Critical I/O XGE4022-PMC-CC PMC Module

The Critical I/O XGE4022-PMC-CC is a PMC (PCI Mezzanine Card) module that implements a true hardware-based TCP/IP Offload Engine (TOE) for high-performance embedded and mission-critical systems. Unlike processor-based implementations, this module offloads the complete protocol stack—Ethernet, TCP, UDP, IP, iSCSI, and RDMA—into dedicated silicon, delivering sustained high throughput, maximum host offload, ultra-low latency in the microsecond range, and deterministic behavior essential for real-time applications. The dual-port copper configuration provides full-duplex wire-speed operation with up to 250 MBytes/sec per port and 500 MBytes/sec aggregate throughput. Features include zero-copy direct data placement, large send/receive offload, UDP streaming optimization, and hardware built-in test (BIT) for system diagnostics.

## Technical Specifications

• **Ethernet Interfaces:** Dual RJ45 ports, 1000Base-T (Gigabit Ethernet)
• **Throughput:** 250 MBytes/sec per port; 500 MBytes/sec dual-port aggregate sustained transfer rate
• **Latency:** Ultra-low latency to microsecond scale
• **Protocol Offload:** Full hardware stack—Ethernet, TCP, UDP, IP, iSCSI, RDMA
• **Data Path:** Zero-copy direct data placement to application memory
• **Offload Capabilities:** Large send/receive offload, UDP streaming, silicon-based stack processing
• **Built-in Test:** Hardware BIT for diagnostics
• **Architecture:** Programmable design with optional protocol customization

## Key Features

• Full line-rate wire-speed throughput on Gigabit Ethernet ports
• Hardware TCP/IP offload eliminates host processor protocol overhead
• Deterministic behavior for time-critical operations
• 100% standard Ethernet compatibility
• Dual full-duplex port operation

## Typical Applications

• Industrial embedded systems requiring deterministic performance
• Mission-critical data transfer and network fabric applications
• High-throughput UDP streaming
• iSCSI and RDMA-based storage and compute acceleration
• Real-time systems demanding microsecond-scale latency

## Compatibility & Integration

The XGE4022-PMC-CC integrates as a standard PCI Mezzanine Card into compatible host systems. The programmable architecture supports optional protocol customization for application-specific requirements.