LVDS Tunneling Protocol and Interface Reference Design

Multiple Solution Compliant with DC-SCM and Aggregate Multiple Data Channel

The DC-SCM 2.0 LTPI Reference Design provides multiple solution templates that use the current LVDS Tunneling Protocol Interface (LTPI) IP. The IP is compliant with Datacenter-ready Secure Control Module (DC-SCM) 2.0 LTPI specifications with a standardized Datacenter-ready Secure Control Interface (DC-SCI). This IP aggregates multiple data channels such as I2C, GPIO, and UART to add more flexibility to a customer’s system and board design.

One of the significant changes in the DC-SCM 2.0 specification is the introduction of Low-voltage differential signaling Tunneling Protocol & Interface (LTPI). The LTPI addresses shortcomings of the Serial GPIO interface used in DC-SCM 1.0.

Support I2C Interface – For I2C Interface, each can be configured as Controller or Target. It can also support multi-slave on the controller side.


  • Compliant with DC-SCM Protocol Specifications 2.0 (LTPI version 1.4.3)
  • Supports Link initialization, discovery, and negotiation
  • Supports Multi-channel Serial Interface and LVDS
  • Supports up to five channels aggregation/disaggregation in total
  • Supports AMBA 3 APB Protocol version 1.0 for register access of the soft IP and data channel

Jump to

Block Diagram

Resource Utilization

Design Module LUT4 PFU Registers EBR
Diamond Demo SCM 2535 2527 6
HPM 2369 2210 6
Lattice Radiant Demo SCM 2991 2386 3
HPM 3251 2319 3


Technical Resources
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LVDS Tunneling Protocol and Interface Reference Design - Source Code
7/5/2023 ZIP 324.8 MB
LVDS Tunneling Protocol and Interface Reference Design - User Guide
FPGA-RD-02247 1.2 6/28/2023 PDF 3.4 MB

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