Proposed communication protocol between Host and EC for 1.75
wad at laptop.org
Wed May 26 19:38:11 EDT 2010
On May 25, 2010, at 10:38 AM, Richard A. Smith wrote:
> On 05/24/2010 11:03 PM, Mitch Bradley wrote:
>> Another protocol idea is at
> The SPI interface on the CPU is shared with the SPI boot flash. So on
> boot the CPU has to be master and then switch over to slave when the
> boot it finished. To use this setup we will also have to negotiate a
> master slave switch when the CPU wants to change mfg data or when it
> wants to update the firmware.
Not quite true, as there are additional SPI interfaces available through
the SSP ports.
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