SATA-Connectors: Length Matched? LVDS?
Posted: Thu Jan 12, 2023 11:44 pm
Hello!
I want to use the SATA connectors to receive data from a sensor with an LVDS clock lane and 2-3 LVDS data lanes.
This means one of the clock capable pair of one of the connectors would be used for the clock, and the other three pairs would be used for data lanes. At higher data rates it would be very helpfull if the trace length from FPGA pin to the SATA connector is the same for all 4 differential lanes.
Is that the case on the Redpitaya? Or are only the two differential lanes of each connector length matched?
And would LVDS be possible? Officially the Zynq only does "LVDS25" on its HR bank, and for that the bank needs to be powered from 2.5 V.
On the Redpitaya 14-125 the bank with the SATA connectors is powered from just 1.8 V. But according to this page it should still be possible: https://support.xilinx.com/s/article/43 ... uage=en_US
In my case the LVDS voltage is within the VIN requirement of the bottom chart, and the differential pairs that lead to the SATA connectors are terminated with 100 Ohm on the Redpitaya.
Does anyone have experience with receiving LVDS on those SATA connectors?
Thank you!
I want to use the SATA connectors to receive data from a sensor with an LVDS clock lane and 2-3 LVDS data lanes.
This means one of the clock capable pair of one of the connectors would be used for the clock, and the other three pairs would be used for data lanes. At higher data rates it would be very helpfull if the trace length from FPGA pin to the SATA connector is the same for all 4 differential lanes.
Is that the case on the Redpitaya? Or are only the two differential lanes of each connector length matched?
And would LVDS be possible? Officially the Zynq only does "LVDS25" on its HR bank, and for that the bank needs to be powered from 2.5 V.
On the Redpitaya 14-125 the bank with the SATA connectors is powered from just 1.8 V. But according to this page it should still be possible: https://support.xilinx.com/s/article/43 ... uage=en_US
In my case the LVDS voltage is within the VIN requirement of the bottom chart, and the differential pairs that lead to the SATA connectors are terminated with 100 Ohm on the Redpitaya.
Does anyone have experience with receiving LVDS on those SATA connectors?
Thank you!