Hi, the external crystal frequency is 24.806MHz.
What's is your application with OpenIMU300za?
thanks.

1.The OpenIMU300RI is data output silent, you should give a package rate to the unit to output data, for instance send command via serial interface:
update output rate to 10hz, 55 55 75 50 0C 04 00 00 00 0A 00 00 00 00 00 00 00 74 22
or change output rate to 100Hz, 55 55 75 50 0C 04 00 00 00 64 00 00 00 00 00 00 00 67 8B
2. visit develop tool for more informantion
https://developers.aceinna.com/devices/connect

@Sanjay-Adkar You could download nav-view, connect EVAL-KIT DMU381 with PC with Micro USB line, and start logging using nav-view. please refer to link

3. .0x4/6/8 is xyz_rate, 0xA/C/E is xyz_accel. both register could be read in polling mode.

@Amin Hi Amin, you could send command to 300ZI unit via User uart interface(VG_AHRS, INS appication), and get the debug log from debug uart interface as below. As for the debug port, OpenIMU user could refer to UART debug port.

@Sylvain-Joyeux you should use VG_AHRS application and try again. the IMU application does not support Mag calibration with python driver.

Hi Sylvain Joyeux,
I checked the OpenIMU330ZI with firmware version VG_AHRS 1.1.3, it work normally on mag align process from my side as below, please reset IMU and test. Note: please do keep connection with PC during the mag align process or it will be never finish in case of disconnected.

Hi PineTreeWild,
It will take less than 10s to finish the sync with 1PPS in the begining.
The sync process is that:

• CPU detects sync pulse and measures it’s period with sub-microsecond precision

• If period is within 0.01% of target value for few consecutive periods signal considered to be valid and system will sync to it.