AD5940 GPIO0 Pin Clarification

Hi,

GP0 is pin F5 of AD5940:

Its jumper is marked as GP0 on board.

Hi Akila,

Thanks for your reply. But I did not find F5 on the board so I am just wondering how should I connect to GPIO0. I only find its jumper on the board but have no idea which pin of those two is GPIO0.

Thanks,

Peter

GPIO0 is connected to D2 via GP0.

D2 goes to P4 Arduino connector

Thank you so much Akila! Now I understand it!

Btw, if I choose GPIO0 as the interrupt output from AD5940, should I unplug the jumper of GPIO0? Is there any way to configure it as an interrupt with code? The datasheet says GPIO0,3 and 6 can be configured as interrupt output.

GPIO0, 3, 6 can be configured as interrupts with Interrupt controller 0.

You may refer to example codes in Github:

Typical GPIO configuration:

AGPIOCfg_Type gpio_cfg;

gpio_cfg.FuncSet = GP0_INT|GP2_SYNC;
gpio_cfg.InputEnSet = AGPIO_Pin2;
gpio_cfg.OutputEnSet = AGPIO_Pin0|AGPIO_Pin2;
gpio_cfg.OutVal = 0;
gpio_cfg.PullEnSet = 0;
AD5940_AGPIOCfg(&gpio_cfg);

If jumper is unplugged, GP0 doesn't go anywhere in the circuit.

Thank you so much Akila! One last question, I am connecting AD5940 with nRF52832 via flywire and I looked it up in the datasheet. If I understand correctly, I need to connect AVDD/DVDD to VDD and AGND/DGND to GND and other SPI pins. Now the ID I read is incorrect and I think the reason is the connection of AVDD/DVDD/AGND. Could you please tell me how to connect those pins? Really appreciate it!

Hi,

There is a reference in Analog Wiki that shows how ADuCM029 baseboard is interfaced with EM9304 (counterpart to nRF2832) 

EVAL-ADICUP3029 Base Board [Analog Devices Wiki]

Kindly refer to this to get an idea of how nRF52832 can be interfaced.

If using EVALAD5940BIOZ kit,

- AD5940 interfaces with ADuCM3029 baseboard via SPI0

- Bluetooth SOC interfaces with ADuCM3029 via SPI2.

Hi Akila,

Thanks for your reply, I am using EVALAD5940ELCZ kit, are they the same? Does the Bluetooth SOC interface with ADuCM3029 via a specific SPI? I am using SPI0 for now.

Hi,

  EVALAD5940ELCZ interfaces with ADuCM3029 via SPI0.

Hence SPI2 can be used for interfacing Bluetooth SOC with ADuCM3029 baseboard.