AMIS-30623 AMI Semiconductor, Inc., AMIS-30623 Datasheet - Page 49

• Manufacturer Part Number: AMIS-30623
• Description: Lin Microstepping Motordriver
• Manufacturer: AMI Semiconductor, Inc.

AMIS-30623 LIN Microstepping Motordriver
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.
AMI Semiconductor – June 2006, Rev 3.0
www.amis.com
STOP
Normal Function
No
Yes
Figure 28: Case A: LIN Lost During Normal Operation
(RAM content is overwritten)
Figure 29: Case B: LIN Lost at or During Start-up
First motion of DualPosition
At Stall -> ActPos = '0000'
to SecPos stored in OTP
Half the position range
SetMotorParam
SecPos ≠
Secure Positioning
Negative direction
LIN bus OK
FailSafe = 1
A
Yes
Yes
B
0x400
SecPos ≠
Secure Positioning
49
No
FailSafe = 1
to TagPos
Yes
Yes
No
0x400
SleepEn = 1
SLEEP
Yes
No
No
SleepEn = 1
SLEEP
Yes
No
STOP
No
STOP
Data Sheet