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SI4311-DB Datasheet(PDF) 2 Page - Silicon Laboratories |
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SI4311-DB Datasheet(HTML) 2 Page - Silicon Laboratories |
2 / 11 page Si4311-DB 2 Rev. 0.3 Figure 2. Si4311 DEMO Board Bottom Side with 9 V Battery Power Supply Connector J1: Jumper to select external 3.3 V supply. This is a solderable jumper and should be shorted when used. J7: External 3.3 V supply connector: +3.3 V with the jumper on the right side and GND on the left side. J3: 9 V battery supply connector: Power on with the jumper on the right side and power off with the jumper on the left side. J8: Jumper used to measure Si4311 current consumption. Jumper connected (shorted) is normal operation. Jumper connected with an ammeter in series to measure current. D3: Power-on indicator. LED lights up when powered on. RF Input J4: SMA connector for an external RF input. Ensure inductor L3 is open to remove the PCB antenna when using the SMA input. Demodulated Data Output J5: SMA connector for demodulated data output. External Clock Driver J9/J17: These solder jumpers should be shorted when an external clock driver is used. J10: External clock connection point. Automatic Frequency Centering (AFC) J11: Jumper used to select AFC function. Logic High (left side connection) to enable AFC. Logic Low (right side connection) to disable AFC. Carrier Frequency Selection J12: Jumper used to select 315 or 433.92 MHz carrier frequency. Logic High (left side connection) for 315 MHz. Logic Low (right side connection) for 433.92 MHz. |
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