TMC4330A Datasheet | Document Revision 1.01 • 2017-JAN-12
23/166
Connection of Multiple INTR Pins
INTR pin can be configured for a shared interrupt signal line of several TMC4330A interrupt
signals to the microcontroller.
Connecting
several
In order to make use of a Wired-Or or Wired-And behavior, the below
described actions must be taken:
Interrupt Pins
Action:
Step 1: Set intr_tr_pu_pd_en = 1 (GENERAL_CONF register 0x00).
OPTION 1: WIRED-OR
Action:
Step 2: Set intr_as_wired_and = 0 (GENERAL_CONF register 0x00).
Result:
The INTR pin works efficiently as Wired-Or (default configuration).
i
In case INTR pin is inactive, the pin drive has a weak inactive polarity output. If
one of the connected pins is activated, the whole line is set to active polarity.
OPTION 2: WIRED-AND
Action:
Step 2: Set intr_as_wired_and = 1 of the GENERAL_CONF register 0x00.
Result:
In case no interrupt is active, the INTR pin has a strong inactive polarity output. During
the active state, the pin drive has a weak active polarity output. Consequently, the
whole signal line is activated in case all pins are forwarding the active polarity.
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