No, ATCMPCEN is used to disable or enable ECC check.
To enable correction of ATCM single-bit ECC error, you need to configure ATCMECC to 0 (reset value). In this way, you will not get ABORT for single-bit ECC error of TCFLash (via ATCM).
//Secondary Auxiliary Control Register
Correction for internal ECC logic on ATCM port.[d]
0 = Enabled. This is the reset value.
1 = Disabled.
For more information, please kindly refer to ARM Cortex R5 TRM. ARM Information Center