TMCM-1260 Hardware Manual • Hardware Version V1.10 | Document Revision V1.20 • 2018-05-17
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7 I/Os
The I/O connector (8pin JST PH series) offers one analog input, two non-isolated digital inputs with
integrated pull-ups (programmable) and two optically isolated inputs. All inputs can be used for different
purposes explained in more detail in the following subsections.
7.1 Analog input IN0
The TMCM-1260 offers one analog input. The analog input voltage range is approx. 0..+10V. For voltages
above +10V saturation takes place but, up-to 30V higher voltages are tolerated without destroying the input.
For analog to digital conversion the integrated ADC of the on-board microcontroller is used. Resolution of
this converter is 12bit (0..4095).
100nF
10k
22k
2k2
+3V3
microcontroller
microcontroller
IN0
+5V
TMCM-1260
pull-up
disabled
V
0..10V
Figure 5: Analog input IN0
The analog input can be used as digital input, also. There is an integrated pull-up to +5V which can be
switched on of off in software. When using this input as anlog input the pull-up should be usually switched
off.
7.2 Digital inputs IN1 and IN2
The TMCM-1260 offers two digital inputs IN1 and IN2 which accept signals between 0 and 30V with voltages
above approx. 2.9V recognized as logical ’1’ and below 1V as logical ’0’. Both inputs offer intergated pull-ups
to +5V which can be switched on or off in software (always together). When using the inputs with low-side
switches (connected to GND), pull-ups usually should be switched on (default). In case high-side switches
are used the pull-ups must be switched off. For push-pull signals the pull-ups may be either switched on
or off.
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