FreeCalypso > hg > fc-small-hw

annotate lcdtest1/schem+bom/primitives @ 28:bd7eec55ebc0

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duart28: new design ideas * added input buffers (LVC with Ioff feature) to prevent high current flow from powered-up target into powered-down FT2232D inputs; * added series resistors on outputs to limit current flow from powered-up adapter into powered-down Calypso target; * buffer IC changed from 74LVC125A to 74LVC541A.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 28 Jun 2020 22:06:24 +0000
parents 0f9bdd60ce50
children
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0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
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1 /* connectors */
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
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2 header_2pin numpins 2;
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
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3 header_13pin numpins 13;
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
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4 conn_36pin numpins 36;
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
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5 conn_36pin_plus2 numpins 38;
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
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6
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
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7 /* passives */
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
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8 resistor numpins 2;