AMIS-30623 Datasheet, PDF (27/67 Pages) AMI SEMICONDUCTOR – LIN Microstepping Motordriver

AMIS-30623 LIN Microstepping Motordriver
Data Sheet
Table 18: OTP Overwrite Protection
Lock bit
LOCKBT (factory zapped before delivery)
LOCKBG
0x00 to 0x01
0x00 to 0x07
Protected bytes
The command used to load the application parameters via the LIN 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 to verify the correct byte zapping.
Note: zapped bits will really be “active” after a GetOTPparam or a ResetToDefault command or after a power-up.
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 a LIN writing operation.
PA[3:0]
In combination with HW[2:0] it forms the physical address AD[6:0]of the stepper-motor. Up to 128 Stepper-motors can
theoretically be connected to the same LIN bus
AbsThr[3:0]
Absolute and Relative 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]
Absolute and 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
AMI Semiconductor – June 2006, Rev 3.0
27
www.amis.com