i.mx50 OCOTP device unique ID

[aleksanderosipo]

I want to use the unique device ID in its software. In imx50.pdf written that device unique in OCOTP_CFG0 - OCOTP_CFG1 registers. I found that OCOTP_CFG consists of fields DIE-X-CORDINATE, WAFER_NO, LOT_NO_ENC, but I do not understand what is a unique ID. Where can I find more detailed information about OCOTP bits?

Another question: Is OCOTP_GP0 and OCOTP_GP1 really free to use, and I can write to them any desired value?

[Yuri]

MFG tool configuration for i.MX50 (Linux) contains example how to burn (MAC) fuses in ucl.xml

[aleksanderosipo]

Yes, I know about this way.  I want will make sure that OCOTP_CFG0-1 contents really unique for each chip

[Yuri]

The unique ID is based on DIE-X-CORDINATE, WAFER_NO, LOT_NO_ENC...