Hi everybody, I am developing my own k20 board specifically with mk20dx256vlh7, my problem is that I have already mass erased 2 chips ( first to do before debug and program), but I must have erase (and program) 4 more, I am doing same process as 2 I have already erased but without good results with 4 chips.
By reading posts and documentation I know that maybe it's a registers issue, but cartainly this is a new issue for me.
I am using PE micro multilink universal, SWD/JTAG configurations, IDE Code Warrior.
Reset_b: 10K pull up
Ez_port: 10K pull up
DIO: 10K pull up
CLK: 10K pull down + capacitor 1000pF pull down
I followed above circuit recommendations from other posts and datasheets from freescale.
I attach some print screens of my process:
I am really concerned about this, cause I can't explain how it's possible that I have succes with 2 chips (both configurations SWD and JTAG) but no with other.
I hope you can help me with this.
Thanks so much.