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: While
the fundamental building blocks are shown in the following images, in real design
scenarios they will be part of a larger collection of resources, creating a
comprehensive floorplan for each dynamic region.
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
- BRAM
- The PU is the corresponding BRAM tile. One BRAM 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 BRAM PU.Figure 3. BRAM PU: RAMB18s and RAMB36 of One BRAM 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