TMS320F28388D: Writing OTP Memory with Flash Settings

Hi Mehmet,

Are you only trying to configure your boot settings? If so then writing to these fields alone via the On-Chip Flash tool is enough to configure them. However you must specify all 4 fields before programming since each field can only be programmed once, and they are all programmed simultaneously when using the On-Chip flash tool. Let me know if you have any further questions.

Thank you,

Luke

Hi Luke,

Thank you for your reply.

Yes, I just want to change boot settings.

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I will use one boot mode select pin (0x0F - GPIO15).

So BOOTPINCONFIG Bit Fields (Z2-GPREG1) 0x5AFFFF0F

I am plannig to use Flash Boot (0x03 - BOOT_DEF0) and SCI Boot (0x01 BOOT_DEF1) modes.

So BOOTDEF Bit Fields for Low (Z2-GPREG3) 0xFFFF0103, for High (Z2-GPREG4) 0xFFFFFFFF .

But I don't know how to use Z2-GPREG2 field. What should I write to this field ?

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You said that "each field can only be programmed once". For this reason, I am planning to write Zone 1 first. If something went wrong, I could use Zone 2. 
Because of Zone 2 higher priority than Zone 1***, the value that Zone 1 have will be ignored. 

Am I thinking correctly about this?

***According to TRM page 706 ( SPRUII0E ): 
"It is recommended to use Z1-BOOTPINCONFIG first and then if OTP configurations need to be altered, switch to using Z2-BOOTPINCONFIG."

Best regards,

Mehmet.

Hi Mehmet,

Z2-GPREGx should be written to in the same manner as Z1-GPREGx. You are correct that writing to Z2-GPREG will override the Z1-GPREG settings.

Let me know if you have any further questions.

Thank you,

Luke

Hi Luke,

Thanks for your reply again.

In fact, I know that Z2 is written same manner with Z1.

But I wanted to ask that what should I write to the Zx-GPREG2 field.

But I find the answer. TRM Page 719 explain this issue.

I think I could write 0x5AFFFF3F to the Zx-GPREG2 fields.

Thanks,

Best regards

--Mehmet