U55C Gen3x16 XDMA base_3 Platform

Alveo Data Center Accelerator Card Platforms User Guide (UG1120)

Document ID
Release Date
1.9 English
Platform name
Supported by
Vitis tools 2022.1
Platform UUID
Interface UUID
Release Date
April 2022
Created by
2022.1 tools
Supported XRT version
2022.1, with support planned through 2022
Satellite controller (SC) FW release
Initial release 7.1.14

Updated to 7.1.17 with the April 2022 update

Link speed
Gen3 x16
Target card


Release Notes
Change log and known issues for the platform and the SC and CMC firmware are available in the Alveo U50 Master Release Notes Answer Record 75163.

The platform implements the device floor plan shown in the following figure and uses resources across the multiple super logic regions (SLR) of the device. The static and dynamic regions are shown across the SLRs, along with the available HBM memory connections associated with SLR0.

Platform Details

Figure 1. Floorplan

To get the same information for development platforms, if you install the Vitis unified software platform, use the platforminfo command utility. It reports information on interfaces, clocks, valid SLRs, allocated resources, and memory in a structured format. For more information, see platforminfo Utility in the Application Acceleration Development flow of the Vitis Unified Software Platform Documentation (UG1416).


The Alveo U55C card has access to a total of 16 GB high-bandwidth memory (HBM) accessible through 32 pseudo channels. In addition, it is possible to use device logic resources for small, fast, on-chip memory accesses as PLRAM. The following table lists the allocation of memory resources per SLR.

Note: For details on assigning kernels to HBM memory channels see Mapping Kernel Ports to Memory.
Table 1. Available Memory Resources per SLR
Resources SLR 0 SLR 1 SLR 2
HBM memory channel (system port name) HBM[0:31] (16 GB) No connections No connections
PLRAM memory channels (system port name) PLRAM[0:1] (128K per instance) PLRAM[2:3] (128K per instance) PLRAM[4:5] (128K per instance)
Host memory channels (system port name) No connections No connections HOST[0] 16 GB on host


The platform provides a 300 MHz default clock to run the accelerator.

Available Resources After Platform Installation

The following table lists the available resources in the dynamic region of each SLR. It represents the total device resources after subtracting those used by the static region.

Table 2. xilinx_u55c_gen3x16_xdma_3_202210_1 Platform Resource Availability per SLR
Block RAM tile 600 576 600
CLB LUT 386880 364320 395040
CLB Register 773760 728640 790080
DSP 2664 2784 2928
UltraRAM 320 320 320

Deployment Platform Installation

To run applications with this platform, download the deployment installation packages corresponding to your OS listed in the following table. Then, use the installation procedures described in Alveo U55C Data Center Accelerator Card Installation Guide (UG1468).

Accelerated applications have software dependencies. Work with your accelerated application provider to determine which XRT version to install.

Development Platform Installation

For developing applications for use with the Alveo Data Center accelerator cards you must install and use the Vitis software platform. To set up an accelerator card for use in the development environment, follow the installation steps in: