NXP Semiconductors UM11760 User manual

UM11760
PCA8561AHN-ARD evaluation board
Rev. 1.0 — 21 April 2022 User manual
Document information
Information Content
Keywords PCA8561AHN, I2C-bus, LCD, segment driver Arduino port, EVK
Abstract The PCA8561AHN-ARD evaluation board is a daughter card equipped with
Arduino port, designated for easy test and design of PCA8561 IC, automotive
18x4 LCD segment driver. The board is fully compliant with IMXRT1050
EVK, LPCXpresso55S69 (LPC55S69-ECK) and i.MX 8M Mini LPDDR4 EVK
(8MMINILPD4-EVK, 8MMINID4-EVK), including GUI software control. The
board can be attached to any device equipped with an Arduino port.

NXP Semiconductors UM11760
PCA8561AHN-ARD evaluation board
Rev Date Description
v.1.0 20220421 Initial version
Revision history
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PCA8561AHN-ARD evaluation board
Important notice
IMPORTANT NOTICE
For engineering development or evaluation purposes only
NXP provides the product under the following conditions:
This evaluation kit 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 board may be used with any
development system or other source of I/O signals by connecting it to the
host MCU computer board via off-the-shelf cables. This evaluation board
is not a Reference Design and is not intended to represent a final design
recommendation for any particular application. Final device in an application
heavily depends 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. In order 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.
UM11760 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2022. All rights reserved.
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NXP Semiconductors UM11760
PCA8561AHN-ARD evaluation board
1 Introduction
This document describes the PCA8561AHN-ARD evaluation board. The evaluation board
is built around the PCA8561, automotive 18x4 LCD segment driver, produced by NXP
Semiconductors. The evaluation board serves as a daughter card that can be connected
through an Arduino port to various Arduino compatible (including original Arduino Uno
R3) EVK / mother boards with the purpose of testing and measuring the characteristics of
the PCA8561AHN Device Under Test (DUT).
The PCA8561 IC is an 18x4 LCD segment driver, automotive grade, is built in two
variants: the PCA8561AHN equipped with I2C-bus, and PCA8561BHN equipped with
SPI-bus. The PCA8561AHN-ARD daughter board is equipped with the I2C-bus version
of the LCD driver. The DUT (PCA8561AHN) drives the on-board LCD display “DE301-
RS-20/6.35”, and is controlled from the mother board through the Arduino port. The
board allow the user to test and measure the static and dynamic characteristic of the
PCA8561 IC for different configurations specified in the datasheet. The power supply is
provided from the same Arduino port.
Additionally, a Graphical User Interface (Windows platform) is provided to facilitate the
evaluation of the daughter board. The GUI is used with the following NXP evaluation
boards: IMXRT1050 EVK Board, LPCXpresso55S69 Development Board and i.MX 8M
Mini LPDDR4 EVK Board.
2 Finding kit resources and information on the NXP web site
NXP Semiconductors provides online resources for evaluation board and its supported
device(s) on http://www.nxp.com.
The information page for PCA8561AHN-ARD evaluation board is at http://http://
www.nxp.com/PCA8561AHN-ARD. The information page provides overview information,
documentation, software and tools, parametrics, ordering information and a Getting
Started tab. The Getting Started tab provides quick-reference information applicable
to using the PCA8561AHN-ARD evaluation board, including the downloadable assets
referenced in this document.
2.1 Collaborate in the NXP community
The NXP community is for sharing ideas and tips, ask and answer technical questions,
and receive input on just about any embedded design topic.
The NXP community is at http://community.nxp.com.
3 Getting ready
Working with the PCA8561AHN-ARD requires the kit contents, additional hardware, and
a Windows PC workstation with installed software.
3.1 Kit contents
•Assembled and tested evaluation board in an antistatic bag
•Quick Start Guide
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NXP Semiconductors UM11760
PCA8561AHN-ARD evaluation board
3.2 Assumptions
Familiarity with the I2C bus is helpful but not required.
3.3 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.
3.4 Minimum system requirements
This evaluation board requires a Windows PC workstation. Meeting these minimum
specifications should produce great results when working with this evaluation board.
•Computer with Windows 10
•One USB port (either 3.0 or 2.0 or 1.1 compatible)
•One of three EVK boards (MIMXRT1050-EVK, LPC55S69-EVK, 8MMINILPD4-EVK)
along with the associated firmware / GUI software
•USB cable for power and data connection between PC and EVK board (if not included
in the EVK package)
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NXP Semiconductors UM11760
PCA8561AHN-ARD evaluation board
4 Getting to know the hardware
4.1 PCA8561AHN-ARD features
•Equipped with Arduino Uno R3 port for direct connection with Arduino devices;
•On-board reset switch;
•On-board jumpers for I2C address;
•Fully compliant with IMXRT1050 EVK board, including GUI (Windows 10);
•Fully compliant with LPCXpresso55S69 dev. board, including GUI (Windows 10);
•Compliant with i.MX Mini LPDDR4 EVK board, including GUI (Windows 10);
Note: For i.MX Mini LPDDR4 EVK Board is necessary to use IMX8MMINI-IARD
interposer board between the EVK and PCA8561AHN-ARD daughter board (see
IMX8MMINI-IARD User Manual).
4.2 Kit featured components
Figure 1 identifies the main components on the board. The main elements are called out
in the picture. The Arduino port connectors (J1, J4, J5, J6) are located on the bottom side
of the board.
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NXP Semiconductors UM11760
PCA8561AHN-ARD evaluation board
Figure 1. The PCA8561AHN-ARD board picture, top view (up) and bottom view (down)
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NXP Semiconductors UM11760
PCA8561AHN-ARD evaluation board
4.3 Schematic diagram
The schematic diagram of PCA8561AHN-ARD is available at URL: http://www.nxp.com/
PCA8561AHN-ARD.
4.4 Arduino port
J1, J4, J5, and J6 are the mated pin headers of Arduino Uno R3 connectors, having the
same electrical function and placed on the board, so that the daughter board can be
directly inserted in the Arduino port. The daughter card is using only four signal lines.
Table 1 represents the pin chart of connectors, and the lines used in the circuit (see also
the SPF-46661_A.pdf schematic file):
Ref Des # Arduino label PCA8561AHN-ARD function
1 NC Not used
2 IOREF Not used
3 RESET Not used
4 3.3V Not used
5 5V Power supply
6 GND Power supply return
7 GND Power supply return
J6 (Power)
8 Vin Not used
1 A0 Not used
2 A1 Not used
3 A2 Not used
4 A3 Not used
5 A4 / SDA I2C – SDA
J1 (analog, digital, I2C)
6 A5 / SCL I2C – SCL
1 D0 / RX RST
2 D1 / TX CLK_CONN
3 D2 Not used
4 D3 / PWM Not used
5 D4 Not used
6 D5 / PWM Not used
7 D6 / PWM Not used
J5 (digital, UART, PWM)
8 D7 Not used
1 D8 Not used
2 D9 / PWM Not used
3 D10 / SS / PWM Not used
4 D11 / MOSI / PWM Not used
J4 (mixed)
5 D12 / MISO Not used
Table 1. The pin chart of Arduino connectors and their usage
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NXP Semiconductors UM11760
PCA8561AHN-ARD evaluation board
Ref Des # Arduino label PCA8561AHN-ARD function
6 D13 / SCK Not used
7 GND Power supply return
8 AREF Not used
9 A4 / SDA Not used
10 A5 / SCL Not used
Table 1. The pin chart of Arduino connectors and their usage...continued
The circuit is supplied from Arduino port through J6 and J4. Pin no. 4 of J6 is 3.3 V power
supply while pin no. 5 of J6 is 5 V power supply. Pin no. 6, 7 of J6, and pin no. 7 of J4
represents the power supply return (ground).
4.5 LCD driver
Figure 2 shows the LCD driver and display section of PCA8561AHN-ARD schematic
diagram. The DUT (U1) is controlled through the I2C-bus (A5 / SCL and A4 / SDA,
Arduino connector J1). The I2C port of PCA8561AHN are pin 8 for SCL, and pin 9 for
SDA. R15 and R16 are the I2C pull-up resistors.
The reset input (U1, pin 5) can be activated locally by pressing the on-board switch SW1,
or remote from the GUI software through the Arduino port (connector J5, pin 1).
The PCA8561 IC has an internal clock that can also be clocked externally. The external
clock is provided from the EVK through pin 2 of the Arduino connector J5. When the
internal clock is used, the CLK pin of DUT (U1, pin 7) can be configured as output which
provides the clock signal. In this case, the jumper header J10 shall be removed. When
the external clock is used, J10 shall be installed, and U1 configured to work with external
clock.
The PCA8561 drives the “DE301-RS-20/6.35” LCD display (U2). The U2 has an eight-
character display, but the driver controls only four (most significant) characters.
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NXP Semiconductors UM11760
PCA8561AHN-ARD evaluation board
Figure 2. PCA8561AHN-ARD – LCD driver (up), LCD display (down)
4.6 Power supply
Figure 3 depicts the power supply section of schematic diagram (SPF-46661_A.pdf
file). The board is supplied with 3.3 V, and 5 V, both voltages being supplied by the
Arduino port. LED D1 is the 3.3 V power supply indicator (VCC_3V3_MAIN power net).
The LED D3 is the 5V power supply indicator and D2 is 5 V power supply indicator
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