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数据搜索系统，热门电子元器件搜索 |
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VD5377 数据表(PDF) 17 Page - STMicroelectronics |
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VD5377 数据表(HTML) 17 Page - STMicroelectronics |
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17 / 88 page  Doc ID 022952 Rev 2 17/88 VD5377 System overview 4 System overview The VD5377 operates in one of two power management modes: MANUAL or AUTOMATIC (see Figure 6). After initial MCU BOOT the device enters the SW STBY state and waits for configuration from the host. When configured, the device enters MANUAL RUN or AUTOMATIC RUN mode. • MANUAL power management mode is the simplest mode where the host initializes the device which then remains in MANUAL RUN mode until it receives a command to change mode (either an I2C command to return to the SW STBY state or a low power state using the POWERDOWN or STANDBY pin). • AUTOMATIC power management mode is an intelligent, power efficient mode where the device automatically switches to low power mode depending on motion activity. When initialized, the device will continue to operate autonomously minimizing power consumption and host CPU overhead. Figure 6. VD5377 power management modes MCU BOOT SW STBY MANUAL host_config_done = 1 automatic = 0 host_config_done = 1 automatic = 1 host_config_done=0 AUTOMATIC POWER UP RUN RUN |
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