NXP Semiconductors FRDM-MCXN947 User manual
UM12018
FRDM-MCXN947 Board User Manual
Rev. 1 — 20 January 2024 User manual
Document information
Information Content
Keywords FRDM-MCXN947, UM12018, MCXN947
Abstract The NXP FRDM-MCXN947 board is a low-cost design and evaluation board based on MCXN947
device. This document describes the hardware for the FRDM-MCXN947 board.
NXP Semiconductors UM12018
FRDM-MCXN947 Board User Manual
1 FRDM-MCXN947 overview
The NXP FRDM-MCXN947 board is a low-cost design and evaluation board based on the MCXN947 device.
The MCXN947 device integrates a dual Arm Cortex-M33 microcontroller and a neural processing unit (NPU)
into a single package. NXP supports the MCXN947 device with tools and software that include hardware
evaluation boards, software development IDE, example applications, and drivers.
The FRDM-MCXN947 board consists of one MCXN947 device with a 64 Mbit external serial flash (provided
by Winbond). The board also features P3T1755DP I3C temperature sensor, TJA1057GTK/3Z CAN PHY,
Ethernet PHY, SDHC circuit (card slot is DNP), RGB LED, touch pad, high-speed USB circuit, push buttons, and
MCU-Link debug probe circuit. The board is compatible with the Arduino shield modules, Pmod boards, and
mikroBUS. The board also supports a camera module and NXP lost-cost LCD module PAR-LCD-S035.
The onboard MCU-Link debug probe is based on the LPC55S69 MCU. Before using the MCU-Link functionality,
ensure that it is programmed with the required firmware. For details, see Section 3.5.
1.1 Block diagram
Figure 1 shows the FRDM-MCXN947 board block diagram.
Figure 1. FRDM-MCXN947 block diagram
1.2 Board features
Table 1 describes the features of the FRDM-MCXN947 board.
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NXP Semiconductors UM12018
FRDM-MCXN947 Board User Manual
Board feature Target MCU features used Description
MCXN947 MCU
(target MCU)
The MCXN947 MCU is based on dual high-performance
Arm Cortex-M33 cores running up to 150 MHz, with 2 MB of
Flash with configurable full ECC RAM, a DSP coprocessor
and an integrated proprietary neural processing unit (NPU).
For details, see the MCX Nx4x Reference Manual.
Power supply •P5V0 (5 V) input power supply using one of the following
power sources:
–High-speed USB2.0 Type-C connector
–5 V regulator populated at 3-pin jumper
–Arduino Shield compatible header
–MCU-Link USB2.0 Type-C connector
•One LDO for 3.3 V power supply
•Jumpers and resistors configuration for different power
supplies
Clock Crystal oscillators for:
•24 MHz system reference clock
•32.768 kHz real-time clock (RTC)
•50 MHz Ethernet PHY clock input
•16 MHz clock input for MCU-Link
USB High-speed (HS) USB module One USB Type-C connector interfaced with high-speed USB
controller and PHY module
Flash memory FlexSPI controller Supports either of the following two options:
•Winbond W25Q64JVSSIQ - 64 Mbit QSPI flash memory
(populated)
•Micron MT35XL512ABA1G12 - 512 Mbit Octal flash
memory (DNP)
Temperature sensor Improved inter-integrated circuit (I3C) Supports NXP P3T1755DP temperature sensor
Ethernet Ethernet controller (ENET0) 10 / 100 Mbit/s (RMII) LAN8741 Ethernet PHY and RJ45
connector
I/O headers Headers compatible with:
•Arduino shields (outer rows) and FRDM header (inner
rows)
•Mikroe click boards
•Camera module
•LCD module
•Peripheral module (Pmod)
CAN FlexCAN controller One TJA1057GTK/3Z CAN PHY and one 4-pin CAN FD
connector
Mass storage µSDHC MicroSD card connector (DNP by default)
Touch pad Touch sensing input (TSI) One Touch Slider for touch sensing detection; connects to
the TSI input channel through the P1_3 pin
Debug •Onboard MCU-Link debug probe with CMSIS-DAP and
SEGGER J-Link protocol options. It can connect to the
target MCU through a USB-to-UART, USB-to-SPI, or USB-
to-I2C bridge.
•10-pin Arm JTAG/SWD connector for connecting an
external debug probe
Table 1. FRDM-MCXN947 features
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FRDM-MCXN947 Board User Manual
Board feature Target MCU features used Description
PCB 118 mm x 55 mm
Orderable part
number
FRDM-MCXN947
Table 1. FRDM-MCXN947 features...continued
1.3 Board kit contents
The FRDM-MCXN947 board kit contains the following items:
•FRDM-MCXN947 board hardware assembly
•A 3 ft micro USB Type A to USB Type C cable
1.4 Board pictures
Figure 2 shows the top view of FRDM-MCXN947.
Target MCU MCXN947
MCU-Link LPC55S69
Figure 2. FRDM-MCXN947 top view
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FRDM-MCXN947 Board User Manual
Figure 3 shows the top-side view of the FRDM-MCXN947 board, with connectors, push buttons, and LEDs
highlighted.
J17
MCU-Link5 USB
J16
MCX 10/100
Ethernet
connector
J11
MCX HS USB
J8
FlexIO / LCD
connector
J9
Camera connector
J7
PMOD connector
J1
Arduino
compatible
header (outer row) /
FRDM header (inner
row)
J2
Arduino
compatible
header (outer row) /
FRDM header (inner
row)
J4
Arduino
compatible
header (outer row) /
FRDM header (inner
row)
J3
Arduino
compatible
header (outer row) /
FRDM header (inner
row)
J5
mikroBUS header
J6
mikroBUS header
J23
MCX SWD
SW1
Reset
D1
MCX RST
LED
SW2
Wakeup
SW3
ISP
J10
CAN
header
D5 LED
D2
RGB LED
Figure 3. FRDM-MCXN947 connectors, push buttons, and LEDs (top-side view)
Figure 4 shows the jumpers on the FRDM-MCXN947 board.
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FRDM-MCXN947 Board User Manual
J18
J19
J15 (DNP)
J24
J26 J25 J27 J28
(DNP)
J22 J21
Figure 4. FRDM-MCXN947 jumpers
1.5 Connectors
Table 2 describes the FRDM-MCXN947 connectors. The connectors are shown in Figure 3.
Part
identifier
Connector type Description Reference section
J1 2 x 8 pin header
J2 2 x 10 pin header
J3 2 x 8 pin header
J4 2 x 6 pin header
Arduino compatible I/O header (outer rows) and
FRDM header (inner rows)
Section 2.9
J5 1 x 8 position receptacles mikroBUS socket connector Section 2.11
J6 1 x 8 position receptacles mikroBUS socket connector Section 2.11
J7 2 x 6 header (DNP) Pmod connector Section 2.13
J8 2 x 14 pin header FlexIO header for LCD screen connection Section 2.10
J9 2 x 16 pin header Used for connecting a camera Section 2.12
J10 2 x 2 pin header Connects to the CAN bus and allows external
connection with the bus
Section 2.5
J11 USB Type-C connector USB1 high-speed connector Section 2.3
J12 SDHC connector (DNP) To connect an external SD card Section 2.7
Table 2. FRDM-MCXN947 connectors
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FRDM-MCXN947 Board User Manual
Part
identifier
Connector type Description Reference section
J16 RJ45 connector Shielded RJ45 connector jack with magnetic
built-in
Section 2.4
J17 USB connector MCU-Link USB connector Section 3.7
J23 2 x 5 pin header Debug (JTAG / SWD) connector to connect an
external debug probe or external debug target
Section 3.8
Table 2. FRDM-MCXN947 connectors...continued
1.6 Jumpers
Table 3 describes the FRDM-MCXN947 jumpers. The jumpers are shown in Figure 4.
Part
identifier
Jumper type Description Reference section
J18 1x2 pin header •Open (default setting): MCU-Link VCOM port is enabled.
•Shorted: Sends a low signal on LPC_HW_VER_6 to
disable MCU-Link VCOM port
Section 3.8
J19 1x2 pin header •Open (default setting): Enables the MCU-Link SWD
feature
•Shorted: Sends a low signal on LPC_HW_VER_7 to
disable the onboard MCU-Link SWD feature
Note: This configuration is required to enable target MCU
debug through an external debug probe.
Section 3.3
J21 1x2 pin jumper MCU-Link (LPC55S69) force ISP mode jumper:
•Open (default setting): MCU-Link follows the normal
boot sequence (MCU-Link boots from internal flash if a
boot image is found). With the internal flash erased, the
MCU-Link normal boot sequence falls through to ISP boot
mode.
•Shorted: MCU-Link is forced to ISP mode (USB). Use this
setting to reprogram the MCU-Link internal flash with a
new image or use the MCUXpresso IDE with the CMSIS-
DAP protocol.
Note: By default, MCU-Link flash is preprogrammed with a
version of CMSIS-DAP firmware.
Section 3.5
J22 1x2 pin jumper MCU-Link SWD clock enable jumper:
•Open: MCU-Link SWD clock is disabled.
•Shorted (default setting): MCU-Link SWD clock is
enabled.
For more information
on this jumper, see
the FRDM-MCXN947
schematic
J24 1x2 pin header Pin 1-2 shorted (default setting): P3V3_MCU is sourced
from the P3V3 power supply
Section 2.1.1
J25 (DNP) 1x2 pin jumper DNP by default.
If shorted, VDD_IO_USB is powered by P3V3_MCU through
the jumper.
Note: BY default, VDD_IO_USB is powered from the P3
V3_MCU supply through a zero-ohm shunt resistor.
Section 2.1.1
J26 (DNP) 1x2 pin jumper DNP by default. Section 2.1.1
Table 3. FRDM-MCXN947 jumpers
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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.
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FRDM-MCXN947 Board User Manual
Figure 5. Push button circuit diagram
1.8 LEDs
Table 5 describes the FRDM-MCXN947 light-emitting diodes (LEDs) that correspond to the target MCU. The
board also has some MCU-Link-specific LEDs, which are described in Section 3.10. The LEDs are shown in
Figure 3.
Note: The FRDM-MCXN947 board also has three status indicator LEDs for MCU-Link. For details, see
Section 3.10.
Part
identifier
LED color LED name / function Description
D1 Red Reset LED Indicates system reset activity. When board reset is initiated,
for example, by pressing the SW1 reset button, the D1 LED
turns ON.
D2 Red/green/blue RGB LED User application LEDs. Each of these LEDs can be controlled
through a user application.
•Red LED connects to target MCU pin P0_10
•Green LED connects to target MCU pin P0_27
•Blue LED connects to target MCU pin P1_2
D5 Green P3V3 PWR ON Indicates P3V3 power on status. When P3V3 is available on
board, D5 turns ON.
Table 5. FRDM-MCXN947 LEDs
Figure 6 shows the circuit diagram of the RGB LEDs described in Table 5.
Figure 6. RGB LED circuit diagram
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FRDM-MCXN947 Board User Manual
2 FRDM-MCXN947 functional description
This section describes the features and functions of the FRDM-MCXN947 board. You can use the functionality
described in this section as a reference while designing your own target board.
Note: For more details on the MCXN947 MCU, see MCX N94x, N54x Product Family Data Sheet and MCX
Nx4x Reference Manual.
2.1 Power supplies
The FRDM-MCXN947 board is powered with a P5V0 (5 V) power supply using one of the following source
options:
•P5V_USB_HS supply from high-speed (HS) USB2.0 Type-C connector (J11)
•P5V_HDR_IN supply from 5 V regulator populated at 3-pin jumper (J15) (Not populated by default)
•P5V0 supply from Arduino Shield compatible header, J3 (pin 10)
•P5V_MCU_LINK_USB supply from MCU-Link USB2.0 Type-C connector (J17)
The P5V0 supply is an input power supply on the board and is a source for secondary power supplies.
Other power supplies in the FRDM-MCXN947 board are through voltage regulators or are connected through
jumpers, which can be used to enable/disable a power supply.
Section 2.1 shows the system power circuit on the FRDM-MCXN947 board.
Figure 7. FRDM-MCXN947 system power circuit diagram
5 V power sources and selection
Table 6 describes the 5 V input power sources and their output power supplies.
Part identifier Device / power source Output power supply Description
J17 MCU-Link USB2.0
Type-C connector
P5V_MCU_LINK_USB •One of the sources of P5V0 (5 V) supply
(default option)
•USB regulator input power supply for MCU-
Link microcontroller LPC55S69
J11 HS USB2.0 Type-C
connector
P5V_USB_HS One of the sources for P5V0 (5 V) supply
J15 5 V power regulator
populated at J15
P5V_HDR_IN One of the sources for P5V0 (5 V) supply
J3 (pin 10) Arduino shield
compatible header
P5V0 Power supply for:
•XC6227C331PR-G LDO voltage regulator
(U2)
•TJA1057 CAN PHY (U10) and CAN 2x2-pin
header (J10)
•mikroBUS connector (J5)
Table 6. 5 V power sources
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