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4313-DAPB-HB Datasheet(PDF) 3 Page - Silicon Laboratories |
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4313-DAPB-HB Datasheet(HTML) 3 Page - Silicon Laboratories |
3 / 8 page ![]() Si4010-Keyfob-DEMO Rev 1.1 3 3. Key Fob Demo The 4010-DAPB key fob transmitter and the 4313-DAPB receiver are the transmit and receive devices used in the key fob demo. This transmit/receive pair can be used to evaluate the capabilities of the Si4010 transmitter and the Si4313 receiver. The first step is to insert the CR2032 battery into the 4010-DAPB demo board and then place the board with the battery into the plastic key fob case. Next, insert a battery in the 4313-DAPB receiver board and turn it on using the switch on the board. The key fob first transmits an RF packet nine times (each time a button is pressed), and it also blinks the LED. The packet structure is as follows: Button1 .. AA AA AA AA 2D D4 D7 28 D7 Button2 .. AA AA AA AA 2D D4 F5 0A F5 Button3 .. AA AA AA AA 2D D4 5F A0 5F Button4 .. AA AA AA AA 2D D4 7D 82 7D Button5 .. AA AA AA AA 2D D4 FF 00 FF (Then, the key fob also transmits two other packets appropriate for Silicon Labs Si4311 and Si4312 receiver demo boards.) The first four bytes are preamble, the next two is the sync word and the last three are the button info. Therefore if any key pressed on the key fob, a combination of LEDs will light up on the Receiver Board according to the button info part of the packet. The structure of the packets is detailed below: The structure of the Function Control Byte is shown below. For each LED output there are two bits assigned to define their mode of operation: OUT3 / F1 sent out first, OUT0–OUT3 represent the four LED outputs, F0–F1 represents the function bits. Output functions controlled by the function bits are the followings: Mono-stable mode will be restarted as long as the proper Function Control Byte is received. Preamble Byte Synchron Byte Function Control Byte One’s complement of Function Control Byte Function Control Byte AAh 2DD4h See below See below See below OUT3 F1 OUT3 F0 OUT2 F1 OUT2 F0 OUT1 F1 OUT1 F0 OUT0 F1 OUT0 F0 F1 F0 Function 0 0 No change 0 1 Sets output logical low (LED is OFF) 1 0 Sets output logical high (LED is ON) 1 1 Sets output high in mono-stable mode, cycle time is 100 ms |
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