Tool/software:
Good day,
I am using the DP83867IS Ethernet PHY with 4-wire SGMII. This only utilizes the SI/SO pairs. I do however use the SGMII_CO pins for strapping for some addresses.
The datasheet states the following regarding balanced loads on the differential pairs:
RX_D1 is not a strap input, but this pin must be populated with the same strap resistors chosen
for RX_D0. RX_D0 and RX_D1 form an SGMII differential pair. The dummy straps on RX_D1 are
required to provide a balanced load for this SGMII differential pair.
I understand the purpose of duplicating the strap resistors within used differential pairs, but do I need to add the strapping to SGMII_CO_n (RX_D1) if I am not using the SGMII_CO pair?
Below is an example.
