Minimum Device Requirements - 3.4 English

Versal Adaptive SoC CPM Mode for PCI Express Product Guide (PG346)

Document ID
PG346
Release Date
2024-05-30
Version
3.4 English

CPM4

CPM4 Gen4x16 configurations can only be enabled when using DMA mode, as described in Versal Adaptive SoC CPM DMA and Bridge Mode for PCI Express Product Guide (PG347). PCIe® controller-only mode does not support Gen4x16. The support is limited to Gen4x8.

Table 1. CPM4 Controller-Only Maximum Configurations (Versal AI Core)
Speed Grade -1 -1 -2 -2 -2 -3
Voltage Grade L (0.70V) M (0.80V) L (0.70V) M (0.80V) H (0.88V) H (0.88V)
Gen1 (2.5 GT/s per lane) x16 x16 x16 x16 x16 x16
Gen2 (5 GT/s per lane) x16 x16 x16 x16 x16 x16
Gen3 (8 GT/s per lane) x16 x16 x16 x16 x16 x16
Gen4 (16 GT/s per lane) x8 x8 x8 x8 x8 1 x8 1
  1. x16 configuration is available using CPM4 in DMA mode. For details, see Versal Adaptive SoC CPM DMA and Bridge Mode for PCI Express Product Guide (PG347).

CPM5

For CPM5, Gen4x16 and Gen5x8 configurations PCIe controller only mode can be supported by enabling AXI-ST 1024-bit interface.

Table 2. CPM5 Controller-Only Maximum Configurations (Versal Premium, Versal HBM, Versal AI Core)
Speed Grade -1 -1 -2 -2 -2 -2 -2 -3
Voltage Grade L (0.70V) M (0.80V) L (0.70V) L (0.70V) M (0.80V) M (0.80V) H (0.88V) H (0.88V)
Overdrive 1 Don’t Care Don’t Care No Yes No Yes Not Applicable Not Applicable
Speed File -2LP -2LHP -2MP -2MHP
Gen1 (2.5 GT/s per lane) x16 x16 x16 x16 x16 x16 x16 x16
Gen2 (5 GT/s per lane) x16 x16 x16 x16 x16 x16 x16 x16
Gen3 (8 GT/s per lane) x16 x16 x16 x16 x16 x16 x16 x16
Gen4 (16 GT/s per lane) x8 x8 x8 x16 2 x8 x16 2 x16 2 x16 2
Gen5 (32 GT/s per lane) 3 N/A N/A N/A x8 2 N/A x8 2 x8 2 x8 2
  1. For information on requirements for supplying overdrive voltages, see Versal Premium Series Data Sheet: DC and AC Switching Characteristics (DS959) and Power Design Manager User Guide (UG1556).
  2. CPM5 PCIe Gen5x8 and CPM5 PCIe Gen4x16 require use of AXI-ST 1024-bit interfaces between CPM5 and the programmable logic.
  3. CPM5 PCIe Gen5 support is available only in Versal Premium, Versal HBM, and Versal AI Core series.