Negative Power supplies Mounted/Not mounted
FMCs lacking real state to generate negative power supplies could
benefit from the carrier -5V, -2V and -12V and the positive +5V. Notice
that as they are not compatible with the Vita 57 standard their use is
NOT RECOMMENDED.
Normally they will be mounted if really required.
In the Negative Power supply free PCB:
- All components instantiated in the schematic page power_supply_negative should be unmounted.
- R292 and R309 in page power_supply_switching should be changed to 4k2 and 2k4 to reduce the 5V voltage to 3V7. The 5V is used to generate a clean 3V3.
- On page fmc_connector do not mount: C252, R67, R68, R71, R76, C394, R113, R103, C36, R66, R65, R70, R75, R91, R90, C251, R287, R286, C407, R349, R350, R278, R282, R337, R336.
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