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96boards / mezzanine-community

Repository for community designed mezzanine boards for the 96boards specification.
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Serial Mezzanine v2 #105

Open ric96 opened 5 years ago

ric96 commented 5 years ago

Idea by @edolnx to create a more BMC-like serial mezzanine.

Here is the not very good block diagram, real PR with schematics from KiCAD coming soon: https://docs.google.com/presentation/d/1QWmrCeDlf2ppB9VF9HgMG6vnkkTAB0eYvpYOhqfH8O4/edit?usp=sharing

Thore-Krug commented 3 years ago

The CP2108 IC has I2C which is the Interface used by the INA260 Current sensor, but i dont know how difficult it would be to implement. But it would save on space, Hardware-complexity and Bom Cost.

Thore-Krug commented 3 years ago

The Datasheet of the CP2108 is conflicting about the Io Voltage. There was a Discussion about the that on the silicon Labs as well: https://www.silabs.com/community/interface/forum.topic.html/can_vio_of_cp2108be-KHYX

Which states that the CP2018 dos NOT Support 1.8V Voltage. so it might be necessary to choose another IC. I wonder if there are people who used the IC out of spec with 1.8V.

Ping: @mwelling @edolnx

mwelling commented 3 years ago

CP2103 maybe?

mwelling commented 3 years ago

Looks like CP2103 is NRND. How about CP2105?

https://www.silabs.com/documents/public/data-sheets/CP2105.pdf

mwelling commented 3 years ago

Wait we need 3 UARTs looking at the block diagram. Hmmmm.

mwelling commented 3 years ago

Maybe replace the attiny with a USB capable microcontroller and pass UART through?

Thore-Krug commented 3 years ago

Or a level shifter IC ? Like on the I2S Mezzanine ?!

mwelling commented 3 years ago

That could work.