Protection of SWD lines :: STM32L011

[D3jan]

Hello,

Is it recommended to implement an ESD protection on SWD lines of STM32L011D3/D4 mCU? I went through "Getting started with STM32L0xx hardware development" document and there is a Figure 15 which suggests to connect SWD lines direct to programming connector without any protections. I'm just thinking that some protection would be good, like 47R - 100R resistors on the lines with 3.3 V (or 5 V ?) Vrwm of ESD diodes while programmer would not be connected to the board?

Many thanks.

[TDK]

If you want more ESD protection that the chip already provides, you can add additional ESD diodes: