AMIS-30622_13 Datasheet, PDF (46/50 Pages) ON Semiconductor – I2C Micro-Stepping Motor Driver

AMIS−30622
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 19 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 corresponds to the following I²C
command frame:). Therefore the application should not
change parameters other than Vmax while a motion is
running, otherwise correct positioning cannot be
guaranteed.
SetMotorParam
Table 38. SetMotorParam COMMAND FRAME
Structure
Byte
0
1
Content
Address
Command
Bit 7
1
1
Bit 6
1
0
Bit 5
OTP3
0
Bit 4
OTP2
0
Bit 3
OTP1
1
Bit 2
OTP0
0
Bit 1
HW
0
Bit 0
0
1
2
Data 1
1
1
1
1
1
1
1
1
3
Data 2
1
1
1
1
1
1
1
1
4
Data 3
Irun[3:0]
Ihold[3:0]
5
Data 4
Vmax[3:0]
Vmin[3:0]
6
Data 5
SecPos[10:8]
Shaft
Acc[3:0]
7
Data 6
SecPos[7:0]
8
Data 7
1
1
1
AccShape
StepMode[1:0]
1
1
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
V_BB voltage value. See parameter V_BBOTP in Table 5. This
is a mandatory condition to ensure reliable zapping.
SetOTPParam corresponds to the following I²C command frame:
Table 39. SetOTPParam COMMAND FRAME
Structure
Byte
Content
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
Address
1
1
OTP3
OTP2
OTP1 OTP0
HW
0
1
Command
1
0
0
1
0
0
0
0
2
Data 1
1
1
1
1
1
1
1
1
3
Data 2
1
1
1
1
1
1
1
1
4
Data 3
1
1
1
1
1
OTPA[2:0]
5
Data 4
D[7:0]
Where:
OTPA[2:0]:
D[7:0]:
OTP address
Corresponding OTP data
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