AN4506 Просмотр технического описания (PDF) - STMicroelectronics

Номер в каталоге

Компоненты Описание

производитель

AN4506

L3GD20H: 3-axis digital output gyroscope

STMicroelectronics 

Interrupt generation

AN4506

5.3

Threshold

Threshold registers IG_THS_xH and IG_THS_xL (respectively MSB and LSB) define the

reference angular rates used by interrupt generation circuitry.

Table 21. IG_THS_xH register

-

THSx14 THSx13 THSx12 THSx11 THSx10 THSx9 THSx8

THSx7

THSx6

Table 22. IG_THS_xL register

THSx5 THSx4 THSx3 THSx2

THSx1

THSx0

The value of 1 LSB of the threshold depends on the selected full scale (Table 23).

Full scale (dps)

245

500

2000

Table 23. Threshold LSB value

Threshold LSB value (mdps)

~7.5

~15.3

~61

5.4

Duration

The content of the Dx bits in the IG_DURATION register sets the minimum duration of the

interrupt event to be recognized.

Table 24. IG_DURATION register

WAIT

D6

D5

D4

D3

D2

D1

D0

WAIT

D6 - D0

Table 25. IG_DURATION description

WAIT enable. Default value: 0 (0: disable; 1: enable)

Duration value. Default value: 000 0000

Duration steps and maximum values depend on the ODR chosen.

Duration time is measured in N/ODR, where N is the content of the duration register and

ODR is 12.5, 25, 50, 100, 200, 400, and 800.

Table 26. Duration LSB value in Normal mode

ODR (Hz)

Duration LSB value (ms)

12.5

80

25

40

50

20

100

10

24/47

DocID026442 Rev 2

Share Link: