# SWD interface device connected to the SOC

**Minimum connection SWD interface**

The full name of the SWD interface Serial Wire Debug, which compared to traditional cable JTAG interface of the biggest advantages is the use of fewer, more stable. If you do not consider the VCC supply, then only one CLOCK, a DATA IO line and a ground to achieve high-speed debugging and firmware programming. Minimum connection as shown below：

![](/files/-M2HX6phMKZ8_M8hkTJV)


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