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Overview

SmartDV’s Ethernet 400G PCS IP is an FPGA-proven, fully featured Physical Coding Sublayer solution purpose-built for SoC designs requiring the highest available Ethernet bandwidth across AI accelerator, hyperscale data center, and high-performance networking applications. Fully compliant with IEEE 802.3-2022 Clause 119, it delivers complete 400GBASE-R, 400GBASE-KR4, 400GBASE-KR8, and 400GBASE-KR16 PCS functionality with 64b/66b encoding and decoding across the full PCS to PMA service interface for backplane, copper, and optical configurations.

Designed to address the demanding signal integrity and error correction requirements of modern hyperscale AI and data center interconnects, the IP implements complete block synchronization, alignment marker insertion and removal, PCS lane deskew and reordering, gearbox functionality for various data widths, per-lane BIP-8 insertion and checking for bit error rate monitoring, and RS-FEC per IEEE 802.3-2022 Clause 91 using the RS(544,514) code with dedicated error correction and detection capability across the full 400G lane structure. Its loopback functionality, receiver link fault status detection, and IEEE 802.3az Energy Efficient Ethernet support give hyperscale AI SoC teams a production-tested, spec-complete 400G PCS implementation for the most demanding data center fabric designs.

Built for design flexibility and silicon efficiency, the IP core is highly configurable for both ASIC and FPGA implementations, with a strong focus on area optimization, power management, and peak performance. Its parameterized PMA interface architecture and clean host interface enable fast integration across a wide range of data center process nodes.

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Ethernet 400G PCS
Key Features
  • Full 400G PCS Functionality – Complete PCS implementation per IEEE 802.3-2022 Clause 119 supporting 400GBASE-R, 400GBASE-KR4, 400GBASE-KR8, and 400GBASE-KR16 configurations
  • 64b/66b Encoding and Decoding – Complete 64b/66b line encoding and decoding for both transmit and receive paths with data scrambling and descrambling
  • Block Synchronization and Alignment – Complete block synchronization, alignment marker insertion and removal, and PCS lane deskew and reordering
  • RS-FEC Support – RS-FEC per IEEE 802.3-2022 Clause 91 using RS(544,514) code with dedicated error correction and error detection capability
  • BIP-8 Error Monitoring – Per-lane BIP-8 insertion on transmit path and checking on receive path with bit error rate monitoring
  • Gearbox Functionality – Configurable gearbox for various data widths for flexible PMA interface support
  • Flexible PMA Interface – 32-bit and 40-bit PMA interface data width support for broad SerDes compatibility
  • Loopback and Link Fault Detection – Complete loopback functionality with receiver link fault status detection for design validation and system diagnostics
  • Energy Efficient Ethernet Support – IEEE 802.3az EEE support for power-efficient data center switch and NIC operation
  • Test Pattern Generation – Programmable PRBS31 and PRBS9 test pattern generation and checking for physical layer validation
Compliance and Compatibility
  • Compliant with IEEE 802.3-2022 Clause 119 for 400GBASE-R, 400GBASE-KR4, 400GBASE-KR8, and 400GBASE-KR16
  • Compliant with IEEE 802.3-2022 Clause 91 RS-FEC using RS(544,514)
  • Compliant with IEEE 802.3az Energy Efficient Ethernet
  • Configurable SoC interface supporting AMBA AXI, AHB, APB, and custom wrappers for seamless integration
  • Compatible with ASIC and FPGA design flows across leading foundry process nodes
  • Compatible with all major EDA synthesis, simulation, and linting flows

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