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The key fob demo board has five push buttons and one LED output. The receiver demo board has four LEDs to display received key fob commands. The provided software pack contains all the documentation and files needed to develop a user application. software debugging and the use of the Keil C compiler, assembler, and linker toolchain. Contains demo applications using API functions and the key fob demo application. Table 1. Kit Content
1 MSC-PLPB_1 Key Fob Plastic Case (translucent grey)
2 AAA AAA alkaline battery
1 CRD2032 CR2032 3 V coin battery
Rev. 0.2 3 3. RF Parameters The demo kit uses the following RF parameters according to the kit’s frequency band. The modulation is FSK. 4. Transmitter Side Program The Si4010 in the key fob programmed with the rke_demo_2 program. Since the program is burned in the NVM (OTP) memory of the Si4010, it cannot be changed. T he whole rke_demo_2 software project can be found in the example programs package of the Si4010. It is available at the web page http://www.silabs.com/products/wireless/EZRadio/Pages/Si4010.aspx on the Tools tab. The key fob transmits an RF packet three times each time a button is pressed, and it also blinks the LED on the key fob. The packet structure is as follows: Symbol rate is 9.6 kBd. Each packet contains 18 additional bytes that are not received by the receiver of this demo. These additional bytes are AES-encrypted and are used by the AES demo kit. See details in the user’s guide of the AES demo kit (P/N 4010-AESK1W-434). In the key fob program the frequency and deviation is pin- selected by the pcb layout. This operating frequency is indicated on a label on the back of the key fob pcb. The 316.667 MHz key fob is available in the 4010-AESK1W-315 demo kit or separately from Silicon Labs. The key fob’s default modulation is FSK but if the middle button is pressed and held during battery insertion, the modulation will be OOK until the next powerdown (battery removal). Kit Part Number Center Frequency Deviation EZR-LEDK1W-434 433.92 MHz 59 kHz EZR-LEDK1W-868 868.30 MHz 119 kHz EZR-LEDK1W-917 917.00 MHz 120 kHz Number of Bytes Field Name Description
13 Preamble 0xaa
2 Sync 0x2d, 0xd4
4 Chip ID Unique, factory-burned chip ID
1 Status Lower 5 bits are the button information
2 Packet count Rolling coun ter for PER measurement
2 CRC-16 Generator X16+X15+X2+1, start value 0xFFFF
GPIO8 GPIO9 Center Frequency Deviation High Low 316.66 MHz 43 kHz High High 433.92 MHz 59 kHz Low High 868.30 MHz 119 kHz Low Low 917.00 MHz 120 kHz
4 Rev. 0.2 5. Receive Side Program The 8051F930 MCU on the RFStick transmitter board is factory-programmed with the stx_demo program. Since the program is programmed in flash memory, it can be overwritten using a Silicon Labs Toolstick Base Adapter that is part of the Si4010 development kit or can be ordered separately as well (P/N Toolstick_BA). The complete stx_demo software project can be found in the example programs package of the Si4355. It is available at the web page http://www.silabs.com/products/wireless/EZRadio/Pages/Si4355.aspx on the Tools tab. The receiver prgoram configures and controls the Si4355 receiver chip via the SPI bus. The Si4355 receives the packets transmitted by the keyfob, checks the preamble , the syn bytes and the CRC. If the packet is OK, the program flashes the LEDs according to the button information in the status byte of the received packet. 6. Schematics Schematics of the transmitter and receiver boards of the kit can be seen on the following pages. Complete manufacturing file pack with CAD/CAM files and BOMs can be found at http://www.silabs.com.
Rev. 0.2 5
6 Rev. 0.2
Rev. 0.2 7
8 Rev. 0.2 DOCUMENT CHANGE LIST Revision 0.1 to Revision 0.2 Updated "2. Operating the Demo" on page 2. Updated Table 2 on page 2.
Rev. 0.2 9 NOTES:
10 Rev. 0.2 CONTACT INFORMATION Silicon Laboratories Inc.
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Austin, TX 78701 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Please visit the Silicon Labs Technical Support web page: https://www.silabs.com/support/pages/contacttechnicalsupport.aspx and register to submit a technical support request. Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc. Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders. The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed features or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty, rep- resentation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation conse- quential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intended to support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where per- sonal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized ap- plication, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages.