AMIS-30621 LIN Micro-stepping Motor Driver
Data Sheet
SetMotorParam
This command is provided to the circuit by the LIN master to set the values for the stepper motor parameters (listed below) in RAM.
Refer to RAM Registers to see the meaning of the parameters sent by the LIN 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 other parameters than Vmax and Vmin while a motion is running, otherwise
correct positioning cannot be guaranteed.
SetMotorParamcorresponds to the following LIN writing frame with 0x3C identifier (type #4).
SetMotorParam Writing Frame
Byte
Content
Structure
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
1
1
1
1
0
0
0
1
2
3
4
5
6
7
8
Identifier
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7
Data 8
AppCMD = 0x80
1
CMD[6:0] = 0x09
AD[6:0]
Broad
Irun[3:0]
Vmax[3:0]
SecPos[10:8]
Ihold[3:0]
Vmin[3:0]
Acc[3:0]
Shaft
SecPos[7:0]
AccShape StepMode[1:0]
1
1
1
1
1
Where:
Broad:
If Broad = ‘0’ all the circuits connected to the LIN bus will set the parameters in their RAMs as
requested.
SetOTPparam
This command is provided to the circuit by the LIN master to program the content D[7:0]of the OTP memory byte OTPA[2:0], and to
zap it.
Important: This command must be sent under a specific Vbb voltage value. See parameter VbbOTP in DC Parameters. This is a
mandatory condition to ensure reliable zapping.
SetOTPParamcorresponds to a 0x3C LIN writing frames (type #4).
SetOTPParam Writing Frame
Byte
Content
Structure
Bit 7
Bit 6
Bit 5
Bit 4 Bit 3
Bit 2
Bit 1
Bit 0
0
0
1
1
1
1
0
0
0
1
2
3
4
5
6
7
Identifier
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7
Data 8
AppCMD = 0x80
1
Broad
1
CMD[6:0] = 0x10
AD[6:0]
1
D[7:0]
0xFF
1
1
1
OTPA[2:0]
0xFF
0xFF
8
Where:
Broad:
If Broad = ‘0’ all the circuits connected to the LIN bus will set the parameters in their OTP memories
as requested.
AMI Semiconductor – Sept. 2007, Rev 1.5
49
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