AMIS-30624 Datasheet, PDF (17/56 Pages) AMI SEMICONDUCTOR – I2C Microstepping Motordriver

AMIS-30624 I²C Microstepping Motordriver
Data Sheet
15.0 Functional Description
This chapter describes the following functional blocks in more detail:
• Position controller
• Main control and register, OTP memory + ROM
• Motordriver
The motion detection and I²C control are discussed in separate chapters.
15.1 Position Controller
15.1.1. Positioning and Motion Control
A positioning command will produce a motion as illustrated in Figure 7. 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.
Acceleration
range
Zero speed
Hold current
Pstart
Pmin
Velocity
Vmax
Vmin
P=0
Optional zero
switch
Deceleration
range
Zero speed
Hold current
Pstop
Position
Pmax
Table 13: Position Related Parameters
Parameter
Pmax – Pmin
Zero speed hold current
Maximum current
Acceleration and deceleration
Vmin
Vmax
Figure 7: Positioning and Motion Control
Reference
See Positioning
See Ihold
See Irun
See Acceleration and deceleration
See Minimum velocity
See Maximum velocity
AMI Semiconductor – Apr. 2007, Rev 3.1, M-20664-003
17
www.amis.com