Datasheet

TMC4361A Datasheet | Document Revision 1.22 • 2017-JAN-12
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Read entire documentation; especially the “Supplemental Directives” on page 224.
 MAIN MANUAL 
Target Reached / Position Comparison
In this section, TARGET_REACHED output pin configuration options are explained, as well as
different ways how to compare different values internally.
TARGET_REACHED output pin forwards the TARGET_REACHED_F lag. As soon as
XACTUAL equals XTARGET , TARGET_REACHED is active. Per default, the
TARGET_REACHED pin is high active.
To change the TARGET_REACHED output polarity, do the following:
Action:
 Set invert_pol_target_reached = 1 (bit16 of the GENERAL_CONF register 0x00).
Result:
TARGET_REACHED pin is low active.
TARGET_REACHED pins can also be configured for a shared signal line in the same
way as several INTR pins can configured for one interrupt signal transfer (see
section 5.4. (page 27).
To use a Wired-Or or Wired-And behavior, the below described order of
action must be executed:
Action:
 Step 1: Set intr_tr_pu_pd_en = 1 ( GENERAL_CONF register 0x00).
OPTION 1: WIRED-OR
Action:
 Step 2: Set tr_as_wired_and = 0 ( GENERAL_CONF register 0x00).
Result:
The TARGET_REACHED pin works efficiently as Wired-Or (default configuration).
i In case TARGET_REACHED pin is inactive, the pin drive has a weak inactive
polarity output. During active state, the output is driven strongly. Consequently,
if one of the connected pins is activated, the whole line is set to active polarity.
OPTION 2: WIRED-AND
Action:
 Step 2: Set tr_as_wired_and = 1 ( GENERAL_CONF register 0x00).
Result:
As long as the target position is not reached, the TARGET_REACHED pin has a strong
inactive polarity output. During active state, the pin drive has a weak active polarity
output. Consequently, the whole signal line is activated if all connected pins are
forwarding the active polarity.
Target Reached
Output Pin
Connecting
several
Target-reached
Pins