Dip switch re-assigned a different function on V3
In version 2.1 dip switch with index 1, labelled EXTRA_SWITCH_1 on the schematic below, is assigned to the glitch-filter ON/OFF functionality [1].
This is not apparent in the schematic and the port name should be labeled clearly. EXTRA_SWITCH_1 must be renamed GLITCH_FLTR_EN for instance.
Due to the labeling not being clear, this switch has in fact been re-assigned to another function in V3 of the board (switch ON for FAST mode, switch OFF for default mode). This has been marked on the silkscreen, like so:
Therefore the silkscreen should be corrected in V4 to assign a different switch to the fast mode and re-label the ports on the schematics accordingly. Also a label for the glitch-filter on/off feature can be added on the pcb silkscreen.
Note that since all the switches are connected to general purpose I/O ports on the FPGA, this error in switch assignment does not affect the wiring of the board. Th addition and implementation of switch functionality is instead all be implemented in gateware.
[1] CONV-TTL-BLO user guide.