AMIS-30621 Datasheet, PDF (29/43 Pages) AMI SEMICONDUCTOR – LIN Microstepping Motordriver

AMIS-30621 LIN Microstepping Motordriver
Data Sheet
Sleep
This command is provided to the circuit by the LIN Master
to put all the Slave nodes connected to the LIN bus into
sleep mode. If this command occurs during a motion of the
motor, TagPos is reprogrammed to SecPos (provided
SecPos is different from “100 0000 0000”), or a SoftStop
bit 7
0
bit 6
0
bit 5
1
bit 4
1
0x00
0xFF
bit 3
1
is executed before going to sleep mode. See LIN 1.2
specification and § 9.2.2.7.
The corresponding LIN frame is a Master Request
Command Frame (identifier 0x3C) with Data byte 1
containing 0x00 while the followings contain 0xFF.
bit 2
1
bit 1
bit 0
0
0
Identifier
Data1
Data2
SoftStop
If a SoftStop command occurs during a motion of the
stepper motor, it provokes an immediate deceleration to
VMIN (see § 8.3) followed by a stop, regardless of the
position reached. Once the motor is stopped, TagPos
register is overwritten with value in ActPos register to
ensure keeping the stop position.
Command SoftStop occurs in the following cases:
- The chip temperature rises above the Thermal shutdown
threshold (see § 5 and § 9.2.2.5);
- The LIN Master requests a SoftStop. Hence SoftStop
will correspond to the following 2 Data bytes LIN writing
frame (type #1).
Note
A SoftStop command occurring during a RunInit
sequence is not taken into account.
bit 7
*
1
Broad
bit 6
*
bit 5
0
*) according to parity computation
bit 4
ID4
bit 3
ID3
CMD[6:0] = 0x0F
AD[6:0]
bit 2
ID2
bit 1
ID1
bit 0
ID0
Identifier
Data1
Data2
If Broad = ‘0’ all the stepper motors connected to the LIN
bus will stop with deceleration.
AMI Semiconductor - Rev. 1.4
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