AMIS-30622 Datasheet, PDF (15/42 Pages) AMI SEMICONDUCTOR – I2C Microstepping Motordriver

AMIS-30622
9.2. Functions description
This chapter describes the four most important blocks:
• Position controller
• Main control and register, OTP memory + RAM
• Motordriver
• I²C controller
9.2.1. Position controller
9.2.1.1. Positioning and motion control
A positioning command will produce a motion as illustrated below. 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 to the parameters
programmed by the application during configuration phase. The current in the coils is also programmable (see
§ Error! Reference source not found.).
Acceleration
range
Velocity
Deceleration
range
Zero speed
Hold current
Vmax
Zero speed
Hold current
Vmin
Pstart
P=0
Pmin
Optional zero
switch
Parameter
Pmax - Pmin
Zero speed Hold Current
Maximum current
Acceleration and deceleration
Vmin
Vmax
Pstop
Position
Pmax
Value
See § 8.5
See § 9.2.2.12 (Ihold)
See § 9.2.2.12 (Irun)
See § 8.4
See § 8.3
See § 8.2
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