NXP Semiconductors

UM11597

PCF2131-ARD evaluation board

5. Connect power and host controller

a. Apply 5V power to J5 using a micro USB cable and plug in Aardvark/Promira/FTDI

host controller cable to J4.

(Note: Make sure 5V supply is plugged in before

connecting the host controller cable).

b. Or Plug J11 and J12 into a microcontroller’s Arduino headers and supply the

microcontroller kit with USB power through the PC.

Figure 7. PCF2131-ARD daughterboard, initial hardware setup

6.1.1 Using PCF2131-ARD with IMXRT1050 EVK board

Figure 8 shows the required hardware for operation of the PCF2131-ARD daughterboard

with IMXRT1050 EVK. The following items are necessary:

• One IMXRT1050-EVK board

• One PCF2131-ARD daughterboard

• One USB-A / USB Micro-B cable

• A PC with Windows 10 operating system

The IMXRT1050 EVK motherboard can be powered by one of three methods:

1. Connecting an external 5VDC power supply to the barrel power connector (J2) on the

board

2. Connecting a USB cable from the PC to the Micro-B USB connector (J9) on the board

3. Connecting a USB cable from the PC to the USB connector (J28) on the board. When

the PC is connected in this fashion, the USB port can simultaneously act as a debug

interface. Therefore, by using a single USB cable connected to J28, the EVK can be

powered and at the same time linked to the PC for data exchange.

The older USB ports (from PC) are not able to deliver the necessary current (500mA);

before establishing the communication, use an external power supply (connected to J2).

From J1 on the EVK board (see Figure 6) the user can select the power configuration

for the motherboard. For further details, download the IMXRT1050 EVK Board Hardware

UM11597

All information provided in this document is subject to legal disclaimers.

© NXP B.V. 2021. All rights reserved.

User manual

Rev. 1.0 — 15 September 2021

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