AMIS-30621 Datasheet, PDF (50/59 Pages) AMI SEMICONDUCTOR – LIN Microstepping Motordriver

AMIS−30621
A hardstop command can also be issued by the LIN master for some safety reasons. It corresponds then to the following
two data bytes LIN writing frame (type #1).
Table 47. HardStop WRITING FRAME TYPE #1
Structure
Byte
Content
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
Identifier
*
*
ID5
ID4
ID3
ID2
ID1
ID0
1
Data
1
CMD[6:0] = 0x05
2
Data
Broad
AD[6:0]
3
Checksum
Checksum over data
Where:
(*) According to parity computation
Broad: If broad = ‘0’ all stepper motors connected to the LIN bus will stop
ResetPosition
This command is provided to the circuit by the LIN master
to reset <ActPos> and <TagPos> registers to zero. This
can be helpful to prepare for instance a relative positioning.
The reset position command sets the internal flag
“Reference done”.
Note: The dynamic ID allocation has to be assigned to
‘General Purpose 2 Data bytes’ ROM pointer, i.e. ‘0000’.
The command is decoded only from the command data.
ResetPosition corresponds to the following LIN writing frames (type #1).
Table 48. ResetPosition WRITING FRAME TYPE #1
Structure
Byte
Content
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
Identifier
*
*
ID5
ID4
ID3
ID2
ID1
ID0
1
Data
1
CMD[6:0] = 0x06
2
Data
Broad
AD[6:0]
3
Checksum
Checksum over data
Where:
(*) According to parity computation
Broad: If broad = ‘0’ all the circuits connected to the LIN bus will reset their <ActPos> and <TagPos> registers
ResetToDefault
This command is provided to the circuit by the
LIN Master in order to reset to whole slave note into the
initial state. ResetToDefault will, for instance, overwrite the
RAM with the reset state of the registers parameters (See
RAM Registers). This is another way for the master to
initialize a slave node in case of emergency, or simply to
refresh the RAM content.
Note: the dynamic ID allocation has to be assigned to
‘General Purpose 2 Data bytes’ ROM pointer, i.e. ‘0000’.
The command is decoded only from the command data.
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