I had found a problem with STM32L486, That I connect this pin with 100K pull up to 3V3 and a 0.1uF cap to GND. It won't work when I drag&drop through SWDIO/SWDCLK .hex files in to it. But if I connect this "Reset" pin just with 0.1uF cap to GND, or connect this pin with 10K pull up to 3V3 and 0.1uF cap to GND. it works fine(can drag&drop .hex file in to it)
Any one have ideas about this?