Clear the CCIF to launch the command
Write 0x80 to FSTAT register
Clear the old errors
Access Error and
Protection Violation
Check
FCCOB
ACCERR/
FPVIOL
Set?
EXIT
Write to the FCCOB registers
to load the required command parameter.
More
Parameters?
Availability Check
Results from previous command
Read: FSTAT register
Write 0x30 to FSTAT register
no
yes
no
yes
Previous command complete?
no
CCIF
= ‘1’?
yes
START
CCIF
= ‘1’?
Read: FSTAT register
no
yes
Bit Polling for
Command Completion
Check
Figure 29-5. Generic flash command write sequence flowchart
29.4.9.2
Flash Commands
The following table summarizes the function of all flash commands.
FCMD
Command Program flash 0 Program flash 1 Function
0x00 Read 1s Block × × Verify that a program
flash block is erased.
Table continues on the next page...
Chapter 29 Flash Memory Module (FTFA)
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 655
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