Datasheet

Input/output connectors
Freedom FRDM-KV31F Development Platform User’s Guide, User's Guide, 0, 02/2016
12 Freescale Semiconductor, Inc.
11. Push Button Switches
Two push buttons, SW2 and SW3, are available on the FRDM-KV31F board, where SW2 is connected
to
PTC6, and SW3 is connected to PTA4. Besides the general purpose input/output functions, SW2 and
SW3 can be a low-power wake up signal. Also, only SW3 can be a non-maskable interrupt.
Table 5. Push button GPIO function
Switch
GPIO Function
SW2
PTA4/LLWU_P3/FTM0_CH1/FTM0_FLT3/NMI/EZP_CS
SW3
PTE4/LLWU_P2/SPI1_PCS0/LPUART0_TX
Figure 10. Push button switches
12. Input/output connectors
The MKV31F512VLL12 microcontroller is packaged in a 100-pin LQFP. Some pins are utilized in
onboard circuitry, but some are directly connected to one of the four I/O headers.
The pins on the KV31 microcontroller are named for their general purpose input/output port pin
function. For example, the first pin on Port A is referred as PTA1. The name assigned to the I/O
connector pin is same as of the KV31 pin connected to it, if applicable.