[gta02-core] [PATCH] New ECN: Insert 0R resistors into SPI signals

Werner Almesberger werner at openmoko.org
Sun Sep 6 00:14:23 CEST 2009

Rask Ingemann Lambertsen wrote:
> +Insert 0R resistors into SPI signals

Thanks ! I ... tried to check it in, but Dave beat me to it ;-)

> +The SC32442B SPI interface running at 13 MHz or faster has timing problems[1]
> +that we might need to patch up externally.

I think this is an issue we can safely ignore. First of all, I doubt
anyone will actually want to try to debug that mess. Second, this is
something that only happens in the chip we have. Any future project
would use a different CPU (the 2442 is getting old, the MCP we have
doesn't have enough RAM, and it's only SDR to start with.)

I wouldn't worry about the cost of adding 0Rs (which is near-zero),
but about adding a lot more components to the board, making it more

Again, please don't try to over-optimize the gta02-core design for
longevity. That's not what it's for. The more time we spend fussing
over minor details, the longer it will take until we get a chance to
get our hands on something we really want.

- Werner

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