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AN4504 Datasheet(PDF) 8 Page - STMicroelectronics

Part # AN4504
Description  This document is intended to provide usage information
PDF  41 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4504 Datasheet(HTML) 8 Page - STMicroelectronics

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Operating modes
AN4504
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DocID026419 Rev 1
2
Operating modes
The L3G4200D provides three different operating modes, respectively cited as power-down
mode, sleep mode and normal mode.
After the power supply is applied, the L3G4200D performs a 10 ms boot procedure to load
the trimming parameter. After the boot is completed, the device is automatically configured
in power-down mode.
Referring to the L3G4200D datasheet, output data rate (ODR), power down (PD) and the
Zen, Yen, Xen bits of CTRL_REG1 are used to select the operating modes (power-down
mode, sleep mode and normal mode) and output data rate (Table 2 and Table 3).
Table 2. Operating mode selection
Operating mode
PD
Zen
Yen
Xen
Power-down
0
-
-
-
Sleep
1
0
0
0
Normal mode
1
-
-
-
Table 3. Data rate configuration
DR [1:0]
BW [1:0]
ODR [Hz]
Cutoff LPF1 [Hz]
Cutoff LPF2 [Hz]
00
00
100
32
12.5
00
01
100
25
00
10
100
25
00
11
100
25
01
00
200
54
12.5
01
01
200
25
01
10
200
50
01
11
200
70
10
00
400
78
20
10
01
400
25
10
10
400
50
10
11
400
110
11
00
800
93
30
11
01
800
35
11
10
800
50
1
11
800
110



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