PNEV5190BP control with External MCU - MISO not behaving We need to use PN5190B2 chip in our target application. For the same, we have started using PNEV5190BP dev kit. Initially we checked with NFC cockpit tool, we are able check basic things. As we need it to be interfaced with external MCU, I have connected R7, R6 and removed R5. Also to make signals as 3.3v , i have removed 1.8v and connected R20. After this, we have interfaced GND, MOSI, MISO, CLK, VEN and CS to the port JP1. other pins are NC. with this connections and SPI mode 0 Configuration, I am sending the version read request and I am not getting expected response, MISO stays high. I probed all the signals and came to know that MISO pin is not changing, neither the IRQ is changing on VEN button press. I am using 5V-2A Ext power supply. Further I have also observed that MISO pin follows the behavior of Chip select pin (When CS pin goes low, MISO goes high and vice a versa). MCU is a BLE SoC dev kit. I need to know apart from GND, MOSI, MISO, CLK, CS, VEN and IRQ pins, do we need to connect any other pins externally ? I suspect the NFC part boot up is not done and it is staying some unhandled state. Please provide the solution on priority. Re: PNEV5190BP control with External MCU - MISO not behaving Hello @Habib_MS, Thanks for pointing to this application note. Currently we are following the exact same connection at our side. we tried following the library porting as well. But before that we wanted to be sure that the nfc chip replies over SPI. Which is not happening. The IRQ pin stays low, VUP pins shows voltage around 1V (approx). Can we have any other inputs that we can try ? Re: PNEV5190BP control with External MCU - MISO not behaving Hello @tanmay_chauk, Please refer to AN13425, which explains how to connect an external MCU to the PN5190, including the required hardware rework. Although this app note was developed for the RT1170-EVK, it can be used as a reference for your design. Please let me know if you have any further questions. BR Habib Re: PNEV5190BP control with External MCU - MISO not behaving Hello @tanmay_chauk, In order to support you better, could you please share a photo of your PN5190BP, as well as captures of your SPI signals including the IRQ and VEN pins when you send a command? You can use a logic analyzer or oscilloscope. BR Habib Re: PNEV5190BP control with External MCU - MISO not behaving Is there any news on this issue? We seem to face a similar issue. We also followed the application notes and moved R5 to R7, as well as R19 to R20. In addition, the red led LED3 blinks red at power up. Re: PNEV5190BP control with External MCU - MISO not behaving Hello,
Would this not help?
https://community.nxp.com/t5/NFC-Knowledge-Base/How-to-connect-external-PN5190-to-PNEV5190BP-Evaluation-Board/ta-p/2171639 BR
Tomas
記事全体を表示