# M2 to ethernet board design on kicad 8

This repository holds the hardware for M2 to ethernet board with a intel I225 controler with TSN feature.

This board contains :
 * a I225 : KTI225IT S LNNL from intel
  – advance feature : Time Sensitive Networking (TSN) –
 * a 8-pin connector (not RJ45 !) to connect an Ethernet cable
 * a PPS output on UFL connector



Release 1 (July 2024) : first version (not working)

Release 2 (Nov 2024) :
 * fixed bugs
   + fix signal inversion: PCIE_TX_N with PCIE_TX_P
   + fix Intel reference I225 with advance feature to to handle TSN
   + remove from design solder paste from connectors
   + add solder paste on ethernet transformer pads
   + remove gnd plane under ethernet transformer
 * addons
   + PCIE SM bus is now connected I225 (normally not necessary)
   + The flash can be programmed via an external SPI programmer:
     - 4 resistors need to be removed to operate this programming
     - SPI bus connection and supply are on 1mm test point
 * what remains to be done :
   * complete fonctionnel schematic rewiew
   * check bom (possibly reduce bom by grouping components)
   * generate fab files




