Bosch Sensortec"| BST-BMP581-DS004-02 21 | 74
Modifications reserved | Data subject to change
without notice Document number: BST-BMP581-DS004-02
Figure 3: Step response at different IIR filter settings
Figure 4: Step response at different IIR filter settings on log scale and different threshold limits in dashed lines (3dB, 90%, 95%,
99.5%, 100%)
Table 10: IIR filter settings and bandwidth
Register value
coefficient
-3db cutoff frequency)
The IIR filter can be independently programmed for temperature and pressure with the fields DSP_IIR.set_iir_t and
DSP_IIR.set_iir_p. The value “0x0” is used to bypass the filter. The IIR filter is reset when a transition from sleep mode
to NORMAL or CONTINUOUS mode occurs. That means that the first measurment value will be the initial content of
the filter. A manual reset of the filter, e.g. when using forced mode, can be triggered by asserting the register field
DSP_- CONFIG.iir_flush_forced_en.
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