AT91SAM9260B-CU-999 Atmel, AT91SAM9260B-CU-999 Datasheet - Page 84

• Manufacturer Part Number: AT91SAM9260B-CU-999
• Description: IC MCU ARM9 217LFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9260B-CU-999

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 180MHz
• Connectivity: EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: POR, WDT
• Number Of I /o: 96
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: ROM
• Ram Size: 24K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 217-LFBGA
• Processor Series: AT91SAMx
• Core: ARM926EJ-S
• Data Bus Width: 32 bit
• Data Ram Size: 8 KB
• Interface Type: 2-Wire, EBI, I2S, SPI, USART
• Maximum Clock Frequency: 180 MHz
• Number Of Programmable I/os: 96
• Number Of Timers: 6
• 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, AT91SAM9260-EK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 4 Channel
• For Use With: AT91SAM9260-EK - KIT EVAL FOR AT91SAM9260AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

13.4
After reset, the code in internal ROM is mapped at both addresses 0x0000_0000 and 0x0010_0000:
13.4.1
6221I–ATARM–17-Jul-09
100000
100004
100008
10000c
100010
100014
100018
10001c
DataFlash Boot
Valid Image Detection
ea000006
eafffffe
ea00002f
eafffffe
eafffffe
eafffffe
eafffffe
eafffffe
B
B
B
B
B
B
B
B
Figure 13-3. Remap Action after Download Completion
The DataFlash Boot program searches for a valid application in the SPI DataFlash memory. If a
valid application is found, this application is loaded into internal SRAM and executed by branch-
ing at address 0x0000_0000 after remap. This application may be the application code or a
second-level bootloader.
All the calls to functions are PC relative and do not use absolute addresses.
The DataFlash Boot software looks for a valid application by analyzing the first 28 bytes corre-
sponding to the ARM exception vectors. These bytes must implement ARM instructions for
either branch or load PC with PC relative addressing.
The sixth vector, at offset 0x14, contains the size of the image to download. The user must
replace this vector with his own vector (see
Figure 13-4. LDR Opcode
Figure 13-5. B Opcode
Unconditional instruction: 0xE for bits 31 to 28
31
31
1
1
1
1
0x20
0x04
_main
0x0c
0x10
0x14
0x18
0x1c
1
1
28 27
28 27
0
0
0x0000_0000
0x0030_0000
0
1
1
0
1
I
24 23
24 23
P
0
00000
000004
000008
00000c
000010
000014
000018
00001c
U
Internal
Internal
SRAM
ROM
0
W 1
20 19
ea000006
eafffffe
ea00002f
eafffffe
eafffffe
eafffffe
eafffffe
eafffffe
“Structure of ARM Vector 6” on page
Rn
REMAP
16 15
B
B
B
B
B
B
B
B
Offset (24 bits)
Rd
0x20
0x04
_main
0x0c
0x10
0x14
0x18
0x1c
Internal
Internal
SRAM
ROM
12 11
Addressing Mode
AT91SAM9260
0x0000_0000
0x0010_0000
85).
0
0
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