FreeCalypso > hg > fc-small-hw
view duart28/src/primitives @ 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> |
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date | Sun, 28 Jun 2020 22:06:24 +0000 |
parents | 43097651a26d |
children |
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/* * This file defines the primitives to be instantiated from the structural * Verilog source for the board: IC package types, basic components and * subpackages to be mapped later in the MCL binding step. */ resistor numpins 2; capacitor numpins 2; inductor numpins 2; /* IC packages */ pkg_LQFP48 numpins 48; pkg_5pin numpins 5; pkg_8pin numpins 8; /* 74LVC541A single buffer and common part subpackages */ buffer_ic_slot mapped_pins (A, Y); buffer_ic_common mapped_pins (Vcc, GND, nOE1, nOE2); /* crystal resonator */ xtal_2pin_pkg numpins 2; /* connectors */ header_2pin numpins 2; header_3pin numpins 3; header_10pin numpins 10; conn_miniUSB_plus4 numpins 9;