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L99SM81V Datasheet(PDF) 21 Page - STMicroelectronics

Part # L99SM81V
Description  Programmable stepper motor driver for automotive applications with micro-stepping and stall detection
PDF  85 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L99SM81V Datasheet(HTML) 21 Page - STMicroelectronics

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L99SM81V
Device description
DocID027599 Rev 4
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2.9.3
DMR[1:0] bits = 00b - Auto decay mode 1
In Auto Decay Mode1 the phase counter value and the motor spinning direction (DIR bit)
are taken into account to select the appropriate switching state specifically, either a slow
decay or a mixed decay are applied.
The next two figures show the dependency of the applied decay mode from the phase
counter and the direction bit. See also paragraph Section 2.9.2: "DMR[1:0] bits = 10b, DMH
= 1 - Mixed decay mode always applied" for mixed decay mode description.
Figure 16: Electrical revolution in auto decay mode 1 (DIR = 1)



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