Equipped with MCU_STM32F103C8T6, allowing normal operation without a program. AD1938_CODEC decoder board includes a single-chip board for soft control. Supports adjustable sampling rate and audio interface type. SPI communication mode links USBi terminal to ADAU1452 dsp board in a straightforward manner. I2C communication mode and additional details about the SIP1 jumper functionality are included. The version of the DSP board is equipped with MCU_STM32F103C8T6 (In view of the recent chip boom, there is no patch on the actual shipment board, the MCU itself has no program, and the board can still work normally without it.). The SIP1 on the target board is basically useless as a self-starting jumper. It is not necessary to cancel the self-starting at all, so you can throw away the jumper cap and do not plug it into the 12 terminal. Color: As Shown Material: ABS Package Contents: 1*DSP Development Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.