BMP180 Bosch Sensortec, BMP180 Datasheet - Page 21

• Manufacturer Part Number: BMP180
• Description: Specifications: Lead Free Status: Lead Free ; RoHS Status: RoHS Compliant
• Manufacturer: Bosch Sensortec

5.4 Start temperature and pressure measurement
The timing diagrams to start the measurement of the temperature value UT and pressure value UP
are shown below. After start condition the master sends the device address write, the register
address and the control register data. The BMP180 sends an acknowledgement (ACKS) every 8
data bits when data is received. The master sends a stop condition after the last ACKS.
Abbreviations:
S
P
ACKS
ACKM
NACKM
BST-BMP180-DS000-07 | Revision 2.3 | May 2011
© 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.
Table 8: Control registers values for different internal oversampling_setting (oss)
Start
Stop
Acknowledge by Slave
Acknowledge by Master
Not Acknowledge by Master
Measurement
Temperature
Pressure
Pressure
Pressure
Pressure
(oss = 0)
(oss = 1)
(oss = 2)
(oss = 3)
Figure 8: Timing diagram for starting pressure measurement
(register address 0xF4)
Control register value
Data sheet
BMP180
0x2E
0xB4
0xF4
0x34
0x74
Max. conversion time
[ms]
13.5
25.5
4.5
4.5
7.5
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