KT404A is a provider of serial voice chip, perfectly integrated hardware decode MP3, WAV, WMA' s. At the same driver software supports TF card, support for FAT16, FAT32 file system. Can be done through simple serial commands to play specific music, as well as how to play music and other functions, without the cumbersome underlying operating, easy to use, stable and reliable is the most important feature of this product.

KT404A方案参考原理图V1.2.pdf

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