General Description
The RT8763B series are single-chip Bluetooth ROM audio solutions for mono (RTL8763BM) and stereo (RTL8763BF/BFR, RTL8763BS, RTL8763BA) applications. The RT8763B is composed of an ARM core and an ultra-low power DSP core with high efficiency computing power, high performance audio codec, power management unit, ADC, ultra-low current RF transceiver, and smart I/O distribution controller.
The parameter configuration tools, the EVB kits, and the MP kits, including controller hardware and software, provide a simple and flexible procedure for customers to quickly design and proceed to mass production with Realtek’s new generation of audio solutions. These complete total solutions provide a fast and highly reliable development path with a very competitive R-BOM.
Features
General
- Bluetooth 5 specification compatible
- Supports HFP 1.7, HSP 1.2, A2DP 1.3, AVRCP 1.6, SPP 1.2 and PBAP 1.0
- Single-end RF radio output with high performance 10dBm of transmitter power and -94dBm 2M EDR receiver sensitivity
- Supports Bluetooth classic (BDR/EDR)
- Supports Bluetooth Low Energy (BLE)
- Generic access service
- Device information service
- Proprietary services for data communication
- Apple Notification Center Service (ANCS)
- Real Wireless Stereo (RWS)
- Supports USB type-C audio
- Supports iAP2
- Realtek’s latest RCV (Real Clear Voice) technology for narrowband and wideband voice connection, including wind noise reduction
- Supports high resolution audio codec up to 24bits, 192kHz audio data format
- Supports dual analog and digital MIC, AUX-IN, I2S digital audio, analog output
- Supports high speed UART, I2C, SPI and USB2.0 compatible interface
- Supports high resolution 12-bits multi-channel ADC
- Supports PWM I/O and smart LED controller
- Supports USB BC1.2 battery charging
- Smart I/O distribution scheme with MUX
- Built-in 8Mbits FLASH memory (RTL8763BF/RTL8763BFR)
- Integrated dual switch mode power regulator, linear regulators, and battery charger; charging current up to 400mA
- Built-in battery voltage monitoring and thermal protection scheme with external thermal resistor
- SBC, AAC decoder support
- Package: 5x5mm2 QFN40 (RTL8763BM, RTL8763BF, RTL8763BFR), 6x6mm2 QFN48 (RTL8763BS) and 8x8mm2 QFN68 (RTL8763BA) with 0.4mm pitch
- Supports OTA and USB firmware upgrade
- GSM 217Hz interference block out design
- Low BOM cost
- Green (RoHS compliant and no antimony or halogenated flame retardants)
- Supports PTA (Packet Traffic Arbiter) when co-existing with Wi-Fi
Baseband Features
- 40MHz main clock
- Supports serial flash for FW storage and parameter upgrade
- Adaptive Frequency Hopping (AFH)
- Multi-link support
- Supports Serial Copy Management System (SCMS-T) content protection
RAM and ROM Size
- ROM size 768KB
- MCU RAM size 16KB x 8 Data RAM + 8KB X 2 cache RAM
- DSP RAM 8KB x 22
RF
- Supports TX +10dBm (typ.) maximum output power for Bluetooth classic
- Supports TX +10dBm (typ.) maximum output power for Bluetooth BLE
- Supports TX +4dBm (typ.) maximum output power for Bluetooth BLE low power TPM mode
- Receive sensitivity: -94dBm (2Mbps EDR)
- Receive sensitivity: -97dBm (BLE)
- Receiver sensitivity: -106.5dBm (125K BLE long range)
- Single-end TX/RX RF port without matching component required (when TX power is below +4dBm and using PIFA type PCB antenna)
- Crystal oscillator with built-in integrated capacitor for clock offset digital tuning (0~20pF), could save 2-compensation CL cap following Realtek design guidelines
MCU
- 32-bit ARM Cortex-M4F Processor
- Supports hardware Floating Point Unit (FPU)
- Supports Memory Protect Unit (MPU)
- Supports SWD debug interface
- Executed external SPI flash
- 4-way association cache controller
DSP Audio Processing
- Enhanced Tensilica Hi-Fi-mini compatible 24-bit DSP core
- 2 single-cycle MACs: 24 x 24-bit multiplier and 56-bit accumulator
- Supports G.711 A-Law, µ-Law, continuous-variable-slope-delta (CVSD) and mSBC voice codecs
- Supports 8/16 kHz 1/2-mic noise suppression and echo cancellation
- Packet Loss Concealment (PLC) for voice processing
- SBC, and AAC-LC audio codecs supported for BT audio streaming
Audio Codec
- Dual operation voltage range 2.8V and 1.8V
- Supports cap-less, single-ended, and differential mode at the DAC path
- Supports 16ohm and 32ohm speaker loading
- Stereo 24-bit digital-to-analog (DAC) with 102dBA SNR
- Stereo 24-bit analog-to-digital (ADC) with 97dBA SNR
- 5-band configurable EQ at both DAC/ADC paths
- Sampling rates of 8, 16, 32, 44.1, 48, 88.2, and 96kHz are supported.
- Built-in MIC bias generator
Digital Audio Interface
- Supports two PDM digital MIC inputs
- Supports 24-bit, 192kHz on I2S digital audio
- Sampling frequency 8/16/32/44.1/48/88.2/96/176.4/192kHz
Radio
- Compatible with Bluetooth Core Specification including BR/EDR/LE-1M/LE-2M/LE-Coded (Long Range)
- Fully integrated balun and synthesizer minimizes external components.
- RF circuit design minimizes power-consumption while keeping excellent performance
PMU
- Highly integrated PMU design for the system application
- Dual switching mode regulator for digital core, radio and audio codec respectively
- Built-in LDO for the I/O and FLASH memory
- Built-in Li-Ion battery charger with up to 400mA charger current capability
- Supports ambient thermal detection to detect the battery temperature
- Built-in OVP, OCP, UVP protection to protect the system.
Operating Condition
- Operating voltage: 2.8V to 4.35V (VBAT)
- Temperature range: -20°C to +70°C
Package
- 5mmx5mm, QFN40 package (RTL8763BM)
- 5mmx5mm, QFN40 package (RTL8763BF/BFR)
- 6mmx6mm, QFN48 package (RTL8763BS)
- 8mmx8mm, QFN68 package (RTL8763BA)
Applications
- Mono headset
- Stereo headset
- Real Wireless Stereo (RWS) headset
- Mono speaker
- Stereo speaker
