# HG changeset patch # User Mychaela Falconia # Date 1595528056 0 # Node ID b2d6d8f756eabdfde7d4c0dd9450dc4acf5ef0a1 # Parent 40e2106a0500b598033b12088e854dd2bb6275f8 duart28/design-spec: re-measured partial power-down current diff -r 40e2106a0500 -r b2d6d8f756ea duart28/design-spec --- a/duart28/design-spec Thu Jul 23 06:59:32 2020 +0000 +++ b/duart28/design-spec Thu Jul 23 18:14:16 2020 +0000 @@ -172,8 +172,8 @@ device is up and running (VRPC Active state), but there is no USB host connected, current can flow from Calypso outputs into a powered-down FT2232D (or other front-end chips) in the USB DUART adapter. With our current raw -FT2232D-to-Calypso arrangement we have about 5 mA of current flowing per pin -under the described condition, which is a little too much. +FT2232D-to-Calypso arrangement we have about 5.8 mA of current flowing per pin +under the described condition, which is way too much. If we replace the generic FT2232D breakout with our own custom adapter board design, we can solve the second partial power-down problem (the case of Calypso