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Boot pins for SD Card in C6748

Srinidhi Sreepad
Prodigy 190 points

Hello,

I had a question regarding booting from the SD card in C6748. I am using theTMS320C6748 processor for one of my projects, and I was running some of the starterware examples on LCDK C6748. My question is - the boot mode in the LCDK for MMC/SD0 is switches in SW1 [1-4] are [off, off, off, on]. I got this info from LCDK webpage. And the bootloader document for TMS320C6748 says that, for MMC/SD0 the boot pins BOOT[7:0] are 00x11100. Can anybody please confirm this information for me.

Thank you,

Srinidhi

  • 0
    TI__Guru*** 125430 points

    Both are correct.  From the device perspective you need to look at BOOT[7:0] pins.  From the board perspective you need to look at SW1.

    In particular, if you look at the schematics from the LCDK you'll see the following:

    • BOOT7 pulled down
    • BOOT6 pulled down
    • BOOT5 pulled down
    • BOOT4 connected to SW1[1] with ON=low and OFF=high
    • BOOT3 connected to SW1[2] with ON=low and OFF=high
    • BOOT2 connected to SW1[3] with ON=low and OFF=high
    • BOOT1 connected to SW1[4] with ON=low and OFF=high
    • BOOT0 pulled down

  • 0 in reply to Brad Griffis
    Prodigy 190 points

    Thank you for answering my question. It was very helpful.