User Guide
WiMOD - Demo Board
Functional Overview
DemoBoard_UserGuide.doc, Wireless Solutions, V2.4
page 6 of 23
LEDs
D1, D2, D3 & D4
Pin 1 on X7
(I/O Connector 3)
Pin 1 on X5
(I/O Connector 1)
Pin 1 on X4
(Programming
Connector)
Pin 1 on X3
(Programming
Connector)
Pin 1 on X1
(RM Connector 1)
LED D5
(USB status)
Jumper
JP1
Push button B4
(RESET)
Sliding switch S1
(Power-Select)
Battery
Connector
Pin 1 on X2
(RM Connector 2)
Potentiometer
Push button
B1, B2 & B3
Buzzer
Pin 1 on X6
(I/O Connector 2)
DIP switch
Temperature
sensor
LED D6
(Power status)
Pin 1 on X10
(Aref)
Figure 2-2: Functional Units of the Demo Board
2.1
Power Supply
The Demo Board and the attached radio module may be powered from either two “AAA” size
batteries or from the USB bus when connected to a USB port on a PC. The sliding switch S1
toggles between these power sources and must be switched to the wanted power source. In
position “USB” the USB bus voltage together with a voltage regulator (3 V) is used. In position
“BAT” the battery voltage is used directly. LED 6 is turned on when the Demo Board is powered
on. Additionally LED 5 is turned on if a USB connection to a PC is established. It is
recommended either to use the battery or the USB power, thus S1 can be used as on-off-switch.
To supply the radio module with power jumper JP1 must be set. Furthermore it can be replaced
by an ampere meter to measure the current of the radio module. Note: Some adapter boards
are equipped with a boost converter to increase the radio modules supply voltage (e.g. iM871A
AB_05). In this cases the current measurement has to be done directly on the adapter board.
Power supply of the Demo Board (except the USB interface) and the attached radio module is
interrupted if push button B4 is pressed. Because all radio modules have a Power-On-Reset
(POR) functionality B4 serves as the “RESET” button.
