AMIS30623C623BRG Datasheet, PDF (35/61 Pages) ON Semiconductor – Micro-stepping Motor Driver

AMIS−30623
FS2StallEn
If <AbsThr> or <DelThr> <> 0 (i.e. motion detection
is enabled), then stall detection will be activated AFTER the
acceleration ramp + an additional number of full−steps,
according to the following table:
Table 29.
ACTIVATION DELAY OF MOTION DETECTION
Index
FS2StallEn[2:0]
Delay (Full Steps)
0
000
0
1
001
1
2
010
2
3
011
3
4
100
4
5
101
5
6
110
6
7
111
7
DC100StEn
When a motor with large bemf is operated at high speed
and low supply voltage, then the PWM duty cycle can be as
high as 100%. This indicates that the supply is too low to
generate the required torque and might also result in
erroneously triggering the stall detection. The bit
<DC100StEn> enables stall detection when duty cycle is
100%. For more information please refer to the Application
Note “Robust Motion Control with AMIS−3062x Stepper
Motor Drivers”.
Motion Qualification Mode (*)
This mode is useful to debug motion parameters and to
verify the stability of stepper motor systems. The motion
qualification mode is entered by means of the LIN command
TestBemf. The SWI pin will be converted into an
analogue output on which the Back EMF integrator output
can be measured. Once activated, it can only be stopped after
a POR. During the Back emf observation, reading of the
SWI state is internally forbidden.
(*) Note: Not applicable for product versions
AMIS30623C6238(R)G and AMIS30623C623B(R)G.
More information is available in the Application Note
“Robust Motion Control with AMIS−3062x Stepper Motor
Drivers”.
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