Data Sheet

signals from other devices. It is pulled low by the LED and a 100 kΩ pull-down resistor. The voltage on
the Tic’s microcontroller pin must reach at least 2 V for the input to be guaranteed to read as high.
Schematic diagram of the Tic ERR pin
when it is acting as an output (i.e.
there are errors).
Schematic diagram of the Tic ERR pin
when it is acting as an input (i.e. there
are no errors).
You can connect the ERR lines of multiple Tics together so that when one of the Tics experiences an
error and drives its ERR line high, all of the Tics will be notified about the error and shut down. Each
Tic you add to the system will load down the ERR lines of the other Tics, so there is a limit to how many
Tics you can connect in this way. It should work fine with 5 or fewer Tics. You can probably connect
more than that, but at some point, there would be too much load for a single Tic to shut down all of the
others. If you want to connect many Tic ERR lines together and find this to be a problem, you could
desolder or disconnect the red LED on several of the Tics to reduce that load.
Condition: RC/analog input not ready
The Tic cannot instantly determine the value of its RC or analog inputs: it takes some time for the Tic
to get readings and compute averages. In RC and analog control modes, the “RC/analog input not
ready” condition prevents the Tic from going into normal operation until its input is ready. This is a
temporary condition that should last for at most 500 ms. It only happens right after the Tic starts up,
receives a Reset command, or changes its control mode.
Condition: Coil current stabilizing
This condition prevents the Tic from going into normal operation within 10 milliseconds after it changes
from the special current limit during error back to the normal current limit, or within 10 milliseconds of
resetting the stepper driver.
Effect: De-energize
When the Tic is in the “Reset” or “De-energized” state, it will disable the driver (by driving its ENBL pin
Tic Stepper Motor Controller User’s Guide © 2001–2018 Pololu Corporation
5. Details Page 73 of 150