SMAFreqMulti: set mmcm bw to HIGH for lower jitter

2024-04-26 15:01:06 +08:00 · 2024-04-26 15:01:06 +08:00 · 2bbaea3ad5
parent 5abd274060
commit 2bbaea3ad5
1 changed files with 1 additions and 1 deletions
--- a/src/gateware/wrpll.py
+++ b/src/gateware/wrpll.py
@ -203,7 +203,7 @@ class SMAFrequencyMultiplier(Module, AutoCSR):
            # MMCME2 is capable to accept 10MHz input while PLLE2 only support down to 19MHz input (DS191)
            # The MMCME2 can be reconfiged during runtime using the Dynamic Reconfiguration Ports
            Instance("MMCME2_ADV",
-                p_BANDWIDTH="LOW",  # lower jitter
+                p_BANDWIDTH="HIGH",  # lower output jitter (see https://support.xilinx.com/s/question/0D52E00006iHqRqSAK)
                o_LOCKED=self.mmcm_locked.status,
                i_RST=self.mmcm_reset.storage,