Hello, I'm developing a board using the I.MX23 and I want to boot from an SD Card. Do I need to write anything to the OTP memory to do this?
I am confused about the default behavior of the SD_POWER_GATE_GPIO and SD_POWER_UP_DELAY. Do most SD card require a power up delay? Or would I be fine without it? This board is for my own education so it does not need to be very robust.
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Hi john
two OTP bit fields in HW_OCOTP_ROM0 should be burned for SD boot:
1. SD_MBR_BOOT
2. SD_POWER_GATE_GPIO
Bitburner can be used during development.
IMX_OTP_TOOLS : A set of tools for managing OTP bits on the i.MX23 and i.MX28.
Contains BitBurner.exe, the otp_burner.py and BitInit.exe.
Best regards
igor
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Bitburner can be used to write to the OTP memory
IMX_OTP_TOOLS : A set of tools for managing OTP bits on the i.MX23 and i.MX28.
Contains BitBurner.exe, the otp_burner.py and BitInit.exe.
Best regards
igor