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LPC3250 SD card interface

Question asked by shiv shankar on May 19, 2017
Latest reply on Jul 18, 2017 by CarlosCasillas

I am interfacing SD Card in LPC3250 processor, facing issue in command line.


1) SD Clock is configure to 196 KHZ and powered up then i am issuing command

2) On Command line

      - When SDMMC_IDLE(Put card in idle mode) command is sent the status register indicate the command is sent.
      - When MMC_SENDOP_COND(Send operating condition) command is sent the status register indicate timeout.


Problem: No command is sent Other than IDLE command. Status register indicate TIMEOUT i tried it for different SD clock rate from 190 to 320 kHZ.

Please respond any workaround?