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DIP-switch S3Signal Schematic NameConnected toFunctionalityNotes
S1-1JTAG_ENSC CPLD U5, bank 1, pin 82enables JTAG interface of SC CPLD U5SC CPLD programmable through JTAG connector, J8
S1-2VID0_FMC_VADJ_CTRLSC CPLD U5, bank 1, pin 71set 3-bit 3bit code to set adjust FMC_VADJ voltage

The FMC_VADJ voltage is provided by DCDC U7 EN5365QI,

the voltage can be set adjusted from 0.8V to 3.3V in 7 steps:

Set DIP-switches as  bit pattern "S1-4 | S1-3 | S1-2:  FMC_VADJ":

0 | 0 | 0 :   3.3V
0 | 0 | 1 :   2.5V
0 | 1 | 0 :   1.8V
0 | 1 | 1 :   1.5V
1 | 0 | 0 :   1.25V
1 | 0 | 1 :   1.2V
1 | 1 | 0 :   0.8V
1 | 1 | 1 :   Reserved

S1-3VID1_FMC_VADJ_CTRLSC CPLD U5, bank 1, pin 63
S1-4VID2_FMC_VADJ_CTRLSC CPLD U5, bank 1, pin 62

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