Hello ,
We are exploring options to exercise our AVSBUS controller and have identified the above PMIC and the corresponding EVAL Board : EVM3698-BH-02A.
We dont see an explicit mention of the AVSBUS support in the eval board guide or in the software used in association.
My query is on how was the AVSBUS port exercised on this IC and are there any drivers or aligned applications available which can be shared?
Hello,
I would encourage you to read into the MPM3698 datasheet for more detail on the AVSBus mechanisms as there is significantly more detail here than anywhere else regarding the subject matter of your question.
Here is what the datasheet provides in terms of supporting AVSBus on page 27 and 28:
For any driver specific inquiries, I would encourage you to submit a ticket using the following link:
Contact MPS - Technical Information Contact
Let me know if I can clarify on anything while you read through the datasheet. Hope this provided some insight.
Best,
Krishan
Hello Krishnan,
Thank you for the reply will go through the Datasheet.
A few follow up queries:
In the EVal Board’s Datasheet/User guide there is mention of a DC Load being used. Is this strictly necessary for exercising the AVSBUS communications?
Hello again Sadhan,
Yes, please read through the datasheet and let me know if there are any specific AVSBus questions that you may have.
I don’t think you need a load for exercising AVSBus communications. Although the majority of what is communicated is load dependent like current, temps, and transition rates.
Best,
Krishan
Hello Krishnan,
Is there sequence to be followed either through Virtual bench pro or manually via the register tool window to enable AVSBUS mode?
Hello Krishan,
I further see no option to enable the AVSBUS Mode from the GUI.
The operation mode does not allow to change the mode to avsbus as show in the datasheet.
I see, this isn’t showing up in the operation options. Does scrolling down in the tab of options show this mode as a configurable setting? If not, are you able to set these bits manually to 6’b 1011 xx for AVSBus mode?
Also, are you writing to volatile memory or non-volatile memory?Also, is the AVSBus addresses enabled? Be sure to do so with bits 8 and 9 set to 1’b1. Let me know if the option shows up in the operation tab after doing so. If this has already been done, then please also follow up.
Hi Krishan,
I’m writing to the volatile memory, i dont need updates after power on.
Yes, I’ve enabled the addresses for both rails and set rail addresses then wrote the same to RAM, I can confirm it has taken effect as the register map reflects it.
I still dont see the option in the drop down menu for AVSBUS.
To write manually, I figure I need to use the register tool.
So this is the sequence I want to try :
- Set PAGE (0 ) by setting |slave address 0x1B | register address 0x00| Data to 0x0|
- Write to the operation mode register by |slave address 0x1B | register address 0x00| Data to 0xB2| this would set mode to avsbus
Is there a better way to set page from the tool , because I dont see it on the register map or the settings window
Please see your emails associated with this account. This is to ensure you receive more direct support.
Best,
Krishan
Hello Krishan,
I don’t see any email from MPS in my inbox, could you let me know what the email domain is?
You should see local MPS contacts reaching out to you sometime early next week on Monday. Please reach out to me if you still don’t see a message by then.
I figure more localized support will help if this issue is more complex than initially thought and would surely lead to a faster fix to this issue.
Best,
Krishan
Hello Krishan,
No one has reached out to me yet.
BR,
Sadhan
Thank you for letting me know Sadhan, I’ll push on my resources then. By the way, have there been any updates here at all?
Best,
Krishan
Hi Krishan,
Could you confirm the method I commented about earlier to program the mode manually? I can try it out.
I don’t want to accidentally break things.
The manual method that you postulated shouldn’t break things. I see no problem with this. Have you tried things out yet?
Also, has someone reached out to you yet?
Best,
Krishan
Hello Krishan,
I was tied up with other tasks I will try this method out.
Someone has reached out via email but we haven’t made much progress yet , over the past week, the team which reached out have confirmed that there is no way to enable AVSBUS from the GUI without commenting on how to get it done manually.
Thanks for confirming these details with me Sadhan, I’m glad you have finally heard back from the focused team. I will advise the team that has reached out to you on next steps.
Have you tried alternatives to configure this register via a USB to I2C interface to write 6’b 1011 xx to enable AVSBus mode? Depending on the volumes needed for this module, ask that local team about setting up a suffix with these settings on by default after evaluation.
Best,
Krishan
Hello Krishnan,
I tried the sequence I see from the I2C Script tool the value is being reflected when read back.
Writing to PAGE
Writing to OP_MODE
After this If I close the I2C Script tool window and go back to Device Tab then click on Save to Volatile memory the register map does not reflect the programming ,
I see the mode as 82 I confirm the same from the I2C script again by only reading
