The DDR3L interface requires a 1.3V supply rail ; ensure your board isn't strictly limited to older 1.2V LPDDR2 standards.
Why is "best" important? Because inferior JZ144 units suffer from: jz144 emmc best
Below is a breakdown of its assumed core specifications (based on common eMMC 5.1 standards) and where it performs best. The DDR3L interface requires a 1