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# | RefDes | Action | Comments |
1 | R140 | Remove | resistor 220Ω |
2 | R141 | Remove | resistor 499Ω |
3 | C52, C55 | Add | capacitor 22pF |
4 | Y1 | Add | crystal 25MHz 3.2mm x 2.5mm SMT |
5 | R138 | Remove | resistor 220Ω |
6 | R139 | Remove | resistor 499Ω |
7 | C154, C158 | Add | capacitor 22pF |
8 | Y2 | Add | crystal 25MHz 3.2mm x 2.5mm SMT |
The components locations are marked green / red in the pictures below:
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# | RefDes | Action | Comments |
1 | R102, R103 | Remove | resistor 0Ω |
2 | R95, R96 | Add | resistor 1kΩ |
The components locations are marked red in the picture below:
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Impact
R95/R96 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.
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