# DC-SCM LVDS Tunneling Protocol and Interface

## Description

The Lattice Semiconductor DC-SCM LVDS Tunneling Protocol and Interface (LTPI) IP Core is an Open Computer Project (OCP) Data Center – Secure Control Module (DC-SCM) Standards compatible solution which is introduced in the DC-SCM 2.1 Specification. LTPI is a protocol and interface designed for tunneling various low-speed signals between Host Processor Module (HPM) and Secure Control Module (SCM). The LTPI protocol goes over the LVDS (Low Voltage Differential Signals) electrical interfaces supported by majority of the CPLDs and FPGAs. This is the next generation protocol for DC-SCM 2.1 that serves as a replacement for two Serial GPIO (SGPIO) interfaces. The LVDS interface provides higher bandwidth and better scalability than the SGPIO interface. It allows for tunneling of not only GPIOs but also low speed serial interfaces such as I2C and UART. It is also extensible with additional proprietary OEM interfaces and provides support for raw Data tunneling between HPM and SCM CPLDs. It also provides a solution for minimal wire connection between two FPGAs.

Dual Node LTPI support one SCM with two HPM.

## Devices Supported

MachXO3L, MachXO3LF, MachXO3D, Mach-NX, MachXO5-NX

## References

- User Guide

## Revision History

3.0.0 | initial release.