at91sam9260-cj ATMEL Corporation, at91sam9260-cj Datasheet - Page 83

• Manufacturer Part Number: at91sam9260-cj
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

13.5
13.5.1
13.6
6221G–ATARM–31-Jan-08
NAND Flash Boot
SAM-BA
Supported NAND Flash Devices
®
Boot
The NAND Flash Boot program searches for a valid application in the NAND Flash memory.
If no NAND Flash is found, the Real-time Timer is used to generate a 1 second typical timeout.
Table 13-6.
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 executed by branch-
ing at address 0x0000_0000 after remap. See
on Valid Image Detection.
Note:
Any 8 or 16-bits NAND Flash Devices from 1 Mbit to 16 Gbit density.
Table 13-7.
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:
RC Value (kHz)
Timeout
Manufacturer
TOSHIBA
SAMSUNG
FUJITSU
NATIONAL Semiconductor
RENESAS
STMicroelectronics
MICRON
– Check if USB Device enumeration has occurred.
– Check if the AutoBaudrate sequence has succeeded (see
– Check if characters have been received on the DBGU if MCK is configured to 48
MHz (OSCSEL = 1).
It is not necessary to indicate size to download in ARM vector 6 as 4096 bytes are downloaded in
every case.
Timeout Value in Seconds
Supported NAND Flash Manufacturers
OSCSEL = 1
32.768
1
22
1.49
“DataFlash Boot” on page 80
32.768
1
OSCSEL = 0
Figure
AT91SAM9260
Identifier
0xEC
0x2C
0x98
0x04
0x8F
0x07
0x20
13-8)
for more information
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0.78
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