I'm thinking of building a board with CMOD-A7 connected to Gigabit Ethernet PHY chip (like Micrel / Microchip KSZ9031).
as the gigabit signals are using 125Mhz clock and are on both clock edges (250Mhz) I need to keep trace length and 50ohm controlled impedance.
Is there any info about trace length inside the CMOD PCB? pins with 50ohm controlled impedance? (short traces may do the work if I'll place the PHY close to the CMOD)
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Eliezer
Hello,
I'm thinking of building a board with CMOD-A7 connected to Gigabit Ethernet PHY chip (like Micrel / Microchip KSZ9031).
as the gigabit signals are using 125Mhz clock and are on both clock edges (250Mhz) I need to keep trace length and 50ohm controlled impedance.
Is there any info about trace length inside the CMOD PCB? pins with 50ohm controlled impedance? (short traces may do the work if I'll place the PHY close to the CMOD)
I'm trying to avoid designing a full FPGA board
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