Kinetis K20 MK20DX256ZVLQ10 on my own board - only JTAG connector + MCU + 3.3V regulator, nothing else. There ale pull ups on RESET_b and NMI_b pins
Rowley CrossStudio for ARM v 2.2
Rowley CrossConnect Lite JTAG adapter
I'm unable to connect to target, I get "Cannot find debug component from ROM Table" or timeout error message when trying to connect.
I can see MCU restarts itself every 50us (square wave with T = 50 us on RESET_b pin) and it doesn't matter whether JTAG adapter is or is not connected to MCU.
JTAG adapter is working fine with another MCU (NXP LPC2138).
Please can you help?