RFM12B

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f LO BW <strong>RFM12B</strong> frequency (11MHZ crystal used) 433 MHz band,2.5KHz step 868 MHz band,5KHz step 915 MHz band,7.5KHz step 473.26 946.53 990.79 483.73 967.46 1022.2 MHz Receiver mode 0 60 67 75 bandwidth mode 1 120 134 150 mode 2 180 200 225 KHz mode 3 240 270 300 mode 4 300 350 375 mode 5 360 400 450 t lock PLL lock time After 10MHz step hopping, 30 us frequency error
Q o Quality factor of the output In low bands capacitance In high bands L out Output phase noise 100 kHz from carrier 1 MHz from carrier BR TX FSK bit rate Via internal TX data register BRA TX FSK bit rate TX data connected to the FSK input df fsk FSK frequency deviation Programmable in 15 kHz steps <strong>RFM12B</strong> 13 8 15 10 17 12 -80 dbc/HZ -103 172 kbps 256 kbps 15 240 kHZ AC characteristic(Turn-on/Turnaround timings) symbol parameter remark min typical max Unit T st Crystal oscillator startup Crystal ESR < 100 1 5 ms time Transmitter turn-on Synthesizer off, crystal T tx_XTAL_ON time oscillator on with 10 MHz step 250 us Receiver turn-on time Synthesizer off, crystal T rx_XTAL_ON oscillator on with 10 MHz step 250 us Transmitter – Receiver Synthesizer and crystal T tx_rx_SYNT_ON turnover time oscillator on during TX/RX 150 us change with 10 MHz step Receiver – Transmitter Synthesizer and crystal T rx_tx_SYNT_ON turnover time oscillator on during RX/TX 150 us change with 10 MHz step C xl Crystal load Programmable in 0.5 pF steps, 8.5 16 pf capacitance tolerance+/- 10% t POR Internal POR timeout After V dd has reached 90% of 100 ms final value t PBt Wake-up timer clock Calibrated every 30 seconds 0.96 1.05 ms period C in, D Digital input apacitance 2 pf t r, f Digital output rise/fall time 15pF pure capacitive load 10 ns Field testing range Band Test condition Distance 433MHz band Receiver bandwidth =67KHz, data rate=1.2kbps, transmitter frequency >200M deviation =45KHZ(matches with RFM12)In free open area 868MHz band Receiver bandwidth=67KHz,data rate =1.2kbps,Transmitter frequency >300M deviation =45KHZ(matches with RFM12)in free open area 915MHz band Receiver bandwidth=67KHz,data rate =1.2kbps,Transmitter frequency deviation =45KHZ(matches with RFM12)in free open area >300M Tel: +86-755-82973806 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com
Page 1 and 2: RFM12B UNIVERSAL ISM BAND FSK TRANS
Page 3: RFM12B I in Input current except po
Page 7 and 8: Tel: +86-755-82973806 Fax: +86-755-
Page 9 and 10: DIP PACKAGE(D) RFM12B Module Model
Page 11 and 12: RF12 programming guide RF12B Progra
Page 13 and 14: RF12B Program 5. Data Rate Command
Page 15 and 16: RF12B Program 9. Synchron pattern C
Page 17 and 18: RF12B Program 13. PLL Setting Comma
Page 19 and 20: RF12B Program 3. Demo flow diagram
Page 21 and 22: RF12B Program can read received and
Page 23 and 24: #define HI_SDI() #define LOW_SDI()
Page 25 and 26: DDRD=0x00;//PD INPUT; RF12B Program
Page 27 and 28: RF12B Program ; copyright (c) 2006
Page 29 and 30: #define HI_DATA() PORT_DATA|=1
Page 31 and 32: for(i=0;i
Page 33 and 34: #define SDI #define SDO #define SCK
Page 35 and 36: ChkSum+=0x3C; WriteFSKbyte(0x3D); C
Page 37 and 38: } nSEL=0; SDI=0; SCK=1; if(SDO) { R
Page 39 and 40: RF12B Program void Init_RF12(void);
Page 41 and 42: } NOP(); NOP(); NOP(); NOP(); NOP()
Page 43 and 44: while( us-- ) { i=1000; while( i--

RFM12B

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