AMIS-30622_13 Datasheet, PDF (26/50 Pages) ON Semiconductor – I2C Micro-Stepping Motor Driver

AMIS−30622
Irun[3:0] Current amplitude value to be fed to
each coil of the stepper−motor. The table below
provides the 16 possible values for <IRUN>.
Index
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Irun
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Run Current (mA)
59
71
84
100
119
141
168
200
238
283
336
400
476
566
673
800
Ihold[3:0] Hold current for each coil of the
stepper−motor. The table below provides the 16
possible values for <IHOLD>.
Index
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Ihold
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Hold Current (mA)
59
71
84
100
119
141
168
200
238
283
336
400
476
566
673
800
Note: When the motor is stopped, the current is reduced
from <IRUN> to <IHOLD>.
StepMode Setting of step modes.
StepMode
0
0
0
1
1
0
1
1
Step Mode
1/2 stepping
1/4 stepping
1/8 stepping
1/16 stepping
Shaft This bit distinguishes between a clock−wise
or counter−clock−wise rotation. The shaft bit is
not working in RunVelocity mode.
SecPos[10:0] Secure Position of the
stepper−motor. This is the position to which the
motor is driven in case of a HW pin connection
is lost. If <SecPos[10:0]> = “100 000000
00”, secure positioning is disabled; the
stepper−motor will be kept in the position
occupied at the moment these events occur.
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