Cannot connect to TC275 after enable read protection for PFlash

[User20429]

Hi all,

I have an issue with protection for TC275.

The thing is I use memtool to enable read protection for PFlash of TC275 by config UCB.
I follow guideline at https://www.infineonforums.com/threads/5250-Password-Protected-JTAG-Flashing-Query

Enable protection is successful. Then I try to reconnect to chip by memtool after reset even when I input the same password with the one to enable protection.
The result is always fail.

Is there any ways to reconnect to the TC275 chip in this case?

Thanks.
NoanBui

[VincentWan · Accepted solution]

if u enabled READ protection without debug interface lock = 1, then the device is locked forever.