hello all Renesas fans：
background：one RH850/F1L series MCU was sent to factory for defect analysis；
however，it indicated an error (E100000C) that aimed to the flash rom，showing the information as follow：
Disconnecting the tool
Error(E100000C): A serial programming connection is prohibited for this device. (Command: 00, Response: DC)
i wonder how to solve this problem.
（i guess the security module prevented the connect，or other factor to cause this problem？）
It sounds like the security setting to disable the serial programming interface has been activated. Unfortunately this setting not reversible.
This snippet is from F1K but F1L is similar:
thanks for your reply！
i also found the description about “E100000C ” in flash memory programming software user‘s manual：
i think you are right.
but one more question, under what circumstance will the security setting activate to prohibit the connection？
I will appreciate it if you can reply me.
I am not sure what exactly you are asking - the security setting must be intentionally set, either from a programmer or using self-programming.