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AN3393 データシート(PDF) 12 Page - STMicroelectronics |
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AN3393 データシート(HTML) 12 Page - STMicroelectronics |
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12 / 103 page  Operating modes AN3393 12/103 DocID018750 Rev 4 1.1 Power-down mode When the device is in power-down mode, almost all internal blocks are switched off to minimize power consumption. Digital interfaces (I2C and SPI) are still active to allow communication with the device. The content of the configuration registers is preserved and output data registers are not updated, therefore keeping the last data sampled in the memory before switching to power-down mode. 1.2 Normal mode In normal mode, data are generated at the selected output data rate (ODR) through the ODR bits. Nine different ODR configurations are available in normal mode, from 3.125 Hz to 1600 Hz. 1.3 Switch mode timing Turn-on times of the LIS3DSH accelerometer are shown in Table 3. Their values depend on the ODR and bandwidth selected. Table 3. Turn-on times ODR [Hz] Analog filter BW = 800 Hz Analog filter BW = 400 Hz Analog filter BW = 200 Hz Analog filter BW = 50 Hz 1600 3/ODR 4/ODR 8/ODR 26/ODR 800 2/ODR 3/ODR 5/ODR 14/ODR 400 2/ODR 2/ODR 3/ODR 8/ODR 100 2/ODR 2/ODR 2/ODR 3/ODR [50 ... 3.125] 1/ODR 1/ODR 1/ODR 1/ODR |
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