NXP Semiconductors K22F series, Reference Manual, Page: 316 / 1407

Table 13-28. Parameters for FillMemory Command
Byte # Command
0 - 3 Start address of memory to fill
4 - 7 Number of bytes to write with the pattern
• The start address should be 32-bit aligned.
• The number of bytes must be evenly divisible by 4.
8 - 11 32-bit pattern
• To fill with a byte pattern (8-bit), the byte must be replicated 4 times in the 32-bit
pattern.
• To fill with a short pattern (16-bit), the short value must be replicated 2 times in the
32-bit pattern.
For example, to fill a byte value with 0xFE, the word pattern would be 0xFEFEFEFE; to
fill a short value 0x5AFE, the word pattern would be 0x5AFE5AFE.
Special care must be taken when writing to flash.
• First, any flash sector written to must have been previously erased with a
FlashEraseAll or FlashEraseRegion command.
• Writing to flash requires the start address to be 32-bit or 64-bit aligned.
• If the VerifyWrites property is set to true, then writes to flash will also perform a
flash verify program operation.
When writing to RAM, the start address need not be aligned, and the data will not be
padded.
Process command
Host
Target
FillMemory, with word pattern 0x12345678
ACK:
0x5a a1
ACK:
0x5a a1
Generic Response:
0x5a a4 10 00 e4 57 05 00 00 03 00 70 00 00 00 08 00 00 78 56 34 12
0x5a a4 0c 00 97 04 a0 00 00 02 00 00 00 00 05 00 00 00
Figure 13-11. Protocol Sequence for FillMemory Command
Functional Description
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
316 NXP Semiconductors