Part Number: AM5718
Hi,
I'm tasked at implementing a power cycling of the SD card for proper return to initial condition.
Am I understanding correctly that the 3.3V Vdd supply of the SD card is the one to be cycled? Thus not requiring VSDMMC to be power cycled?
Previous reply I'm referring to:
"We discussed this issue with our Linux software team and were told the only way to return the SD card back to its initial operating condition is by cycling power to the card. Therefore, the system needs to implement a GPIO controlled power switch that allows software to cycle the SD card 3.3V supply to properly support UHS-1 cards. The control signal for this power switch needs to be turned on by default during power-up to support boot from SD card since the ROM boot code does not know which GPIO is used to control the power switch. The control signal also needs to be an AND logic function of the GPIO and power-on reset signal, so the power switch turns off when the system is reset without a power cycle."
