Pinbelegung und Versorgung

Information zu den Pinfunktionen und der Stromversorgung.


TMC2xxx v1.x

Pinout v1

TMC516x and TMC2xxx v2.x

Pinout v2


Power Supply
VMMotor Supply Voltage
VIOLogic Supply Voltage
Motor Outputs
M1AMotor Coil 1
M1BMotor Coil 1
M2AMotor Coil 2
M2BMotor Coil 2
Control Inputs
STEPStep-Signal Input
DIRDirection-Signal Input
ENEnable Motor Outputs: GND=on, VIO=off, TMC21x0: OPEN=Auto-Power-Down
CFG0Chopper Off Time TOFF: GND=140tclk, VIO=236tclk, OPEN=332tclk
CFG3Current Setting: GND=int, VIO=int, OPEN=ext
CFG4Chopper Hysteresis HEND: GND=5, VIO=9, OPEN=13
CFG5Chopper Blank Time TBL: GND=16, VIO=24, OPEN=36
DIAG0Diagnostics Output 0 (50k pull-up to 2.5V)
DIAG1Diagnostics Output 1 (100k pull-down to GND)
VREFAnalog Reference Voltage
TMC2130 (SPI mode, SPI jumper open)
SDO/CFG0MISO - Serial Data Output, tpu
SDI/CFG1MOSI - Serial Data Input, tpu
SCK/CFG2SCLK - Serial Clock Input, tpu
CS/CFG3SS - Chip Select Input, tpu
DCEN/CFG4dcStep Enable Input, tpu (GND=off)
DCIN/CFG5dcStep Gating Input, tpu
DCOdcStep Ready Output
DIAG0Diagnostics Output 0 (50k pull-up to 2.5V)
DIAG1Diagnostics Output 1 (100k pull-down to GND)
VREFAnalog Reference Voltage
CFG1/MS1Step-Configuration, pd
CFG2/MS2Step-Configuration, pd
PDNUART and Auto Power Down Control, pd: GND=on, VIO=off
DIAGDiagnostics Output (VIO=error)
INDEXIndex Output (one pulse per each four fullsteps)
VREFAnalog Reference Voltage
TMC5160 (SPI mode)
SDO/CFG0MISO - Serial Data Output
SDI/CFG1MOSI - Serial Data Input
SCK/CFG2SCLK - Serial Clock Input
CS/CFG3SS - Chip Select Input (no internal pull-up resistor)
CLKClock input (connect to GND on v1.3)
DCEN/CFG4dcStep Enable Input, pd (GND=off)
DCIN/CFG5dcStep Gating Input, pd
DCOdcStep Ready Output
DIAG0Diagnostics Output 0 (50k pull-up to 2.5V)
DIAG1Diagnostics Output 1 (100k pull-down to GND)
  • pd - Pin mit Pull-Down Widerstand (nach Masse)
  • pu - Pin mit Pull-Up Widerstand (nach VIO)
  • tpu - Pin mit Pull-Up Widerstand oder Toggle-Detection im Standalone-Modus (SPI_MODE=0)

TMC21x0 Schrittkonfiguration


TMC220x Schrittkonfiguration


Other modes and options can be set via UART (see TMC2208 Configurator).


The motor supply voltage VM is a strong power supply with a high voltage. Always ensure that there cannot occur voltage spikes on power up. Further Information: Pololu - Understanding Destructive LC Voltage Spikes.

A 100uF capacitor (low ESR) near every SilentStepStick driver is recommended for best performance and for supply voltages >=24V a suppressor diode (TVS diode) for over-voltage protection.

Only after the logic supply voltage VIO is present and stable, the driver inputs (STEP, DIR, EN, CFG…) can be driven with a high level.

If the motor is running/moving, then it is not allowed to switch off the power supply. Always make sure that the motor stands still and the motor outputs are deativated on shutting down, otherwise the driver IC can get damaged (because of back EMF). An emergency stop can be realized, when the EN pin is set to VIO (high). This will switch off all motor output drivers and will put the motor into freewheeling.

SilentStepSticks mit variabler 3-5V Logikspannung

At power-up the motor supply voltage VM should come up first and then the logic supply voltage VIO. On power-down the logic supply voltage VIO should turned off at first and then the motor supply voltage VM, because the internal logic of the TMC2xxx driver is powered from VM. To ensure the correct powering a schottky diode from VIO (anode) to VM (cathode) can be added. The v2 Protectors for SilentStepSticks include this schottky diode.

SilentStepSticks mit 5V Logikspannung

There is no special power-up or power-down sequence needed. If the SilentStepStick is only powered with 5V (logic) then a current can flow backwards to VM. In this case it is not allowed to enable the driver (motor outputs) and no loads (e.g. fans) should be on VM (<=4V), because the current will be drawn from the logic supply VIO.