... | ... | @@ -12,11 +12,28 @@ backplane = complete 10-port WR switch. |
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\- provides PHY autocalibration (not supported by the MCH) on downlink
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ports
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The drawing below shows the block diagram of the
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mini-backplane:
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The drawing below shows the block diagram of the mini
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backplane:
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![](/uploads/d5b7c3a2ef26661a9c8b3d2e18f7fd4e/mini_backplane_diagram.jpg)
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The mini-backplane can be split into 4 subblocks:
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\- MCH connector: a modified AMC right-angle connector (CN1) normally
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used to attach AMC cards onto AdvancedTCA blades. The PCB footprint has
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reversed pin order, so the MCH can be plugged in with the component side
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facing upwards (unlike the AMC cards, where the bottom side of the PCB
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is facing the top).
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\- power supply: delivers +12 V / 3 A bulk power to the MCH (via a
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MOSFET switch controller by the watchdog MCU), +3.3 V / 3 A for the SFPs
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and the backplane logic and +3.3 V / 200 mA microTCA management power.
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The 12 VDC is supplied from a separate AC power supply module.
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\- SFP assemblies: SFP cages with I/O expanders and calibration
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buffers
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\- I2C logic: I2C hub and I/O expander.
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### Files
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