Did A13-Olinuxino-Micro had the same build as A13-Olinuxino?
the same https://github.com/OLIMEX/OLINUXINO/tree/master/SOFTWARE/A13/A13-build ?
For the A13-OLinuXino-MICRO use this one: https://www.olimex.com/wiki/A13-SOM-building-latest-Debian
Best regards,
Lub/OLIMEX