AT91SAM9261-CJ-999 Atmel, AT91SAM9261-CJ-999 Datasheet - Page 88

• 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: -

13.7.1
13.8
13.9
13.10 SAM-BA Boot
6062M–ATARM–23-Mar-09
SD Card Boot
EEPROM Boot
Supported NANDFlash Devices
If a valid application is found, this application is loaded into internal SRAM and executed by
branching at address 0x0000_0000 after remap. See
more information on Valid Image Detection.
Any 8 or 16-bits NANDFlash Devices.
The SD Card Boot program searches for a valid application in the SD Card memory.
It looks for a boot.bin file in the root directory of a FAT12/16/32 formatted SD Card. If a valid file
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.
The EEPROM Boot program searches for a valid application in an EEPROM connected to the
TWI address: 0x0050_0000.
If a valid application is found, this application is loaded into internal SRAM and executed by
branching at address 0x0000_0000 after remap. See
more information on Valid Image Detection.
If no valid DataFlash device has been found during the DataFlash boot sequence, the SAM-BA
boot program is performed.
The SAM-BA boot principle is to:
Table 13-2.
Command
O
o
H
h
W
w
S
R
G
V
• Write commands: Write a byte (O), a halfword (H) or a word (W) to the target.
– Wait for USB Device enumeration.
– In parallel, wait for character(s) received on the DBGU
– Once the communication interface is identified, the application runs in an infinite
loop waiting for different commands as in
Commands Available through the SAM-BA Boot
Action
write a byte
read a byte
write a half word
read a half word
write a word
read a word
send a file
receive a file
go
display version
Argument(s)
Address, Value#
Address,#
Address, Value#
Address,#
Address, Value#
Address,#
Address,#
Address, NbOfBytes#
Address#
No argument
AT91SAM9261 Preliminary
Table
“Valid Image Detection” on page 84
“Valid Image Detection” on page 84
13-2.
Example
O200001,CA#
o200001,#
H200002,CAFE#
h200002,#
W200000,CAFEDECA#
w200000,#
S200000,#
R200000,1234#
G200200#
V#
for
for
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