NXP Semiconductors
UM12018
FRDM-MCXN947 Board User Manual
Part
identifier
Jumper type Description Reference section
If shorted, VDD_ANA is powered by P3V3_MCU through the
jumper.
Note: BY default, VDD_ANA is powered from the P3V3_
MCU supply through a zero-ohm shunt resistor.
J27 (DNP) 1x2 pin jumper DNP by default.
If shorted, VDD_BAT is powered by P3V3_MCU through the
jumper.
Note: BY default, VDD_BAT is powered from the P3V3_
MCU supply through a zero-ohm shunt resistor.
Section 2.1.1
J28 (DNP) 1x2 pin jumper DNP by default.
If shorted, VDD_CORE_SYS is powered by P3V3_MCU
through the jumper.
Note: BY default, VDD_CORE_SYS is powered from the
P3V3_MCU supply through a zero-ohm shunt resistor.
Section 2.1.1
Table 3. FRDM-MCXN947 jumpers...continued
1.7 Push buttons
Tactile buttons are populated on the FRDM-MCXN947 board for human machine interaction (HMI). Each of the
SW[1:3] buttons has a 0.1 µF bypass capacitor for debouncing and pads for external pull-up resistors.
Table 4 describes the FRDM-MCXN947 push buttons. The push buttons are shown in Figure 3.
Part identifier Switch name Description
SW1 Reset button (MCXN947 RST) Pressing SW1 resets the target MCU that causes board peripherals to
reset to their default states and execute the boot code. When SW1 is
pressed, the reset LED D1 turns ON.
SW2 Wakeup button SW2 is a general-purpose input and a low-power wake up unit (WUU)
pin. Pressing SW2 gives a low level on P0_23/WAKEUP_B, otherwise,
it is a high level on P0_23/WAKEUP_B.
SW3 In-system programming (ISP)
mode switch
SW3 is an ISP mode switch and can also act as a general-purpose
input. Pressing SW3 gives a low level on P0_6/ISPMODE_N-DEBUG,
otherwise, it is a high level on P0_6/ISPMODE_N-DEBUG.
Table 4. FRDM-MCXN947 push buttons
Figure 5 shows the circuit diagrams of the FRDM-MCXN947 push buttons.
UM12018 All information provided in this document is subject to legal disclaimers. © 2024 NXP B.V. All rights reserved.
User manual Rev. 1 — 20 January 2024
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