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Remove the components from table below:
# | RefDes | Qty | Action | Comments |
1 | R153 | 1 | Remove | RES 740ohm |
2 | U24 | 1 | Remove | 74LVC1G125GW |
3 | U26 | 1 | Remove | 74LVC1G125GW |
The components locations are marked green in the pictures below:
Components side
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Print Side
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Impact
The changes outlined partially impact functionality of the M.2 connector:
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If strictly required, operation may be safe in open-drain configuration as long as software behaviour is validated first.
SFP Rate-Select (RS0/RS1)
Note: Clearfog Base revision 1.4.4 and later already include these changes.
Dis-/Assemble the components from table below:
# | RefDes | Action | Comments |
1 | R40, R41 | Remove | resistor 0Ω |
2 | R37, R38 | Add | resistor 1kΩ |
Impact
R37/R38 enable high-speed mode (10Gbps) for TX and RX on SFP modules.
Without this change CN9130 SoM SFP port will be limited to sgmii (2.5Gbps and lower) speeds even though the cpu side supports up to 10Gbps.