SFP Control & Register Map

[gavin23]

If you're familiar with SFPs you'll know that they have a few control signals – TX Fault, TX Disable, SFP_Present, I2C, & Rate Select. Is there a standard register (ie for all SFPs) that give the status of these signals?

What I'd like to do is drive a signal such as Rate Select high or low and then read back through the I2C interface whether the mode was set.

Any ideas?
Gavin

 

[daraemon_liu]

some of these control signals can be controlled by I2C register inside the SFP or pin status outside of the SFP.
There is a standard of the register in the XFP.

 

[gavin23]

What register is this and where is it documented?

Thanks,
Gavin

 

[daraemon_liu]

Hi Gavin,
You can download the protocol of the SFP form the internet.
I know this because I did the board design with the SFP before,you can refer this document which is a datasheet of oclaro SFP.