User Manual

PD42-x-1140 Hardware Manual (V1.03 / 2018-JAN-25) 17
Copyright © 2012-2018, TRINAMIC Motion Control GmbH & Co. KG
VDD
microcontroller
GND
Figure 4.8 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 4.9 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).