BCM4356XKWBGT Datasheet, PDF (65/195 Pages) Cypress Semiconductor – Single-Chip 5G WiFi IEEE 802.11ac 2×2 MAC/ Baseband/Radio with Integrated Bluetooth 4.1, FM Receiver, and Wireless Charging

BCM4356 Advance Data Sheet
Audio Features
Audio Features
A number of features are implemented in the BCM4356 to provide the best possible audio experience for the
user.
• Mono/Stereo Blend or Switch: The BCM4356 provides automatic control of the stereo or mono settings
based on the FM signal carrier-to-noise ratio (C/N). This feature is used to maintain the best possible audio
SNR based on the FM channel condition. Two modes of operation are supported:
– Blend: In this mode, fine control of stereo separation is used to achieve optimal audio quality over a
wide range of input C/N. The amount of separation is fully programmable. In Figure 24, the separation is
programmed to maintain a minimum 50 dB SNR across the blend range.
– Extended blend: In this mode, stereo separation is maximized across a wide range of input CNR.
Broadcom static suppression typically gives a static-free user experience to within 3 dB of ultimate
sensitivity.
Figure 24: Example Blend/Switch Usage
– Switch: In this mode, the audio switches from full stereo to full mono at a predetermined level to
maintain optimal audio quality. The stereo-to-mono switch point and the mono-to-stereo switch points
are fully programmable to provide the desired amount of audio SNR. In Figure 25, the switch point is
programmed to switch to mono to maintain a 40 dB SNR.
Broadcom^®
May 8, 2015 • 4356-DS103-R
BROADCOM CONFIDENTIAL
Page 64