Bojan Merela

i.MX51 SBMR - e-Fuses & GPIO overrides

Discussion created by Bojan Merela on Oct 12, 2011
Latest reply on Oct 13, 2011 by Bojan Merela

Hi,

 

We try to boot i.MX51 from NAND flash, but we have some difficulties...

 

1. All e-Fuses are intact (not burned)

2. We use GPIO pins to override e-Fuses (GPIO_BT_SEL = intact)

3. But not all GPIO pins are sampled to SBMR, just some...

4. For example we can set BT_MEM_TYPE to: 01 and it reflects in SBMR, but setting this to: 10 shows up as 00 in SBMR, on the iMX51 EVK board we see the same result

5. We are reading SBMR using ATK (custom nand kernel image). BMODE=00 and BMODE=10

6. If we program some binary to flash than we will not get to the serial downloader

 

any clues?

 

best regards,

Bojan

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