AT91SAM9R64-CU-999 Atmel, AT91SAM9R64-CU-999 Datasheet - Page 75

• 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

Figure 14-2. Remap Action after Download Completion
14.4
After reset, the code in internal ROM is mapped at both addresses 0x0000_0000 and 0x0040_0000:
14.4.1
6289C–ATARM–28-May-09
400000
400004
400008
40000c
400010
400014
400018
DataFlash Boot
Valid Image Detection
ea000006
eafffffe
ea00002f
eafffffe
eafffffe
eafffffe
eafffffe
B
B
B
B
B
B
B
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
0x0000_0000
0x0030_0000
9. Jump to SD Card Boot sequence. If SD Card Boot succeeds, perform a remap and
10. Jump to NAND Flash Boot sequence. If NAND Flash Boot succeeds, perform a remap
11. Jump to DataFlash Boot sequence through NPCS0. If DataFlash Boot succeeds, per-
12. Activation of the Instruction Cache
13. Jump to SAM-BA Boot sequence
14. Disable the WatchDog
15. Initialization of the USB Device Port
jump to 0x0.
and jump to 0x0.
form a remap and jump to 0x0.
0x20
0x04
_main
0x0c
0x10
0x14
0x18
Internal
Internal
SRAM
ROM
REMAP
00ea000006B0x20
04eafffffeB0x04
08ea00002fB_main
0ceafffffeB0x0c
10eafffffeB0x10
14eafffffeB0x14
18eafffffeB0x18
AT91SAM9R64/RL64 Preliminary
“Structure of ARM Vector 6” on page
Internal
Internal
SRAM
ROM
0x0000_0000
0x0010_0000
76).
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