PineBuds Pro

The PineBuds Pro

The PineBuds Pro are free and open source ANC TWS Earbuds capable of running custom-built open operating systems. Some of the notable features include their light weight, 3 Microphones, ANC (Active Noise Cancellation), ENC (Environment Noise Cancellation) and high fidelity 6mm speaker. It is a fully community-driven side-project which anyone can contribute to, allowing you to keep control of your device.

Software releases

SDK Release

• • PineBuds Pro "Little Whale" SDK date:20221128

SoC and Memory Specification

• Based on BES 2300YP

SoC Architecture

• CPU Features:
  • Dual-core ARM Cortex-M4F Processor Processor up to 300MHz CPU

• • CMOS Single-chip Fully-integrated RF, PMU, Audio CODEC and Cortex-M4F CPU
  • 4MB Serial Flash On-chip for Custom Program
  • Internal ROM 448KB for critical constants and code
  • Internal SRAM 992KB for critical data and code
• BT Features:
  • Bluetooth 5.2 dual-mode compliant
• Audio Features:
  • Support BES Intelligent Bluetooth Retransmission (IBRT)
  • Support FF/Hybrid ANC
  • Dual MICs noise reduction
  • Echo Cancellation
  • Support low power voice activity detection
  • Multi-band EQ and Bass enhancement
  • Support Active Crossover
  • Support TWS
  • HiFi Stereo Audio DAC: 120dB SNR, 110dB DNR
  • HiFi Stereo Audio ADC: 100dB SNR

²* Sample rates from 8 kHz to 384 kHz

• • Support dual/single Mic noise suppression
  • Support ambient awareness
  • Support talk through
  • 24-bit audio processing
• PMU Features
  • 3.1V-5.5V Input for VBAT
  • Internal LPO for low power mode.
  • DCXO with internal oscillator circuit
  • Internal temperature sensor

Information, Schematics and Certifications

• Charging Case with two Left and Right earbuds
• Input Power: DC 5V @ 0.5A USB Type-C
• Document:
  • PineBuds Pro User Manual
• Schematic:
  • PineBuds Pro Earbuds Schematic 20220817
  • PineBuds Pro Charging Case Schematic 20220915
• Certifications:
  • Not yet available

Datasheets for Components and Peripherals

• BES 2300YP SoC information:
  • BES 2300-YP Datasheet V1.0
• Charging Case:
  • ThinkPlus Semi SY8821 Datasheet in Chinese
  • WCH Tech CH342DS USB to Dual Serial ports chip Datasheet
  • COPO CP2021 2.5W Qi Wire Power Receiver Datasheet(noted: not staffed)
• EarBuds:
  • ChiPower Tech CE3156 Single Cell Charger Datasheet
  • LowPower Semi LP3992 LDO Regulator Datasheet
  • HLW Semi HLW-YHX190 OTP micro Datasheet in Chinese (noted: for power-on and reset control)
  • Tontek TTP-233D one key touch pad detect IC Datasheet