Sun Enterprise 220R Server Service Manual

C.1.2.3 PCIO ASIC

The PCI-to-EBus/Ethernet controller (PCIO) ASIC bridges the PCI bus to the EBus, enabling communication between the PCI bus and all miscellaneous I/O functions, as well as the connection to slower on-board functions. The PCIO ASIC also embeds the Ethernet controller.