Reset : asynchronous or synchronous ?

$HDL_WORK/applications/lofar2/doc/prestudy/

Ref:
 $RADIOHDL/tools/oneclick/doc/rtsd_firmware_dag_erko.txt
 $RADIOHDL/tools/oneclick/doc/rtsd_firmware_overview.txt

 https://support.astron.nl/confluence/display/SBe/VHDL+design+patterns+for+RTL+coding