AN4506 Просмотр технического описания (PDF) - STMicroelectronics
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AN4506 Datasheet PDF : 47 Pages
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Operating modes
2
Operating modes
AN4506
The L3GD20H provides four different operating modes, respectively given as Power-down
mode, Sleep mode, Low ODR mode and Normal mode.
After the power supply is applied, the L3GD20H 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 L3GD20H datasheet, output data rate (ODR), power-down (PD) and the
Zen, Yen, and Xen bits of the CTRL1 register and the Low_ODR bit of the LOW_ODR
register are used to select the operating modes (Power-down mode, Sleep mode,
Low_ODR and Normal mode) and output data rate (Table 2 and Table 3).
Table 2. Operating mode selection
Operating
mode
PD
Low_ODR
Zen
Yen
Xen
Power down
0
x
-
-
-
Sleep
1
x
0
0
0
Low_ODR
1
1
-
-
-
Normal mode
1
0
-
-
-
Low_ODR
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
Table 3. Data rate configuration
DR [1:0]
BW [1:0]
ODR [Hz]
00
00
12.5
00
01
12.5
00
10
12.5
00
11
12.5
01
00
25
01
01
25
01
10
25
01
11
25
1X
00
50
1X
01
50
1X
10
50
1X
11
50
00
00
100
00
01
100
00
10
100
00
11
100
Cutoff [Hz]
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
16.6
16.6
16.6
16.6
12.5
25
25
25
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DocID026442 Rev 2
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