Other Parts Discussed in Thread: TIDC-01005
Hello,
I have been working on CC3220SF micro controller and have developed my application on WIFI door lock reference design TIDC-01005 with changes mainly focusing on MQTT
and everything is working fine .
We have designed our own custom board of CC3220SF for our application and i have been testing my application on it.
Below i will explain briefly the work i have done.
Earlier i had issue with my application entering LPDS mode as i was using UART interrupt mode which didn't allow me to enable the power policy,but i made certain changes to my application and succeeded in making my application to enter the LPDS mode. To confirm that its entering the LPDS mode in my application ,In LPDS only selected GPIO works and in my application GPIO13 works in LPDS which i have used as switch,when i press the switch it comes out of LPDS and using other part of my application i am making it to go LPDS again.so it confirms that its entering the LPDS mode.
below is the ISSUE which is tested in our custom board
In LPDS the expected current consumption according to the wifi door lock reference design document is 377uA on average in the idle connected state to the AP,but for me its taking around 5-6mA in LPDS mode which is pretty much higher than expected.when it comes out of the LPDS it take around 20mA in active mode which is fine for us as our focus is on LPDS mode. there are no changes with respect to some data like LSI which is 400mA and other things which is same as in wifi door lock reference design.
But when i test in cc3220sf launchpad powering only cc3220sf and the on board serial flash its showing the current consumption lesser and around 1mA.
Our testing procedure is exactly same as cc3220sf launchpad in our custom board but her we are getting that extra 4-5mA current consumption which we are puzzled.
Any particular reason it might be taking more current even after going to the LPDS mode?
note: But as per datasheet the cc3220sf takes 710 uA in idle connected state.
Regards
Sanath Rai