Other Parts Discussed in Thread: USB2ANY
Hi Experts,
Good day. Seeking your advise on this design query with BQ79600EVM and USB2ANY (necessity of SPI_RDY and nFAULT pins):
I am trying to interface my micro to BQ79600 eval board over SPI interface, currently I am evaluating the BQ79600 using USB2ANY device, here I see 2 pins on the USB2ANY are used for the purpose of SPY_RDY(J4-2) and nFAULT(J4-4) functionalities. I am trying to evaluate if I can build a system without the above 2 pins, hence I perform the following :-
1.In the user guide I see, if nFAULT pin is not used then I can simply ground this pin, when I tried to do the same on the eval setup I mentioned before, I am unable to WAKE UP and POWER DOWN the BQ79600 device(using BQAutoEval tool and USB2ANY setup), I have removed the 'J13' jumper on the BQ79600 eval board and grounded the nFAULT pin on the same and as for the USB2ANY, I have tried adding a 10K pullup to VIO or just left it floating both of which I am unable to WAKE UP or POWER DOWN the BQ79600
2. As for the SPI_RDY, my plan is to provide sufficient delays to compensate for the usage of this pin in my actual application but for the time being I tried a similar approach as point 1 in case of SPI_RDY as well, I pulled the J4-2 pin on both BQ79600 and USB2ANY to VIO via a 10K. Even this doesnt seem to work.
Please advice on the above as this is gating HW design and SW development.
Regards,
Archie A.
