BMP180 Bosch Sensortec, BMP180 Datasheet - Page 22

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

5.5 Read A/D conversion result or E
To read out the temperature data word UT (16 bit), the pressure data word UP (16 to 19 bit) and
the E
After the start condition the master sends the module address write command and register address.
The register address selects the read register:
E
Temperature or pressure value UT or UP 0xF6 (MSB), 0xF7 (LSB), optionally 0xF8 (XLSB)
Then the master sends a restart condition followed by the module address read that will be
acknowledged by the BMP180 (ACKS). The BMP180 sends first the 8 MSB, acknowledged by the
master (ACKM), then the 8 LSB. The master sends a "not acknowledge" (NACKM) and finally a stop
condition.
Optionally for ultra high resolution, the XLSB register with address 0xF8 can be read to extend the
16 bit word to up to 19 bits; refer to the application programming interface (API) software rev. 1.1
(“
S CL
S DA
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
2
BMP180_ API”,
parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
PROM data registers
S
2
PROM data proceed as follows:
Module address
write 0xEE
available from Bosch Sensortec).
ACKS
Figure 9: Timing diagram read 16 bit A/D conversion result
Register address
0xAA to 0xBF
e.g. 0xF6
ACKS
2
PROM data
Restart
Data sheet
BMP180
Module address
read 0xEF
ACKS
ADC result 0x5C
MSB e.g.
ACKM
ADC result 0x96
LSB e.g.
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NACKM
Bosch Sensortec
P