FreeCalypso > hg > fc-small-hw

view lcdtest1/README @ 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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This board is an ad hoc adapter for connecting a HaoRan HT020K1QC36S LCD
to an FT2232D board used in the MCU host bus emulation mode.  The objective
here is only to connect the LCD for picture quality testing - no mechanical
prototyping for the handset is done on this board.