SDI to MIPI CSI-2 Bridge Hardware Design

Copyright (c) 2020-2023 Antmicro

Overview

This project contains open hardware KiCad design files for Antmicro's SDI to MIPI CSI-2 bridge. This device enables connecting industrial and filmmaking cameras and video accessories to edge AI platforms which often include the MIPI CSI-2 interface.

The board includes an SDI input BNC connector and Antmicro's standard 50-pin FFC output connector (compatible with a range of our open hardware boards) exposing MIPI CSI-2 lanes as well as an I2C bus for configuration.

An additional SDI output (loopback) BNC connector is also available.

SDI signal conversion is implemented with a Semtech GS2971A deserializer which passes the parrallel 10-bit video data to the Lattice CrossLink LIF-MD6000-6KMG80I. The CrossLink FPGA includes programmable logic and dedicated MIPI D-PHY transceivers. It can be configured to accept parallel video data from the deserializer and transmit it over MIPI CSI-2 to the host platform. SPI and I2C programming interfaces are exposed so the deserializer and the CrossLink FPGA can be configured from the host platform.

Project structure

The main directory contains KiCad PCB project files, a LICENSE and README. The remaining files are stored in the following directories:

• lib - contains the component libraries
• doc - contains board schematic in PDF
• img - contains graphics for this README

Key Features

• Implements Single Link (3G-SDI) video conversion
• Supports SMPTE ST 425 (Level A and Level B), SMPTE ST 424, SMPTE ST 292, SMPTE ST 259-C and DVB-ASI as defined by the Semtec GS2971A specification
• Integrated loopback BNC connector for easy daisy-chaining with multiple SDI video accessories
• Audio de-embedder for 8 channels of 48kHz audio exposed on I2S 10 pin header
• Two 4-lane MIPI CSI-2 interfaces with up to 6 Gbps, each exposed on the 50 pin FFC connector.
• I2C configuration interface to handle CrossLink FPGA and SDI deserializer