Part Number: DP83867IS
My customer wanted to confirm if the DP83867IS will work on his set-up. She is planning to interface this device to a processor that only supports a 1Gbps SGMII interface; is it possible for the PHY (medium side) to operate at 10/100Mbps even if it use only 2 diff pairs instead of 4? Also want to confirm that even if the medium side is operating at 100Mbps, will the interface to the MAC still be ok to run at 1Gbps? Are there any special settings that need to be made in the registers to operate in this way?
Thanks in advance.
Can you clarify what you mean when your processor only supports 1Gbps SGMII? The SGMII interface operates at a constant frequency, it will not down-grade like RGMII at different Copper speeds. The DP83867 supports using the SGMII interface at 100Mbps when there is a 100Mbps Copper link.
The DP83867 can operate at 10/100Mbps speeds using only 2 differential pairs. Channels C and D can be left disconnected as an example.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.