PCF2131 datasheet(22/31 Pages) NXP

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NXP Semiconductors

UM11597

PCF2131-ARD evaluation board

Figure 14. PCF2131-ARD daughterboard connected to Aardvark I2C / SPI host adapter

7 GUI description

This section describes the GUI application for the three mentioned EVKs and how the

user can control the PCF2131-ARD daughterboard 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 three EVKs with attached PCF2131-

ARD daughterboard is connected to a PC and powered-on. Open PCF2131 RTC GUI

application. An interface appears as shown in Figure 15:

The GUI application starts with

Settings tab (marked with red arrow). The left side of the

window displays the following settings:

• COM port: displays port selected for the communication. The port is automatically

selected by the system (in the picture is COM 39).

• I2C speed: displays the I2C-bus clock frequency (100 kHz, and 400 kHz).

• SPI Speed: displays the SPI-bus clock frequency (2 MHz, and 6 MHz).

• I2C and SPI buttons: allows the user to select the type of communication.

• Connect: initiate the connection to the EVK / daughterboard device.

• Init Board: initiate the daughterboard.

In the right side of the window is located

Device settings field. The following settings are

provided:

• SW Reset (SR): initiate the software reset.

• CLR Prescaler (CPR): clear the Prescaler register.

• CLR Timestamp CTS): clear the Timestamp register.

• Hour Mode: select the hour display mode (12 / 24).

• Int A/B Mode: select the interrupt type of signal (voltage level / pulse).

• 100th Seconds Counter: enable / disable the 100th seconds counter

• Read: allow the user to read the internal registers of the DUT.

Near to each button (on the right side, or under) the register address and the bit number

is displayed. See the PCF2131TF datasheet for more details about register map of the

DUT IC.

In the bottom side of the GUI window a log window displays the communication process

between the PC and the EVK / daughterboard device. The window can be cleared from

UM11597

All information provided in this document is subject to legal disclaimers.

User manual

Rev. 1.0 — 15 September 2021

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