This post came from QnA of WIZnet website
I’m embedding a WIZ220 module into another product, and have a few questions:
Can these boards be modified to run on 3.3V instead of 5V (i.e. bypass the on-board LDO)?
I see some products have a version without an RJ45 and magnetics. I would prefer to AC couple the PHY output directly into an unmanaged Ethernet switch, and avoid the magnetics. Is there a version of the 220 with direct PHY output? If not, can the 220 be ordered with the RJ45 unpopulated?
What is the purpose of the F_RST pin? Under what conditions would we need the ability to pull this pin low?
I see no definition for the P2_2 or P2_4 pins. They’re unconnected on your base board. What are they?