• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 31 subscribers
  • Views 664 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMS570 MibSPI5 connecting to microSD card in 4 bit SD mode ?

Chris Abbott54224
Prodigy 120 points


Is it possible to use the MibSPI5 interface of the TMS570 in 4-bit data mode to communicate to a microSD card using SD mode.

I know we can use 1-bit SPI mode, but we would prefer the performance increase provided by SD mode if its possible.

Anyone done this ?

Examples ?

  • 0
    TI__Genius 13810 points

    Your request has been forwarded to our MDK owner. We will get back to you shortly.

    Regards,

    Haixiao

  • 0
    TI__Guru**** 197546 points

    Hi Chris,

    For 4-bit SD mode, there are 4 data signals, 1 CMD and 1 clock. The 4 data pins are input and output. For MibSPI5 in master mode, the SIMO is output only, and SOMI is input only. It is possible if you map SD_DAT[0] to SIMO0 and SOMI0, ..., SD_DAT[3] to SOMI3 and SIMO3, SD_CLK to SPI_CLK, SD_CMD to CS0 (GIO). Another way, you use SPI5 as GIO and maps SD_DAT[3:0], SD_CLK, SD_CMD to those GIO signals. To be honest, I didn't try those configurations. 

    Regards,

    QJ