FreeCalypso > hg > fc-small-hw
comparison duart28/src/vsrc/board.v @ 28:bd7eec55ebc0
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 | 9e71844f4db0 |
| children |
comparison
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| 27:b58388f57c16 | 28:bd7eec55ebc0 |
|---|---|
| 20 | 20 |
| 21 regulator_with_caps reg_3V3 (.GND(GND), .IN(P_5V), .OUT(P_3V3)); | 21 regulator_with_caps reg_3V3 (.GND(GND), .IN(P_5V), .OUT(P_3V3)); |
| 22 regulator_with_caps reg_2V8 (.GND(GND), .IN(P_5V), .OUT(P_2V8)); | 22 regulator_with_caps reg_2V8 (.GND(GND), .IN(P_5V), .OUT(P_2V8)); |
| 23 | 23 |
| 24 application_block app ( .GND(GND), | 24 application_block app ( .GND(GND), |
| 25 .P_3V3(P_3V3), | |
| 25 .P_2V8(P_2V8), | 26 .P_2V8(P_2V8), |
| 26 .ADBUS(ADBUS), | 27 .ADBUS(ADBUS), |
| 27 .BDBUS(BDBUS) | 28 .BDBUS(BDBUS) |
| 28 ); | 29 ); |
| 29 | 30 |