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strange behaviour of EMIF Nor flash in No boot mode and in Nor boot mode

Mahendra varman
Intellectual 500 points
Other Parts Discussed in Thread: TMS320C6678

Hi

We developed our custom board with TMS320C6678 with I2c EEPROM (same IC used in EVM 6678) and with EMIF NOR Flash.

Without programming IBL in EPROM, If I connect emulator, put board either in no boot mode or in nor boot mode If I try to read device id / write /erase EMIF NOR flash its working perfectly ( we modified the platform driver to suite our EMIF Nor flash and its working ).

After Programming the IBL , I can able to read / write / erase flash only if i keep the board in No boot mode

If I keep the board in nor boot mode ( after programming IBL in eeprom) even the device id of nor flash read  through the emulator is wrong .

why this behaviour occurs ?

Please suggest

Thanks