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BMP280 Datasheet(PDF) 24 Page - Bosch Sensortec GmbH

Part # BMP280
Description  Digital Pressure Sensor
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Manufacturer  BOSCH [Bosch Sensortec GmbH]
Direct Link  https://www.bosch-sensortec.com
Logo BOSCH - Bosch Sensortec GmbH

BMP280 Datasheet(HTML) 24 Page - Bosch Sensortec GmbH

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Datasheet
BMP280 Digital Pressure Sensor
Page 24
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.
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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