Other Parts Discussed in Thread: DS50PCI402,
The situation I encountered was a PCIe root port with X8 GEN3 signal, and the downstream device had X4 GEN2 bandwidth. We found that sometimes the device can only recognize the X1 GEN2 bandwidth.
We hope to place a redriver between the root port and the device to improve compatibility.
These are my questions.
1. In this case, which redriver is recommended?
2. In this case, is a limited redriver or linear redriver a better choice?
3. If we use a GEN3 redriver, then the GEN3 signal is still after the redriver? At this time, will there be speed and bandwidth negotiation between the redriver and the device? Otherwise, will the negotiation return to the root port?
4. If using GEN2 redriver, the signal after redriver will become GEN2 signal?
5. I found that SN65LVPE504 and DS50PCI402 are GEN2 redrivers. What is the difference between these redrivers? According to my requirement, which one is recommended? DS50PCI402 is an 8-channel redriver, I can use DS50PCI402 instead of two SN65LVPE504 to achieve bidirectional mode.