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TMS320F280049C: usage of User-configurable DCSM OTP Bank 0 and User-configurable DCSM OTP Bank 1

Xin Chen
Intellectual 590 points
Part Number: TMS320F280049C

Hello,

     There are two OTPs(User-configurable DCSM OTP Bank 0 and User-configurable DCSM OTP Bank 1) in TMS320F280049C.

     I have studied the reference manual.But something is not clear.

    Q1:What is the default value of the OTP block from 0x78010 to 0x7801F and OTP block from 0x78210 to 0x7821F?

         it looks like that they are not all ones from new device.

    Q2: What's the bits definition of ZxOTP_GPREG1 ,ZxOTP_GPREG2,ZxOTP_GPREG3,ZxOTP_BOOTCTRL, ZxOTP_JTAGLOCK,ZxOTP_PSWDLOCK,and ZxOTP_CRCLOCK?   

    Q3:What is the OTP  location of ZxOTP_JTAGLOCK? I can not find the memory map for this OTP word.

    Thanks~

Best regards~

Xin Chen

  • 0
    TI__Guru** 113815 points

    Hi Chen,

        Q1:What is the default value of the OTP block from 0x78010 to 0x7801F and OTP block from 0x78210 to 0x7821F?

             it looks like that they are not all ones from new device.

    Yes, default values is not ALL_1 for some of the OTP location. Please refer "Table 3-17. Default Value of ZxOTP_CSMPSWD1 (programmed by TI)" in device TRM for the value.

      Q2: What's the bits definition of ZxOTP_GPREG1 ,ZxOTP_GPREG2,ZxOTP_GPREG3,ZxOTP_BOOTCTRL, ZxOTP_JTAGLOCK,ZxOTP_PSWDLOCK,and ZxOTP_CRCLOCK?   

    All GPREGx and BOOTCTRL register are used for boot hence described in that section. Please refer section "4.6.1 Boot ROM Registers" in TRM.

    JTAGLOCK is reserve field on this device. We'll correct that in TRM. CRCLOCK and PSWDLOCK field description is explained in section "Table 3-92. Z1_OTPSECLOCK Register Field Descriptions".

    Regards,

    Vivek Singh