JTAG and STM32 SWD Connection Method

If our board only has 4 interfaces: V3.3, SWDIO, SWDCLK, GND. Then the connection relationship with JTAG is shown in the figure below:

JTAG and STM32 SWD Connection Method

Pay attention to the direction of the notch. Then GND can be connected to any pin on the left (except for the bottom pin).

The 20-core to 4-core wire should be short; otherwise, high speed may cause errors.

A 20-core wire, with ground in the middle, can achieve high speed.

JTAG and STM32 SWD Connection Method

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