NXP Semiconductors MCX-N9 EVK Series User manual

UM12036
MCX-N9XX-EVK Board User Manual
Rev. 1 — 20 January 2024 User manual
Document information
Information Content
Keywords MCX-N9XX-EVK, UM12036, MCX N94x
Abstract The NXP MCX N9XX Evaluation Kit (MCX-N9XX-EVK) board is a full-featured evaluation and
development board for application prototyping and demonstration of the MCX N94x family of
devices. This document describes the hardware for the MCX-N9XX-EVK development board.

NXP Semiconductors UM12036
MCX-N9XX-EVK Board User Manual
1 MCX-N9XX-EVK overview
The NXP MCX N9XX Evaluation Kit (MCX-N9XX-EVK) board is a full-featured evaluation and development
board for application prototyping and demonstration of the MCX N94x family of devices.
The MCX N94X integrates a dual Arm Cortex-M33 MCU and a neural processing unit (NPU) into a single
package. NXP supports MCX N94X with tools and software that include hardware evaluation boards, software
development IDE, example applications, and drivers.
The MCX-N9XX-EVK development board consists of the MCX N94X device with a 64-Mbit external serial flash
(provided by Winbond), FXLS8964AF accelerometer, P3T1755DP I3C temperature sensor, visible light sensor,
onboard CAN PHY, Ethernet PHY, SDHC circuit, general-purpose RGB LED, touch slider, FS and HS USB
circuits, general-purpose push buttons, and onboard MCU-Link debug probe circuit with energy monitoring. The
board is compatible with the Arduino and FRDM ecosystem shield modules and Mikroe click boards.
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.
The board is a standalone PCB and supports application development with the NXP SDK software package.
Note:
•The MCX N94x represents the MCX N947 and MCX N946 devices in this document.
•For simplicity, the MCU-Link debug probe is referred to as "MCU-Link" and the MCX N94X MCU is referred to
as "target MCU" in this document.
1.1 Block diagram
Figure 1 shows the MCX-N9XX-EVK block diagram.
Figure 1. MCX-N9XX-EVK block diagram
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1.2 Board features
Table 1 describes the features of the MCX-N9XX-EVK board.
Board feature Target MCU features used Description
MCX N94x MCU
(target MCU)
The MCX N94x is based on dual high-performance Arm
Cortex-M33 cores running up to 150 MHz, with 2 MB of
Flash with optional 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:
–MCU-Link USB micro-B connector (default source)
–Full-speed (FS) micro USB connector
–High-speed (HS) micro USB connector
–Arduino Shield compatible header
–5 V regulator populated at 3-pin jumper
•A 10-pin jumper (J26) is used for the 5 V power source
selection
•PCA9420 PMIC for flexible voltage selections
•Jumpers for different power sources selection
Clock Two crystal oscillators for:
•24 MHz system reference clock
•32.768 kHz real-time clock (RTC)
USB USB full-speed (FS) and high-speed
(HS) modules
•One USB Micro-AB connector interfaced with USB HS
host / device mode module
•One USB Micro-AB connector interfaced with USB FS
host / device mode module
Flash memory FlexSPI controller One 1.8 V 64-Mbit (8 MB) serial flash memory with dual and
quad SPI
3D Accelerometer Low-power inter-integrated circuit
(LPI2C) module
Supports NXP FXLS8964AF accelerometer for motion
sensing
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
•Mikroe click boards
Light sensor ADC One ambient light sensor, consisting of a phototransistor in a
miniature SMD
Wi-Fi / Bluetooth
interface
SDIO, I2S, UART, I2C, and GPIO •One M.2 Key E mini card 75-pin connector supporting
SDIO, I2S, UART, I2C, and Vendor-defined SPI interfaces
•Compatible with Murata IW416 Wi-Fi card module
CAN FlexCAN controller One 4-pin CAN FD connector
Mass storage uSDHC MicroSD card connector
Touch slider Touch sensing input (TSI) One Touch Slider for touch sensing detection; connects to
TSI input channels through the P1_10 and P1_12 pins
Table 1. MCX-N9XX-EVK features
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Board feature Target MCU features used Description
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
PCB 6” 3/4 x 4” 5/16 x 1/16”
Orderable part
number
MCX-N9XX-EVK
Table 1. MCX-N9XX-EVK features...continued
1.3 Board kit contents
The MCX-N9XX-EVK board kit contains the following items:
•MCX-N9XX-EVK board hardware assembly
•A 3 ft micro USB A to micro USB B cable
•Nylon screws (4-40 x ¼”)
•Nylon standoffs (4-40 x 1.25, 3/16 Hex)
1.4 Board pictures
Figure 2 shows the top view of MCX-N9XX-EVK.
MCX N947
processor
Figure 2. MCX-N9XX-EVK top view
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Figure 3 shows the top-side view of the MCX-N9XX-EVK board, with connectors, push buttons, and LEDs
highlighted.
J21
(PMIC
controller)
J5
(MCU-Link USB)
J11
(Debug and trace)
J27
(HS USB)
J28
(FS USB)
J13
(MCU-Link
GPIO header)
J14
(DMIC EXP.)
J25
(SDHC)
J9
(External Flash)
J29
(CAN Bus)
J2 J1
(Arduino)
J3 J4
(Arduino)
J19
(MikroBUS)
J22
(MikroBUS)
J20
(FlexIO)
J12
(M.2)
J15
(MCU-Link SWD)
J8
(10 / 100 Mbit/s RJ45)
E1
(Touch slider)
SW1
(MCX N9
Reset)
SW6
(MCU-Link
Reset)
SW3
(NMI)
SW3
(ISP)
SW4
(Wakeup)
SW5
(PMIC RST)
D22
(RGB LED)
D25
D24
D7
D21
D13 D14 D8 D12 D10 D11 D9
MCU-Link
LEDs
Figure 3. MCX-N9XX-EVK connectors, push buttons, and LEDs (top-side view)
Figure 4 shows the jumpers of the MCX-N9XX-EVK board.
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J26 JP43
JP44
JP46
JP41
JP48
J24
JP4
JP28
JP30
JP34
JP39
JP45
JP17
JP21
J17 J18
JP25
JP26
JP29
JP32 JP33
JP40
JP27
JP35
JP31
JP36JP37
JP47
JP42
JP13
JP15
JP14
JP18
JP16 (DNP)
JP20 (DNP)
JP1 (DNP)
JP3 (DNP)
JP6
JP5
JP9
JP10
(DNP)
JP11
(DNP) JP12
J23 (DNP) JP49
JP19
JP38
JP2 (DNP)
JP7 JP8
(DNP)
JP22
JP24
JP23
Figure 4. MCX-N9XX-EVK jumpers
1.5 Connectors
Table 2 describes the MCX-N9XX-EVK connectors. The connectors are shown in Figure 3.
Part
identifier
Connector type Description Reference section
BT1 Coincell battery holder Holder for 3 V CR2025 or CR 2032 lithium
coincell battery required for PMIC Battery
backup (VBAT_BKUP)
Note: This holder is at the bottom of the board
underneath the MCU RST button (SW1).
J24 1 x 2 pin header Lithium-ion/external battery connector
For more information on this
connector, see MCX-N9XX-
EVK schematics
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 Section 2.12
J5 USB connector MCU-Link USB connector Section 3.7
Table 2. MCX-N9XX-EVK connectors
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Part
identifier
Connector type Description Reference section
J8 RJ45 connector Shielded RJ45 connector jack with magnetic
built-in
Section 2.6
J9 (DNP) 2 x 14 pin header To connect external flash daughter card Section 2.5
J11 2 x 10 pin header Debug (JTAG / SWD) and trace connector to
connect an external debug probe or external
debug target
Section 3.8
J12 75-pin connector M.2 Key E module connector Section 2.11
J13 1 x 6 pin header MCU-Link GPIO header Section 3.12
J15 (DNP) 2 x 5 pin header MCU-Link SWD connector For more information on this
connector, see MCX-N9XX-
EVK schematics
J16 1 x 1 header To monitor CLKOUT clock output on P0_6 For more information on this
connector, see MCX-N9XX-
EVK schematics
J19 1 x 8 position receptacles mikroBUS socket connectors Section 2.14
J20 2 x 14 pin header FlexIO header for LCD screen connection Section 2.13
J21 1 x 6 pin header To connect a PMIC controller for regulating
PMIC (U2) regulator outputs
For more information on this
connector, see MCX-N9XX-
EVK schematics
J22 1 x 8 position receptacles mikroBUS socket connectors Section 2.14
J25 SDHC connector To connect an external SD card Section 2.4
J27 USB micro-AB connector USB1 high-speed connector Section 2.3
J28 USB micro-AB connector USB0 full-speed connector Section 2.3
J29 1 x 4 pin header Connects to the CAN bus and allows external
connection with the bus
Section 2.9
JP42 2 x 3 pin header Used for tamper different mode test Section 2.15
Table 2. MCX-N9XX-EVK connectors...continued
1.6 Jumpers
Table 3 describes the MCX-N9XX-EVK jumpers. The jumpers are shown in Figure 4.
Part
identifier
Jumper type Description Reference section
J26 2x5 pin header P5V0 input power selection
•Pin 1-2 shorted (default setting): P5V_MCU_LINK_USB
supply from MCU-Link USB micro-B connector (J5)
•Pin 3-4 shorted: P5V_HDR_IN from 5 V regulator
populated at 3-pin jumper (J23)
•Pin 7-8 shorted: VREG_IN_USB1 supply from HS micro
USB connector (J27)
•Pin 9-10 shorted: VREG_IN_USB0 supply from FS micro
USB connector (J28)
Section 2.1
Table 3. MCX-N9XX-EVK jumpers
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Part
identifier
Jumper type Description Reference section
JP4 1x2 pin header •Pin 1-2 open: Disconnects the P3V3 supply from the
LAN8741 Ethernet PHY circuit
•Pin 1-2 shorted (default setting): Connects the P3V3
supply to the VDD analog pins of the LAN8741 Ethernet
PHY
Section 2.6
JP5 1x2 pin header •Open (default setting): Enables the onboard MCU-Link
USBSIO bridge feature for SPI
•Shorted: Sends a low signal on HW_VER_2 to disable the
onboard MCU-Link USBSIO bridge feature for SPI
Section 3.9
JP6 1x2 pin header •Open (default setting): Enables the MCU-Link SWD
feature
•Shorted: Sends a low signal on 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
JP9 1x2 pin header •Open (default setting): No JTAG connection
•Shorted: Connects TDI signal to P0_3 port for JTAG
connection
For more information
on this jumper, see
MCX-N9XX-EVK
schematic
JP12 1x3 pin header Target power selection jumper
•1-2 shorted (default setting): Onboard target MCU is
used as a debug target or an external target MCU is used
as a debug target but it uses board power
•2-3 shorted: An external target MCU is used as a debug
target and it uses its own power
Section 3.3
JP13 1x3 pin header •Pin 1-2 shorted (default setting): Port P1 pin 21 (P1_21)
connects to the DA7212 audio codec (DNP) through dual-
supply translating transceiver NTS0302
•Pin 2-3 shorted: Port P1 pin 21 connects to the MDIO
interface of the LAN8741 Ethernet PHY
For more information
on this jumper, see
MCX-N9XX-EVK
schematic
JP14 1x2 pin header Pin 1-2 shorted (default setting): VDD_MCU is sourced
from MCU_PWR supply
For more information
on this jumper, see
MCX-N9XX-EVK
schematic
JP15 (DNP) 1x3 pin header •Pin 1-2 shorted: VDD_P3 is sourced from the P3V3 power
supply
•Pin 2-3 shorted (default setting): VDD_P3 is sourced
from P1V8 supply
Note: VDD_P3 must be 1.8 V for QSPI flash and SIM card
interfaces.
Section 2.1.1
JP17 1x3 pin header •Pin 1-2 shorted (default setting): Port P0 pin 11 (P0_11)
connects to SD connector power switch
•Pin 2-3 shorted: Port P0 pin 11 connects to the VBUS
controller (NX5P3090UK) of USB FS
Section 2.4
JP18 1x3 pin header •Pin 1-2 shorted: VDD_LDO_CORE_IN is sourced from
MCU_PWR power supply
•Pin 2-3 shorted (default setting): VDD_LDO_CORE_IN is
sourced from VDD_CORE supply
Section 2.1.1
Table 3. MCX-N9XX-EVK jumpers...continued
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Part
identifier
Jumper type Description Reference section
Note: Default setting for LDO_CORE disable case.
JP19 1x2 pin header •Open (default setting): Enables serial port connection
(VCOM) between MCU-Link and the target MCU
(connected through pins P1_8 and P1_9)
•Shorted: Sends a low signal on HW_VER_6 to disable
serial port connection (VCOM) available between the
MCU-Link LPC55S69 and the MCX N94X MCU
Section 3.8
JP21 1x3 pin header •Pin 1-2 shorted (default setting): Port P1 pin 11 (P1_11)
connects to P3T1755DP temperature sensor if jumper
JP23 is shorted
•Pin 2-3 shorted: Port P1 pin 11 (P1_11) connects to the
FlexIO header
For more information
on this jumper, see
MCX-N9XX-EVK
schematic
JP22 1x2 pin header MCU-Link debug probe target selection jumper:
•Open (default setting): The MCU-Link debug probe
or an external debug probe can be connected to the
onboard target MCU. Use this setting when the target
MCU operates in Normal mode (its SWD interface is
enabled).
•Shorted: The MCU-Link debug probe can be connected to
an external target MCU. Use this setting when using the
MCU-Link debug probe for debugging an external target
MCU.
Section 3.3
JP23 1x2 pin header •Open (default setting): To disable external pull-up
resistance on the I3C SDA
•Shorted: To enable external pull-up resistance on I3C SDA
Section 2.8
JP24 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.
Installing device
drivers and updating
MCU-Link firmware
JP25 1x2 pin header USB-to-I2C bridge enable/disable jumper
•Open: The USB-to-I2C bridge between MCU-Link and the
target MCU is disabled
•Shorted (default setting): MCU-Link is connected to the
target MCU through a USB-to-I2C bridge
Section 3.9
JP26 1x2 pin header Pin 1-2 shorted (default setting): VDD_BRD is sourced
from MCU_PWR_SRC supply
For more information
on this jumper, see
MCX-N9XX-EVK
schematic
JP27 2x3 pin header •Pin 1-2 shorted (default setting): VDD_DCDC is sourced
from the MCU_PWR power supply
•Pin 3-4 shorted: VDD_DCDC is pulled down to GND
Section 2.1.1
Table 3. MCX-N9XX-EVK jumpers...continued
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Part
identifier
Jumper type Description Reference section
•Pin 5-6 shorted: VDD_DCDC is pulled down to GND
Note: In DC-DC bypass mode, open pin 1-2 and short pins
3-4 and 5-6.
JP28 1x2 pin header •Pin 1-2 open (default setting): Voltage reference output
(VREFO) does not connect to Pin 16 of Arduino connector
J1
•Pin 1-2 shorted: VREFO connects to Pin 16 of Arduino
connector J1
Section 2.12
JP30 1x2 pin header Pin 1-2 shorted (default setting): VREFH is sourced from
VDDA supply
For more information
on this jumper, see
MCX-N9XX-EVK
schematic
JP31 1x2 pin header Pin 1-2 shorted (default setting): VDD_SYS is sourced from
VDD_LDO_SYS_IN supply
Note: This is shorted in LDO_BYPASS mode.
Section 2.1.1
JP29
JP32
JP33
1x2 pin header MCU-LINK current measurement circuit jumpers.
Pins 1-2 shorted (default setting)
Section 3.10
JP34 1x2 pin header •Pin 1-2 open: No input voltage to ambient light sensor
•Pin 1-2 shorted (default setting): Input voltage VDDA
connects to ambient light sensor
Section 2.10
JP35 1x3 pin header •Pin 1-2 shorted (default setting): VDD_CORE is sourced
from the DCDC_VDDCORE power supply
•Pin 2-3 shorted: VDD_CORE supply is sourced from P1V1
supply
Note: VDD_CORE is powered by DC-DC, LDO_core is
disabled.
Section 2.1.1
JP36 1x3 pin header •Pin 1-2 shorted (default setting): VDD_LDO_SYS_IN is
sourced from MCU_PWR power supply
•Pin 2-3 shorted: VDD_LDO_SYS_IN supply is sourced
from P1V8 supply
Section 2.1.1
JP37 1x3 pin header •Pin 1-2 shorted (default setting): VDD_BAT is sourced
from the MCU_PWR power supply
•Pin 2-3 shorted: VDD_BAT is sourced from PMIC LDO1_
OUT supply
Section 2.1.1
JP38 1x3 pin header MCU-LINK current measurement circuit jumper
•Pin 1-2 shorted (default setting): MCU_PWR and MCU_
PWR_SRC are sourced from P3V3 supply
•Pin 2-3 shorted: MCU_PWR and MCU_PWR_SRC are
sourced from P1V8 supply
Section 3.10
JP39 1x2 pin header Pin 1-2 shorted (default setting): VDDA is sourced from
VDD_P4 supply
For more information
on this jumper, see
MCX-N9XX-EVK
schematic
JP40 1x2 pin header Pin 1-2 shorted (default setting): VDD_USB is sourced
from the P3V3 power supply
For more information
on this jumper, see
Table 3. MCX-N9XX-EVK jumpers...continued
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Part
identifier
Jumper type Description Reference section
MCX-N9XX-EVK
schematic
JP43 1x3 pin header PMIC reset
•Pin 1-2 shorted (default setting): PMIC reset is supported
through the SW5 push button
•Pin 2-3 shorted: PMIC reset is supported through the SW1
(MCU reset) button
Section 2.1
JP44 1x3 pin header P3V3 source selection
•Pin 1-2 shorted (default setting): ADM7172 LDO is
selected for P3V3 output
•Pin 2-3 shorted: PCA9420 PMIC LDO2 is selected for
P3V3 output
Section 2.1
JP45 2x3 pin header •Pin 1-2 shorted (default setting): VDD_P4 is sourced
from a P3V3 power supply
•Pin 2-3 shorted: VDD_P4 is sourced from P1V8 supply
Note: If VDD_P4 is sourced from P3V3 while MCU_PWR
is sourced by P1V8, P3V3 MUST be sourced from PMIC
LDO2_OUT.
Section 2.1.1
JP46, JP41 1x2 pin header P1V8 source selection
•JP46 pin 1-2 shorted (default setting): PCA9420 PMIC
SW2 is selected for P1V8 output
•JP41 pin 1-2 shorted: PCA9420 PMIC LDO1 is selected
for P1V8 output
Section 2.1
JP47 1x3 pin header •Pin 1-2 shorted (default setting): VDD_P2 is sourced
from a P3V3 power supply
•Pin 2-3 shorted: VDD_P2 is sourced from P1V8 supply
Note: If VDD_P2 is sourced from P3V3 while MCU_PWR
is sourced by P1V8, P3V3 MUST be sourced from PMIC
LDO2_OUT.
Section 2.1.1
JP48 1x2 pin header P1V1 output
•Pin 1-2 shorted (default setting): PCA9420 PMIC SW1 is
selected for P1V1 output
Section 2.1
JP49 1x2 pin header ISP mode enable/disable
•Open (default setting): Normal operation
•Shorted: ISP mode
Section 1.7
JP50 1x2 pin header Ethernet PHY clock input selection
•Pin 1-2 open: Enables crystal oscillator (Y7) to output 50
MHz clock to Ethernet PHY (LAN8741)
•Pin 1-2 shorted (default setting): Disables the crystal
oscillator (Y7) and allows the target MCU to provide a 50
MHz reference clock to Ethernet PHY (LAN8741) through
P1_4/ENET0_TXCLK
Section 2.6
JP51 1x2 pin header Controls the enabling/disabling of the USB power switch
(U26)
•Open: Disconnects pull-up resistor from P0_11/USB0_ID
•Shorted (default setting): Connects pull-up resistor
to P0_11/USB0_ID for enabling USB FS mode in case
P0_11 is used for another function
Section 2.3
Table 3. MCX-N9XX-EVK jumpers...continued
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1.7 Push buttons
Tactile buttons are populated on the MCX-N9XX-EVK board for human machine interaction (HMI). Each of the
SW[4:2] buttons has a 0.1 µF bypass capacitor for debouncing and pads for external pull-up resistors, if desired.
Table 4 describes the MCX-N9XX-EVK push buttons. The push buttons are shown in Figure 3.
Part identifier Switch name Description
SW1 Reset button (MCX N94X 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 D21 turns ON.
SW2 Non-maskable interrupt (NMI)
button
SW2 is designated as the MCX N94X NMI pin (however, the MCX
architecture allows for any of the pins to operate as the NMI pin). It
also acts as a general-purpose input.
SW3 In-system programming (ISP)
mode switch
SW3 is an ISP mode switch (it is a white-colored push button for easy
identification) and can also act as a general-purpose input. It is shared
with the clock output (clkout) header, J16.
Note: The bypass capacitor, C150, affects the clock output (clkout)
performance. To use the clock output function, the C150 capacitor
must be removed.
Note: Apart from the SW3 button, ISP mode can also be enabled or
disabled through the JP49 jumper. For details, see Section 1.6.
SW4 Wakeup button SW4 is a general-purpose input as well as a low-power wake-up unit
(WUU) pin. This allows for demonstration of Power Down and Deep
Power Down applications that use a push button wakeup.
SW5 PMIC reset Pressing this button resets the PCA9420 PMIC if pins 1-2 are shorted
(default configuration) for the JP43 jumper.
SW6 MCU-Link reset Pressing this button resets the MCU-Link processor (LPC55S69).
Table 4. MCX-N9XX-EVK push buttons
Figure 5 shows the circuit diagrams of the MCX-N9XX-EVK push buttons.
Figure 5. Push button circuit diagram
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1.8 LEDs
Table 5 describes the MCX-N9XX-EVK light-emitting diodes (LEDs) that correspond to the target MCU. The
board also has some MCU-Link-specific LEDs, which are described in Section 3.11. The LEDs are shown in
Figure 3.
Part
identifier
LED color LED name / function Description
D22 Red/green/blue RGB LED User application LEDs. Each of these LEDs can be controlled
through a user application.
D24 RED Wi-Fi LED Indicates WLAN status of IW416 Wi-Fi/Bluetooth module
D25 RED Bluetooth LED Indicates Bluetooth status of IW416 Wi-Fi/Bluetooth module
D7 Green 5 V PWR ON Indicates 5 V system power on status. When the board is
powered up, D7 turns ON.
D21 Red Reset LED Indicates system reset activity. When board reset is initiated,
for example, by pressing the SW1 reset button, the D21 LED
turns ON.
Table 5. MCX-N9XX-EVK LEDs
Figure 6 shows the circuit diagram of the RGB LEDs described in Table 5.
Figure 6. RGB LED circuit diagram
The RGB LEDs are powered by the P3V3 rail. However, these LEDs are not included in current measurements
by the MCULink Energy Monitor circuit. These LEDs are controlled by transistors, Q8 and Q9, which allow the
LEDs to operate while being controlled by GPIOs that are powered at a voltage less than P3V3.
2 MCX-N9XX-EVK functional description
This section describes the features and functions of the MCX-N9XX-EVK 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 MCX-N9XX MCU, see MCX N94x, N54x Product Family Data Sheet and MCX
Nx4x Reference Manual.
2.1 Power supplies
The MCX-N9XX-EVK board is powered with a P5V0 (5 V) power supply using one of the following source
options:
•VREG_IN_USB0 supply from full-speed (FS) USB connector (J28)
•VREG_IN_USB1 supply from high-speed (HS) USB connector (J27)
•P5V_HDR_IN supply from 5 V regulator populated at 3-pin jumper (J23) (Not populated by default)
•P5V0 supply from Arduino Shield compatible header, J3 (pin 10)
•P5V_MCU_LINK_USB supply from MCU-Link USB micro-B connector (J5)
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The P5V0 supply is an input power supply for the onboard PCA9420 PMIC (U2) and ADM172 3.3 V regulator
(U54), which provides secondary power supplies. The P5V0 supply also powers up the energy monitoring
analog circuits, FS / HS USB VBUS controllers, and CAN driver.
Many power supplies in the MCX-N9XX-EVK board are connected through jumpers, which can be used to
configure their respective power supplies. This configuration includes enabling/disabling a power supply and
changing the input power source for a power supply.
5 V power sources and selection
The following table describes the 5 V input power sources and their output power supplies.
Part identifier Device / power source Output power supply Description
J5 MCU-Link USB micro-B
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
J28 FS USB connector VREG_IN_USB0 One of the sources for P5V0 (5 V) supply
J27 HS USB connector VREG_IN_USB1 One of the sources for P5V0 (5 V) supply
J23 5 V power regulator
populated at J23
P5V_HDR_IN One of the sources for P5V0 (5 V) supply
J3 (pin 10) Arduino shield
compatible header
P5V0 •Power supply for:
–Onboard PCA9420 PMIC (U2)
–ADM172 3.3 V regulator (U54)
–mikroBUS connector (J22)
–HS and FS USB connectors power
switches (U24 and U26)
–FlexCAN transceiver TJA1057 (U39)
•Power source for:
–P5VA analog power supply
Table 6. 5 V power sources
A 10-pin jumper (J26) is provided on the board to make the 5 V power source selection. By default, the jumper
is set to select a 5 V supply from the MCU-Link USB micro-B connector (J5). For the J26 jumper details, see
Section 1.6. The D7 LED indicates that the 5 V power is available on the board. For the D7 LED details, see
Section 1.8.
Section 2.1 shows the 5 V power selection on the MCX-N9XX-EVK board.
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Figure 7. MCX-N9XX-EVK 5 V power source selection
3.3 V power sources and selection
The following table describes the 3.3 V input power sources and their output power supplies.
Part identifier Device / power source Output power supply Description
U2 PCA9420BSAZ (NXP
Semiconductors)
LDO2_OUT: 3.3 V One of the sources for P3V3 supply
U54 ADM7172 regulator
(Analog Devices)
ADM7172_VOUT: 3.3 V One of the sources for P3V3 supply (default
option)
- LDO2_OUT through
JP44
P3V3
- ADM7172_VOUT
through JP44
P3V3
J3 (pin 8) Arduino shield
compatible header
P3V3
•Power supply for:
–EMV SIM load switch (U48)
–SD card load switch (U56)
–Ethernet transceiver LAN8741 (U37)
through JP4 jumper
–FlexCAN transceiver TJA1057 (U39)
–Dual supply translating transceivers
NTS0302 (U50), NTB0102 (U52),
NTB0101 (U51)
–mikroBUS connector (J19)
–Flex IO header (J20)
–M.2 Key E card connector (J12)
–Crystal oscillator (Y5)
–RGB LED
•One of the sources for VDD_P2 supply
through the JP47 jumper. For details, see
Section 1.6
Table 7. P3V3 power sources
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Part identifier Device / power source Output power supply Description
•One of the sources for VDD_P3 supply
through the JP15 jumper. For details, see
Section 1.6
•One of the sources for VDD_P4 supply
through the JP45 jumper. For details, see
Section 1.6
•One of the sources for VDD_USB supply
through the JP40 jumper. For details, see
Section 1.6
•One of the power sources for VDD_AUDIO
•Power source for the MCU_PWR_SRC
supply through the JP38 jumper. For details,
see Section 1.6
Table 7. P3V3 power sources...continued
The 3.3 V power source for the board is selected by jumper JP44. By default, the ADM172 regulator (U54)
output is selected. For the JP44 jumper details, see Section 1.6. Figure 8 shows the P3V3 power selection on
the MCX-N9XX-EVK board.
Figure 8. P3V3 source selection
1.8 V power sources and selection
The following table describes the 1.8 V input power sources and their output power supplies.
Part identifier Device / power source Output power supply Description
LDO1_OUT: 1.8 V One of the sources for P1V8 supplyU2 PCA9420BSAZ (NXP
Semiconductors) SW2_OUT: 1.8 V One of the sources for P1V8 supply (default
option)
- LDO1_OUT through
JP46 and JP41
- SW2_OUT through
JP46 and JP41
P1V8 •Power supply for:
–Audio codec DA7212 (Not connected by
default)
–EMV SIM load switch (U48) (Not a default
option)
•One of the sources for the VDD_LDO_SYS_
IN supply through the JP36 jumper. For
details, see Section 1.6
•One of the sources for the VDD_P2 supply
through the JP47 jumper. For details, see
Section 1.6
Table 8. P1V8 power sources
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Part identifier Device / power source Output power supply Description
•One of the sources for th eVDD_P3 supply
through the JP15 jumper. For details, see
Section 1.6
•One of the sources for the VDD_P4 supply
through the JP45 jumper. For details, see
Section 1.6
•One of the power sources for VDD_AUDIO
•Power source for the MCU_PWR_SRC
supply through the JP38 jumper. For details,
see Section 1.6
Table 8. P1V8 power sources...continued
The 1.8 V power source for the board is selected by jumpers JP46 and JP41. By default, SW2_OUT is selected.
For the JP46 and JP41 jumpers details, see Section 1.6. Figure 9 shows the P1V8 power selection on the MCX-
N9XX-EVK board.
Figure 9. P1V8 source selection
1.1 V power sources and selection
The following table describes the 1.1 V input power sources and their output power supplies.
Part identifier Device / power source Output power supply Description
U2 PCA9420BSAZ (NXP
Semiconductors)
SW1_OUT Source for P1V1 supply (default option)
- SW1_OUT through
JP48 jumper
P1V1 Source for VDD_CORE through JP35
jumper (Not a default option. for details, see
Section 1.6)
Table 9. P1V1 power sources
The P1V1 power source for the board is selected by jumper JP48. By default, SW1_OUT is selected. For the
JP48 jumper details, see Section 1.6. Figure 10 shows the P1V1 power selection on the MCX-N9XX-EVK
board.
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Figure 10. P1V1 source selection
Once the main power configurations are set, the target MCU power configurations must be made. The MCU
power is configured by a network of jumpers as shown in Figure 11.
These jumpers provide access to insert ammeters in all the supplies connecting to the MCX N94X device. They
also provide a means of connecting external supplies to any of the MCX power pins.
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SHORTING HEADER ON BOTTOM LAYER
Figure 11. Power configuration jumpers
.
The MCX-N9XX-EVK board supports current measurement for board power supplies through the onboard
MCU-Link debug probe. For more details, see Section 3.10.
2.1.1 Power supply configuration
•Table 10 describes the default power jumper configuration for the MCX-N9XX-EVK board.
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Description JP38 JP27 JP35 JP18 JP36 JP31 JP37 JP47 JP15[1] JP45
Dual IO, 3.3 V
and 1.8 V
1-2 1-2 1-2 2-3 1-2 1-2 1-2 1-2 2-3 1-2
Table 10. MCX-N9XX-EVK default power supply configuration
[1] Changing JP15 to 3.3 V requires cutting a cut trace at the bottom of the board and installing a header. If this setting is done, care must be taken to
disconnect or remove the onboard flash device, as this device is a 1.8 V only device.
This configuration is selected to demonstrate the 3.3 V capability and to allow for demonstration of a high-speed
low-power (1.8 V) QSPI flash device.
Table 11 describes the typical power supply configurations for DCDC operation, while Table 12 describes the
typical power supply configurations for LDO operation.
•MCX-N9XX-EVK power supply configurations for DCDC operation
Description JP38 JP27 JP35 JP18 JP36 JP31 JP37 JP47 JP15 JP45
Single supply
operation, IO
@ 3.3 V
1-2 1-2 1-2 2-3 1-2 1-2 1-2 1-2 1-2 1-2
Single supply
operation, IO
@ 1.8 V
2-3 1-2 1-2 2-3 2-3 Open 2-3 2-3 2-3 2-3
Dual IO, 3.3 V
and 1.8 V
1-2 1-2 1-2 2-3 2-3 2-3 1-2
or
2-3
1-2
or
2-3
1-2
or
2-3
1-2
or
2-3
Table 11. Power supply configurations for DCDC operation
•MCX-N9XX-EVK power supply configurations for LDO operation
Description JP38 JP27 JP35 JP18 JP36 JP31 JP37 JP47 JP15 JP45
Single supply
operation, IO
@ 3.3 V
1-2 3-4
5-6
Open 1-2 1-2 1-2 1-2 1-2 1-2 1-2
Single supply
operation, IO
@ 1.8 V
2-3 3-4
5-6
Open 1-2 2-3 Open 2-3 2-3 2-3 2-3
Dual IO, 3.3 V
and 1.8 V
1-2 3-4
5-6
Open 1-2 1-2 2-3 1-2
or
2-3
1-2
or
2-3
1-2
or
2-3
1-2
or
2-3
Table 12. Power supply configurations for LDO operation
2.1.2 DC-DC inductor
The MCX-N9XX-EVK board uses a 1.5 μH DC-DC inductor L1 (Taiyo Yuden LSBHB2520MKT1R5M). The
inductor is enabled when the board is configured in DC-DC Buck mode. Figure 12 shows the DC-DC inductor
circuit diagram of the MCX-N9XX-EVK board.
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