有哪位兄弟用过IMX357没？我看厂家开发板上电时序和C手册上要求的有点不一样，不知道这样会不会有什么隐患，现在开板有点犹豫了，不知道按照开发板的做好，还是按照IC手册做好。
手册上要求：
The power-up sequence should be completed as follows:
1. Assert Power on Reset (POR).
2. Turn on digital logic domain and IO power supply: VDDn, NVCCx
3. Wait until VDDn and NVCCx power supplies are stable + 32 μs.
4. Turn on all other power supplies: PHY1_VDDA, USBPHY1_VDDA_BIAS, USBPHY1_UPLLVDD, OSC24M_VDD, OSC_AUDIO_VDD, MVDD, PVDD, FUSEVDD. (Always FUSE_VDD should be connected to ground, except when eFuses are to be programmed.)
5. Wait until PHY1_VDDA, USBPHY1_VDDA_BIAS, PHY2_VDD, USBPHY1_UPLLVDD, OSC24M_VDD, OSC_AUDIO_VDD, MVDD, PVDD, (FUSEVDD, optional). Power supplies are stable + 100 μs.
6. Deassert the POR signal.
也就是说，VDDn和NVCCx要先起来，OSC24M_VDD要后起来,但是我发现厂家提供的评估板OSC24M_VDD与NVCCx是接的同一个电源3.3V,并没有按照上面要求的时序连接。 |
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