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I am working with standby mode on the STM32F7508-DK board and measuring the standby current as 900mA. The tools I use in the program consist of LED and RTC for wake-up. What should I do to reduce this current? 
What is the camera protocol used by STM32F7508-DK?MIPI or DVPWhich cameras does STM32F7508-DK module support?
How can I measure the sleep current of the chip on the STM32F7508-DK board?