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Visitor yaron11
Visitor
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Registered: ‎07-02-2017

SGMII config through PS-GTR GEM1 to 100Mb/s

On our custom board, we have a Marvell 1G PHy Alaska 88E1512 connected to MpSOC Ultrascale+ PSGTR on GEM1 interfaced using SGMII.

The copper side of the PHY is a 100BASE-T.

In UG1085 (V1.8), pp997  it is written that GEM Features support 10/100/1000 Mb/s transfer rates and that SGMII to PS GTR tranceivers (1000Mb/s rate only) . This formulation is rather misleading.

Is there any way I can make the PS GTR tranceiver to work compatible to 100 Mb/s ? 

 

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Moderator
Moderator
121 Views
Registered: ‎11-09-2017

Re: SGMII config through PS-GTR GEM1 to 100Mb/s

Hi 

Did you check with by enable auto-negotiation in device and link partner ?

When bit [27] (SGMII mode) in the network configuration register (GEM{0:3}.network_config[sgmii_mode_enable]) is set, it changes the behavior of the auto-negotiation advertisement and link partner ability registers to meet the requirements of SGMII.

Regards
Pratap

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