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elhep / AFCZ

AMC FMC Carrier board based on ZYNQ Ultra Scale + SoC
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FMC2_CLK.CLK2_BIDIR has three start/endpoints #123

Closed marmeladapk closed 3 years ago

marmeladapk commented 3 years ago
  1. FMC
  2. Crosspoint switch (CLK10)
  3. IC78 repeater to J13 (input only)

AFAICT IC78 doesn't have internal termination so it could be potentially placed on the clock and not disturb it much (with short stubs). However I feel that there should be pads to select which way does the clock go to avoid reflections (this could be a bit tricky since there are 3 options).

If pads are implemented then IC78 should get external termination.

marmeladapk commented 3 years ago

Same with AMC_TELECOM_CLOCK.TCLKA.