AMIS30621C6213RG ON Semiconductor, AMIS30621C6213RG Datasheet - Page 41

• Manufacturer Part Number: AMIS30621C6213RG
• Description: IC MOTOR DRIVER/CTLR 20-SOIC
• Manufacturer: ON Semiconductor

Specifications of AMIS30621C6213RG

• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: 800mA
• Voltage - Supply: 6.5 V ~ 29 V
• Operating Temperature: -40°C ~ 165°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

LIN Lost Behavior
Introduction
25000 consecutive frames (= 1.30 s @ 19200 kbit/s)
AMIS−30621 sets an internal flag called “LIN lost”.
Dependant on the contents of RAM register SecPos[10:0] a
motion to the secure position will start followed by entering
the sleep mode.
Motion to Secure Position
the predefined secure position SecPos[10:0]. This
positioning starts after the detection of lost LIN
communication and in case RAM register SecPos[10:0] 0
0x400. The functional behavior depends if LIN
communication is lost during normal operation (see
Figure 25 case A) or at (or before) start−up (See Figure 25
state SHUTDOWN):
LIN Lost During Normal Operation
it is assumed that AMIS−30621 is referenced. In other words
the ActPos register contains the “real” actual position. At
LIN – lost an absolute positioning to the stored secure
position SecPos is done. This is further called secure
positioning. Following sequence will be followed. See
Figure 26.
Figure 25. Flow Chart Powerup of AMIS−30621. Case
When the LIN communication is broken for a duration of
AMIS−30621 is able to perform an autonomous motion to
If the LIN communication is lost during normal operation,
A: LIN Lost During Operation and LIN Lost at
SHUTDOWN
Start−up Resulting in Shutdown
No
(LIN communication ON)
OTP content is
copied in RAM
GetFullStatus
LIN bus OK
Power Up
Yes
A
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be different from OTP register if earlier LIN master
communication has updated this. See also Secure Position
and command SetMotorParam.
Important Remarks:
LIN Lost Before or at Power On
correct GetFullStatus command is received. For that reason
the ShutDown state is not left and the stepper motor is kept
un−powered.
Figure 26. Case A: LIN Lost During Normal Operation
Normal Function
“SecPos[10:0]” from RAM register will be used. This can
If the LIN communication is lost before or at power on, no
I.
II.
1. If the LIN communication is lost there are two
1. The secure position has a resolution of 11 bit.
2. Same behavior in case of HW2 float (= lost LIN
Yes
possibilities:
address). See also Hardwired Address HW2
(RAM content is overwritten)
If SecPos[10:0] = 0x400:
No secure positioning will be performed
AMIS−30621 will enter the SLEEP state
If SecPos[10:0] 0 0x400:
Perform a secure positioning. This is an
absolute positioning (slave knows its ActPos.
SecPos[10:0] will be copied in TagPos).
After the positioning is finished AMIS−30621
will enter the SLEEP state.
SetMotorParam
LIN bus OK
A
Secure Positioning
SecPos 0 0x400
No
to TagPos
SLEEP
Yes
No
SLEEP