ARM IM-AD1 - Manual (Page 66)

Reference Design Example
4-20 Copyright © 2001-2003. All rights reserved. ARM DUI 0163B
Figure 4-5 Half-step output waveforms
4.7.2 Stepx count register
This is a 9-bit register that is used to specify the number of steps to advance. When the
required number of steps are complete, the count stops and the register is loaded with
the next value.
4.7.3 Stepx speed register
This register contains a 14-bit value that is used to divide a 10kHz clock signal to
regulate the speed of the stepper motor. That is, the step speed register defines the
number of 0.1ms periods between steps.
Stepx_PH3
Stepx_PH2
Stepx_PH1
Stepx_PH4