Data Sheet

Bosch Sensortec | BME280 Data sheet
27 | 55
Modifications reserved | Data subject to change without notice
Document number: BST-BME280-DS002-15
Revision_1.6_092018
Table 18: Memory map
Register Name Address bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
Reset
state
hum_lsb
0xFE 0x00
hum_msb
0xFD 0x80
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
ctrl_hum
0xF2 0x00
calib26..calib41
0xE1…0xF0 individual
reset
0xE0 0x00
id
0xD0 0x60
calib00..calib25
0x88…0xA1 individual
Registers:
Reserved
registers
Calibration
data
Control
registers
Data
registers
Status
registers
Chip ID Reset
Type:
do not
change
read only
read / write read only read only read only write only
hum_lsb<7:0>
press_lsb<7:0>
press_msb<7:0>
mode[1:0]
t_sb[2:0]
press_xlsb<7:4>
temp_xlsb<7:4>
temp_lsb<7:0>
temp_msb<7:0>
calibration data
chip_id[7:0]
osrs_h[2:0]
hum_msb<7:0>
calibration data
reset[7:0]
osrs_p[2:0]
filter[2:0]
osrs_t[2:0]
5.4 Register description
5.4.1 Register 0xD0 “id”
The “id” register contains the chip identification number chip_id[7:0], which is 0x60. This number can
be read as soon as the device finished the power-on-reset.
5.4.2 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.
5.4.3 Register 0xF2 “ctrl_hum”
The “ctrl_hum” register sets the humidity data acquisition options of the device. Changes to this
register only become effective after a write operation to “ctrl_meas”.