NXP Semiconductors K32 L2A Series, Reference Manual, Page: 627 / 1379

24.4.8 Flash Program and Erase
All flash functions except read require the user to setup and launch a flash command
through a series of peripheral bus writes.
The user cannot initiate any further flash commands until notified that the current
command has completed. The flash command structure and operation are detailed in
Flash Command Operations .
24.4.9 Flash Command Operations
Flash command operations are typically used to modify flash memory contents.
The next sections describe:
• The command write sequence used to set flash command parameters and launch
execution
• A description of all flash commands available
24.4.9.1 Command Write Sequence
Flash commands are specified using a command write sequence illustrated in Figure
24-5 . The flash memory 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 a flash command in VLP mode will be ignored. Attempts to launch a
flash command in HSRUN mode will be trapped with the ACCERR flag being set.
24.4.9.1.1 Load the FCCOB Registers
The user must load the FCCOB registers with all parameters required by the desired flash
command. The individual registers that make up the FCCOB data set can be written in
any order.
Chapter 24 Flash Memory Module (FTFA)
K32 L2A Reference Manual, Rev. 2, 01/2020
NXP Semiconductors 627