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AN3393 データシート(PDF) 11 Page - STMicroelectronics |
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AN3393 データシート(HTML) 11 Page - STMicroelectronics |
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11 / 103 page  DocID018750 Rev 4 11/103 AN3393 Operating modes 103 1 Operating modes The LIS3DSH provides two different operating modes: power-down mode and normal mode. After the power supply is applied, the LIS3DSH performs a 10 ms boot procedure to load trimming parameters from internal Flash memory. After the boot is completed, the device is automatically configured in power-down mode. Referring to the LIS3DSH datasheet, the output data rate (ODR) and Zen, Yen, Xen bits of the CTRL_REG4 register are used to select the operating modes (power-down and Normal mode) and the output data rate (see Table 1). Table 2 shows typical values of power consumption for the different operating modes. Table 1. Data rate configuration ODR3 ODR2 ODR1 ODR0 ODR selection 0000 Power-down 0001 3.125 Hz 0010 6.25 Hz 0011 12.5 Hz 0100 25 Hz 0101 50 Hz 0110 100 Hz 0111 400 Hz 1000 800 Hz 0001 1600 Hz Table 2. Power consumption ODR (Hz) Current consumption (μA) @ Vdd = 2.5 V [typ.] Power-down 2 3.125 11 6.25 19 12.5 35 25 67 50 119 100 225 400 225 800 225 1600 225 |
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