Other Parts Discussed in Thread: AM3874
Hi,
Our customer is trying to boot AM3874 from external asic. Customer uses BTMODE[10]=0(XIP(NOR) boot mode).
At the above condition, I have some questions. Please see the following.
1.Is CLKOUT1(AG17) output before POR is deasserted when POR?
2.According to TRM(3.7.2 XIP Memory, Page455), GPMC_CLK(R26) is 55MHz when boot from XIP devices. How is frequency of CLKOUT1(AG17)? Is it same as GPMC_CLK?
3. How long is the lock time of PLL when PLL frequecny is changed?
4. Please let me know how to way confirming PLL is Locked.
Please adivse me the above.
Best regards,
Michi