Other Parts Discussed in Thread: SN74AUP2G08, TPS65217
Hi,
I have questions about AM335x.
Q1.
From schematic of AM335x StarterKit Board, AND logic(SN74AUP2G08) are used for RTC Reset CKT.
Are these AND logic used for making delay of RTC_PORZ deassertion?
And is it because RTC_PORZ need to be asserted for at least 1 ms to provide enough time for
the internal RTC LDO output to reach a valid level before RTC reset is released?
If AND Logic are only for the delay, can I use CR circuit instead of AND Logic?
Q2.
In AM335x datasheet(SPRS717J)page.171 Figure 7-47, "49.9ohm(+/- 1%)" is connected to DDR_VTP.
Do I must to use 49.9ohm(+/- 1%) or can I use 50ohm(+/- 1%)?
best regards,
g.f.