I'm having problems to program a KL05z . The board has only a 3.3v regulator and a conection to SDA bus. I'm using Keil + U-Multilink + KL05Z.
I follow the guidelines of other posts (hold the reset_b to gnd during the powerup) but the MCU doesn't go to program mode.
I read that this situation is normal before the first programming , but I don't know what i'm doing wrong.
I send a picture of the reset_b pin :
does exist a procedure to resolve this issue ?
Thanks in advance for your help.