NXP Semiconductors PCA9955BTW-ARD, Руководство пользователя, Страница: 20 / 38

NXP Semiconductors
UM11761
PCA9955BTW-ARD evaluation board
6. Install the MIMXRT1050 target firmware (download UM11581, Arduino shields GUI
and firmware installation manual from NXP site);
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 7 ;
Figure 10. PCA9955BTW-ARD daughterboard / i.MX 8M Mini LPDDR4 EVK board operation
6.4 Using PCA9955BTW-ARD with another device
The PCA9955BTW-ARD daughterboard 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 PCA9955B specifications, and then simply
attach PCA9955BTW-ARD daughterboard 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, I
2
C-bus and control lines), and develop the desired
firmware, assuring that is compliant with IC specifications. Use PCA9955B 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 three EVKs described in Section 6 .
This section describes the GUI application and how the user can control the
PCA9955BTW-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 mentioned three EVK with attached
PCA9955BTW-ARD daughterboard is connected to PC and powered-on. Open
“NXP_GUI (PCA995x)” GUI application. An interface will appear as is shown in Figure 11 .
UM11761 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2022. All rights reserved.
User manual Rev. 1.0 — 18 March 2022
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