The CS5530A I/O companion is designed to work in conjunction with a GX-series processor (i.e., GX1, GXLV, GXm); all members of the National Semiconductor GeodeTM family of products. Together, the Geode processor and CS5530A provide a system-level solution well suited for the high performance needs of a host of devices which include digital set-top boxes and thin client devices. Due to the low power consumption of the GX-series processors, this solution satisfies the needs of battery powered devices such as National's WebPADTM system, and thermal design is eased allowing for fanless system design.