply (vcc/vdd): 1.08 V ~ 1.32 V
• Data Converters: A/D 3x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LFBGA
• Processor Series: AT91SAMx
• Core: ARM926EJ-S
• Data Bus Width: 32 bit
• Data Ram Size: 64 KB
• Interface Type: SPI, TWI, UART
• Maximum Clock Frequency: 240 MHz
• Number Of Programmable I/os: 118
• Operating Supply Voltage: 1.65 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: AT91SAM-ICE, AT91-ISP, AT91SAM9RL-EK
• Minimum Operating Temperature: - 40 C
• For Use With: AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

14. AT91SAM9R64/RL64 Boot Program
14.1
14.2
6289C–ATARM–28-May-09
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
AT91SAM9R64/RL64 Preliminary
Figure
14-1.
“DataFlash Boot” on page 75
for
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