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Enquiry about mcu_safety_error pin
Added by Rajkumar Dumala 3 days ago
Hello there,
Question 1. For the MitySOM AM62A, is the pin MCU_SAFETY_ERRORn connected to the PMIC ?
Question 2. Can you explain the logic of SOM Power Monitor circuit (U1 / LTC2945HUD-1#PBF) in your carrier board ? We have implemented a carrier board ourselves and would like to skip this circuit.
Regards
Replies (2)
RE: Enquiry about mcu_safety_error pin - Added by Michael Williamson 3 days ago
Hello,
The MCU_ERRORn signal is not connected to the PMIC. It is pulled low on the board via a 4.7K resistor.
You do not need to include the LTC2945HUD-1#PBF in your design, but should remove it's entry in the device tree you boot from. We implemented that circuit for convenience as many people evaluating the SOM would like to understand / measure the main current draw at the SOM power interface.
With regards,
Mike
RE: Enquiry about mcu_safety_error pin - Added by Rajkumar Dumala 2 days ago
Hi Mike,
Thank you for your response.
We are working with the SDL (Safety Diagnostic Library), and as part of this, we have enabled DCC, ECC, and MCRC as per our requirements. Now, we are moving on to BIST (PBIST/LBIST).
As we understand, BIST can be executed either as a standalone R5 application or during the SBL flow. Could you please guide us on how to run PBIST/LBIST during the SBL stage?
Best regards,
RajKumar
