AN4506 Просмотр технического описания (PDF) - STMicroelectronics

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AN4506

L3GD20H: 3-axis digital output gyroscope

STMicroelectronics 

AN4506

Digital filters

Figure 7. Low-pass/high-pass filter connections block diagram

4.1

Filter configuration

Referring to Table 9, the HPen and Out_sel bits are used to drive unfiltered or filtered data to

the output registers and to the FIFO:

HPen

x

x

0

1

Table 9. Out_Sel configuration setting

Out_Sel1

Out_Sel0

Description

0

0

Data in DataReg and FIFO are non high-pass

filtered

0

1

Data in DataReg and FIFO are high-pass

filtered

1

x

Data in DataReg and FIFO are low-pass

filtered by LPF2

1

x

Data in DataReg and FIFO are high-pass and

low-pass filtered by LPF2

Referring to Table 10, the HPen and IG_Sel bits are used to drive unfiltered or filtered data

to the interrupt generator circuitry:

HPen

x

x

Table 10. IG_SEL configuration settings

IG_Sel1

IG_Sel2

Description

0

0

Non-high-pass-filtered data are used for

interrupt generation

0

1

High-pass-filtered data are used for interrupt

generation

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