| Group | Register Name | Instances | Multiplicity | Subsections | Type | Width (bits) |
| AFE | veto | 12 x 18 | 2 | 1 | int | 6 |
The veto register is actually two registers ``veto_dac'' and ``veto_vernier''. However they control the same voltage level, veto_dac being a coarse knob and veto_vernier being a fine one. By design 1 veto_dac count is 32 veto_vernier counts. This is needed to for precision tunning of the ACD veto threshold and the 0.01 MIP level. Since there are two registers, the vote file xml syntax differs a bit in order to be able to specify both register values. Here is an example:
<AFE_veto>
<broadcastDouble>0:0</broadcastDouble>
<exceptDouble arc='4' afe='7'>1:4</except>
</AFE_veto>