Hi taishan3721,
Thank you for posting in Intel Ethernet Communities.
You may find datasheet for Intel Ethernet Controller I226 in Intel Resource & Documentation Center (RDC) below:
https://www.intel.com/content/www/us/en/secure/content-details/596659/intel-ethernet-controller-i225-i226-datasheet.html?wapkw=i226%20datasheet
However, please be inform that this file may requires access to RDC and CNDA due to data privacy. If you would like to request access, you can refer below (Premier DevZone access)
How to Register and have Access to Intel® Premier Support:
https://www.intel.com/content/www/us/en/support/articles/000057045/ethernet-products.html
Hope this clarifies.
Regards,
Sazzy_Intel
Intel Customer Support Technician
