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MS5803-02BA Datasheet(PDF) 8 Page - TE Connectivity Ltd

Part No. MS5803-02BA
Description  High resolution module, 20cm
Download  19 Pages
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Maker  TEC [TE Connectivity Ltd]
Homepage  http://www.te.com/usa-en/home.html
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MS5803-02BA Datasheet(HTML) 8 Page - TE Connectivity Ltd

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MS5803-02BA
Miniature Altimeter Module
SENSOR SOLUTIONS ///MS5803-02BA
09/2015
Page 8
I2C MODE
The external microcontroller clocks in the data through the input SCLK (Serial CLocK) and SDA (Serial DAta). The
sensor responds on the same pin SDA which is bidirectional for the I2C bus interface. So this interface type uses
only 2 signal lines and does not require a chip select, which can be favorable to reduce board space. In I2C-Mode
the complement of the pin CSB (Chip Select) represents the LSB of the I2C address. It is possible to use two sensors
with two different addresses on the I2C bus. The pin CSB shall be connected to VDD or GND (do not leave
unconnected!).
Pin CSB
Address (7 bits)
High
0x76 (1110110 b)
Low
0x77 (1110111 b)
COMMANDS
The MS5803-02BA has only five basic commands:
1. Reset
2. Read PROM (128 bit of calibration words)
3. D1 conversion
4. D2 conversion
5. Read ADC result (24 bit pressure / temperature)
Size of each command is 1 byte (8 bits) as described in the table below. After ADC read commands the device will
return 24 bit result and after the PROM read 16bit result. The address of the PROM is embedded inside of the
PROM read command using the a2, a1 and a0 bits.
Command byte
hex value
Bit number
0
1
2
3
4
5
6
7
Bit name
PR
M
COV -
Typ
Ad2/
Os2
Ad1/
Os1
Ad0/
Os0
Stop
Command
Reset
0
0
0
1
1
1
1
0
0x1E
Convert D1 (OSR=256)
0
1
0
0
0
0
0
0
0x40
Convert D1 (OSR=512)
0
1
0
0
0
0
1
0
0x42
Convert D1 (OSR=1024)
0
1
0
0
0
1
0
0
0x44
Convert D1 (OSR=2048)
0
1
0
0
0
1
1
0
0x46
Convert D1 (OSR=4096)
0
1
0
0
1
0
0
0
0x48
Convert D2 (OSR=256)
0
1
0
1
0
0
0
0
0x50
Convert D2 (OSR=512)
0
1
0
1
0
0
1
0
0x52
Convert D2 (OSR=1024)
0
1
0
1
0
1
0
0
0x54
Convert D2 (OSR=2048)
0
1
0
1
0
1
1
0
0x56
Convert D2 (OSR=4096)
0
1
0
1
1
0
0
0
0x58
ADC Read
0
0
0
0
0
0
0
0
0x00
PROM Read
1
0
1
0
Ad2
Ad1
Ad0
0
0xA0 to
0xAE
Figure 4: Command structure


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