RFM31B-868-D QUASAR, RFM31B-868-D Datasheet - Page 16

• Manufacturer Part Number: RFM31B-868-D
• Description: MODULE, RECEIVER, -118DB, 868MHZ
• Manufacturer: QUASAR

Specifications of RFM31B-868-D

• Modulation Type: FSK, GFSK, OOK
• Sensitivity: -121dBm
• Power Supply: 1.8V To 3.6V
• Supply Current: 18.5mA
• Data Rate Max: 256Kbps
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RFM31B
3.2.3. RX State
The RX state may be entered from any of the IDLE modes when the rxon bit is set to 1 in "Register 07h. Operating
Mode and Function Control 1". A built-in sequencer takes care of all the actions required to transition from one of
the IDLE modes to the RX state. The following sequence of events will occur automatically to get the chip into RX
mode when going from STANDBY mode to RX mode by setting the rxon bit:
1. Enable the main digital LDO and the Analog LDOs.
2. Start up crystal oscillator and wait until ready (controlled by an internal timer).
3. Enable PLL.
4. Calibrate VCO (this action is skipped when the vcocal bit is “0”, default value is “1”).
5. Wait until PLL settles to required receive frequency (controlled by an internal timer).
6. Enable receive circuits: LNA, mixers, and ADC.
7. Enable receive mode in the digital modem.
Depending on the configuration of the radio all or some of the following functions will be performed automatically by
the digital modem: AGC, AFC (optional), update status registers, bit synchronization, packet handling (optional)
including sync word, header check, and CRC.
3.2.4. Device Status
Add R/W Function/Description
D7
D6
D5
D4
D3
D2
D1
D0
POR Def.
02
R
Device Status
ffovfl
ffunfl
rxffem
headerr
freqerr
cps[1] cps[0]
—
The operational status of the chip can be read from "Register 02h. Device Status".
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