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EZR-LEDK1W-868 Fiches technique(PDF) 3 Page - Silicon Laboratories |
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EZR-LEDK1W-868 Fiches technique(HTML) 3 Page - Silicon Laboratories |
3 / 10 page Si4010-RC-DEMO 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. The 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 counter 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 |
Numéro de pièce similaire - EZR-LEDK1W-868 |
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Description similaire - EZR-LEDK1W-868 |
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