TMS320F2800137: BOOT OPTION

hi luke

 0x03 is the default vaule , it is impossiable,configred the BOOTDEF VALUE form 0x03 to  0x23 ,because it cannot program a 0 to 1 by high 4bit.

Where is the explanation？you said:you can program boot settings in zone 2, which will override the boot settings programmed in zone 1.

Hi Youjun,

There are two separate OTP locations for programming boot settings. One is in DCSM Zone 1 (addresses 0x78000 to 0x781FF), the other is Zone 2 (addresses 0x78200 to 0x783FF). If you program settings in zone 2, the programmed settings in zone 1 will be ignored.

Thank you,

Luke

hi luke

i kown If you program settings in zone 2, the programmed settings in zone 1 will be ignored.

What I don't understand is the BOOTDEF VALUE form 0x03 to  0x23 ,because it program a 0 to 1 by high 4bit.0000->0010,This is allowed?you said : cannot program a 0 to 1 in OTP.

This is contradictory.

Hi Youjun,

No it is not possible to program a 0 to a 1 in OTP. Additionally, ECC values are programmed along with the OTP values, so you will likely not be able to change a 0x23 to a 0x03 since there is a high probability of programming an ECC bit from a 0 to a 1.

Thank you,

Luke

hi

you said:so you will likely not be able to change a 0x23 to a 0x03 since there is a high probability of programming an ECC bit from a 0 to a 1.

0x23 to a 0x03 is  not be able to change 

or 0x03 to a 0x23 is  not be able to change?

hi Luke

Is there any article explaining this? I still can't understand.