Compiler-Precautions for IAR configuration when MCU runs at 32 kHz

When the MCU clock speed is switched to 32 kHz, IAR can download the Code but cannot debug it. the following error occurs.

It indicates that the IAR cannot establish a connection with the target MCU. The specific cause is that the communication speed of SWD is much higher than the MCU clock speed, which leads to communication failure.

IAR can be debugged in this case, but you need to change the following:

Options-> J-Link/J-Trace-> Setup-> JTAG/SWD speed-> Fixed 32Hz. The default value is Auto 32 KHz. As shown in: