NXP Semiconductors PCF85063TP-ARD User manual

UM11705
PCF85063TP-ARD evaluation board
Rev. 1.0 — 19 November 2021 User manual
Document information
Information Content
Keywords PCF85063TP, I2C-bus, RTC, Arduino port, EVK
Abstract The PCF85063TP-ARD evaluation board is a daughter card equipped with
Arduino port, designated for easy test and design of PCF85063TP IC, tiny
real-time clock/calendar with low power consumption, controlled through
Fm I2C 2-wire bus. The board is fully compliant with IMXRT1050 EVK,
LPCXpresso55S69 and i.MX 8M Mini LPDDR4 EVK, including GUI software
control. The board can be attached to any device equipped with Arduino port.

NXP Semiconductors UM11705
PCF85063TP-ARD evaluation board
Rev Date Description
v.1.0 20211119 Initial version
Revision history
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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.
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1 Introduction
This document describes the PCF85063TP-ARD demo board. The evaluation board
is built around the PCF85063TP IC and works as a daughter card which can be
connected through an Arduino port to various Arduino compatible (including original
Arduino Uno R3) boards. The board is intended to test and measure the characteristics
of the PCF85063TP low power, tiny real-time clock/calendar, produced by NXP
Semiconductors.
The RTC communicates with the controller / microprocessor through a bidirectional
Fm I2C-bus. Among the device under test (DUT) IC, the board is equipped with an
Arduino port and the necessary components for easy testing, shortening the time to
make measurements and check operation of the PCF85063TP IC.
Additionally, the daughter board has software support and a graphical user interface
(Windows platform) for 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 PCF85063TP-ARD evaluation board is at http://http://
www.nxp.com/PCF85063TP-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 PCF85063TP-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 PCF85063TP-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
3.2 Assumptions
Familiarity with the I2C bus is helpful but not required.
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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)
4 Getting to know the hardware
4.1 PCF85063TP-ARD features
•Connector for external access to I2C-bus;
•On-board LED for interrupt pin monitoring;
•Equipped with Arduino Uno R3 port for direct connection with Arduino devices;
•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 PCF85063TP-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 (J5, J6, J35, J36) are located on the bottom
side of the board.
The board was developed around the DUT IC, PCF85038AT (U1, see Figure 1). Using
the Arduino interface, the board ca be attached to any device equipped with Arduino
port. The PCF85063TP-ARD daughter board communicates with the host device or EVK,
through an I2C-bus, with a maximum speed of 400 kHz. The I2C-bus is linked to the
dedicated pins of the Arduino connector (J35) and to on-board connector (J38), allowing
the user to access the I2C-bus from external. For more details about I2C description and
bus transactions, see PCF85063TP datasheet (NXP Semiconductors).
The internal interrupt control of PC85063TP IC (pin 3) is connected to the Arduino
connector J5, pin 3. An on-board LED (D2) can be connected through J24 jumper to the
interrupt line for monitoring purposes. The internal clock signal of PCF85063TP is driven
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out through pin 7 (CLKOUT, push-pull configuration). The CLKOUT pin is connected to
the Arduino connector J4 pin 1 through zero-ohm resistor R35.
The board is powered through the Arduino connector J6 (pin 4 – 3.3V, pin 6, 7 – GND).
The power is delivered to the DUT through J37 (on the PCF85063TP-ARD board).
The purpose of J37 is to facilitate power-off tests and current measurements. If C8
supercapacitor and R32 resistor (both components not populated) will be installed on the
board, the user can test the RTC back-up function of the DUT. The role of R32 is to limit
the charging current of the supercapacitor C8. The on-board LED D1 is power supply
indicator.
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Figure 1. The PCF85063TP-ARD board picture, top view (up), bottom view (down)
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4.3 Schematic diagram
The schematic diagram of PCF85063TP-ARD is available at URL: http://www.nxp.com/
PCF85063TP-ARD.
4.4 Arduino port
J5, J6, J35, and J36 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 uses only four signal lines.
Table 1 shows the pin chart of connectors, and the lines used in the circuit (see also the
SPF-46657.pdf schematic file):
Ref Des # Arduino label PCF85063TP-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
J35 (analog, digital, I2C)
6 A5 / SCL I2C – SCL
1 D0 / RX Not used
2 D1 / TX Not used
3 D2 RTC_INT
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 RTC_CLKOUT
2 D9 / PWM Not used
3 D10 / SS / PWM Not used
4 D11 / MOSI / PWM Not used
J36 (mixed)
5 D12 / MISO Not used
Table 1. The pin chart of Arduino connectors and their usage
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Ref Des # Arduino label PCF85063TP-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 with 3.3 V from Arduino port through J6 and J36. Pin no. 4 of J6
is 3.3 V power supply, while pin no. 6, 7 of J6, and pin no. 7 of J36 represents the power
supply return (ground).
4.5 I2C external connector (J38)
The I2C-bus of the PCF85063TP can be directly accessed from external through the
connector J38, located on the PCF85063TP-ARD daughter board. Table 2 describes the
pin chart of J38.
J38 pin no. Function Comment
1 VCC_3V3 Power supply (3.3 V)
2 I2C_3V3_SDA I2C-bus data (SDA)
3 I2C_3V3_SCL I2C-bus clock (SCL)
4 GND Power supply return (ground)
Table 2. The J38 pin chart
4.6 Jumpers and test points
The board contains two jumpers and several test points. Table 3 and Figure 2 detail
the jumper locations and their default configurations. Table 4 describes the test points
located on the PCF85063TP-ARD board.
Ref Des Label Default Description
ON: Enable the interrupt monitor LED (D2)
J24 INT MONITOR ON / OFF ON OFF: Disable the interrupt monitor LED (D2)
ON: PCF85063TP (U1) power on
J37 RTC power ON / OFF ON OFF: PCF85063TP (U1) power off
Table 3. PCF85063TP-ARD jumpers
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Figure 2. PCF85063TP-ARD Jumper locations
Ref Des Test point / jumper label Description
TP1 CLK OUT CLKOUT (pin 7) of PCF85063TP
TP2 INT INT (pin 3) of PCF85063TP
TP3 SDA SDA (pin 5) of PCF85063TP
TP4 SCL SCL (pin 6) of PCF85063TP
TP5 VCC_3V3 3.3 V power rail
TP6 VCC_5V0 5 V power rail
TP7 VCC_3V3_MAIN 3.3 V – MAIN power rail
TP8 VCC_3V3_RTC 3.3 V – RTC power rail
TP9 GND Ground
TP10 GND Ground
TP11 VCC_Main VCC – MAIN power rail
Table 4. PCF85063TP-ARD test points
5 Installing and configuring software tools
PCF85063TP-ARD evaluation board is designed and built as a daughter board able to
work in conjunction with a mother board equipped with an Arduino port. The board was
built to be fully compatible with the following NXP Evaluation (EVK) boards:
•IMXRT1050 EVK Board
•LPCXpresso55S69 Development Board
•i.MX 8M Mini LPDDR4 EVK Board
Each evaluation/development board benefits by firmware support which can be
downloaded from NXP company site (www.nxp.com/). Before starting, the EVK
motherboard must be programmed with the corresponding firmware package.
Additionally, a GUI application (Windows 10) is available for download from the NXP
site, allowing rapid testing and operation of PCF85063TP-ARD daughter board through
the one of above mentioned EVK. The GUI application is common for all three EVKs
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and for the RTC development board family, manufactured by NXP (PCF85063TP-ARD,
PCF85063AT-ARD and PCF85263ATL-ARD).
For details regarding installation of the EVK firmware and GUI host software on PC
please download EVK_Firmware_And_GUI_Install_Guide_For_Arduino_Boards.pdf
instruction file from NXP site (www.nxp.com/). Once the software is installed, the first
step is to select the correct combination EVK – PCF85063TP-ARD daughter card, and
then the board can be controlled from the GUI interface. See Section 6 and Section 7 for
more details regarding the operation of PCF85063TP-ARD from GUI software.
6 Configuring the hardware
6.1 Using the PCF85063TP-ARD with an IMXRT1050 EVK board
Figure 3 shows the required hardware for operation of the PCF85063TP-ARD daughter
board with IMXRT1050 EVK. The following items are necessary:
•One IMXRT1050-EVK board
•One PCF85063TP-ARD daughter board
•One USB-A / USB Micro-B cable
•A PC with Windows 10 operating system
The IMXRT1050 EVK mother board can be powered by one of the three methods:
•Connecting an external 5VDC 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 (500mA),
before establishing the communication, use an external power supply (connected to J2).
From J1 on the EVK board (see Figure 3) the user can select the power configuration
for the mother board. For further details, refer to the MIMXRT1050 EVK Board Hardware
User’s Guide.
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Figure 3. PCF85063TP-ARD daughter board and IMXRT1050 EVK board, before starting
To configure the hardware and workstation, complete the following procedure:
1. 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 will be placed in position 1-2.
2. Insert the PCF85063TP-ARD daughter card on the Arduino connector of the EVK
(see Figure 4).
3. Using USB connector J28, connect the EVK board to a USB port of the computer.
4. Install the IMXRT1050 target firmware (download from NXP site and see UM11581,
Arduino Arduino shields GUI and firmware installation manual for step-by-step
instructions).
5. Install GUI application (see UM11581, Arduino shields GUI and firmware installation
manual).
6. Open the GUI application to operate the device from the PC. For details regarding
GUI operation see Section 7.
Figure 4 shows the boards during the operation.
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Figure 4. The assembly PCF85063TP-ARD daughter board / IMXRT1050 EVK board operation
6.2 Using the PCF85063TP-ARD with an LPCXpresso55S69 development
board
Figure 5 shows the required hardware for operation of the PCF85063TP-ARD and
LPCXpresso55S69 EVK board. This configuration consists of:
•One LPCXpresso55S69 EVK board
•One PCF85063TP-ARD daughter board
•One USB-A / USB Micro-B cable
•A PC with Windows 10 operating system
The LPCXpresso55S69 development board is equipped with four USB Micro-B
connectors: P5, P6, P9 and P10. The board can be powered through any USB port.
Using P6 USB connector to connect the board to the PC simplifies the start-up operation
because P6 is designated for debugging and the USB cable thus accomplishes two tasks
at the same time: powering the board, and serving as a data link between the EVK board
and PC. For more details regarding power-up and operation of the LPCXpresso55S69
development board, see the LPCXpresso55S69/LPCXpresso55S28 Development Board
User Manual here.
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Figure 5. PCF85063TP-ARD daughter board and LPCXpresso55S69 mother board, before starting
The following steps describe how to assemble, program, and operate the configuration
shown in Figure 5.
1. Insert the PCF85063TP-ARD daughter card to P16 – P19 connectors located
on LPCXpresso55S69 development board (see the marked pins of P16 – P19,
Figure 5);
2. Connect the development board using port P6 USB port of PC;
3. Install the LPCXpresso55S69 target firmware (download from NXP site and read the
EVK_Firmware_And_GUI_Install_Guide_For_Arduino_Boards.pdf instruction file);
4. Install GUI application on PC (see the instruction file called out in the previous step);
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5. Open the GUI application to operate the device from the PC. For details regarding
GUI operation see next section 8 “GUI description”;
Figure 5 shows the two boards in operation.
Figure 6. PCF85063TP-ARD daughter board / LPCXpresso55S69 mother board operation
6.3 Using the PCF85063TP-ARD with an i.MX 8M Mini LPDDR4 EVK
board
When an i.MX 8M Mini LPDDR4 EVK board is used with the PCF85063TP-ARD board, a
third board (IMX8MMINI-IARD interposer board) must be used, especially designed and
built as EVK – daughter board interconnection. The EVK board i.MX 8M Mini LPDDR4
is not equipped with an Arduino port; instead it has a 2 x 20 pin expansion connector
(J1003, see i.MX 8M Mini LPDDR4 EVK user manual). J1003 is a multipurpose port,
containing various digital I/O lines, including specialized I2C and SPI buses. Starting from
the expansion connector pin chart, an Arduino port interposer board was developed,
with the role of signal-to-signal bridge between the 2 x 20 connector pins on the i.MX
8M Mini LPDDR4 EVK and the mated connectors of the Arduino port present on the
PCF85063TP-ARD daughter board.
To operate the setup, along with the EVK and the daughter board, a third board must be
included in the setup assembly. Figure 7 shows the necessary boards and how these
boards are connected. The configuration consists of:
•One i.MX 8M Mini LPDDR4 EVK board
•One PCF85063TP-ARD daughter board
•One IMX8MMINI-IARD interposer board
•One USB-A / USB-C cable
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•One USB-A / USB Micro-B cable
•A PC with Windows 10 operating system
It is recommended to attach the PCF85063TP-ARD to the Arduino connectors of the
IMX8MMINI-IARD interposer board first, and then the resulting assembly to the i.MX 8M
Mini LPDDR4 EVK. This can be done by plugging J1 connector located on the interposer
board to J1003 connector on the EVK.
To power-up the EVK, a USB-C type cable connected to PORT 2 of the EVK is used.
The power switch SW101 on the EVK board must be set to ON position to power-up the
setup. Data communication is achieved by routing a separate USB (Micro-B type) cable
from a USB port on the PC to debug port (J901) on the EVK (see Figure 7 and Figure 8).
The user may find details regarding power-up and operation of the setup assembly in
8MMINILPDDR4-EVK user manual and IMX8MMINI-IARD User Manual. The files can be
downloaded from www.nxp.com/.
Figure 7. The assembly PCF85063TP-ARD daughter board, IMX8MMINI-IARD interposer board, and i.MX 8M Mini
LPDDR4 EVK, before starting
To configure and operate the setup, follow the below steps:
1. Insert the PCF85063TP-ARD onto the IMX8MMINI-IARD interposer board Arduino
connectors (located on the top side);
2. Attach IMXMMINI-IARD connector plug J1 (located on the bottom of the board) into
J1003 expansion board located on the top side of i.MX 8M Mini LPDDR4 EVK (see
Figure 8);
3. Power-up the EVK board using a USB Type C cable attached to PORT 2;
4. Connect the EVK to the PC, using a USB Micro-B cable, attached to J901 debug
port;
5. Place SW101 in ON position to power-up the boards;
6. Install the MIMXRT1050 target firmware (download UM11581, Arduino shields GUI
and firmware installation manual from NXP site);
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7. Install GUI application on the PC (see the instruction file referred in the above step);
8. Open the GUI application to operate the device from the PC. For details regarding
GUI operation see Section 8 “GUI description”;
Figure 8. PC85063TP-ARD daughter board / i.MX 8M Mini LPDDR4 EVK board operation
6.4 Using PCF85063TP-ARD with another device
The PCF85063TP-ARD daughter board can be operated with other EVK board, which
has an Arduino port. There are two options to connect the board: using other EVK
equipped with an Arduino port, and an EVK without Arduino port. In the first case, a
firmware shall be developed according with PCF85063TP specifications, and then simply
attach PCF85063TP-ARD daughter board to the EVK, to operate the board. In the
second case, using the pin chart of Arduino connectors (Table 1), make the necessary
electrical connections (for power, I2C-bus and control lines), and develop the desired
firmware, assuring that it is compliant with IC specifications. Use PCF85063TP datasheet
to read details about internal registers of the DUT IC and data exchange between internal
controller and the EVK. Assure for correct electrical connections and avoid data conflicts
on the signal lines, to prevent IC damage.
7 GUI description
A GUI application is available for the three EVK boards from NXP Semiconductors.
The application is common for all EVKs and the development boards of the RTC family,
produced by NXP Semiconductors (PCF85063TP, PCF85063A, and PCF85263A).
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This section describes the GUI application and how the user can control the
PCF85063TP-ARD daughter board from the graphical interface. First, install the GUI
package and software on the PC (Windows 10). For more details, see UM11581.
Once installation is complete, assure that one of the mentioned three EVKs with
attached PCF85063TP-ARD daughter board is connected to PC and powered-on. Open
NXP_GUI(PCF85063TP,PCF85263ATL,PCF85063A) GUI application. An interface will
appear as is shown in Figure 9.
The GUI application starts with Settings tab (marked with red arrow). The left side of the
window displays Board settings. The section provides the following settings:
• Select EVK: displays the list of EVKs. Selecting a wrong EVK board causes the
connection to fail and a pop-up window with the message: “Unable to Connect with
EVK” appears on the screen.
• Select COM port: displays the port selected for communication. The port is
automatically selected by the system (in the picture is COM 3).
• Select Board: allows the user to select the correct daughter board (the application
can support three different boards). In Figure 9, the selected board is PCF85063TP.
Selecting a wrong daughter board causes the connection to fail and a pop-up window
with the message: “Unable to Connect with Daughter Card” appears on the screen.
In the right side of the window is located Device Setting section. In this section a single
setting is available, I2C Frequency, which sets the I2C-bus clock to 100kHz or 400kHz.
Assuming the correct parameters are chosen, clicking the Connect button establishes
the connection with the EVK. In the bottom side of the GUI window a status bar shows in
real time the status regarding connection between PC and the EVK.
Figure 9. Graphical interface at start-up (“Settings” tab activated by default)
Clicking on Time tab, a new window appears (see Figure 10). From this tab, the time
and calendar functions of the RTC are available. For the calendar section, the following
internal registers of PCF85063TP can be read or written: Weekday, Day, Month, and
Year. For the time section the user can set or read: Hour, Minute, and Second.
The Write button which set the RTC registry with the new values by the user from the
GUI, while the Read button brings back the data from the RTC to the GUI. The third
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button Set PC Time allow the user to set the RTC registers with the current time of
the PC. For more details about the register map of the RTC, see the PCF85063TP
datasheet.
In the upper side, in the blue region (marked with red arrow), the date and time of the
RTC is displayed in real time.
Figure 10. Graphical interface – “Time” tab activated
The Configuration tab, is accessing the control and offset registers of the PCF85063TP.
Figure 11 shows the interface of the Configuration tab. From left to right, the user can
control the following registers:
• Control Register1 – register address: 00h;
• Control Register2 – register address: 01h;
• Offset Register – register address: 02h;
See the PCF85063TP datasheet for more details about the control / offset registers of
the RTC. In the upper / right side of the blue region (marked with red arrow) the interrupt
indicator is monitoring in real time the INT output (pin 3) of the RTC.
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User manual Rev. 1.0 — 19 November 2021
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NXP Semiconductors UM11705
PCF85063TP-ARD evaluation board
Figure 11. Graphical interface – “Configuration” tab activated
The RAM tab (Figure 12) allows for direct setting or reading the value of the internal RAM
byte of the RTC. The data can be introduced by the user in four modes. Setting each bit
in low or high, introducing hex, or decimal values, or by using the graphical slider (the
blue arrow in Figure 12).
Figure 12. Graphical interface – “RAM” tab activated
UM11705 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2021. All rights reserved.
User manual Rev. 1.0 — 19 November 2021
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