User Manual

TMCM-1140 V1.3 Hardware Manual (Rev. 1.04 / 2015-JAN-05) 14
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VDD
microcontroller
GND
Figure 3.9 General purpose output OUT_0 (simplified circuit)
With TMCL firmware OUT_0 can be switched on (OUT_0 pulled low) using command SIO 0, 2, 1 and
off again (OUT_0 floating) using command SIO 0, 2, 0 (this is also the factory default setting of this
output). In case a floating output is not desired in the application an external resistor to e.g. supply
voltage may be added.
In contrast OUT_1 is able to supply +5V (sourcing 100mA max.) to an external load. An integrated P-
channel MOSFET allows switching on / off this +5V supply in software (see figure below). This output
might be used in order to supply +5V to an external encoder circuit. Please note that the +5V supply has
to be activated explicitly in software.
+5V
microcontroller
GND
OUT_0
GND
100pF
10k
Figure 3.10 General purpose output OUT_1 (simplified circuit)
With TMCL firmware OUT_1 can be switched on (supply +5V to external circuit) using command SIO 1,
2, 1 and off (output pulled low via 10k pull-down resistor) using command SIO 1, 2, 0 (this is also
the factory default setting of this output).
3.3.3 Motor Connector
As motor connector a 4pin CVIlux CI0104P1VK0-LF 2mm pitch single row connector is available. The
motor connector is used for connecting the four motor wires of the two motor coils of the bipolar
stepper motor to the electronics.
4
1
Pin
Label
Direction
Description
1
OB2
Output
Pin 2 of motor coil B
2
OB1
Output
Pin 1 of motor coil B
3
OA2
Output
Pin 2 of motor coil A
4
OA1
Output
Pin 1 of motor coil A
Table 3.5 Motor connector
Example for connecting the QSH4218 NEMA 17 / 42mm stepper motors:
TMCM-1140
QS4218 Motor