TMC4331A Datasheet, PDF (19/178 Pages) TRINAMIC Motion Control GmbH & Co. KG. – SPI Interfaces for μC with easy-to-use protocol.

TMC4331A Datasheet | Document Revision 1.00 • 2016-NOV-10
19/178
Input Filtering Examples
The following three examples depict input pin filtering of three different input filtering groups.
i After passing Schmitt trigger, voltage levels are compared to internal signals, which are processed by
the motion controller.
i The sample points are depicted as green dashed lines.
Example 1:
Reference Input
Pins
In this example every second clock cycle is sampled. Two sampled input
bits must be equal to receive a valid input voltage.
CLK
HOME
internal
home signal
STOPL
internal left
stop signal
Figure 15: Reference Input Pins: SR_REF = 1, FILT_L_REF = 1
Example 2:
START Input Pin
This example shows the START input pattern at every fourth clock cycle:
CLK
START
internal Start
input signal
START
internal Start
input signal
Figure 16: START Input Pin: SR_S = 2, FILT_L_S = 0
Example 3: S/D
Input Pins
This example shows every clock cycle bit. Eight sampled input bits must be
equal to receive a valid input voltage.
CLK
STPIN
internal stpin
input signal
DIRIN
internal
dirin signal
Figure 17: S/D Input Pins: SR_SD_IN = 0, FILT_L_SD_IN = 7
© 2015 TRINAMIC Motion Control GmbH & Co. KG, Hamburg, Germany — Terms of delivery and rights
to technical change reserved. Download newest version at: www.trinamic.com .
Read entire documentation; especially the “Supplemental Directives” on page 172.
 MAIN MANUAL 