Intel® FPGA Complete SerialLite II Solution

The Intel FPGA SerialLite II solution enables easy, high-speed serial protocol implementation, which reduces design risk, shortens development times and allows you to concentrate on the core functions of your system design.

SerialLite II is Intel's second-generation lightweight serial interconnect protocol for a wide array of chip-to-chip, board-to-board, and backplane applications. SerialLite II builds on the success of SerialLite, extending the performance range from 622 Mbps to 102 Gbps, and reducing the logic requirements by an average of 60 percent, to deliver the lowest-cost serial interconnect solution.

Table 1 provides an overview of the complete SerialLite II interconnect solution.

Table 1. Complete SerialLite II Solution



Device Family

Physical Interface

Integrated PHY providing full PMA (1) and PCS (2) support

SerialLite II IP Core

Intel FPGA SerialLite II IP Core ›

Development Board

Characterization Report

Stratix II GX Characterization Report
Contact your local sales representative ›

Reference Design

SerialLite II Loopback Reference Design, available with IP

  1. PMA = physical medium attachment
  2. PCS = physical coding sublayer

Technology Background

The SerialLite II protocol, like its predecessor, is defined as a lightweight point-to-point serial interconnect with low protocol overhead, minimal data transfer latency, and a range of optional features to minimize logic requirements for the most cost-effective implementations.

SerialLite defined a full-duplex protocol based on a 16-bit datapath width (per lane), which resulted in minimal logic consumption for applications requiring symmetrical (transmit and receive) lane widths with lane rates from 1.6 to 3.125 Gbps.

SerialLite II builds on the success of SerialLite with optimized support for simplex, asymmetric, and broadcast data flows, and extended scalability with optional datapath widths (8, 16, or 32 bit per lane) for optimal implementations of lane rates below 1.5 Gbps and up to 6.375 Gbps.

Table 2 summarizes the key features and benefits of the SerialLite II protocol.

Table 2. Features and Benefits of SerialLite II




Data Flow

Full-duplex, simplex, asymmetric, or broadcast

Reduced logic for simplex, asymmetric, or broadcast applications

Data Type

Packet or streaming

Support for a variety of applications

Link Width

1 to 16 lanes

Scalable link throughput from 622 Mbps to 102 Gbps in each direction

Lane Rate

622 Mbps to 6.375 Gbps

Datapath Width

8 bits, 16 bits, or 32 bits
(per lane)

Reduced logic for lane rates below 1.5 Gbps and scalability to 6.375-Gbps lane rates



Industry-standard encoding for the most reliable clock and data recovery


Payload and idle, or none

Reduced EMI for high lane rates

Reference Clock

Asynchronous or synchronous

Suitable for chip-to-chip, board-to-board, and backplane applications

Polarity Reversal

Yes or no

Implement the functionality required for your specific application for a cost-optimized solution

Data Integrity Protection

CRC-32, CRC-16, or none

Packet Type

Data, priority, or both

Optional logic to insert high-priority data or control information

Flow Control

Data packet, priority packet, both, or none

Implement the functionality required for your specific application for a cost-optimized solution


Priority packet or none

Increased link reliability

Channel Multiplexing

Yes or no

Support for applications with multiple logical channels

Atlantic Interface

Data and priority ports

Well-defined interface to user logic and a variety of Intel FPGA IP functions to accelerate design cycles for unique bridging solutions

Hardware Testing

To ensure the highest reliability, Intel FPGA SerialLite II solutions are extensively tested in hardware. The SerialLite II Intel FPGA IP function (v.1.0.0) has been tested on dual Stratix GX development boards in a range of configurations, including all of the data flow options, packet and streaming data, a variety of link widths, and lane rates up to 3.125 Gbps. The tests were conducted both with and without optional features enabled, such as data integrity protection, data and priority packets, flow control, and retry-on-error.