Generic Output Clock/Data Port; Temperature Sensor Via I2C - Elatec TWN4 MultiTech Nano Technical Handbook

3. Using Peripherals

3.3. Generic Output Clock/Data Port

This port is an output-only port consisting of 3 single-ended signals driven through the Nano Module GPIO.
Due to its generality, an OMRON, Wiegand, or a custom interface can be implemented here. A pin can take
on a data or a clock functionality, depending on the User's requirements. There is an inverse relationship
between the GPIOs and these 3 output pins:
• CIR (OMRON) = ~GPIO 4
• D0 (Wiegand) / Data (OMRON) = ~GPIO 5
• D1 (Wiegand) / Clock (OMRON) = ~GPIO 6
As described in Section 2.2, the I/O Extender can powered through either the Development Board itself,
or an external supply. If no external supply is used, then the Generic port will be operated at 5V. Please
connect a Jumper on J1 (2 pins closest to LCD Display). The User is also free to provide an external supply
source (7V - 28V). In this case, please connect a Jumper on J1 (2 pins farthest from LCD Display).
2 out of the 3 output ports (D0 and D1) can be operated from the variable external supply. The CIR output
is operated from a fixed 5V supply.
A Relay port is available for debug and demonstration purposes. The relay switch is controlled on the
board by the CIR pin of the Generic port. When CIR is at ground level, the coil within the relay is under
voltage, causing pins 2 and 3 of the Relay port to be shorted. When CIR is brought up to 5V, the voltage
across the relay coil is marginal, causing pins 1 and 2 of the Relay port to be shorted.
The Relay port also has a signal "IN1" that can be configured as either input or output with respect to GPIO
7. A push-button is also present on the board to drive this net to ground, regardless of the state of the
GPIO.
For the pinouts of Generic port and Relay port, please see Tables A.3 and A.4 respectively.

3.4. Temperature Sensor via I2C

The Temperature Sensor device used is SE95D. Its I2C Slave address is 0x48 (address pins A0, A1, A2
are grounded on the board). It is connected directly to the I2C port of the Nano Module. Please see the
Nano Module API Guide for further information.
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