IMX515 Fuze Bits

wysockilukasz — Tue, 30 Jul 2013 13:11:02 GMT

Hello,

I have problem with IIC module for IM515. I'm traing to burn fuse bits using Lauterbach Jtag and

programing sequency from RM (page 1174).
For example for fuse FB0REG1 ADDR: 0x83f98844 (default value:0x00)

I would like to achieve value 0x60 (set BT_LPB_FREQ[2:0] = b011)

To do that I'm wrote a short script in TRACE32:

//////////////////////first bit

//Write 8’hAA to PRG_P

Data.Set d:83F98028 %l 0xAA

//User writes target bit address to UPA/LPA using IP Bus

//UA

Data.Set d:83F98014 %l 0x00

//LA

Data.Set d:83F98018 %l 0x8D

//User sets PRG bit

Data.Set d:83F98010 %l 0x01

//Set PROGD in STAT

Data.Set d:83F98000 %l 0x02

///////////////////////// second bit

//Write 8’hAA to PRG_P

Data.Set d:83F98028 %l 0xAA

//User writes target bit address to UPA/LPA using IP Bus

//UA

Data.Set d:83F98014 %l 0x00

//LA

Data.Set d:83F98018 %l 0x8E

//User sets PRG bit

Data.Set d:83F98010 %l 0x01

//Set PROGD in STAT

Data.Set d:83F98000 %l 0x02

////////////////////////third bit is 0!

After I will execute it FB0REG1 = 0x60 but when I reset the cpu FUSE back to the default value = 00.

It is not important how the imx boot moode (Internal Boot / Internal Boot-ROM Selected)

Mayby I don't understand algorytm.

Can anyone can help my?

Lukas.

Re: IMX515 Fuze Bits

wysockilukasz — Thu, 01 Aug 2013 09:47:50 GMT

Problem solved!

The algorithm above is correct but I also need to set the bit:

efuse_prog_supply_gate (CGPR -> 0x73FD_4064),

(and additional information, you must have a 3.3 V on pin VDD_FUSE).

Lukas.