Difference between revisions of "AT91 In-system Programmer (SAM-BA)"

Revision as of 17:09, 19 January 2011

The AT91 processors provide a ROM-based bootloader. This provides support for booting via SPI or NAND-Flash or an specially prepared SD-Card. If that bootloader can't find any bootable image, via USB a communication-channel for debuggin purposes can be established. The PC-program used to utilize this is called SAM-BA. The complete description can be found in the AT91SAM9G45 datasheet.

The bootloader can be selected using the BMS Pin. Per default this bootloader is disabled and the execution takes place directly in the first parts of the NOR-flash. As the debugging-functionality can be used via the JTAG-Interface, it is recommended not to use SAM-BA.

If SAM-BA has to be enabled for some specific circumstances on an ICnova SAM9G45 OEM, please contact our support, and we'll help you.

If it is needed on an ICnova SAM9G45 SO-DIMM, there is the possibility to change the boot-behavior using pin 8 of the module. This pin must be pulled agains 3V3 by an 1k resistor. This way, the Module could be debugged using the USB-port.

The SAM-BA application has to be configured using the AT91SAM9G45 itself and the correct memories connected to it.