PCAL9722HN Evaluation Board

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Product Information

Specifications:

• Product Name: PCAL9722HN-ARD Evaluation Board

• Model: UM12075

• Features: 22-bit general purpose I/O expander via SPI
  interface

• Compatibility: Most microcontroller families

• Platform: Microsoft Windows 7, 8, 10 PC platform

Product Usage Instructions:

1. Introduction:

The PCAL9722HN-ARD evaluation board is designed for testing the
PCAL9722HN, a 22-bit general purpose I/O expander. It allows remote
I/O expansion for various microcontroller families through the SPI
interface. The board can be used alongside other SPI-bus demo
boards for evaluation purposes.

2. Features:

The PCAL9722HN-ARD evaluation board offers the following
features:

• 22-bit general purpose I/O expander
• Remote I/O expansion for microcontroller families
• Industry standard SPI-bus port communication
• Compatible with Windows 7, 8, and 10 PC platform

3. Getting Ready:

Before using the PCAL9722HN-ARD evaluation board, ensure you
have the following:

• Kit contents as per the package
• Additional hardware if required
• Windows PC workstation with necessary software installed

3.1 Kit Contents:

The kit should contain all necessary components for operating
the evaluation board.

3.2 Additional Hardware:

Any extra hardware required for specific applications should be
prepared in advance.

3.3 Assumptions:

Familiarity with the SPI-bus is beneficial but not mandatory for
using this evaluation board.

FAQ:

Can I use the PCAL9722HN-ARD evaluation board with any

microcontroller family?

The board is designed to provide remote I/O expansion for most
microcontroller families via the SPI interface.

What operating systems are compatible with the evaluation

software?

The evaluation software runs on Microsoft Windows 7, 8, and 10
PC platforms.

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UM12075
PCAL9722HN-ARD evaluation board
Rev. 1.0 — 13 June 2024

User manual

Document information

Information

Content

Keywords

PCAL9722HN, ultra low-voltage translating 22-bit SPI I/O expander with Agile I/O features, interrupt output and reset

Abstract

The PCAL9722HN-ARD evaluation board is easy to test and designed for the PCAL9722HN which is a 22-bit general purpose I/O expander that provides remote I/O expansion for most microcontroller families via the SPI interface. The PCAL9722HN-ARD uses the LPC55S69-EVK MCU board to provide an easy to use evaluation platform.

NXP Semiconductors

UM12075
PCAL9722HN-ARD evaluation board

IMPORTANT NOTICE
For engineering development or evaluation purposes only
NXP provides the product under the following conditions:
This evaluation kit or reference design is for use of ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY.
It is provided as a sample IC pre-soldered to a printed circuit board to make it easier to access inputs, outputs, and supply terminals. This evaluation kit or reference design may be used with any development system or other source of I/O signals by connecting it to the host MCU or computer board via off-the- shelf cables. Final device in an application will be heavily dependent on proper printed circuit board layout and heat sinking design as well as attention to supply filtering, transient suppression, and I/O signal quality.
The product provided may not be complete in terms of required design, marketing, and or manufacturing related protective considerations, including product safety measures typically found in the end device incorporating the product. Due to the open construction of the product, it is the responsibility of the user to take all appropriate precautions for electric discharge. To minimize risks associated with the customers’ applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. For any safety concerns, contact NXP sales and technical support services.

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1 Introduction
The PCAL9722HN-ARD 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.

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2 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

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3 Finding kit resources and information on the NXP web site
NXP Semiconductors provides online resources for the evaluation board and its supported device(s) on http:// www.nxp.com.
The information page for PCAL9722HN-ARD evaluation board is at http://www.nxp.com/PCAL9722HN-ARD. The information page provides overview information, documentation, software and tools, parametric, ordering information and a Getting Started tab.
The Getting Started tab provides quick-reference information applicable to using the PCAL9722HN-ARD evaluation board, including the downloadable assets referenced in this document.

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4 Getting ready

Working with the PCAL9722HN-ARD evaluation board requires the kit contents, additional hardware, and a Windows PC workstation with installed software.

4.1 Kit contents
· Assembled and tested evaluation board in an antistatic bag · Quick Start Guide

4.2 Additional hardware
In addition to the kit components, the following hardware is necessary or beneficial when working with this kit.
· Oscilloscope · Multimeter for current/voltage measurement · PC for running GUI

4.3 Assumptions
Familiarity with the SPI-bus is helpful but not required.

4.4 Static handling requirements

CAUTION

This device is sensitive to ElectroStatic Discharge (ESD). Therefore care should be taken during transport and handling. You must use a ground strap or touch the PC case or other grounded source before unpacking or handling the hardware.

4.5 Minimum system requirements
· PC Pentium processor (or equivalent) · One USB port (either 3.0 or 2.0 or 1.1 compatible) · Windows 7, 8, 10 · OM13089 MCU board (from www.nxp.com)
4.6 Power requirements
The LPC55S69-EVK MCU board obtains power from the PC USB port, two USB parts can be connected to the LPC55S69-EVK MCU board simultaneously. Please use external power supply option if exceeding the USB port current capabilities.

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5 Hardware installation
5.1 PCAL9722HN-ARD EV board and LPC55S69-EVK MCU board connection
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-EVKboard) for SPI-bus and power supply. The LPC55S69-EVKMCU board communicates with PCAL9722HN demo GUI through PC USB port and uses SPI to communicate to PCAL9722HN.

Figure 1.PCAL9722HN-ARD evaluation board

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Use P10 (USB micro-B connector) on LPC55S69-EVK for power supply and GUI communication port. Figure 2.PCAL9722HN-ARD evaluation board connecting to the LPC55S69-EVK MCU board

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6 Hardware description

· J4/J5/J11/J12 are connected to the LPC55S69-EVKMCU board for PCAL9722HN-ARD power supply and SPI-bus interface.
· JP1 selects user LED on/off. · JP2 selects internal or external +5V 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

PCAL9722HN

I3C, SPI-bus, 0.5 °C accuracy, digital temperature sensor

7 segment display

Displaying number

NCP117ST33T3G

5V to 3.3V LDO

Red LED

Power supply on LED

Location U3 D11 U1 D10

Table 2.Jumper settings

Jumper

Default setting

J4, J5, J11, J12

J1

J2, J3

J6, J7, J13, J8, J9, On J14, J10, J15

J16

J17

J18

1-2

J19

J20

1-2

J23

1-2

J24

1-2

J21, J22, J25, J26, 1-2 J27, J28, J29, J30

J31

J32

2-3

J33

J34, J35, J36, J37, 1-2 J38, J39

JP1

1-2

JP2

2-3

JP3

2-3

JP4

2-3

Comment Arduino connector External 5V power supply pins Ground test pins User LED current measurement pins
External VDD_SPI power supply pins External VDD_P power supply pins SPI CS 0-2 select pins Port 0 and 1 test pins SCK test pin SDIN test pin SDOUT test pin 7 segment display test pins
Port 2 test pins ADDR select pin External MCU connector Key switch test pins
User LED on/off select pin Internal or external +5V power supply select pin Internal or external VDD_SPI power supply select pin Internal or external VDD_P power supply select pin

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7 Schematic
The schematic diagram of PCAL9722HN-ARD is available at URL: http://www.nxp.com/PCAL9722HN-ARD.

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8 PCAL9722HN demo GUI
8.1 Install PCAL9722HN-ARD Demo GUI
· Double click on “setup.exe” to install PCAL9722HN-ARD demo GUI. · Click “Next” button three times to complete installation.

8.2 Run PCAL9722 Demo GUI on Windows 7, 8, and 10 PC
1. Double click on “PCAL9722 Demo” icon to start GUI.

2. Select proper COM port (last COM port normally) and click “Connect” button to connect LPC55S69-EVK board.

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3. Use Setting tab to select SPI speed, and click on the “Init Board” button.

4. Use Register tab “Read Register button” to read out PCAL9722 internal register data and “Save to File” button to save data in a file.

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5. Use 7 Segment Display tab to run number up/down on display automatically, or select fix number to be shown on display.

6. Use LED tab to set GPIO drive strength and turn on/off 8 LEDs.

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7. Use Switch tab to set input port latch, polarity, pull-up/down settings, and read button to read in key switch statue.

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9 Abbreviations

Table 3.Abbreviations

Acronym

Description

ESD

Electro Static Discharge

GUI

Graphical User Interface

SPI-bus

Serial Peripheral Interface bus

IC

Integrated Circuit

LED

Light Emitting Diode

PC

Personal Computer

USB

Universal Serial Bus

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10 References
1. PCAL9722HN, Ultra low-voltage translating 22-bit SPI I/O expander with Agile I/O features, interrupt output and reset; NXP Semiconductors

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11 Revision history

Table 4.Revision history Document ID
UM12075 v.1.0

Release date 13 June 2024

Description · Initial version

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PCAL9722HN-ARD evaluation board

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Legal information
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Tables

Tab. 1. Tab. 2.

PCAL9722HN-ARD EV board main components ………………………………………………. 9 Jumper settings ………………………………………….9

Tab. 3. Abbreviations ……………………………………………15 Tab. 4. Revision history ………………………………………..17

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Figures

Fig. 1.

PCAL9722HN-ARD evaluation board …………….7

Fig. 2.

PCAL9722HN-ARD evaluation board connecting to the LPC55S69-EVK MCU board ……………………………………………………….. 8

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Contents

1

Introduction ……………………………………………… 3

2

Features …………………………………………………… 4

3

Finding kit resources and information

on the NXP web site ………………………………….5

4

Getting ready …………………………………………… 6

4.1

Kit contents ………………………………………………..6

4.2

Additional hardware ……………………………………. 6

4.3

Assumptions ……………………………………………… 6

4.4

Static handling requirements ……………………….. 6

4.5

Minimum system requirements ……………………..6

4.6

Power requirements …………………………………….6

5

Hardware installation ……………………………….. 7

5.1

PCAL9722HN-ARD EV board and

LPC55S69-EVK MCU board connection ……….. 7

6

Hardware description ……………………………….. 9

7

Schematic ………………………………………………. 10

8

PCAL9722HN demo GUI …………………………..11

8.1

Install PCAL9722HN-ARD Demo GUI …………. 11

8.2

Run PCAL9722 Demo GUI on Windows 7,

8, and 10 PC …………………………………………… 11

9

Abbreviations …………………………………………. 15

10

References ………………………………………………16

11

Revision history ………………………………………17

Legal information …………………………………….18

UM12075
PCAL9722HN-ARD evaluation board

Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’.

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For more information, please visit: https://www.nxp.com

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