Switch Value Output of TFmini Plus v1.0
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Switch Value Output of TFmini Plus
1 Introduction
For the performance and considerations of TFmini Plus, please refer to the corresponding
specifications and manual. This manual is only a reference for modifying the TFmini Plus to a
switch value signal output. The switch value here is the active signal (step signal) 0 or 1. The
corresponding voltage of 0 is 0V and that of 1 is 3.3V.
2 Line Sequence
The TFmini Plus has four connection lines, which are 5V power line, GND, receive line (RXD),
and transmit line (TXD). The switch value signal is given by the transmit line (TXD) and forms a
reference voltage with GND.
Table5: The Function and Connection Description of each pin
High and low level detection
TFmini Plus has a 30cm long connecting wire with a GH1.25-4P (Molex51021-0400)
connector. The connecting wire can be extended as needs. To ensure effective data transmission, the
length of connecting wire should be short than 1m.
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