SIM_FCFG1 field descriptions
Field Description
31–28
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
27–24
PFSIZE
Program flash size
This field specifies the amount of program flash memory available on the device . Undefined values are
reserved.
0000 8 KB of program flash memory, 0.25 KB protection region
0001 16 KB of program flash memory, 0.5 KB protection region
0011 32 KB of program flash memory, 1 KB protection region
0101 64 KB of program flash memory, 2 KB protection region
0111 128 KB of program flash memory, 4 KB protection region
1001 256 KB of program flash memory, 8 KB protection region
1111 128 KB of program flash memory, 4 KB protection region
23–2
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
1
FLASHDOZE
Flash Doze
When set, Flash memory is disabled for the duration of Doze mode. This bit should be clear during VLP
modes. The Flash will be automatically enabled again at the end of Doze mode so interrupt vectors do not
need to be relocated out of Flash memory. The wakeup time from Doze mode is extended when this bit is
set. An attempt by the DMA or other bus master to access the Flash when the Flash is disabled will result
in a bus error.
0 Flash remains enabled during Doze mode
1 Flash is disabled for the duration of Doze mode
0
FLASHDIS
Flash Disable
Flash accesses are disabled (and generate a bus error) and the Flash memory is placed in a low power
state. This bit should not be changed during VLP modes. Relocate the interrupt vectors out of Flash
memory before disabling the Flash.
0 Flash is enabled
1 Flash is disabled
Memory map and register definition
KL25 Sub-Family Reference Manual, Rev. 3, September 2012
212 Freescale Semiconductor, Inc.
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