Hello. ... > +#define MX51_PAD_SD2_DATA1__USBH3_H2_DP IOMUX_PAD(0x7c8, 0x3c0, 2, __NA_, 0, NO_PAD_CTRL) ... > +#define MX51_PAD_SD2_DATA2__USBH3_H2_DM IOMUX_PAD(0x7cc, 0x3c4, 2, __NA_, 0, NO_PAD_CTRL) We need to add SION-bit on these pins, as says in MX51 reference manual.