Other Parts Discussed in Thread: MMWAVEICBOOST,
While testing the ISK on our application board we found that none of the components are installed on the ISK that perform a power up reset on the NRST pin of the 6843. We used many of the various options provided on the ISK such as the RC of R95 and C53, the various power good signals from the PMIC (R90, R91, R122, R168 for PG0, PG1 and GPO0) and even the 1v0 PGOOD signal. None properly initialize the 6843.
Only a hard reset to ground (pull up of 10K installed) with a switch contact or pushbutton after power up was successful. Read seconds of time after power up.
How long after the last supply power is good does the NRST line need to be executed for proper device operation?
Is there a slew rate minimum on the NRST line?
Is there any component population on the ISk that permits proper operation without externally controlling the NRST timing and activation?
There seems to be little information on the reset function. Only Figure 5-1 in the data sheet hints at some timing requirement between DC power OK and some period of stable power prior to the release of nRESET.
