AMIS-30621 LIN Micro-stepping Motor Driver
Data Sheet
14.0 Functions Description
This section describes the following functional blocks in more detail:
• Position controller
• Main control and register, OTP memory + ROM
• Motor driver
The motion detection and LIN controller are discussed in separate sections.
14.1 Position Controller
14.1.1. Positioning and Motion Control
A positioning command will produce a motion as illustrated in Figure 8. A motion starts with an acceleration phase from minimum
velocity (Vmin) to maximum velocity (Vmax) and ends with a symmetrical deceleration. This is defined by the control logic according to
the position required by the application and the parameters programmed by the application during configuration phase. The current in
the coils is also programmable.
Velocity
Acceleration
range
Deceleration
range
Zero speed
Hold current
Zero speed
Hold current
Vmax
Vmin
P=0
Position
Pstart
Pstop
Pmax
Optional zero
switch
Pmin
Figure 8: Positioning and Motion Control
Table 13: Position Related Parameters
Parameter
Reference
Pmax – Pmin
See Positioning
Zero speed hold current
Maximum current
Acceleration and deceleration
Vmin
See Ihold
See Irun
See Acceleration and Deceleration
See Minimum Velocity
See Maximum Velocity
Vmax
AMI Semiconductor – Sept. 2007, Rev 1.5
15
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