AN 778: Intel® Stratix® 10 L-Tile/H-Tile Transceiver Usage

ID 683086
Date 6/24/2022
Document Table of Contents Simplex Channel Merging

You can merge the following logical instances into a single physical channel:
  • RX-only PHY and TX-only PHY instances (RX-only GXT and TX-only GX PHY instances cannot be merged into the same physical channel location.)
  • CMU PLL and TX-only PHY instances
Figure 32. Simple Channel Merging: RX-only PHY and TX-only PHY
Figure 33. Channel Merging: CMU PLL and TX-only PHY instances

Rules for Merging

  • Reconfiguration interface (reconfig_*) of both instances to be merged must be driven by the same source.
  • QSF assignments are needed to specify which two reconfiguration interfaces you want to merge.
    • Option 1: Using reconfiguration interface names
      • set_instance_assignment -name XCVR_RECONFIG_GROUP 0 -to topdesign:topdesign_inst|<TX only instance name>*ct1_hssi_avmm1_if_inst->inst_ct1_xcvr_avmm1
      • set_instance_assignment -name XCVR_RECONFIG_GROUP 0 -to topdesign:topdesign_inst|<RX only instance name>*ct1_hssi_avmm1_if_inst->inst_ct1_xcvr_avmm1
    • Option 2: Using pin names
      • set_instance_assignment -name XCVR_RECONFIG_GROUP 0 –to tx[0]
      • set_instance_assignment -name XCVR_RECONFIG_GROUP 0 –to rx[0]
  • The simplex channels cannot be merged if any of the following options are enabled in one or both simplex instances:
    • Native PHY Debug Master Endpoint (NPDME)
    • Optional reconfiguration logic
    • Embedded reconfiguration streamer
    • Shared reconfiguration interface