FreeCalypso > hg > freecalypso-schem2
annotate venus/src/usb/eeprom_93Cx6_16bit.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 | 9f70dc110ad7 |
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rev | line source |
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venus/src/usb: building blocks from DUART28
Mychaela Falconia <falcon@freecalypso.org>
parents:
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1 module eeprom_93Cx6_16bit (GND, VCC, CS, SK, DIN, DOUT); |
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venus/src/usb: building blocks from DUART28
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, VCC; |
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venus/src/usb: building blocks from DUART28
Mychaela Falconia <falcon@freecalypso.org>
parents:
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4 input CS, SK, DIN; |
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venus/src/usb: building blocks from DUART28
Mychaela Falconia <falcon@freecalypso.org>
parents:
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5 output DOUT; |
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venus/src/usb: building blocks from DUART28
Mychaela Falconia <falcon@freecalypso.org>
parents:
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6 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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7 /* instantiate the package; the mapping of signals to pins is defined here */ |
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venus/src/usb: building blocks from DUART28
Mychaela Falconia <falcon@freecalypso.org>
parents:
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8 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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9 pkg_IC_8pin pkg (.pin_1(CS), |
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venus/src/usb: building blocks from DUART28
Mychaela Falconia <falcon@freecalypso.org>
parents:
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10 .pin_2(SK), |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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11 .pin_3(DIN), |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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12 .pin_4(DOUT), |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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13 .pin_5(GND), |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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14 .pin_6(VCC), /* ORG input on some 93Cx6 variants */ |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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15 .pin_7(), /* no connect */ |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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16 .pin_8(VCC) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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17 ); |
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Mychaela Falconia <falcon@freecalypso.org>
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18 |
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19 endmodule |