Mark, the information on the TPS of this NUC about the Custom Solutions Header is available on page 50.
In order to get additional and accurate information please post your question to the Embedded community at the following link Forum: Embedded Community | Embedded Community
This is the excerpt from the product specification, v6. But it does not indicate which input pin of the E3815 Atom this signal is attached to. Can I find this information from the ACPI tables? I do not want to use the application launch feature, but in a driver as an interrupt source to indicate when data is available on the I2C bus. I am trying to identify the ball number on the SoC package. I will have the application launch feature disabled in the BIOS if required.
SCI/SMI GPIO: input signal for direct connection to a signal (such as a front panel push-button) capable of triggering an OS-level command in Windows (formerly referred to by Microsoft as Direct Application Launch*). Voltage level I/O for this pin is 3.3 V. Refer to below URL for accompanying utility to map triggered event to Windows file. https://downloadcenter.intel.com/Detail_Desc.aspx?lang=eng&DwnldID=22035
I followed the link you gave me but could see how to post anything there. Always got the message that I am not allowed to create or edit content, so I gave up on that!
Anyway, overnight I have identified the pin and if it is appropriate, I can post back here a summary on using the Custom Solutions Header SMI_SCI_GPIO pin as an interrupt source with the Intel drivers and Microsoft GPIO framework on Windows 8.1 Embedded OS, including the information and changes required to the ACPI ASL to disable the current behaviour, and add the behaviour you need to enable the changed function (still getting the facts together on this part at the moment).
What about GNU/Linux support as requested at :
For the record let me quote :
Intel NUC Board DE3815TYBE Technical Product Specification
Custom Solutions Header (2.0 mm Pitch)
The Customs Solution header is designed to expose access to platform-level signals, enabling custom development of solutions based on such signals.
1.8 Vstby, 3.3 Vstby and 5 Vstby: can be used to power custom solution (such as
daughtercard, etc.) with up to 2 A of current rating capability per each of these voltages. Pins
can also be used to monitor the presence of 1.8 V, 3.3 V and 5 V standby power. Standby
power is always on, even when board power is off.
SCI/SMI GPIO: input signal for direct connection to a signal (such as a front panel push-button) capable of triggering an OS-level command in Windows (formerly referred to by Microsoft as Direct Application Launch*). Voltage level I/O for this pin is 3.3 V. Refer to below
URL for accompanying utility to map triggered event to Windows file