TMCM-342 Manual V1.01
12/26
Copyright © 2008, TRINAMIC Motion Control GmbH & Co. KG
5.4
Step-/Direction output
The TMCM-342 generates step- and direction output signals, which are pre-conditioned in order to be
directly connected to microstep driver units with 5V inputs. See Figure 5.5 for the output timing.
Some driver units might require inverters / level shifters in order to adapt step polarity and voltage.
You can use standard open collector level shifters like the SN7407 or inverters like SN7406. These
devices allow level translation to 12V or 24V, or inversion of the step signal, if the device timing
requires this. One 7406 or 7407 can shift all six output signals. In order not to loose any steps, please
make sure that your driver unit can work with the step-to-direction delay and with the step impulse
length.
old direction signal
DIR output
STEP output
internal
TMC428 step
signal
t
S2DIR
=1.8 µs
t
SPULSE
=1.8 µs
Step impulse
new direction signal
First step in new direction initiated by user
Figure 5.5: Step-/Direction output signals
5.5
Connecting the drivers
Because there are no stepper motor drivers included on the TMCM-342, an Add-On-Board has to be
developed to drive the stepper motors. Some examples of Trinamic´s own driver modules are added
below. Please refer to
for more information. Normally, a step/direction interface is
used to connect the driver. Using the SPI interface would also be possible, but is normally not used
with this module (compare TMCM-301 for SPI applications).
5.5.1
Connecting the TMCM-342 to a power driver module with
Step/Direction-Interface
Pin Number
Direction
Name
Limits
Description
31
Out
STEP_M0
TTL
Step-Signal for Driver 0
33
Out
DIR_M0
TTL
Direction-Signal for Driver 0
35
Out
STEP_M1
TTL
Step-Signal for Driver 1
37
Out
DIR_M1
TTL
Direction-Signal for Driver 1
39
Out
STEP_M2
TTL
Direction-Signal for Driver 2
41
Out
DIR_M2
TTL
Serial Clock for the Driver 2
Table 5.5: Pinout for using the Step/Direction-Interface
