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ad_fmclidar1_ebz/README: Add Known Issues section 

Add  description of the power-up issue and its solution.
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István Csomortáni 2019-12-18 16:59:47 +02:00
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projects/ad_fmclidar1_ebz/README.md
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@ -114,6 +114,20 @@ parameter and attributes.
| GT reference clock | 250MHz | | GT reference clock | 250MHz |
| Device clock | 250 MHz | | Device clock | 250 MHz |
## Known issues
### The Lidar boards do not power up
**Problem:** The Lidar boards do not power up because the PG_C2M pull-up resistor value on the carrier (Arria 10) is too high.
**Solution:** On Arria 10 - place a 4k7 ohms resistor in parallel with R5517.
**Note:**
1. The PG_C2M can no longer be software controlled. As soon as there is an auxiliary 3V3 on the carrier, the Lidar platform receives the power up command.
2. This problem only affects Lidar Rev B.
## References ## References
+ AD-FMCLIDAR1-EBZ product page: https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/AD-FMCLIDAR1-EBZ.html + AD-FMCLIDAR1-EBZ product page: https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/AD-FMCLIDAR1-EBZ.html