I recently want to access GPIO of the advantech MIO-5251 board.
I found that the GPIO was attached to iManager which was connect
to the CPU by LPC. The iManager is an advantech device to manage
the whole system, including temperature and fan .... "embedded
controller ..." item was found in the BIOS. It has an interrupt, sleep
mode setting and watchdog... This is really interesting that it
implements a standalone
device that completes some functions of the SMI. The influence made
to the real-time performance by this device needs to be assessed.
If I get something valuable later, I will come back.
Have a nice day!
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