RFM22B-868-D QUASAR, RFM22B-868-D Datasheet - Page 32

• Manufacturer Part Number: RFM22B-868-D
• Description: MODULE, TRANSCEIVER, 20DB, 868MHZ
• Manufacturer: QUASAR

Specifications of RFM22B-868-D

• Modulation Type: FSK, GFSK, OOK
• Data Rate Max: 256Kbps
• Sensitivity: -121dBm
• Supply Voltage Range: 1.8V To 3.6V
• Supply Current: 85mA
• Interface Type: SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

R F M 2 2 B / 2 3 B
be modulated and transmitted. In RX mode it will be the received demodulated data. Figure 15 demonstrates using
SDI and SDO as the TX/RX data and clock:
TX off
RX off
TX on
RX on
TX mode
RX mode
command
command
command
command
nSEL
SDI
SPI input
don’t care
SPI input
MOD input
SPI input
don’t care
SPI input
Data output
SPI input
Data CLK
Data CLK
SPI output
don’t care
SPI output
SPI output
don’t care
SPI output
SPI output
SDO
Output
Output
Figure 15. Microcontroller Connections
If the SDO pin is not used for data clock then it may be programmed to be the interrupt function (nIRQ) by
programming Reg 0Eh bit 3.
4.2.3. PN9 Mode
In this mode the TX Data is generated internally using a pseudorandom (PN9 sequence) bit generator. The primary
purpose of this mode is for use as a test mode to observe the modulated spectrum without having to provide data.
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