FreeCalypso > hg > freecalypso-schem2
annotate venus/src/usb/regulator_with_caps.v @ 36:c1256c8757c3
eliminate R209 and tie Iota VLMEM directly to UPR
We already eliminated R210 (VLMEM pull-down option) earlier, because
our simplified LCD power supply and reset line wiring is incompatible
with 1.8V MEMIF. But with VLMEM always needing to be high, a pull-up
resistor offers no advantage over a direct tie to UPR, so let's
eliminate the superfluous resistor.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 22 Nov 2021 19:19:59 +0000 |
parents | 4722b265cb8c |
children |
rev | line source |
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24
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Venus src: USB domain captured
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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1 module regulator_with_caps (GND, IN, OUT); |
4722b265cb8c
Venus src: USB domain captured
Mychaela Falconia <falcon@freecalypso.org>
parents:
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2 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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3 input GND, IN; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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4 output OUT; |
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Venus src: USB domain captured
Mychaela Falconia <falcon@freecalypso.org>
parents:
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5 |
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Venus src: USB domain captured
Mychaela Falconia <falcon@freecalypso.org>
parents:
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6 regulator_ic reg (.IN(IN), |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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7 .OUT(OUT), |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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8 .GND(GND), |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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9 .EN(IN) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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10 ); |
4722b265cb8c
Venus src: USB domain captured
Mychaela Falconia <falcon@freecalypso.org>
parents:
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11 |
4722b265cb8c
Venus src: USB domain captured
Mychaela Falconia <falcon@freecalypso.org>
parents:
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12 capacitor input_cap (IN, GND); |
4722b265cb8c
Venus src: USB domain captured
Mychaela Falconia <falcon@freecalypso.org>
parents:
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changeset
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13 capacitor output_cap (OUT, GND); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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14 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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15 endmodule |