Getting Started with the PCAL9722HN-ARD Evaluation Board

Last Modified: Jul 17, 2024Supports PCAL9722HN-ARD

Contents of this document

  • 1

    Out of the Box

  • 2

    Get Hardware

  • 3

    Install Software

  • 4

    Configure Hardware

Purchase your PCAL9722HN-ARD

Contents of this document

1. Out of the Box

The NXP analog product development boards provide an easy-to-use platform for evaluating NXP products. The boards support a range of analog, mixed-signal and power solutions. They incorporate monolithic integrated circuits and system-in-package devices that use proven high-volume technology. NXP products offer longer battery life, a smaller form factor, reduced component counts, lower cost and improved performance in powering state-of-the-art systems.

This page will guide you through the process of setting up and using the PCAL9722HN-ARD evaluation board.

1.1 Kit Contents and Packing List

The kit contents include:

  • Assembled and tested the evaluation board in an antistatic bag
  • Quick Start Guide

1.2 Additional Hardware

In addition to the kit contents, the following hardware is necessary when working with this board.

  • Oscilloscope
  • Multimeter for current/voltage measurement
  • PC for running GUI

NextGet Hardware

2. Get Hardware

2.1 Board Features

  • A complete evaluation platform for the PCAL9722HN, ultra low-voltage translating 22-bit SPI I/O expander with Agile I/O features, interrupt output and reset
  • Easy to use GUI based software demonstrates the capabilities of the PCAL9722HN
  • On-board LEDs, 7 segment display and key switches for PCAL9722HN general purpose I/O evaluation
  • Convenient test points for easy scope measurements and signal access
  • USB interface to the host PC
  • Power supply from USB port or external power supply can be used to power PCAL9722HN-ARD evaluation board

2.2 Board Description

The PCAL9722HN evaluation board features a 22-bit general purpose I/O expander that provides remote I/O expansion for most microcontroller families via the SPI interface. The board can be connected in parallel with other SPI-bus demo boards to create an evaluation system.

The IC communicates to the host via the industry standard SPI-bus port. The evaluation software runs under Microsoft Windows 7, 8 and 10 PC platform.

2.3 Board Components

PCAL9722HN-ARD evaluation board is connected to the LPC55S69-EVK MCU board using four connectors (J4/J5/J11/J12 on PCAL9722HN-ARD board and P16/P17/P19/P18 on LPC55S69-EVK board) for SPI-bus and power supply.

The LPC55S69-EVK MCU board communicates with PCAL9722HN demo GUI through PC USB port and uses SPI to communicate to PCAL9722HN.

Figure 1. PCAL9722HN-ARD Evaluation Board

Figure 1. PCAL9722HN-ARD Evaluation Board

PreviousOut of the Box
NextInstall Software

3. Install Software

3.1 Install Software

Installing software is necessary to work with this evaluation board.

  • Double click on “setup.exe” to install PCAL9722HN-ARD demo GUI
  • Click “Next” button three times to complete installation

Figure 2. PCAL9722HN-ARD Demo Setup

PreviousGet Hardware
NextConfigure Hardware

4. Configure Hardware

Figure 3 presents a typical hardware configuration.

Use P10 (USB micro-B connector) on LPC55S69-EVK for power supply and GUI communication port.

Figure 3. PCAL9722HN-ARD Evaluation Board Connecting to the LPC55S69-EVK MCU Board

Figure 3. PCAL9722HN-ARD Evaluation Board Connecting to the LPC55S69-EVK MCU Board

4.1 Hardware Description

  • J4/J5/J11/J12 are connected to the LPC55S69-EVK MCU board for PCAL9722HN-ARD power supply and SPI-bus interface
  • JP1 selects user LED on/off
  • JP2 selects internal or external +5 V power supply
  • JP3 selects internal or external VDD_SPI power supply
  • JP4 selects internal or external VDD_P power supply

Table 1. PCAL9722HN-ARD EV board main components

Device Description Location
PCAL9722HN I3C, SPI-bus, 0.5 °C accuracy, digital temperature sensor U3
7 segment display Displaying number D11
NCP117ST33T3G 5 V to 3.3 V LDO U1
Red LED Power supply on LED D10

Table 2. Jumper settings

Jumper Default Setting Comment
J4, J5, J11, J12 - Arduino connector
J1 - External 5 V power supply pins
J2, J3 - Ground test pins
J6, J7, J13, J8, J9, J14, J10, J15 On User LED current measurement pins
J16 - External VDD_SPI power supply pins
J17 - External VDD_P power supply pins
J18 1-2 SPI CS 0-2 select pins
J19 - Port 0 and 1 test pins
J20 1-2 SCK test pin
J23 1-2 SDIN test pin
J24 1-2 SDOUT test pin
J21, J22, J25, J26, J27, J28, J29, J30 1-2 7 segment display test pins
J31 - Port 2 test pins
J32 2-3 ADDR select pin
J33 - External MCU connector
J34, J35, J36, J37, J38, J39 1-2 Key switch test pins
JP1 1-2 User LED on/off select pin
JP2 2-3 Internal or external +5 V power supply select pin
JP3 2-3 Internal or external VDD_SPI power supply select pin
JP4 2-3 Internal or external VDD_P power supply select pin

PreviousInstall Software
NextDesign Resources

Design Resources

Board Information

Additional References

In addition to our PCAL9722: Low-Voltage Translating 22-Bit SPI I/O Expander page, you may also want to visit:

Application pages:

Other related products:

PreviousConfigure Hardware