SPRUIZ1B July 2023 – August 2024 TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK , TMS320F28P659DH-Q1 , TMS320F28P659DK-Q1 , TMS320F28P659SH-Q1
The password locations in USER OTP for each zone can be locked by programming the zone’s PSWDLOCK field with any value other than 1111 (0xF) at the PSWDLOCK location in OTP. Until the passwords of a zone are locked, password locations are not secure and can be read from the debugger as well as code running from non-secure memory. This feature can be used by the user to avoid accidental locking of the zone while programming the Flash sectors during the software development phase. On a new device, the value for password lock fields for all zones at the PSWDLOCK location in OTP is 1111, which means the password for all zones is unlocked.