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I have seen in your Reference Design for the AM65xx that the MMC1_SDCD is connected directly to the CPU. Also, there is a Pull-Up resistor to the VDSHV_SD_IO. As far as I know, this voltage is switched automatically from 3.3V to 1.8V in the SD protocol. But the datasheet says that Pin B24 has a max. voltage of 2V. I can´t see my mistake, can you help me?
Best regards
Adrian
Hi Adrian,
The EVM was designed based on the data available at the time the device was first released. The voltage level associated with the MMC1_SDCD was originally associated with the VDDSHV_SD_IO rail in that documentation. This will be documented as a known issue for the EVM and will be fixed in the next version of the board.
Regards, Bill