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TMS320DM368: Leopard Board 368 -NAND write protected! Unable to flash

Part Number: TMS320DM368

Hello Everyone,

We are using TI serial flash utility sfh_dm36x.exe to flash UBL and UBOOT to NAND .

The NAND erases successfully but writing UBL and UBOOT failes as its shows the NAND is Write protected.

Below are some of console messages  seen during the process.

How to make it unprotected?

What might be the reason for it to be write protected?

Regards,

Sanath Rai