Document Number: 002-14790 Rev. *A

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CYW20706

3.7 Adaptive Frequency Hopping

The CYW20706 supports host channel classification and dynamic channel classification Adaptive Frequency Hopping

(AFH) schemes, as defined in the Bluetooth specification.

Host channel classification enables the host to set a predefined hopping map for the device to follow.

If dynamic channel classification is enabled, the device gathers link quality statistics on a channel-by-channel basis to facilitate channel

assessment and channel map selection. To provide a more accurate frequency hop map, link quality is determined using both RF and

baseband signal processing.

3.8 Collaborative Coexistence

The CYW20706 provides extensions and collaborative coexistence to the standard Bluetooth AFH for direct communication with

WLAN devices. Collaborative coexistence enables WLAN and Bluetooth to operate simultaneously in a single device. The device

supports industry-standard coexistence signaling, including 802.15.2, and supports Broadcom and third-party WLAN solutions.

3.9 Global Coexistence Interface

The CYW20706 support the proprietary Broadcom Global Coexistence Interface (GCI) which is a 2-wire interface.

The following key features are associated with the interface:

(GCI_SECI_IN), and one serial output (GCI_SECI_OUT). The pad configuration registers must be programmed to choose the digital

I/O pins that serve the GCI_SECI_IN and GCI_SECI_OUT function.

3.9.1 SECI I/O

The CYW20706 devices have dedicated GCI_SECI_IN and GCI_SECI_OUT pins. The two pin functions can be mapped to any of

the Broadcom Global Co-existence Interface (GCI) GPIO. Pin function mapping is controlled by the configuration file that is stored in

either NVRAM or downloaded directly into on-chip RAM from the host.