The NXP analog product development boards provide an easy-to-use platform for evaluating NXP products. The boards support a range of analog, mixed-signal and power solutions. They incorporate monolithic integrated circuits and system-in-package devices that use proven high-volume technology. NXP products offer longer battery life, a smaller form factor, reduced component counts, lower cost and improved performance in powering state-of-the-art systems.
This page will guide you through the process of setting up and using the PCAL6416AEV-ARD board.
The PCAL6416AEV-ARD kit contents include:
Familiarity with the I2C bus is helpful but not required.
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.
This evaluation board requires a Windows PC workstation. Meeting these minimum specifications should produce great results when working with this evaluation board.
The evaluation board is built around the PCAL6416A, low-voltage translating, 16-bit I2C-bus/SMBus I/O expander with interrupt output, reset and configuration registers, 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 PCAL6416A Device Under Test (DUT).
Overview of the PCAL6416AEV-ARD board
PCAL6416A-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:
Each evaluation / development board benefits by firmware support which can be downloaded from the NXP company site. 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 PCAL6416AEV-ARD daughter board through the one of above mentioned EVK. The GUI application is common for all three EVKs and for the PCAL6xxx I/O expander development card family, manufactured by NXP (PCAL6408A, PCAL6416A, PCAL6524 and PCAL6534 ICs). Once the software is installed, the first step is to select the correct combination EVK - PCAL6416AEV-ARD daughter card, and then the board can be controlled from the GUI interface.
Figure 1 shows the required hardware for operation of the PCAL6416AEV-ARD daughter board with IMXRT1050 EVK. The following items are necessary:
The IMXRT1050 EVK mother board can be powered by one of the three methods:
J2) on the board
J9) on the board
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) that are not able to deliver the necessary current (500 mA), before establishing the communication, use an external power supply (connected to
J1 on the EVK board (see Figure 1) the user can select the power configuration for the mother board. For further details, refer to the
MIMXRT1050 EVK Board Hardware User's Guide.
To configure the hardware and workstation, complete the following procedure:
J1). If using
J28for power supply, the
J1jumper shall be placed in position 5-6. If using an external power supply (connected to
J2), the jumper
J1will be placed in position 1-2
J28, connect the EVK board to a USB port of the computer
Figure 2 shows the boards during the operation.
Figure 3 shows the required hardware for operation of the PCAL6416AEV-ARD and LPCXpresso55S69 EVK board. This configuration consists of:
The LPCXpresso55S69 development board is equipped with four USB Micro-B connectors:
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
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.
The following steps describe how to assemble, program and operate the configuration shown in Figure 3.
P19connectors located on LPCXpresso55S69 development board (see the marked pins of
P19, Figure 5)
P6USB port of PC
Figure 4 shows the two boards in operation.
When an i.MX 8M Mini LPDDR4 EVK board is used with the PCAL6416AEV-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 PCAL6416AEV-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 5 shows the necessary boards and how these boards are connected. The configuration consists of:
It is recommended to attach the PCAL6416AEV-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 5 and Figure 6).
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/.
To configure and operate the setup, follow the below steps:
J1(located on the bottom of the board) into
J1003expansion board located on the top side of i.MX 8M Mini LPDDR4 EVK (see Figure 5).
SW101in ON position to power up the boards.
The PCAL6416AEV-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 to PCAL6416A specifications, and then simply attach PCAL6416AEV-ARD daughter board to the EVK to operate the board. In the second case, using the pin chart of Arduino connectors, make the necessary electrical connections (for power, I2C-bus and control lines), and develop the desired firmware, assuring it is compliant with IC specifications. Use PCAL6416A data sheet 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.
In addition to our PCAL6416A: Low-Voltage Translating 16-Bit I2C-Bus/SMBus I/O Expander, you may also want to visit: