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参数资料
| 型号： | MPL115A2T2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 8/16页 |
| 文件大小： | 0K |
| 描述： | IC BAROMETER I2C DGTL MINI 8LGA |
| 标准包装： | 5,000 |
| 压力类型： | 绝对 |
| 工作压力： | 7.2 PSI ~ 16.6 PSI，50 ~ 115 kPa |
| 输出： | 数字 |
| 精确度： | ±1% |
| 电源电压： | 2.375 V ~ 5.5 V |
| 端接类型： | PCB |
| 工作温度： | -40°C ~ 105°C |
| 封装/外壳： | 8-TLGA |
| 出厂设置： | * |
The actions taken by the part in response to each command are as follows:
Table 4. I 2 C Write Command Description
Command
Start Conversions
Action Taken
Wake main circuits. Start clock. Allow supply stabilization time. Select pressure sensor input. Apply positive sensor
excitation and perform A to D conversion. Select temperature input. Perform A to D conversion. Load the Pressure and
Temperature registers with the result. Shut down main circuits and clock.
Table 5. I 2 C Read Command Description
Device Address + Read bit
Read Pressure MSB
Read Pressure LSB
Read Temperature MSB
Read Temperature LSB
Read Coefficient data byte 1
Command
Binary
1100 0001
X000 0000
X000 0001
X000 0010
X000 0011
X000 0100
HEX (1)
0xC1
0x00
0x01
0x02
0x03
0x04
X = don’t care
These are MPL115A2 I 2 C commands to read coefficients, execute Pressure and Temperature conversions, and to read Pressure
and Temperature data. The sequence of the commands for the interaction is given as an example to operate the MPL115A2.
Utilizing this gathered data, an example of the calculating the Compensated Pressure reading is given in floating point notation.
I 2 C Commands (simplified for communication)
Device Address + write bit “To Write” = 0xC0
Device Address + read bit “To Read” = 0xC1
Command to Write “Convert Pressure and Temperature” = 0x12
Command to Read “Pressure ADC High byte” = 0x00
Command to Read “Pressure ADC Low byte” = 0x01
Command to Read “Temperature ADC High byte” = 0x02
Command to Read “Temperature ADC Low byte” = 0x03
Command to Read “Coefficient data byte 1 High byte” = 0x04
Read Coefficients:
[0xC0], [0x04], [0xC1], [0x3E], [0xCE], [0xB3], [0xF9], [0xC5], [0x17], [0x33], [0xC8]
Figure 3. I 2 C Read Coefficient Datagram
MPL115A2
Sensors
8
Freescale Semiconductor, Inc.
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