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Product Profile

The TMC2208 is ultra-silent motor driver ICs for two phase stepper motors. Its pinning is compatible to a number of legacy drivers. TRINAMICs sophisticated stealthChop2 chopper ensures noiseless operation, maximum efficiency and best motor torque. Its fast current regulation and optional combination with spreadCycle allow for highly dynamic motion. Integrated power-MOSFETs handle motor current up to 1.4A RMS. Protection and diagnostic features support robust and reliable operation. A simple to use UART interface opens up more tuning and control options. Application specific tuning can be stored to OTP memory. Industries’ most advanced STEP/DIR stepper motor driver family upgrades designs to noiseless and most precise operation for cost effective and highly competitive solutions.

Product Link:

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    <source src="img/TMC2208/introduction.mp4" type="video/mp4">

Features Highlights

  • power tube built-in drive current 1.2A ,peak current 2A
  • 256 microsteps per fullstep
  • interpolation from lower input resolutions
  • stealthChop2 - for quiet positioning
  • spreadCycle - for high speed and high dynamics
  • Low RDSon LS 280mΩ & HS 290mΩ (typ. at 25°C)
  • Voltage Range 12V/24VDC
  • Single Wire UART for advanced configuration options
  • Integrated Pulse Generator for standalone motion


Hardware Configuration

Working mode and potentiometer description


Choice of working mode:MS1、MS2:

Working Current Reference:

UART mode

Note: TMC2208 v3.0 has two modes from our factory : step / dir and UART mode.

Customers can choose according to your own needs.

The user who purchases the step / dir mode driver shall perform the following hardware operations on the driver module before wiring (the user who purchases the UART mode driver does not need any welding operations):

Weld J2 as shown in the purple area, and put the driver in UART mode

The benefits of UART mode:

1.Motor current can be set arbitrarily by firmware.

2.Micro-steps can be set arbitrarily by firmware (up to 256 actual micro-steps);

3.The actual and interpolated microsteps can be combined to achieve maximum


4.Firmware can dynamically switch stepper motors between stealthChop2 and spreadCycle modes through UART.

5.When the motor is not moving, the standby current of the motor can be reduced dynamically (through UART).

Potentiometer regulation instructions:

Clockwise Rotating Potentiometer - Reduces Vref, thereby reducing drive current; Counterclockwise rotating potentiometer - Increase Vref, thereby increasing the driving current.

The accurate voltage of Vref can only be measured when the main board is supplied with 12V or 24V voltage.

The range of Vref value: default value: 1V (+0.2); MAX: 2V; MIN: 0V;Rotating potentiometer must not use too much force to prevent irreversible damage to the potentiometer; when the counter-clockwise rotation reaches the maximum, if it continues to rotate, it will become the minimum; similarly, when the clockwise rotation reaches the minimum, if it continues to rotate, it will become the maximum.

Software Configuration

For example,(Marlin-2.0)BIGTREETECH SKR V1.3 :

Configuration.h files

TMC2208 - means you want to control SilentStepStick through UART.

TMC2208_STANDALONE - does not use UART control but STEP/DIR .

TMC2208 SilentStepStick,In other words plug and play.

Configuration_adv.h files

Pins_BIGTREE_SKR_V1.3.h file

After the firmware is changed, burned the firmware and check whether the driver is correctly installed is detected.


  • When hardware chooses UART working mode, cautiously use soldering iron to prevent scalding hands. After treatment, carefully observe whether there is residual tin slag in the module. It must be cleaned up to prevent short circuit burning of the module.
  • Pay attention to the line sequence and IO port when wiring. If the wrong line is connected, the drive will not work.
  • When inserting drive into the main board, pay attention to see the direction of drive, can not insert backward, to prevent drive from burning.
  • Make sure to do a good job in heat dissipation (heat sink + heat dissipation fan) before driving to prevent abnormal operation of the drive.

Purchase Link:

If you have any issues with the product, please submit a support ticket.


BIQU Official Website:

BIGTREETECH Official Website:

Online Store:

BIGTREETECH Official Group:



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