We are interfacing ZYNQ XC7Z030-1FBG676I with DP83867IRPAPT High Immunity 10/100/1000 Ethernet Physical Layer Transceiver. DP83867 Ethernet PHY ' IO support is 3.3V/2.5V/1.8V level.
PFA DC Analysis . The above , 1.8V DC analysis that is not compatible for ZYNQ and DP83867 under 1.8V (VOL and VIL condition ) interface. Now , we changed to 3.3V between ZYNQ and Ethernet PHY in the given information .
Interface detail: 1. ZYNQ - VCCO_MIO1_501 is connected to 3.3V DC and DP83867 Ethernet PHY ' Input/Output lines is 3.3V. 2. PS_MIO_VREF_501 and PS_MIO16_501 to PS_MIO53_501 are 3.3V level.
Now , We read it in user guide document : " ug865-Zynq-7000-Pkg-Pinout" page no: 12. It is mention that " For PS_MIO_VREF : Voltage reference for the MIO interface. When the MIO interface is configured for RGMII, set to 0.9V with VCCO_MIO1 at 1.8V. In any other case, tie to VCCO_MIO1 or leave floating" .
We have some questions. 1. For RGMII mode , Shall we connect 3.3V signal to PS_MIO_VREF and PS_MIO16_501 to PS_MIO53_501 signal lines? 2. For RGMII mode is support 1.8V only?