This post is older than 2 years and might not be relevant anymore
More Info: Consider searching for newer posts

SD Card And NRF52832

Hello. I have a breakout board (SMARTMP3 VS1053) and it has also a slot for memory card, so I connect the wires (SCK, MOSI, MISO and CS) to my nrf52832, but it can't see the memory card (i'm using the FATFS example). However, when I connect directly SD CARD with wires to nrf52832 it works fine.

Parents
  • Hi, 

    Your board have a TXB0106 Voltage-Level Translator to support 5V signals from Arduino and other platforms. If you have set the board in 5V mode (Jumper J1), the VCC input of port B of the level translator is most likely connected to 5V. The specifications say Logic High Signal is minimum 0.65 x VCC = 0.65 x 5V = 3.25V. The GPIOS of the nRF52832 might not provide this level. On our DK it is usually between 2.8 and 3.0V.

    Have you cheked the position of the jumper, and could you try setting it to 3.3V if it was set to 5V?

    Best regards,
    Jørgen

Reply
  • Hi, 

    Your board have a TXB0106 Voltage-Level Translator to support 5V signals from Arduino and other platforms. If you have set the board in 5V mode (Jumper J1), the VCC input of port B of the level translator is most likely connected to 5V. The specifications say Logic High Signal is minimum 0.65 x VCC = 0.65 x 5V = 3.25V. The GPIOS of the nRF52832 might not provide this level. On our DK it is usually between 2.8 and 3.0V.

    Have you cheked the position of the jumper, and could you try setting it to 3.3V if it was set to 5V?

    Best regards,
    Jørgen

Children
Related