AMIS-30624 Datasheet, PDF (26/56 Pages) AMI SEMICONDUCTOR – I2C Microstepping Motordriver

AMIS-30624 I²C Microstepping Motordriver
Data Sheet
The command used to load the application parameters via the I²C bus in the RAM prior to an OTP memory programming is
SetMotorParam. This allows for a functional verification before using a SetOTPparam command to program and zap separately one
OTP memory byte. A GetOTPparam command issued after each SetOTPparam command allows verification of the correct byte
zapping.
15.2.7.2. Application Parameters Stored in OTP Memory
Except for the physical address PA[3:0], these parameters, although programmed in a non-volatile memory, can still be overridden in
RAM by an I²C writing operation.
PA[3:0]
In combination with hired wired (HW) address, it forms the physical address AD[6:0] of the stepper-motor. Up to
32 steppermotors can theoretically be connected to the same I²C bus.
AbsThr[3:0]
Absolute threshold used for the motion detection
Index
AbsThr
AbsThr level (V)
0
0000
Disable
1
0001
0.5
2
0010
1.0
3
0011
1.5
4
0100
2.0
5
0101
2.5
6
0110
3.0
7
0111
3.5
8
1000
4.0
9
1001
4.5
A
1010
5.0
B
1011
5.5
C
1100
6.0
D
1101
6.5
E
1110
7.0
F
1111
7.5
DelThr[3:0]
Delta 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
AMI Semiconductor – Apr. 2007, Rev 3.1, M-20664-003
26
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