Bluetooth

6 Pages 1607 Words

requencies at 1 MHz intervals to give a high degree of interference immunity. RF output is specified as 0 dBm (1 mW) in the 10m-range version and -30 to +20 dBm (100 mW) in the longer-range version. When producing the radio specification, high emphasis was put on making a design enabling single-chip implementation in CMOS circuits, thereby reducing cost, power consumption and the chipsize required for implementation in mobile devices. Voice: Up to three simultaneous synchronous voice channels are used, or a channel which simultaneously supports asynchronous data and synchronous voice. Each voice channel supports a 64 kbps synchronous (voice) channel in each direction. Data: The asynchronous data channel can support maximal 723.2 kbps asymmetric (and still up to 57.6 kbps in the return direction), or 433.9 kbps symmetric. · a Master can share an asynchronous channel with up to 7 simultaneously active Slaves in a Piconet. · by swapping active and parked slaves out respectively in the piconet, 255 slaves can be virtually connected using the PM_ADDR and to park even more slaves the BD_ADDR can be used. Slaves can participate in different piconets and a master of one piconet can be the slave in another, this is known as a Scatternet. Up...