Hi,
I'm trying to use ICM-42688-P on a DK-42688-P board as a standalone and integrate it with a PIC32. I've received the following response from the support team:
3. To use the ICM-42688-P from the DK board, you will need to
a. Hook up ground from MCU board to DK-42688-P board.
b. Provide voltage to the ICM-42688-P on J3. If VDD and VDDIO are the same, you can just put a jumper on pins 1 and 2 and power from the same voltage.
c. If using SPI, you can connect MISO to CN4 Pin 7, MOSI to CN3 Pin 4, SCLK to CN3 Pin 6, and CS to CN5 Pin 8.
d. If you need interrupt, you can connect INT1 to CN4 Pin 1
e. Make sure there are no jumpers on J1 (Pins 1-2, Pins 3-4)
I've verified all the connections, now I notice a 2.1V signal on FSYNC and MISO lines. Changed R4 and R19 to a 1M Ohm resistor and eliminated this 2.1V signal issue.
I'm unable to communicate with the ICM, the MISO line follows my CS line i.e., however I try to control my CS line, the MISO line is also changing in the exact same way. Can anyone explain this behavior? How can I verify that the ICM is functional?
Regards,
Naina