NXP Semiconductors
UM12036
MCX-N9XX-EVK Board User Manual
Pin
number
Device pin /
GPIO
Default function Secondary function Tertiary
function
Potential conflict
• FlexIO header J20, pin 17
2 ANA_0 /
ADC0_A0
- - - -
3 OPAMP0_INN CURA.N - - -
4 ANA_1 /
ADC0_B0
- - - -
5 P4_16 CURB.P FlexIO GPIO • USB1_OTG_PWR
• FlexIO header J20, pin 21
6 P0_14 ADC - - Arduino J2 connector pin 3
(R949)
7 OPAMP1_INN CURB.N - - -
8 P0_22 ADC - - Arduino J2 connector pin 5
(R951)
9 P4_20 CURC.P FlexIO - FlexIO header J20, pin 25
10 P0_15 ADC - - -
11 OPAMP2
INN
CURC.N - - -
12 P0_23 ADC - - -
Table 26. Arduino compatible header J4 pinout...continued
2.13 FlexIO header
On the MCX-N9XX-EVK board, one 28-pin FlexIO header is provided to support the LCD display and camera
applications. Table 27 describes the pinout of the FlexIO header.
The FlexIO header is intended to support the Mikroe TFT Proto 5” Capacitive display and the LCD-PAR-S035
display. These displays support 3 V I/O only, therefore, care must be taken to ensure that all pins used on this
connector are configured for 3V3 operation (this includes Ports 0, 1, 2 and 4).
Many signals on the FlexIO connector are shared signals (most notably with the M.2 connector). Before using
the FlexIO connector with other modules, be sure to check the schematics to determine if there are overlapping
signals with the other modules intended to be used and that the necessary FlexIO signals are correctly selected
via the zero-ohm resistor selections. Note that the FlexIO connections are connected by default.
Pin
number
Net name GPIO Function Potential conflict
1 P3V3 - - -
2 GND - - -
3 I2C2_SCL / SIOC P4_1 I2C SCL -
4 I2C2_SDA / SIOD P4_0 I2C SDA -
5 LCD_INT P4_6 Interrupt pin -
6 LCD_GPIO P1_11 General-purpose I/O
pin
• Accelerometer sensor (I3C1_
PUR)
Table 27. FlexIO header J20 pinout
UM12036 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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