User Guide
WiMOD - Demo Board
Functional Overview
DemoBoard_UserGuide.doc, Wireless Solutions, V2.4
page 8 of 23
Button/Switch
Available on
Description
S1 – Sliding switch
-
Power select switch.
B1 – Push-Button
X5.7
Useable by the attached radio module.
B2 – Push-Button
X5.9
Useable by the attached radio module.
B3 – Push-Button
X5.1
Useable by the attached radio module.
B4 – Push-Button
-
Power-On-RESET switch (interrupts the power supply).
Dip1_1 – DIP switch 1
X5.3
Useable by the attached radio module.
Dip1_2 – DIP switch 2
X5.15
Useable by the attached radio module.
Table 2-2: Connections of Switches and Buttons
Sliding switch S1 selects the power supply (BAT or USB) and button B4 interrupts the power
supply when pressed.
The push buttons B1 to B3 and the DIP switches Dip1_1 and Dip1_2 can be connected to the
attached radio module by using jumpers or connecting cables on the I/O connectors. All of
them have a pull-up resistor and pushing a button or shifting a DIP switch to position ON causes
the corresponding pin on the I/O connector to be pulled to GND (falling edge) while releasing
will result in a signal with VCC level.
Other units of the Demo Board are explained in Table 2-3. They can be connected to the
attached radio module by using jumpers or connecting cables on the I/O connectors.
Function
Available on
Description
Potentiometer
X5.11
Variable resistor
Buzzer
X5.13
Buzzer
Temperature
Sensor
Thermostat Output
X7.1
Thermostat Output Open Drain of the temperature
sensor (IC4)
Sensor_SDA
X7.5
Data input/output line for 2-Wire serial communication
port of the temperature sensor (IC4)
Sensor_SCL
X7.3
Clock input line for 2-wire serial communication port of
the temperature sensor (IC4).
Table 2-3: Connections of other Functional Units
The potentiometer (trim-pot) provides an analog (voltage) input signal. The value is between
GND and approx. 0.7 V.
The buzzer is a piezoelectric sounder and must be externally driven by a signal. Frequency of this
signal must be between 2 kHz and 4 kHz.
The temperature sensor DS75LX is a digital thermometer and thermostat. It measures
temperatures from -55 °C to +125 °C. Resolution of the digital output signal is 9 to 12 bits.
Communication is achieved through a simple 2-Wire Serial Interface (SDA and SCL).
