BCM2040

The BCM2040 is a major breakthrough in the design of low-cost Bluetooth mouse and keyboard devices. The BCM2040 is a true single chip that integrates the entire profile, application, and Bluetooth protocol stack and is fully compliant with the Bluetooth SIG specification for human interface devices.

The BCM2040 is fully compliant with the version 1.2 Bluetooth specification, including adaptive frequency hopping and fast connection, which are essential to mouse and keyboard applications in personal computers. Integration is key to achieving the system cost targets of today's PC OEMs. By integrating all components within today's mouse and keyboard into the BCM2040, low system costs can be achieved to approach the price points of legacy-wired mice and keyboards.

The BCM2040 can interface directly to mouse optical or ball encoders and keyboard scan matrices.The BCM2040 baseband core has been optimized to maximize the battery life and functionality required for a mouse or keyboard application. Battery life has been optimized in the BCM2040 to meet greater than 6 months for the typical user using standard battery technology.

The BCM2040 integrates a high-performance radio implemented in standard bulk CMOS. BCM2040 incorporates a proprietary self-calibrating VCO structure for both excellent phase noise and fast frequency hopping covering the entire band. All filters have been fully integrated into the device and are also self-calibrating to automatically compensate for changes in temperature and any process variation during manufacturing.

The RF interface to the device fully integrates the T/R switch and its associates matching circuits, enabling direct interface with the antenna. The block diagrams show how the BCM2040 can be used in either a mouse or keyboard application.