S i 4 3 1 2 - D B
2
Rev. 0.3
Figure 2. Si4312 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.
Ratio Setting
J11: Jumper used to select ratio setting.
Logic High (left side connection) for ratio = 10.
Logic Low (right side connection) for ratio = 5.
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.
Summary of Contents for Si4312
Page 4: ...Si4312 DB 4 Rev 0 3 4 Schematic Figure 3 Si4312 DEMO Schematic ...
Page 6: ...Si4312 DB 6 Rev 0 3 Figure 6 Si4312 PCB Top Silkscreen Figure 7 Si4312 PCB Bottom Silkscreen ...
Page 8: ...Si4312 DB 8 Rev 0 3 7 Receiving Data Status 8 References Si4312 Data Sheet ...
Page 9: ...Si4312 DB Rev 0 3 9 NOTES ...
