About JVale.2

JVale.2 · 2023-10-11

Hi.I am Jose Manuel. We have developed a custom board where the MCU is STM32H735IGT6, the external SRAM is APS12808L-3OBMX-BA and the external flash is W25Q128JVEIM.The problem is that we want to work with 100 MHz, but it does not work, it just work ...

JVale.2 · 2021-05-26

Dear Sir/Madame, I am using X-NUCLEO-NFC03A1 connected to our MCU (NXP Kinetis). The communication protocol used is SPI and it works well (sends and receives echo). Therefore, we would like to read a text on the smartphone in "NDEF tag emulator" mode...

JVale.2 · 2023-11-28

Hi everyone,We have redesigned the board trying to set the impedance of the lines to 50 ohms and followed the steps in document AN4661 (section 8.4.3). The result has improved, we can work up to 120 MHz.Thanks for your helps.José Manuel

JVale.2 · 2023-10-24

Hello,1. The length of the signals are equal, approximately 51 mm. Our possible failure is the impedance, so we will modify the widht of the signals.2. Layer 1 is TOP (red), layer 2 is GND, layer 3 is PWR (3.3V), layer 4 is BOTTOM (blue). According t...

JVale.2 · 2023-10-20

Hello everyone,Data is read correctly up to 60 MHz, above 60 MHz it is not read correctly. We have spent time on the codes and we have gotten this far. We need 100 MHz to work well on a 5" sceen (with 60 MHz and a 3.5" screen, it works well).So, we t...

JVale.2 · 2023-10-17

Hello,Thanks for your replys.The resistors are 33 ohms, only we have modified the resistor of the CLK to 250 ohms because it works better.We think that the problem is in the impedance because the width of the routes is 0.2mm, so according to the impe...

JVale.2 · 2021-05-27

Dear BT,Today I have put these commands and I have come to read a text! You can get a free application called "NDEF Tag Emulator" in Play Store, it could be interesting for you.On the other hand, What steps do you recommend for us to check until you ...

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Problem with high speed in a custom board with STM32H735IGT6

CR95HF file NDEF not found

Re: Problem with high speed in a custom board with STM32H735IGT6

Re: Problem with high speed in a custom board with STM32H735IGT6

Re: Problem with high speed in a custom board with STM32H735IGT6

Re: Problem with high speed in a custom board with STM32H735IGT6

Re: CR95HF file NDEF not found