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BMP280 数据表(PDF) 24 Page - Bosch Sensortec GmbH |
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BMP280 数据表(HTML) 24 Page - Bosch Sensortec GmbH |
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24 / 49 page  Bosch Sensortec | BMP280 Data sheet 24 | 49 Modifications reserved | Data subject to change without notice Document number: BST-BMP280-DS001-26 Revision_1.26_102021 4. Global memory map and register description 4.1 General remarks All communication with the device is performed by reading from and writing to registers. Registers have a width of 8 bits. There are several registers which are reserved; they should not be written to and no specific value is guaranteed when they are read. For details on the interface, consult chapter 5. 4.2 Memory map The memory map is given in Table 18 below. Reserved registers are not shown. Table 18: Memory map Register Name Address bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 Reset state temp_xlsb 0xFC 0 0 0 0 0x00 temp_lsb 0xFB 0x00 temp_msb 0xFA 0x80 press_xlsb 0xF9 0 0 0 0 0x00 press_lsb 0xF8 0x00 press_msb 0xF7 0x80 config 0xF5 spi3w_en[0] 0x00 ctrl_meas 0xF4 0x00 status 0xF3 measuring[0] im_update[0] 0x00 reset 0xE0 0x00 id 0xD0 0x58 calib25...calib00 0xA1…0x88 individual Registers: Reserved registers Calibration data Control registers Data registers Status registers Revision Reset Type: do not write read only read / write read only read only read only write only calibration data press_xlsb<7:4> temp_xlsb<7:4> temp_lsb<7:0> temp_msb<7:0> chip_id[7:0] osrs_t[2:0] reset[7:0] press_lsb<7:0> press_msb<7:0> mode[1:0] t_sb[2:0] filter[2:0] osrs_p[2:0] 4.3 Register description 4.3.1 Register 0xD0 “id” The “id” register contains the chip identification number chip_id[7:0], which is 0x58. This number can be read as soon as the device finished the power-on-reset. 4.3.2 Register 0xE0 “reset” The “reset” register contains the soft reset word reset[7:0]. If the value 0xB6 is written to the register, the device is reset using the complete power-on-reset procedure. Writing other values than 0xB6 has no effect. The readout value is always 0x00. |
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