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test system (e.g., without needing probes, calibration etc.).
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17. Check if version or revision of a PCB can be accessed via gateware.
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## Schematics conventions
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1. Use same page size (e.g., A3) for all schematics pages.
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2. Check that schematics read from left to right. Make the signals flow
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that direction: i.e., inputs on the left, outputs on the right of
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the page.
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3. Power symbol for positive supply should point up. Those for negative
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supplies and GND should point down.
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4. Name power P3V3, M5V0, GND, AGND etc.
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5. Clock signals: add frequency in name (eg. CLK\_100, CLK20\_VCXO).
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6. Negative signal names: suffix \_N (e.g. PB\_RESET\_N), do not use
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over-line that disappears in text files.
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7. Number components simply, like R1, R3, C1, L1 etc. Do not use names
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like Rbias1 and Cin2 as one may see used in datasheets.
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8. Unused signals available on connectors (e.g. P12V, VADJ): do not
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connect a wire to them, leave open.
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9. Mark resistor values as follows: 47 (for 47 Ohm), 4R7 (for 4.7 Ohm),
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4K7 (for 4.7 kOhm = 4700 Ohm)
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## FMC mezzanine cards
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1. An FMC mezzanine should have a specific EEPROM (24AA64T-I/MC).
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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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## Schematics conventions
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1. Name power P3V3, M5V0, GND, AGND etc.
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2. Power symbol for positive supply should point up. Those for negative
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supplies and GND should point down.
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3. Clock signals: add frequency in name (eg. CLK\_100, CLK20\_VCXO).
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4. Unused signals available on connectors (e.g. P12V, VADJ): do not
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connect a wire to them, leave open.
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5. Negative signal names: suffix \_N (e.g. PB\_RESET\_N), do not use
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over-line that disappears in text files.
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6. Use same page size (e.g., A3) for all schematics pages.
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## Documentation
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1. Check that each schematics page has on the same location the [Open
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-----
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Erik van der Bij - 20 June 2017
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Erik van der Bij - 27 February 2018
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