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L9779WD Datasheet(PDF) 105 Page - STMicroelectronics

Part # L9779WD
Description  Multifunction IC for engine management system
PDF  170 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9779WD Datasheet(HTML) 105 Page - STMicroelectronics

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DocID027452 Rev 5
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L9779WD
Functional description
169
Figure 67. Adaptive Filter Function when the MSC bit is 10 or 11
Limited adaptive mode
Auto time adaptive filter is fixed to 4 µs (typical).
Auto amplitude adaptive filter is limited to a minimum hysteresis as set by related VRS
register. Note that in case the VRS input amplitude is persistently lower than the minimum
hysteresis setting, VRS output deadlock can be removed by setting CONFIG_REG5 bit5 to
1, which forces the hysteresis to 5 µA. This procedure is not glitch free. Once a new
minimum hysteresis value has been set, CONFIG_REG5 bit5 must return to 0
VRS diagnostic is not available when limited adaptive mode is selected.



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