AD5755-1 SPI communication problem

Hello,

I am trying to run AD5755-1 evaluation board using SPI communication via on-board J11 pin. 

I have a board supports SPI communication.

The board has SPI header (please check the attached image) but I don't know how to correctly connect SPI header and on-board J11 pin of AD5755-1 evaluation board.

As I know, 4-wire is needed for SPI communication, MOSI, MISO, SCK, and SS.

What pin of the on-board J11 should be connected to each wire? 

Also, I would appreciate it if you let me know the detail description for each pin of on-board J11 pin (DV_DD, DGND, SYNC, SCLK, SDIN, SDO, LDAC, etc.).

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  • Hi younjaeng,

    I didn't realize that you are limited with your digital lines and that it can only function either for SPI communication or a GPIO.

    Since this is the case, you should use:

    MOSI (pin1):SDIN

    SS0(pin5):SYNC

    MISO(pin3):SDO

    SCK(pin7):SCLK

    GPIOB0(pin2):LDAC

    GPIOB2(pin4):CLEAR

    GPIOB4(pin6):FAULTB

    GPIOB6(pin8):ALERT

    For the POC and RESETB, you can use just connect it to either a logic "0" or "1".

    For DVDD, you can connect an external supply to provide power to this pin.

    Best regards,

    Rainier

Reply
  • Hi younjaeng,

    I didn't realize that you are limited with your digital lines and that it can only function either for SPI communication or a GPIO.

    Since this is the case, you should use:

    MOSI (pin1):SDIN

    SS0(pin5):SYNC

    MISO(pin3):SDO

    SCK(pin7):SCLK

    GPIOB0(pin2):LDAC

    GPIOB2(pin4):CLEAR

    GPIOB4(pin6):FAULTB

    GPIOB6(pin8):ALERT

    For the POC and RESETB, you can use just connect it to either a logic "0" or "1".

    For DVDD, you can connect an external supply to provide power to this pin.

    Best regards,

    Rainier

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