AMIS-30622 Datasheet, PDF (28/42 Pages) AMI SEMICONDUCTOR – I2C Microstepping Motordriver

AMIS-30622
9.2.2.12. Application parameters stored in OTP Memory
Except for the physical address AD[3:0] these parameters, although programmed in a non-volatile memory can
still be overridden in RAM by a I²C writing operation.
AD[4:0]
Physical address of the stepper-motor. Up to 32 Stepper-motors can theoretically be
connected to the same I²C bus.
Irun[3:0]
Peak current value to be fed to each coil of the stepper-motor. The table below
provides the 16 possible values for IRUN.
Irun
Peak current (mA)
0
0
0
0
59
0
0
0
1
71
0
0
1
0
84
0
0
1
1
100
0
1
0
0
119
0
1
0
1
141
0
1
1
0
168
0
1
1
1
200
1
0
0
0
238
1
0
0
1
283
1
0
1
0
336
1
0
1
1
400
1
1
0
0
476
1
1
0
1
566
1
1
1
0
673
1
1
1
1
800
Ihold[3:0]
Hold current for each coil of the stepper-motor. The table below provides the 16
possible values for IHOLD.
Ihold
Hold current (mA)
0
0
0
0
59
0
0
0
1
71
0
0
1
0
84
0
0
1
1
100
0
1
0
0
119
0
1
0
1
141
0
1
1
0
168
0
1
1
1
200
1
0
0
0
238
1
0
0
1
283
1
0
1
0
336
1
0
1
1
400
1
1
0
0
476
1
1
0
1
566
1
1
1
0
673
1
1
1
1
800
StepMode
Indicator of stepping mode to be used.
StepMode
0
0
0
1
1
0
1
1
Step mode
Half stepping
1/4 micro step
1/8 micro step
1/16 micro step
Shaft
Indicator of Reference Position. If Shaft = ‘0’, the reference position is the maximum
inner position, whereas if Shaft = ‘1’, the reference position is the maximum outer
position
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