DP83620: 100BASE-TX mode work can not work

Hello,

Can you please check if the fiber mode is getting enabled? You may check register<0x16>[6] for that. Also do make sure that SFP used supports 100BaseFx and its wavelength is correct for it to be received by the link-partner.

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Regards,

Vikram

The SFP can work with DP83640. I read the  register<0x16> is 0x14b,That's all correct. 

Just to rule out the link-partner, can we try linking two 640 boards? Also is required Fx mode, correctly selected : half/full duplex?

DP83620 can work after wirte 0x2100 or 0x2000 in register 0x00. although I read  register<0x00> is 0x2100 but it must write it.

Can we say that you are not gated by this issue anymore?

This issue  help me to  identify the register<0x16>[ is right. But  I do'nt understand  I read  register<0x00> is 0x2100 but it must write it   then DP83620 can work 。