Hello,
I have a board and I am checking the power sequence requirements against figure 4.1, page 96 of the AM3358 datasheet. I cannot boot the processor and I have seen 2 issues in the power sequence of my design:
1) The "RTC_PWRONRSTn" becomes correctly high after the "VDDS_RTC" supply but before the "All 1.8-V supplies" become stable. Will this cause an issue with booting and if yes, on which supplies? I am not using the "PMIC_POWER_EN" signal.
2) The "PWRONRSTn"(pin B15, same a PORZ) remains low throughout the power sequencing and goes high when all the power supplies are stable as it is required. However, incorrectly the "PWRONRSTn" becoms high before the high frequency clock (OSC0, 24MHz) becomes stable. The clock starts after 1.4ms after the high state of the "PWRONRSTn". Could issue 1 causes this clock behavour?
All the other supplies look correct and he voltage levels too.
Thanks.