Re: How can I read OCOTP of I.MX28 ?

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Re: How can I read OCOTP of I.MX28 ?

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prab
Contributor I

   Hello, Yixing and everybody, I'd like to ask  if this statement from the reference manual of I.MX28 was correct:

"ENABLE_PIN_BOOT_CHECK

Blow to enable boot loader to first test the LCD_RS pin to determine if the pin

boot mode is enabled. If this bit is blown and LCD_RS is pulled high, then boot

mode is determined by the state of LCD_D[5:0] pins. If this bit is not blown, skip

testing the LCD_RS pin and go directly to determine the boot mode by reading

the state of LCD_D[5:0]."           Is that not a  tautology?

 

 

i.


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Yuri
NXP Employee
NXP Employee

All is correct : ENABLE_PIN_BOOT_CHECK fuse defines if LCD_RS pins should be tested in order to select what is source of boot
configuration: pins or fuses. From section 12.2.1 (Boot Pins Definition and Mode Selection) of the i.MX28 Reference Manual :
"If LCD_RS is pulled down, then the boot mode is determined by the OTP eFuse bits, as defined in Table 12-4."

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