Scheme Introduction
This Type-C earphone solution is a highly integrated TYPE-C interface audio module developed by Tianhui Micro. This scheme integrates DSP sound effect, anti howling, and built-in low noise microphone to prevent large and bias circuits. Integrated headphone power amplifier, no pop sound, no need for direct capacitance. This solution also includes audio head insertion check and microphone detection, integrated with OMTP and CTIA earphone automatic recognition functions, and automatic adaptation. This scheme has good compatibility, built-in FLASH, voltage range of 3.0V to 5.5V, and supports 4 configurable key inputs. Together with the Tianhui Micro Calfa wireless module, it can be configured as a wireless Type-C earphone solution

Program Features
1. Highly integrated attribute: integrated DSP; Headphone power amplifier; OMTP and CTIA earphone automatic recognition function
2. Anti howling; Virtual surround sound; 3D walk; Implement audio equalizer; Reverberation
Built-in low noise microphone prevents large and bias circuits.
4. Built-in FLASH to store information such as VID and PID; USB interface upgrade, UART interface upgrade
Configurable key input: Detects 4 keys on Android/Apple earphones, supports short press, long press, double click, three click, and other methods
6 2.4G wireless transmission mode: It can be upgraded to 2.4G wireless transmission audio scheme in cooperation with the Galfa scheme


Type-C Headset Scheme 2.4G Wireless Transmission Scheme Properties
2.400-2.483GHz ISM band/GFSK modulation
Supports 3Mbps RF audio data transmission
Support automatic frequency hopping of 26 channels
Supports 1-to-1, 1-to-6, and 1-to-many broadcast modes
Supports 48K Hz/16bit/dual channel high-quality audio sampling
Frequency response 20-20KHZ, performance-to-noise ratio 85db, distortion degree 0.5%
Supports bidirectional data transmission and control
The minimum delay time for audio data is 12.5 ms
Support for adjustable audio delay, suitable for surround speakers
Outdoor linear transmission distance greater than 50 meters
Reserved GPIO, UART, and I2S interfaces to support software online burning and resetting

Application site of Type-C earphone solution
·Type-C headphone adapter
·Type-C earphones/earphones
·USB microphone
·Type-C Game Headset
·Type-C phone sound card
·PC sound card
·Type-C Traffic Headset

The above corresponding scenarios can be customized for 2.4G wireless application transmission