As part of improvements to the Versal
architecture, the smallest unit that can be reconfigured is much smaller than in
previous architectures. The minimum required resources for reconfiguration varies based
on the resource type, and are referred to as a Programmable Unit (PU). Many site types
have improved PU requirement making granularity of reconfigurable Pblocks significantly
improved compared to previous architecture.
Tip: Although the fundamental building blocks are shown in the following images, in real
design scenarios these building blocks will be part of a larger collection of
resources, creating a comprehensive floorplan for each dynamic region.
You can use get_dfx_footprint -pu -of_objects
[get_tiles <tile_name>]
to get the PU of any tile in a Versal device. For information, enter get_dfx_footprint -help
. The PUs are not design dependent. You can load any device with
link_design -part <device_name>
or create an
I/O planning project and use the get_dfx_footprint
command with the -pu
switch to get the PU of any
tile.
Following are the details provided for each site type.
- Programmable Logic (PL) NoC NMU and NSU
- The PU is the corresponding NOC_NMU or NOC_NSU tile.Figure 1. PL NoC NMU and NSU
- CLE
- Two adjacent CLE tiles share a routing resource (interconnect
tile). The PU is the two CLE tiles (four SLICE sites) with shared
interconnect.Figure 2. CLE PU
- Block RAM
- The PU is the corresponding block RAM tile. One block RAM tile
includes two RAMB18s and one RAMB36. Adjacent INTF and INT tiles are
automatically pulled into the routing footprint if it is not covered by the
Pblock. Unlike previous architecture, adjacent CLE sites are not part of the
block RAM PU.Figure 3. Block RAM PU: RAMB18s and RAMB36 of One Block RAM Tile
- URAM
- The PU is the corresponding URAM tile. One URAM tile includes
only one URAM site. The adjacent INTF and INT tiles are automatically pulled
into the routing footprint if it is not covered by the Pblock.Figure 4. URAM PU: URAM Tile
- DSP
- The PU is the corresponding DSP tile. One DSP tile includes two
DSP sites.Figure 5. DSP PU: DSP Tile
- IRI_QUAD (ODD/EVEN)
- The PU is the corresponding INTF_ROCF_TL_TILE. One tile
includes four IRI Quads. The INTF at the center of the IRI quads is
automatically pulled into the routing footprint. Although IRI_QUADs are user
range-able, the adjacent IRI_QUADs of the RP Pblock are automatically pulled
into the routing footprint, because the expanded routing footprint is always a
two INT tile expansion.Figure 6. IMUX Register Interface Quad: PU is INT_ROCF_TL Tile
- PCIe
- The PU is the corresponding PCIEB_BOT_TILE. The adjacent INTF
tiles are automatically included in the routing footprint of the reconfigurable
Pblock.Figure 7. PCIe PU is PCIe Tile
- GTY_QUAD
- The PU is the corresponding GTY_QUAD_SINGLE tile. Sites
included in the tile are GTY_QUAD and GTY_REFCLK. The adjacent INTF_GT tiles are
automatically pulled into the routing footprint of the reconfigurable
Pblock.Figure 8. GTY_QUAD PU is GTY_QUAD Tile
- DDRMC and DDRMC_RUI
- The PUs are the corresponding DDRMC_DMC_CORE and DDRMC_RIU_CORE
tiles respectively.Figure 9. DDRMC PUFigure 10. DDRMC_RUI PU
- MMCM
- The PU is a corresponding CMT_MMCM tile.Figure 11. MMCM PU is CMT_MMCM Tile
- XPLL
- The PU is the corresponding CMT_XPLL tile.Figure 12. XPLL PU is CMT_XPLL Tile
- DPLL
- The PU is the corresponding CMT_DPLL tile.Figure 13. DPLL PU is CMT_DPLL Tile
- MRMAC
- The PU is the corresponding MRMAC_BOT tile.Figure 14. MRMAC PU is MRMAC_BOT Tile
- BUFG_FABRIC, BUFG_PS and GCLK_DELAY
- These three site types are included in same CLK_VNOC tile.
BUFG_PS will be present only in the VNOC column adjacent to CIPS. Other VNOC
tiles include only BUFG_FABRIC and GCLK_DELAY. The PU requirement is the
CLK_VNOC tile.Figure 15. BUFG_FABRIC, BUFG_PS, and GCLK_DELAY Shares Same Tile As PU
- XPHY, XPIO and IOB
- An I/O bank in Versal
devices cannot be shared by static and reconfigurable partitions. All
XPIO_NIBBLE tiles of one I/O bank must be used by one partition only.Figure 16. XPHY, XPIO and IOB PU
- BUFG_GT, BUFG_GT_SYNC and GCLK_DELAY
- The CLK_GT tile is the PU.Figure 17. BUFG_GT, BUFG_GT_SYNC Share Same PU: CLK_GT Tile
- XPIPE_QUAD
- The XPIPE_QUAD tile is the PU.Figure 18. XPIPE_QUAD PU
- BUFGCE, BUFGCTRL, and BUFGCE_DIV
- For the BUFGCE elements in HSR, the PU is the
CLK_REBUF_BUFGS_HSR_CORE tile.Figure 19. Clocking Buffers in HSR Has CLK_REBUF_BUFG_HSR_CORE Tile As PU
- BUFGCE_HDIO, HDIO_BIAS, HDIO_LOGIC, and IOB
- For these sites in HDIO, the PU is the HDIO_TILE tile.Figure 20. Clock Buffers and IOB in HDIO Bank Share Same PU: HDIO_TILE