TPS25751: TPS25751. Device accepted the patch bundle and not switching from PTCH to APP mode.

Hello,

If the address 0x30 is being NACK'd it is because the PMBs message was not received and/or processed. 

(1) What is the PBMs data being sent? (step 4)

(2) Do you confirm that the PBMs data is good before sending the PBMs command? (step 5)

Regards,
Chris

Dear Chris,

I think I send is right.

First ,I send 0x20\09\x06\x00\x2F\x00\x00\x30\x32

second,I sen 0x20\0x08\0x04\0x50\0x42\0x4D\0x73

I used a logic analyzer to check and found ack, and in my code have check, like the demo in my link. all check is pass.

do you have other idea.

tks

Hello,

jiayue hu said:

First ,I send 0x20\09\x06\x00\x2F\x00\x00\x30\x32

After this, do you mean you use a logic analyzer to read the register 0x09?  How do you confirm the write?

https://www.ti.com/lit/an/slvafv8a/slvafv8a.pdf#page=8

This is bad:

This is good:

In my example i have to write and then read from 0x09 twice with a 500us delay between each before it is good.