AMIS-30624 Datasheet, PDF (50/56 Pages) AMI SEMICONDUCTOR – I2C Microstepping Motordriver

AMIS-30624 I²C Microstepping Motordriver
Data Sheet
SetStallParam
This command sets the motion detection parameters and the related steppermotor parameters, such as the minimum and maximum
velocity, the run- and hold current, acceleration and step-mode. See Motion Detection for the meaning of these parameters.
SetStallParam corresponds to the following I²C command frame:
Byte Content
0
Address
1 Command
2
Data 1
3
Data 2
4
Data 3
5
Data 4
6
Data 5
7
Data 6
8
Data 7
SetStallParam Command Frame
Structure
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
1
1
OTP3
OTP2
OTP1
OTP0
HW
1
0
0
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Irun[3:0]
Ihold[3:0]
Vmax[3:0]
Vmin[3:0]
MinSamples[2:0]
Shaft
Acc[3:0]
AbsThr[3:0]
DelThr[3:0]
FS2StallEn[2:0]
AccShape StepMode[1:0] DC100StEn
Bit 0
0
0
1
1
PWMJEn
SetMotorParam
This command is provided to the circuit by the I²C master to set the values for the stepper motor parameters (listed below) in RAM.
Refer to Table 18 to see the meaning of the parameters sent by the I²C master.
Important: If a SetMotorParam occurs while a motion is ongoing, it will modify at once the motion parameters (see Position
Controller). Therefore the application should not change parameters other than Vmax and Vmin while a motion is running, otherwise
correct positioning cannot be guaranteed.
SetMotorParam corresponds to the following I²C command frame:
Byte Content
0
Address
1 Command
2
Data 1
3
Data 2
4
Data 3
5
Data 4
6
Data 5
7
Data 6
8
Data 7
Bit 7
1
1
1
1
1
SetMotorParam Command Frame
Structure
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
1
OTP3
OTP2
OTP1
OTP0
HW
0
0
0
1
0
0
1
1
1
1
1
1
1
1
1
1
1
1
Irun[3:0]
Ihold[3:0]
Vmax[3:0]
Vmin[3:0]
SecPos[10:8]
Shaft
Acc[3:0]
SecPos[7:0]
PWMfreq
1
AccShape StepMode[1:0]
1
Bit 0
0
1
1
1
PWMJEn
SetOTPParam
This command is provided to the circuit by the I²C master to program and zap the OTP data D[7:0] in OTP address OTPA[2:0].
Important: This command must be sent under a specific Vbb voltage value. See parameter VbbOTP in Table 5. This is a mandatory
condition to ensure reliable zapping.
SetOTPParam corresponds to the following I²C command frame:
SetOTPParam Command Frame
Byte Content
Structure
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
0
Address
1
1
OTP3
OTP2
OTP1
1 Command
1
0
0
1
0
2
Data 1
1
1
1
1
1
3
Data 2
1
1
1
1
1
4
Data 3
1
1
1
1
1
5
Data 4
D[7:0]
Where:
OTPA[2:0]: OTP address
D[7:0]: Corresponding OTP data
Bit 2
OTP0
0
1
1
Bit 1
HW
0
1
1
OTPA[2:0]
Bit 0
0
0
1
1
AMI Semiconductor – Apr. 2007, Rev 3.1, M-20664-003
50
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