The SiW3000 UltimateBlueTM Radio Processor is a recent innovation for Bluetooth wireless technology. It combines the industry's best performing and most highly integrated radio design with an ARMTDMI processor using CMOS technology. The SiW3000 uses direct conversion (zero-IF) architecture. This allows digital filtering for excellent interference rejection as compared to low IF solutions and also results in fewer spurious responses. The lower-layer protocol stack software is integrated into the on-chip ROM. Optional external Flash memory is also supported. The SiW3000 is compliant with Bluetooth specification 1.2 features. The device is available in multiple packages and bare die form with a guaranteed operating temperature range from -40C to +85C and an extended high temperature range to +105C.