Greetings,
I'm trying to boot with the subjected configuration. The platform is based upon LogicPD Am1808 Experimenter board .
We have replaced the default numonyx 8MB SPI flash with a higher density SPI Nand Flash from Micron. Unfortunately, it is not a straight through replacement and the replacement chip only supports page read. Also, a read requires three commands (read to cache -> status check -> read cache) as opposed to a single command on numonyx (read bytes).
While reading the Application Report SPRABA5B Using the AM18xx Bootloader document, I discovered the following section:
6.2 SPI EEPROM or Flash Boot
To boot from a slave memory device connected to an SPI peripheral, the AIS contents (in binary format)
can be flashed directly to the memory device. The boot image must be placed at address 0 of the memory
device. SPI EEPROMs must use 16-bit addressing, while SPI flash chips must use 24-bit addressing. The
read command opcode for the SPI flash device must be 0x03.
Does this mean that the SPI Flash is incompatible as a boot method and we need a separate SPI Flash to boot from?
