Hi,
We are moving from revision C to revision E silicoin on CC1312. We are experiencing problems with a brown out detection on VDDR with revision E, havent had this problem with revision C. I estimate that maybe 7 out of 10 show this problem. When i measure VDDR I can't see any problems with the voltage.
I have reproduced the problem with a slightly modified version of the uartecho example application from SDK 3.10.0.53. I needed to add a sleep in the main while loop and removed the rx part.
while (1) {
//UART_read(uart, &input, 1);
UART_write(uart, &input, 1);
sleep(1);
}
Not totally sure why the sleep is needed, maybe its related to power modes of the MCU? The MCU reports a brown out approximately after 2 seconds of running.
I believe that the problem lies in our design. Because when I compare our design to the reverence design of the Launchpad, they differ. This is how our design of the power supply for the CC1312 looks like
I believe that L5 is misplaced as one problem. Because to my understanding DCDC_SW is an output(?). And the hardware designer agreed so we tried to remove L5 but then the design didn't work at all.
Maybe someone can help us with this while we continue to look for the problem?
/Henrik
