We set GPIO1_IO08 mux to ALT1 for SD1_VSELECT, but when we set uSDHCx_VEND_SPEC.VSELECT to 1 it does not switch to 1.8 Volts and the DLSL[0-3] data lines stay low.
Hello,
Is SD_VSEL of the PMIC changed ?
Is it possible to try software modification of PMIC SD output voltage configuration ?
Have a great day,
Yuri
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YuriMuhin_ng I just got back to this problem. I set uSDHCx_VEND_SPEC.VSELECT to 1 and confirmed that SD_VSEL of the PMIC changed by measure C49 next to U4 to be 1.8V. I also measured pin 9 and pin 1 on the SD connector J6 to only be around 0.8V. When uSDHCx_VEND_SPEC.VSELECT is set to 0, I measure C49 and pins 9 and 1 to be 3.3V.