Z3X EasyJtag Software ver. 2.1.0.1
Loading eMMC Addon Firmware... IO: 2800 mV
Box S/N: 0CFFE017763A18DA, ,FW Ver.: 01.54
CMD Pullup Level:2093 mV
CMD Active Level:2567 mV
Setup firmware update mode, wait 2..30 sec... 
Success!
Sending eMMC firmware...
Success!
Verifying eMMC firmware...
Success!
Flashing eMMC firmware...
Success!
Repairing eMMC CID...
Success!
eMMC firmware is updated now!
Please reconnect all eMMC lines before next operation!
Please don't forget to repair extCSD from backup!
Please don't forget to configure BOOT sizes!
Done.