ClearFog LX2162A Errata
Revisions and Notes
Date | Owner | Revision | Notes |
27/04/2023 |
| 1 | Production Release |
27/05/2023 |
| 2 | Resolved MAC addresses + DPMAC11 |
23/07/2023 |
| 3 | HW bugs workaround |
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Introduction
Short Description | Errata | Affected PCB rev | Fix or workaround |
upper 10Gbps SFP+ Port can not link up | It appears that the upper 10Gbps SFP+ port transmits a signal, but does not receive. Consequently the interface never detects a link. This could be either SW or HW issue, to be determined. | Any | SoM revision 1.0 had a short on the rx line. Fixed by upgrading to revision 1.1 or later. |
2x 2.5Gbps RJ45 not supported | 2 of the 8 RJ45 ports can from the hardware support 2.5Gbps ethernet. Software support for this configuration is incomplete. | Any | Limit to 1Gbps. |
1x RJ45 port can’t receive or transmit. | The second RJ45 port on the left, in bottom row while looking from the front currently can neither transmit nor receive. Likely cause is a bug in NXPs networking firmware for the SoC. | Any | Resolved by Software Update: SoC DEVDISR2 register had wrongly disabled dpmac11, causing tx/rx failure. |
MAC addresses randomised | Random MAC addresses are assigned to network interface after booting Linux, even though specific ones are stored on EEPROM. | Any | Resolved by Software Update. |
SFP+ MOD_ABS signal fail to detect module | HW bug - missing PU resistors to MOD_ABS signal | REV 1.1 | Added 10K resistors to each of the buffers - U1706, U1707, U1708 and U3003 from pin #1 to pin #5 *see attached instructions |
3.3V has a low voltage around 2.7V | HW bug - voltage drop on O-Ring diodes due to low current rating of the component | REV 1.1 | Remove D48 and assemble 0ohm 1/2W 0603 resistor from pin #1 to pin #3 *see attached instructions |
SFP+ fail to link up on optics module | HW bug - TX_DIS is floating causing optic transceiver to shut Tx laser due to module internal PU | REV 1.1 | Stitching of TX_DIS to GND *see attached instructions |
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