AN4506 Просмотр технического описания (PDF) - STMicroelectronics

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AN4506

L3GD20H: 3-axis digital output gyroscope

STMicroelectronics 

Reading angular rate data

Figure 3. Data synchronization: level sensitive

AN4506

Figure 4. Level-sensitive trigger stamping

3.5.2

Pulse sensitive trigger (LVLen = 1; EXTRen = 0; IMPen = 1)

The pulse-sensitive trigger is similar to the level-sensitive trigger, and has to be used if the

duration of the DEN pulse is shorter than the selected gyroscope ODR. Once enabled, the

LSB bit of the gyroscope X, Y, Z output data generated after the pulse is set to 1; if no pulse

occurs, the LSB bit of the next generated gyroscope X, Y, Z output data is set to 0.

When ODR selected is 800 Hz, the maximum DEN sample frequency is fDEN = 1/TDEN =

400 Hz.

Figure 5. Data synchronization: pulse sensitive

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