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Functional description
FRDM-K32L3A6 Freedom Development Board, User’s Guide, Rev. B0, 09/2019
NXP Semiconductors
13
Figure 13. FRDM-K32L3A6 HMI circuit.
SW2 provides an external pull up device. It is connected to the K32L3A6 NMI pin. This provides the
option of using this switch as an NMI/wake up source, ROM bootloader boot option source or as a
general-purpose input with interrupt capability.
SW3, SW4 and SW5 all provide general purpose inputs with interrupt and wake up capability. The
internal pull up device for each pin must be enabled when these are being used.
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