E3940 Fast SPI interface for different slaves

[JVV]

Hi!

We are working with E3940 microproccesor. We have the following doubt:
This processor has the Fast SPI interface specific for connecting two SPI Flash memories and a TPM device.
In our design we have only one flash memory connected to Chip Select 2 (BIOS), and TPM connected to Chip Select 0. Our doubt is if we can connect to Chip Select 1 a SPI device that is not a flash memory. Can we connect any other generic SPI device connected to this Fast-SPI interface?
Best Regards.

[JVV]

[CarlosAM_INTEL · Accepted solution]

Hello, @JVV:

Thank you for contacting Intel Embedded Community.

You can find the information that may help you in section 28.2, on page 314 of the Intel® Pentium® and Celeron® Processor N- and J- Series (Formerly Apollo Lake) Platform Design Guide [PDG] document # 557775; and in section 19, on pages 190, 191, 192, 193, and 199 of the  Apollo Lake Platform Intel
Architecture Firmware Specification (Volume 2 of 2) BIOS Specification document # 559811. They can be found when you are logged into your Resource & Design Center (RDC) privileged account on the following websites:

http://www.intel.com/cd/edesign/library/asmo-na/eng/557775.htm

http://www.intel.com/cd/edesign/library/asmo-na/eng/559811.htm

The RDC Account Support form is the channel to process your account update request or report any inconveniences with the provided sites. It can be found at:

https://www.intel.com/content/www/us/en/forms/support/my-intel-sign-on-support.html

Best Regards,

@CarlosAM_INTEL.