BCM20707 Preliminary Data Sheet
Collaborative Coexistence
Figure 3: LDO Functional Block Diagram
BCM20707 PMU
1.2V LDO
VBAT
VDDC_OUT
(VDDC_LDO)
2.5V LDO
VDD2P5
VDD2P5_OUT
(BTLDO2P5)
AVSS_GND
Collaborative Coexistence
The BCM20707 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.
Global Coexistence Interface
The BCM20707 supports the proprietary Broadcom Global Coexistence Interface (GCI) which is a 2-wire
interface.
The following key features are associated with the interface:
•
Enhanced coexistence data can be exchanged over GCI_SECI_IN and GCI_SECI_OUT a two-wire
interface, one serial input (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.
•
•
•
•
It supports generic UART communication between WLAN and Bluetooth devices.
To conserve power, it is disabled when inactive.
It supports automatic resynchronization upon waking from sleep mode.
It supports a baud rate of up to 4 Mbps.
SECI I/O
The BCM20707 devices have dedicated GCI_SECI_IN and GCI_SECI_OUT pins. The two pin functions can be
mapped to any of the Broadcom Global Coexistence 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.
Broadcom®
Bluetooth SoC
May 27, 2016 • 20707-DS206-R
Page 16
BROADCOM CONFIDENTIAL
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