Si4010 Key Fob Demo Description - Silicon Laboratories Si4010 User Manual

3. Requirements
The following items are required to use the demo in standalone mode:
 LCD Base Board
 RF Pico Board with EZRadio Next Generation chip
 3xAA batteries or USB Mini-B cable
 Si4010 key fob on 316.66/433.9/868.30/917.00 MHz

4. Si4010 Key Fob Demo Description

The AES demo utilizes the capabilities of the Si4010 key fob transmitter and the Si4355 EZRadio receiver in order
to demonstrate a one-way secure link application.
The Si4010 key fob as the transmitter sends radio packets with partially encoded content. At the receiver side an
EZRadio receiver, the Si4355 chip receives the packet, then evaluates and decodes it.
The receiver can handle OOK or 2FSK modulated RF packets as well as the transmitter can set up to transmit
OOK or 2FSK modulated RF packets.
4.1. RF Parameters
The Si4010 AES Demo transmitter and receiver uses the following RF configuration:
 Center frequencies: 316.66/433.92/868.3/917 MHz depending on RF Pico board and key fob
 OOK/2FSK modulation (selectable)
 9.6 kBaud

Manchester coding in OOK mode (results in 4.8 kbps data rate).
4.2. Selection of Si4010 Key Fob Modulation
The Si4010 key fob can modulate RF packets in OOK/2FSK. In order to select the appropriate modulation type,
follow the steps below:
1. Open the plastic case of the key fob.
2. Remove the battery and wait for 30 seconds to discharge capacitors.
3. For 2FSK modulation, place the battery back and make sure that no buttons are pressed during battery
insertion.
4. For OOK modulation, press and hold the center button on the key fob during the battery insertion process.
5. Fit the plastic case of the key fob.
4.3. RF Packet Formats
The packet format sent by the Si4010 is as follows:
Preamble Sync
13 byte 2 byte
Si4010 Keyfob AES DEMO
Table 1. RF Packet Format
Chip ID Status
4 byte 1 byte
Rev 0.2
Counter CRC
2 byte 2 byte
AES part CRC
16 byte 2 byte
3