FCMD Command Program flash 0 Program flash 1 Function
0x4A Read 1s All Execute-
only Segments
× × Verify that all program
flash execute-only (XA)
segments are erased
then release flash
access control.
0x4B Erase All Execute-only
Segments
× × Erase all program flash
execute-only (XA)
segments then release
flash access control.
29.4.9.3 Flash Commands by Mode
The following table shows the flash commands that can be executed in each flash
operating mode.
Table 29-2. Flash Commands by Mode
FCMD Command
NVM Normal NVM Special
Unsecure Secure MEEN=10 Unsecure Secure MEEN=10
0x00 Read 1s Block × × × × — —
0x01 Read 1s Section × × × × — —
0x02 Program Check × × × × — —
0x03 Read Resource × × × × — —
0x06 Program Longword × × × × — —
0x08 Erase Flash Block × × × × — —
0x09 Erase Flash Sector × × × × — —
0x40 Read 1s All Blocks × × — × × —
0x41 Read Once × × × × — —
0x43 Program Once × × × × — —
0x44 Erase All Blocks × × — × × —
0x45
Verify Backdoor Access
Key
× × × × — —
0x4A
Read 1s All Execute-only
Segments
× × × × — —
0x4B
Erase All Execute-only
Segments
× × × × — —
29.4.9.4 Allowed Simultaneous Flash Operations
Only the operations marked 'OK' in the following table are permitted to run
simultaneously on the program flash memories. Some operations cannot be executed
simultaneously because certain hardware resources are shared by the memories.
Chapter 29 Flash Memory Module (FTFA)
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 657
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