AN103
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3.
Power Mode Jumper
– The power mode jumper (J7) determines the power supply source of the RF-EB.
The board can be supplied by the USB (J7 switched to the USB side) or the batteries (J7 switched to the
BAT side).
4.
Power Switch
– The power switch (SW1) allows the user to turn the RF-EB power on or off. It is
recommended that the user shall power off the RF-EB before plugging in or out the CMT2110A-EM.
5.
USB Socket
– A USB (type B) socket is used on the RF-EB. A USB cable is provided in the Development
Kits for the user to connect the RF-EB to the PC. The USB connection is for power supply only, not for data
communication.
6.
LCD
– A 128*64 pixels LCD is available on the RF-EB to display the information for the configuration and
demonstration in the Evaluation Scheme.
7.
Buttons
–There are 5 buttons (S1-S5) on the RF-EB next to the LCD for the user to complete the evaluation
modules configuration and demonstration following the step-by-step instructions shown on the LCD.
5.2 LCD Functional Icons
The Functional icons are displayed on the LCD to guide the user to go through the configuration process. The
functions are shown in the table below.
Table 3. LCD Functional Icons Descriptions
Functional Icon
Descriptions
Cursor pointer, the cursor pointer only points to the items which are configurable.
Move cursor pointer up and down.
Reset all configurations and return to the initial page.
Go back to the previous page.
Go forward to the next page.
Increase value or select the next option.
Decrease value or select the previous option.
Select to complete configuration and ready to start Tx/Rx.
Start transmitting. The pre-defined frame is transmitted repeatedly until the TxOff is
selected. This is only available when working with CMT2110A-EM.
Stop transmitting. This is only available when working with CMT2110A-EM.
Start receiving until the RxOff is selected. This is only available when working with
CMT2210A-EM.
Stop receiving. This is only available when working with CMT2210A-EM.
The user should notice the following points:
1. The RF-EB supports frequencies of 315 MHz and 433.92 MHz, when the frequency is changed from one to the
other, the matching network of the evaluation modules should be changed accordingly.
2. To allow successfully transmission between the Tx and the Rx, the frame format of the Rx evaluation module
must be set identical to that of the Tx evaluation module, see Table 4 for the frame format definition.
