PCF2131 datasheet(19/31 Pages) NXP

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NXP Semiconductors

UM11597

PCF2131-ARD evaluation board

6.1.3 Using PCF2131-ARD with i.MX 8M Mini LPDDR4 EVK board

When an i.MX 8M Mini LPDDR4 EVK board is used with the PCF2131-ARD board,

a third board (IMX8MMINI-IARD interposer board) must be used, designed and built

as an EVK – daughterboard 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 PCF2131-

ARD daughterboard.

To operate the setup, along with the EVK and the daughterboard, a third board must be

included in the setup assembly. Figure 12 shows the necessary boards and how these

boards are connected. The configuration consists of:

• One i.MX 8M Mini LPDDR4 EVK board

• One PCF2131-ARD daughterboard

• One IMX8MMINI-IARD interposer board

• One USB-A / USB-C cable

• One USB-A / USB Micro-B cable

• A PC with Windows 10 operating system

It is recommended to attach the PCF2131-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 12 and

Figure 13).

Details regarding power-up and operation of the setup assembly can be found in the

8MMINILPDDR4-EVK user manual and IMX8MMINI-IARD User Manual. The files can be

downloaded from www.nxp.com/.

UM11597

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

User manual

Rev. 1.0 — 15 September 2021

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PCF2131 Datasheet(PDF) 19 Page - NXP Semiconductors