TMCM-342 Manual V1.01
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Copyright © 2008, TRINAMIC Motion Control GmbH & Co. KG
Example :
Using the TMC236 stepper motor driver with an SPI-interface
Pin 2
Pin 20
Pin 22
Pin 24
Pin 26
Pin 28
Pin 38
Pin 68
TMCM-342
M
TMC236
CSN
SDI
SCK
SDO
OUTA1
OUTA2
OUTB1
OUTB2
GND: Pin 2, 4, 6, 8
5V: Pin 1, 3
Figure 5.11: Application with an SPI-stepper motor driver
5.6
Power supply requirements with drivers
The TMCM-342 is supplied with +5VDC, the drivers need an additional power supply for the motor
supply. Please connect all listed pins for the power supply inputs and ground in parallel. It is
recommended to use capacitors of some 1000µF and a choke close to the drivers. This ensures a
stable power supply and minimizes noise injected into the power supply cables. The choke especially
becomes necessary with larger distributed systems using a common power supply.
V_Motor
GND
+
C (>1000µF)
L
+
Power Supply
keep distance short
local +5V
regulator
supply for further modules on
same base board
TMCM-342
Driver
+5V
GND
Figure 5.12: Power supply requirements for TMCM-342 with additional driver
Especially with bus controlled systems (e.g. CAN or RS485) it is important to ensure a stable ground
potential of all modules. The stepper driver modules draw peak currents of some Ampere from the
power supply. It has to be made sure, that this current does not cause a substantial voltage
difference on the interface lines between the module and the master, as disturbed transmissions
could result.
