... | ... | @@ -59,17 +59,19 @@ |
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current flows through.
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9. Check if signal levels are compatible between outputs and inputs
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(LVTTL etc.).
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10. Check for any crosses on wires (showing no connection) and check
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10. Check if direction of signals correct (i.e. hierarchy connectors,
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FMC uni-directional)
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11. Check for any crosses on wires (showing no connection) and check
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connectivity of crossing wires (a dot should show connected).
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11. Check if there is a note about hard-wired settings of ICs
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12. Check if there is a note about hard-wired settings of ICs
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(division/amplification factors, operating modes etc.).
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12. Calculate output voltage of DC/DC converters using formulas from
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13. Calculate output voltage of DC/DC converters using formulas from
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datasheet and check if corresponds with note on schematic.
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13. Check if components are aligned to make the schematics look clear.
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14. Check consistency of naming and numbering of schematic pages.
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15. Check for testability: can all signals be tested on a production
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14. Check if components are aligned to make the schematics look clear.
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15. Check consistency of naming and numbering of schematic pages.
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16. Check for testability: can all signals be tested on a production
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test system (e.g., without needing probes, calibration etc.).
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16. Check if version or revision of a PCB can be accessed via gateware.
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17. Check if version or revision of a PCB can be accessed via gateware.
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## FMC mezzanine cards
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... | ... | @@ -77,15 +79,16 @@ |
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2. EEPROM: GA1 should connect to A0, GA0 should connect to A1
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(Observation 5.22 [ANSI/VITA 57.1
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spec](http://cdsweb.cern.ch/record/1172409?ln=en) - CERN only).
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3. TDI (D30) and TDO (D31) are connected together if not used on the
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3. EEPROM: should be powered by P3V3AUX, not P3V3.
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4. TDI (D30) and TDO (D31) are connected together if not used on the
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mezzanine.
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4. Have a note on the schematic about allowed Vadj level (e.g. most
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5. Have a note on the schematic about allowed Vadj level (e.g. most
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carriers on ohwr can provide only 2V5).
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5. Foresee decoupling capacitors near the FMC connector (allowing power
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6. Foresee decoupling capacitors near the FMC connector (allowing power
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pins to work as signal return too).
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6. Connect all mounting holes to ground (this is not in the
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7. Connect all mounting holes to ground (this is not in the
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specification, but is the best practice).
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7. Consider using a thermometer/unique ID IC (DS18B20U+) as is used on
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8. Consider using a thermometer/unique ID IC (DS18B20U+) as is used on
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most OH FMC designs (this is not in the specification, but is the
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best practice).
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... | ... | @@ -122,5 +125,5 @@ |
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-----
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Erik van der Bij - 29 May 2017
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Erik van der Bij - 20 June 2017
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