Introduction

The IS20xxS Mono Audio chip is a compact, highly integrated, CMOS single-chip RF and baseband Integrated Chip (IC) with Enhanced Data Rate (EDR) for 2.4 GHz applications. The IS20xxS Mono Audio chip is compliant with Bluetooth^® 4.1 specifications and completely backward-compatible with Bluetooth 3.0, 2.0 or 1.2 systems.

The IS20xxS Mono Audio chip incorporates Bluetooth 1/2/3 Mbps RF, single-cycle 8-bit MCU, TX/RX modem, 5-port memory controller, task/hopping controller, UART interface and Microchip’s Bluetooth software stack to achieve the required Bluetooth 4.1 specifications with EDR functions.

For voice and audio applications, the IS20xxS Mono Audio chip also integrates a Digital Signal Processor (DSP) co-processor, a PLL and a dedicated Codec to provide superior audio and voice quality. For the enhanced audio applications, SBC (Sub-band Coding)/AAC_LC (Advanced Audio Coding) decoding functions are also carried out by the DSP to satisfy the Bluetooth A2DP (Advanced Audio Distribution Profile) requirements.

For voice applications, basic Continuous Variable Slope Data (CVSD) encoding and decoding with enhanced noise reduction and echo cancellation are implemented by the built-in DSP to achieve better quality in both the sending and receiving sides.

Additionally, to minimize the external components required for portable devices, a battery voltage sensor, battery charger, a switching regulator and Low Dropout (LDO) are integrated to reduce system Bill of Materials (BOM) cost for various Bluetooth applications. A Mono 1-channel 2.3W Class-D Amplifier (CDA), which provides up to 100 dB Signal-to-noise Ratio (SNR), is also built-in to reduce the BOM cost and PCB area.