Therefore, use the CSPMCR and port control registers to configure which control signal
is available on the external pin. All control signals, except for FB_TA, are assigned to the
ALT5 function in the port control module. Since, unlike the other control signals, FB_TA
is an input signal, it is assigned to the ALT6 function.
3.5.7.3 FlexBus CSCR0 reset value
On this device the CSCR0 resets to 0x003F_FC00. Configure this register as needed
before performing any FlexBus access.
3.5.7.4 FlexBus Security
When security is enabled on the device, FlexBus accesses may be restricted by
configuring SIM_SOPT2[]. See System Integration Module (SIM) for details.
3.5.7.5 FlexBus line transfers
Line transfers are not possible from the ARM Cortex-M4 core. Ignore any references to
line transfers in the FlexBus chapter.
3.6
Security
3.6.1 CRC Configuration
This section summarizes how the module has been configured in the chip. For a
comprehensive description of the module itself, see the module’s dedicated chapter.
Chapter 3 Chip Configuration
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 95
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