Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK Hoja De Datos

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SAM9M10 [DATASHEET]

6355F–ATARM–12-Mar-13

NVM Bootloader Sequence Diagram

The NAND Flash bootloader program uses the EBI CS3. It uses both valid code detections. First it searches a
boot.bin file. Then it analyzes the ARM exception vectors.

The first block must be guaranteed by the manufacturer. There is no ECC check.

After NAND Flash interface configuration, the Manufacturer ID is read. If it is different from 0xFF, the Device ID is
read, else, the NAND Flash boot is aborted. The Boot program contains a list of SLC small block Device ID with
their characteristics (size, bus width, voltage) (see 

). If the device ID is not found in this list, the NAND

Flash device is considered as an SLC large block and its characteristics are obtained by reading the Extended
Device ID byte 3.

SPI Flash Boot

Yes

TWI EEPROM Boot

Yes

NAND Flash Boot

Copy from

NAND Flash to SRAM

Run

Yes

NAND Flash Bootloader

No

SD Card Boot

Copy from

SD Card to SRAM

Run

Yes

SD Card Bootloader

No

Device

Setup

No

No

SAM-BA

Monitor

Copy from

SPI Flash to SRAM

Copy from

TWI EEPROM to SRAM

SPI Flash Bootloader

TWI EEPROM Bootloader

Run

Run