NXP Semiconductors MWCT101 S Series, Reference Manual

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32.5.9 FTFC command operations
FTFC command (not related to CSEc) operations are typically used to modify flash
memory contents. The next sections describe:
• The command write sequence used to set FTFC command parameters and launch
execution
• A description of all FTFC commands available
NOTE
1. For CSEc/SHE commands, refer to Cryptographic Services
Engine (CSEc)
2. Warning: When running any FTFC command such as
ERSALL that changes the flash configuration content, care
must be taken with re-programming the configuration
information prior to reset. Otherwise, the part may get
locked up
32.5.9.1 Command write sequence
FTFC commands are specified using a command write sequence illustrated in Figure
32-11 . The FTFC module performs various checks on the command (FCCOB) content
and continues with command execution if all requirements are fulfilled.
Before launching a command, the ACCERR and FPVIOL bits in the FSTAT register
must be zero and the CCIF flag must read 1 to verify that any previous command has
completed. If CCIF is zero, the previous command execution is still active, a new
command write sequence cannot be started, and all writes to the FCCOB registers are
ignored.
Attempts to launch an FTFC command in VLP mode will be ignored. Attempts to launch
any FTFC command (including SHE commands, FlexRAM/EEPROM accesses) in
HSRUN mode will be trapped with the ACCERR flag being set.
32.5.9.1.1 Load the FCCOB registers
The user must load the FCCOB registers with all parameters required by the desired
FTFC command. The individual registers that make up the FCCOB data set can be
written in any order. The user must be sure to provide all of the required parameters
(which may vary from command to command).
Functional description
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
744 NXP Semiconductors