“In recent years, with the continuous iteration of Bluetooth technology, wireless earphones have become a trend-setter in the new era. But not all headphones are suitable for “wireless”. In some timely confrontation game scenarios that have strict requirements on audio-visual delay, users said that using Bluetooth headphones is prone to long sound delay, resulting in the phenomenon of audio and video out of sync , so that it can not meet the ever-changing situation in the game situation.
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On March 9, 2022, Dalian General Holdings, a leading semiconductor component distributor dedicated to the Asia-Pacific market, announced that its subsidiary World Peace has launched a USB headset solution based on Artery AT32F403A MCU.
Figure 1 – The Display board of the Artery-based USB headset solution of the United Nations General Assembly
In recent years, with the continuous iteration of Bluetooth technology, wireless earphones have become a trend-setter in the new era. But not all headphones are suitable for “wireless”. In some timely confrontation game scenarios that have strict requirements on audio-visual delay, users said that using Bluetooth headphones is prone to long sound delay, resulting in the phenomenon of audio and video out of sync , so that it can not meet the ever-changing situation in the game situation. Therefore, compared to Bluetooth transmission, game enthusiasts are more willing to choose the “wired” method to suit practical application scenarios. Based on Artery AT32F403A MCU, the USB headphone solution launched by Dalianda Shiping can reduce the distortion caused by computer boards, provide better and clearer sound effects, and also have better compatibility.
Figure 2-Scenario application diagram of the Artery-based USB headset solution of Dalian and World Peace
Founded in 2016, Artery is a chip (MCU) design company dedicated to promoting innovation in 32-bit microcontrollers. It was recognized as a high-tech enterprise in 2019. Arteli focuses on ARM®Cortex®-M4/M0+ 32-bit microcontroller R&D and innovation, with R&D branches in Taiwan and Jiangsu, and sales and technical support branches in Shenzhen. The AT32F403A used in this solution is a high-performance MCU under Artery, which is equipped with a 32-bit ARM®Cortex®-M4 core, with 55nm advanced process, effectively improve the overall performance, can achieve up to 240MHz operation speed.
In addition to integrating high-performance computing performance, AT32F403A also has built-in single-precision floating-point unit (FPU) and digital signal processor (DSP), and it has rich peripherals and flexible clock control mechanism, which can meet the application in various fields . Not only that, the product also has a complete USB sample program, which not only has a highly flexible and flexible customized product, but also meets the needs of current customers.
Figure 3 – The block diagram of the Artery-based USB headset solution of Dalian and Worldping
In this solution, the AT32F403A is connected to the computer through USB Audio Class, and the2S controls the WM8988 Audio codec to realize the complete USB headset function, which can eventually reach 16K/48K/96K audio sampling rate, and supports sampling rate switching, mute, volume adjustment, Feedback and other functions.
Core technical advantages:
• Support 16K/48K/96K audio sampling rate;
• Support 16bit sampling;
• Support sampling rate switching;
• Support mute;
• Support volume adjustment;
• Support Feedback.
Program Specifications:
• Core: ARM 32-bit Cortex-M4F CPU and FPU;
• Working voltage: 2.7V~5.5V;
• 240MHz maximum frequency, with memory protection unit;
• 256~1024KB Flash, 96 + 128KB SRAM;
• Built-in 48MHz factory calibrated RC (1% accuracy at TA = 25˚C, 2% accuracy at TA = -40˚C to +105˚C) with automatic clock calibration (ACC) function;
• Built-in 40kHz RC oscillator;
• 3 x 12-bit, 0.5µs A/D converters (up to 16 channels);
• 2 12-bit D/A converters;
• 14-channel DMA controller;
• Up to 80 fast I/Os;
• Up to 17 timers;
• Support Compact Flash, SRAM, PSRAM, NOR and NAND memory;
• Support LCD parallel interface, 8080/6800 mode;
• 3 x I2C, 8 x USART, 4 x SPI, 2 x CAN, 2 x SDIO, USB 2.0 FS;
• Temperature: -40˚C ~ 105˚C;
• Packages: QFN48, LQFP48, LQFP64, LQFP100.
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