The Microchip PCI11010C is a single-chip PCIe switch with an integrated Ethernet MAC and programmable I/O. The integrated PCIe physical interfaces provide a 2-lane (2x8GT/s) upstream port and a 1-lane (1x8GT/s) downstream port. The device is targeted to address the need for higher bandwidth PCIe sub-systems within embedded applications. PCIe upstream can be delivered across a single or multiple lanes to accommodate best system architecture. Support is included to enable cabled and optical PCIe links using SRNS & SRIS. Timing coherence is maintained across PCIe using PTM, Precision Time Measurement. The PCI11010C also includes an IEEE 802.3 compliant 2.5Gbps Ethernet MAC. The integrated RMII, RGMII and SGMII+ interfaces support 10/100/1000Mbps and 2.5Gbps operation. A programmable pin multiplexer is used to map I/O functions to package pins. This enables designers to work with either a default configuration or modify signals to best fit their application. Example signals include those associated with USB operation, through to GPIO or SMBus, which are accessed via a dedicated PCIe Endpoint Controller.