Other Parts Discussed in Thread: AWR2944
Dear Experts,
We are using LP877451-Q1 to power AWR2944 and set a pull-down resistor R14 on the CS_SPI/WD_DIS of 877451.
The test results of our two batches of PCBA produced are different, but the designs and components are the same.
The waveforms of CS_SPI/WD_DIS are different, and abnormal PCBA's NRSTOUT will continue to output reset.
We believe that the reason for this issue is that WD has not been disabled on abnormal PCBA.
I have changed R14 to 2.2K/1k/200R/100R/0R, while the WD can't be disabled and the NRSTOUT always reset, the waveform of CS_SPI/WD_DIS has not be changed.
Please help to see what is causing this problem, and how can we set the value of R14.
Thanks.