AMIS-30623 Datasheet, PDF (49/67 Pages) AMI SEMICONDUCTOR – LIN Microstepping Motordriver

AMIS-30623 LIN Microstepping Motordriver
Data Sheet
A
SetMotorParam
(RAM content is overwritten)
LIN bus OK
No
FailSafe = 1
No
Yes
Yes
SecPos ≠ 0x400
No
Yes
SleepEn = 1 No
Normal Function
Secure Positioning
to TagPos
Yes
SLEEP
Figure 28: Case A: LIN Lost During Normal Operation
STOP
LIN Lost Before or at Power-on
If the LIN communication is lost before or at power on, the ActPos register does not reflect the “real” actual position. So at LIN – lost a
referencing is started using DualPositioning. A first negative motion for half the positioner range is initiated until the stall position is
reached. The motion parameters stored in OTP will be used for this. After this mechanical end position is reached ActPos will be reset
to zero. A second motion will start to the Secure Position also stored in OTP. More details are given below.
B
FailSafe = 1
No
Yes
First motion of DualPosition
Half the position range
Negative direction
At Stall -> ActPos = '0000'
No
SecPos ≠ 0x400
SleepEn = 1
No
STOP
Yes
Yes
Secure Positioning
to SecPos stored in OTP
SLEEP
Figure 29: Case B: LIN Lost at or During Start-up
STOP
AMI Semiconductor – June 2006, Rev 3.0
49
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