AT91SAM9261-CJ-999 Atmel, AT91SAM9261-CJ-999 Datasheet - Page 85

• Manufacturer Part Number: AT91SAM9261-CJ-999
• Description: IC MCU ARM9 ULTRA LP 217LFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9261-CJ-999

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 190MHz
• Connectivity: EBI/EMI, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: DMA, LCD, POR, PWM, WDT
• Number Of I /o: 96
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: ROM
• Ram Size: 192K x 8
• Voltage - Supply (vcc/vdd): 1.08 V ~ 1.32 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 217-LFBGA
• For Use With: AT91SAM9261-EK - KIT EVAL FOR AT91SAM926EJ-SAT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

Figure 13-5. Structure of the ARM Vector 6
13.4.2.1
13.5
6062M–ATARM–23-Mar-09
SerialFlash boot
Example
31
An example of valid vectors follows:
The size of the image to load into SRAM is contained in the location of the sixth ARM vector.
Thus the user must replace this vector by the correct size of his application.
The Serial flash boot looks for a valid application in the SPI SerialFlash memory.
SPI0 is configured in mater mode to generate a SPCK at 8MHz. Serial Flash shall be connected
to NPCS0.
The SerialFlash boot reads the serial flash status register (Instruction code 0x05). The serial
flash is considered as ready if bit 0 of the returned status register is cleared.
If no serial flash is connected or if it does not answer, SerialFlash boots exits after a 1000
attempts.
If the serial flash is ready, SerialFlash boot reads the first 8 words into SRAM (Instruction code
“Continous read array” 0x0b) and checks if it corresponds to valid exception vectors according to
the Valid Image dtection algorithm.
If a valid application is found, this application is loaded into internal SRAM and executed by
branching at address 0x0000_0000 after remap. This application may be the application code or
a second-level bootloader.
00
04
08
0c
10
14
18
ea000006
eafffffe
ea00002f
eafffffe
eafffffe
00001234
eafffffe
Size of the code to download in bytes
B
B
B
B
B
B
B
0x20
0x04
_main
0x0c
0x10
0x14
0x18
<- Code size = 4660 bytes
AT91SAM9261 Preliminary
0
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