Datasheet

TMC4361A Datasheet | Document Revision 1.22 • 2017-JAN-12
152/230
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Read entire documentation; especially the “Supplemental Directives” on page 224.
 MAIN MANUAL 
For some applications it can be useful to limit the difference between two consecutive
encoder data values; for instance, if encoder data lines are subject to too much noise.
Per default, encoder data values can show a difference of 1/8
th
per encoder revolution,
only if the limitation is enabled. The difference can be configured to a smaller value,
if necessary.
In order to enable and configure encoder data variation limitation, do as
follows:
Action:
 OPTIONAL: Set proper SER_ENC_VARIATION register 0x63 (7:0).
 Set serial_enc_variation_limit =1 ( ENC_IN_CONF register 0x07).
Result:
The encoder data value that is received subsequently must not exceed the previous
data more than:
Maximum tolerated deviation = SER_ENC_VARIATION / 256 · 1/8 · ENC_IN_RES.
In case the variation exceeds the above mentioned limit, the new data value is
rejected internally and the status flag SER_ENC_DATA_FAIL is raised.
i In case SER_ENC_VARIATION = 0, the limit is defined by 1/8 · ENC_IN_RES.
Emitting Encoder
Data Variation