NXP Semiconductors
UM11623
PCA9959HN-ARD evaluation board
7 Configuring the hardware
7.1 Using the PCA9959HN-ARD with MIMXRT1050-EVK board
shows the required hardware for operation of the PCA9959HN-ARD daughter
board with MIMXRT1050-EVK.
The following hardware is necessary when working with this kit:
•
One MIMXRT1050-EVK board
•
One PCA9959HN-ARD daughter board
•
One USB-A/USB Micro-B cable
•
A PC with Windows 10 operating system
The MIMXRT1050-EVK mother board can be powered by one of the following three
methods:
•
Connecting an external 5 VDC power supply to the barrel power connector (J2) on the
board
•
Connecting a USB cable from the PC to the Micro-B USB connector (J9) on the board
•
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 (500 mA),
before establishing the communication, use an external power supply (connected to J2).
From J1 on the EVK board (see
), the user can select the power configuration for
the mother board. For more details, see
.
Figure 6. PCA9959HN-ARD daughter board and MIMXRT1050-EVK board
To configure the hardware and workstation, complete the following procedure:
1. On the MIMXRT1050-EVK board, populate R278, R279, R280, R281 with zero-ohm
resistors (0402 package) to link the SPI lines to the Arduino connector (see Note in
).
2. Configure the suitable power configuration of EVK (J1). If using J28 for power supply,
the J1 jumper shall be placed in position 5-6. If using an external power supply
(connected to J2), the jumper J1 is placed in position 1-2.
UM11623
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© NXP B.V. 2021. All rights reserved.
User manual
Rev. 1 — 21 May 2021
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