AMIS30623C623BRG Datasheet, PDF (25/61 Pages) ON Semiconductor – Micro-stepping Motor Driver

AMIS−30623
DelThr[3:0] Relative threshold used for the
motion detection
Index
DelThr
DelThr Level (V) (*)
0
0000
Disable
1
0001
0.25
2
0010
0.50
3
0011
0.75
4
0100
1.00
5
0101
1.25
6
0110
1.50
7
0111
1.75
8
1000
2.00
9
1001
2.25
A
1010
2.50
B
1011
2.75
C
1100
3.00
D
1101
3.25
E
1110
3.50
F
1111
3.75
(*) Not tested in production. Values are approximations.
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
0
Note: When the motor is stopped, the current is reduced
from <IRUN> to <IHOLD>. In the case of 0 mA hold
current (1111 in the hold current table), the following
sequence is applied:
1. The current is first reduced to 59 mA
(corresponding to 0000 value in the table).
2. The PWM regulator is switched off; the bottom
transistors of the bridges are grounded.
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[10:2] Secure Position of the
stepper−motor. This is the position to which the
motor is driven in case of a LIN communication
loss or when the LIN error−counter overflows.
If <SecPos[10:2]> = “100 0000 00xx”,
secure positioning is disabled; the
stepper−motor will be kept in the position
occupied at the moment these events occur.
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