FreeCalypso > hg > freecalypso-schem2
view README @ 96:ae6951a70d2b
U403: change from 74LVC2G125 to 74LVC2G126
The two parts have the same footprint and pinout, but '126 3-state buffers
have active-high OE inputs instead of active-low. The change is purely
for software benefit: having GPIO 11/12 set to 1 correspond to that current
contribution being enabled will be much more intuitive for developers and
tinkerers.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Mon, 09 May 2022 19:27:11 +0000 |
parents | 0401fe6893ea |
children |
line wrap: on
line source
This Hg source repository contains work in progress towards schematic-level design of FreeCalypso Venus GSM phone handset prototype and development board. Instead of graphical schematics, we use our own in-house board-level hardware design language (ueda, based on structural subset of Verilog), but aside from the different form of representation, this level of design is equivalent to schematics.