Dear Team, I hope you are doing well. I have some queries regarding the **CM6535 Demo Board.** ### **Issues Faced:** 1. **I2C Communication Issue:** * I am unable to communicate with the **CM6535 over I2C**. * There is **no response** from the address mentioned in the datasheet, nor does the I2C scan tool detect the CODEC’s address. * Could you confirm if a **specific GPIO pin needs to be set high/low** to configure the CODEC as a master/slave before initiating I2C communication? 2. **I2S Data Issue:** * When playing audio from my phone while the **CODEC is connected**, I do not receive any data over the **I2S bus**. * Is there a **GUI tool or any configuration step required** to enable I2S functionality? We are currently stuck in the development process due to these issues, and your support would be highly appreciated. Looking forward to your guidance. **Kind regards,** Akshay Mehrotra

Dear Team, I hope you are doing well. I have some queries regarding the **CM6535 Demo Board.** ### **Issues Faced:** 1. **I2C Communication Issue:** * I am unable to communicate with the **CM6535 over I2C**. * There is **no response** from the address mentioned in the datasheet, nor does the I2C scan tool detect the CODEC’s address. * Could you confirm if a **specific GPIO pin needs to be set high/low** to configure the CODEC as a master/slave before initiating I2C communication? 2. **I2S Data Issue:** * When playing audio from my phone while the **CODEC is connected**, I do not receive any data over the **I2S bus**. * Is there a **GUI tool or any configuration step required** to enable I2S functionality? We are currently stuck in the development process due to these issues, and your support would be highly appreciated. Looking forward to your guidance. **Kind regards,** Akshay Mehrotra

Hi Cmedia Team, I am using the **CM6535 Demo Board** for my project, where I plan to utilize its **USB Audio Stack** to fetch audio call data from a mobile device via USB and transmit it over I2S. I have a few queries regarding the **CM6535 codec IC**: 1. When integrating CM6535 into my custom hardware, will I need to add any **additional software USB stack** or hardware, or will USB audio be detected automatically (similar to how a mobile phone detects it)? 2. While the demo board successfully plays audio from the mobile device, it is unable to **record or send voice data** from an external microphone back to the phone. Could you advise on potential causes or required configurations to enable this functionality? Looking forward to your guidance. Kind regards, Akshay Mehrotra