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Emx sd_pwr


#1

I use it to implement a custom board EMX.
I use SD_PWR the EMX (68 pin) for power supply to the SD card.
The distortion at the timing of writing and observing the waveform.
I have been in accordance with the instructions of your document in the connection.
We are considering also be connected to the SD card from a different power source
Whether there will be any problems with this method?


#2

welcome to the forum. I’d suggest you use the Fez Cobra as the reference circuit and layout for EMX. https://www.ghielectronics.com/catalog/product/131


#3

@ tklksg - You could also power the SD card straight from your power supply instead of using pin 68. Also make sure you have a reasonable decoupling capacitor near the SD card