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AN3308 датащи(PDF) 12 Page - STMicroelectronics

номер детали AN3308
подробное описание детали  This document describes the low-voltage 3-axis digital output linear MEMS accelerometer provided in an LGA package
PDF  52 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3308 датащи(HTML) 12 Page - STMicroelectronics

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Startup sequence
AN3308
12/52
Doc ID 18198 Rev 1
3
Startup sequence
Once the device is powered-up, it automatically downloads the calibration coefficients from
the embedded flash to the internal registers. When the boot procedure is completed, i.e.
after approximately 5 milliseconds, the device automatically enters power-down mode. To
turn on the device and gather acceleration data, it is necessary to select one of the
operating modes through CTRL_REG1 and to enable at least one of the axes.
The following general purpose sequence can be used to configure the device:
3.1
Reading acceleration data
3.1.1
Using the status register
The device is provided with a STATUS_REG which should be polled to check when a new
set of data is available. The reading procedure should be the following:
1.
Write CTRL_REG1
2.
Write CTRL_REG2
3.
Write CTRL_REG3
4.
Write CTRL_REG4
5.
Write CTRL_REG5
6.
Write CTRL_REG6
7.
Write Reference
8.
Write INT1_THS
9.
Write INT1_DUR
10. Write INT1_CFG
11. Write CTRL_REG5
1.
Read STATUS_REG
2.
If STATUS_REG(3) = 0 then go to 1
3.
If STATUS_REG(7) = 1 then some data have been overwritten
4.
Read OUTX_L
5.
Read OUTX_H
6.
Read OUTY_L
7.
Read OUTY_H
8.
Read OUTZ_L
9.
Read OUTZ_H
10. Data processing
11. Go to 1



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