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AFE 4490 and Arduino connection problem

Sandra Cossul
Prodigy 35 points
Other Parts Discussed in Thread: AFE4490

Hi

I am connecting the AFE4490EVM and the Arduino board. So, what I did was to remove the resistors of the SPI wires (R35, R33, R29 and R31) and connect them to Arduino using a logic level converter. Also, I connected the GND of the two boards.
It seems that Afe4490 is working since I am measuring 0.75V on TX_REF, 1V on BG pin, 0.9 on VCM pin and 4MHZ on CLKOUT, and I was able to write and read from one register.

My problem is that the LED isn’t blinking when the sensor is connected, so I can’t get sensor values.

I did nothing about the AFE_PDN and AFE_RESET pins, since they must drive logic high and I am measuring 3 V, is that right?  Should I change something in hardware or in my code?  Maybe a software  initialization in order to turn on the LED of the sensor? Do I need to connect  AFE_PDN and AFE_RESET pins to the Arduino board?


Thanks in advance