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BMP280 Datasheet(PDF) 32 Page - Bosch Sensortec GmbH |
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BMP280 Datasheet(HTML) 32 Page - Bosch Sensortec GmbH |
32 / 49 page Datasheet BMP280 Digital Pressure Sensor Page 32 BST-BMP280-DS001-19 | Revision 1.19 | January 2018 Bosch Sensortec © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Note: Specifications within this document are subject to change without notice. Not intended for publication. Start RW Stop 1 1 1 1 0 1 1 0 bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 CSB = 1 Data byte Data register - address F7h Register address (F6h) CSB = 0 Control byte Data byte Data register - address F6h Figure 11: SPI multiple byte read 5.4 Interface parameter specification 5.4.1 General interface parameters The general interface parameters are given in Table 26 below. Table 26: interface parameters Parameter Symbol Condition Min Typ Max Units Input – low level Vil_si VDDIO=1.2V to 3.6V 0.2 * VDDIO V Input – high level Vih_si VDDIO=1.2V to 3.6V 0.8 * VDDIO V Output – low level for I2C Vol_SDI VDDIO=1.62V, iol=3 mA 0.2 * VDDIO V Output – low level for I2C Vol_SDI _1.2 VDDIO=1.20V, iol=3 mA 0.23 * VDDIO V Output – low level Vol_SD O VDDIO=1.62V, iol=1 mA 0.2 * VDDIO V Output – low level Vol_SD O_1.2 VDDIO=1.20V, iol=1 mA 0.23 * VDDIO V Output – high level Voh VDDIO=1.62V, ioh=1 mA (SDO, SDI) 0.8 * VDDIO V Output – high level Voh_1.2 VDDIO=1.2V, ioh=1 mA (SDO, SDI) 0.6 * VDDIO V Pull-up resistor Rpull Internal pull-up resistance to VDDIO 70 120 190 kΩ I2C bus load capacitor Cb On SDI and SCK 400 pF 5.4.2 I²C timings For I²C timings, the following abbreviations are used: “S&F mode” = standard and fast mode “HS mode” = high speed mode Cb = bus capacitance on SDA line All other naming refers to I²C specification 2.1 (January 2000). The I²C timing diagram is shown in Figure 12. The corresponding values are given in Table 27. |
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