LS1043

[ChienNQ]

Hi NXP support team,

Can I connect XFI on LS1043 to SFP+ direcly (without Physical and retimer) ?
Thanks and best regards,

Trend Nguyen 

[June_Lu]

XFI is an electrical specification defined in INF-8077. 

For the FPGA, please assess the XFI SPEC and your requirement.

LS1043A support XFI electrical specs for 10G Enet, XFI (1 lane @ 10.3125 Gbaud)

[June_Lu · Accepted solution]

Sorry, LS1046 in the last reply should be LS1043A.

If the FPGA works like the PHY with XFI interface, you could follow the LS1043ARDB(Layerscape LS1043A Reference Design Board | NXP Semiconductors) Aquantia PHY part without Retimer. If you want to use 10GBASE-KR between the FPGA and LS1043A, LS1043A does NOT support 10GBase-KR.

[ChienNQ]

Hi @June_Lu ,

Thanks for you support. 

That mean LS1043A can connect drirect to FPGA by XFI interface? Right?

 "LS1043A does NOT support 10GBase-KR" I checked page 52  QorIQ LS1043A Reference Manual, Rev. 6, 07/2020, XFI can support  10GbE, can you help me clear this point? 

Trend Nguyen, 

[June_Lu]

LS1046A does NOT support SFI, but it does support XFI.

So, LS1046A  XFI interface will utilize the ReTimer to make the conversion from XFI to SFI for the SFP+ module. SFI are the electrical specs for the SFP modules to be used in the SFP cage.

[ChienNQ]

Hi @June_Lu ,

 In our application, we have LS1043 and FPGA. Can we connect them by  XFI port? 

Please see the file attach to clear my question. 

Thanks and best Regards,

Trend Nguyen

[ramprakash07]

Yes, you can connect the XFI on LS1043 directly to an SFP+ without a physical layer (PHY) or retimer. However, it's important to note that the LS1043's XFI interface is designed to connect directly to an optical module or a copper cable, but not to a backplane or long copper cable without a retimer.

For the best performance, it's recommended to use a short direct attach copper (DAC) cable or an optical module. If you're using a long copper cable or a backplane, you may need to use a retimer to ensure signal integrity.

[ChienNQ]

Hi @ramprakash07 '

Thank for your support. 

Can you show me simple blockdiagram connect XFI on LS1043 with another chipset support SFP+?

Thanks and best regards,

Trend Nguyen