TI中文支持网Part Number:J784S4XEVM
Hi all，
我们现在正在使用J784s4评估板进行前期预研。请问下，J784s4评估板是怎么实现active模式和MCU-only模式的相互切换的，官方SDK有提供相应的接口吗。
感谢！
Taylor：
您好
官方SDK中没有支持MCU Only mode模式的接口。
可以参考手册的6.10.2.6的说明
Entry into MCU Only state is accomplished by executing a power down sequence except for the 4 MCU domains that remain energized. Exit from MCU Only state is accomplished by executing a power up sequence with the 4 MCU domains remaining energized throughout the sequence.
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Junyan Yang：
Thanks for your reply, I got this. And how do we use J784s4 to execute a power down sequence。
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Taylor：
您好
Please refer to "4.21.1.4. Low power Mode Transition"
4.21.1. MCU Only mode — Platform Development Kit (PDK) – JACINTO User Guide (ti.com)
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Junyan Yang：
Thanks for your reply. Referring to the Low power Mode section, I still have the following questions:
1. I found that this document is for J721 series products, May I ask whether this document is also used for J784S4 series products?
2. If so, can I run the demo mentioned in 4.21.10-4.21.1.11?
3. If so, which path should I run the command mentioned in 4.21.1.10. And I didn't find the lpm_boot.c in the J784S4 SDK, which mentioned in 4.21.1.11.4.
Looking forward to your reply, thank you !!!
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Taylor：
Hi Yang,
I saw that you also raised the same question in the link below.
e2e.ti.com/…/j784s4xevm-how-to-implement-active-mode-and-mcu-only-mode-switching
In order to receive better and more professional support, please raise your question in the link above.
