PN7642 devKit SPI pinout location

[asknxp]

Hi there,

We are working on PN7642 devKit (https://www.nxp.com/products/rfid-nfc/nfc-hf/nfc-readers/development-kit-for-pn7642-secure-compact-n...) to implement the SPI communication between PN7642 and our linux host. Do we have any information about how to wire up the SPI interface with generic board's SPI master node.

I saw J56(SPIA) and J58(SPIM). What are those pinouts for? I am not sure if those are the pinouts that can connect to my board(e.g raspberry pi) running SPI master mode.

Any insight?

Thank you very much.

--Kenny

[EduardoZamora · Accepted solution]

Hello @asknxp

Hope you are doing well.

From the Schematics that can be found in OM27642 product page > Design files, you could use Header J36. SPI pins should correspond as follows:
Pin 10 - CLK
Pin 12 - MISO
Pin 14 - MOSI
Pin 16 - CS

Also, please make sure to select the proper Host Interface. More information on this can be found in the PN76 family evaluation board quick start guide, Section 3.1.4.1 Host Interface selection.

Regards,
Eduardo.

[asknxp]

Hi Eduardo,

I have the following question for you. Hopefully, you do not mind.

I have simply loaded sample application fw(pnev7642fama_pn76_hostif_spi) and tried to test the loopBack TLV command.

Here is the command we sent.

7F 00 00 20 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F

It seems the PN7642 did not receive the command. Any insight? Do we need to do anything besides SPI wiring?

Thank you very much.

--Kenny