... | ... | @@ -50,7 +50,7 @@ |
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2. Differential signals: check if both \_P and \_N are used (and have
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really this polarity).
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3. Check each connection of ICs. Notably hard-wired settings of ICs
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(division/amplification factors, operating modes etc. Add a note).
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(division/amplification factors, operating modes etc.). Add a note.
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4. Check polarity of capacitors, notably on those connected to negative
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power supplies.
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5. Check correct polarity of diodes and LEDs.
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... | ... | @@ -81,19 +81,18 @@ |
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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. Align components on a page.
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4. Show clearly from which power supply each component is powered.
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5. Power symbol for positive supply should point up. Those for negative
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3. Show clearly from which power supply each component is powered.
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4. 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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6. Name power P3V3, P5V, M5V, GND, AGND etc.
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7. Clock signals: add frequency in name (eg. CLK\_100, CLK20\_VCXO).
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8. Negative signal names: suffix \_N (e.g. PB\_RESET\_N), do not use
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5. Name power P3V3, P5V, M5V, GND, AGND etc.
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6. Clock signals: add frequency in name (eg. CLK\_100, CLK20\_VCXO).
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7. 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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9. Number components simply, like R1, R3, C1, L1 etc. Do not use names
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8. 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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10. Unused signals available on connectors (e.g. P12V, VADJ): do not
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9. 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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11. Mark resistor values as follows: 47 (for 47 Ohm), 4R7 (for 4.7 Ohm),
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10. 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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... | ... | @@ -132,5 +131,5 @@ |
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-----
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Erik van der Bij - 3 November 2021
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Erik van der Bij - 14 January 2022
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