FreeCalypso > hg > fc-small-hw
annotate lcdtest1/README @ 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 | 0f9bdd60ce50 |
children |
rev | line source |
---|---|
0
0f9bdd60ce50
fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1 This board is an ad hoc adapter for connecting a HaoRan HT020K1QC36S LCD |
0f9bdd60ce50
fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
2 to an FT2232D board used in the MCU host bus emulation mode. The objective |
0f9bdd60ce50
fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
3 here is only to connect the LCD for picture quality testing - no mechanical |
0f9bdd60ce50
fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
4 prototyping for the handset is done on this board. |