SI4431-A0-FM Silicon Laboratories Inc, SI4431-A0-FM Datasheet - Page 133

• Manufacturer Part Number: SI4431-A0-FM
• Description: IC TXRX ISM 930MHZ 3.6V 20-QFN
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4431-A0-FM

• Package / Case: 20-QFN
• Mfg Application Notes: Transitioning SI4430/31 to Rev B
• Frequency: 240MHz ~ 930MHz
• Data Rate - Maximum: 128kbps
• Modulation Or Protocol: FSK, GFSK, OOK
• Power - Output: 13dBm
• Sensitivity: -118dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 18.5mA
• Current - Transmitting: 28mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Number Of Receivers: 2
• Number Of Transmitters: 1
• Wireless Frequency: 240 MHz to 930 MHz
• Output Power: 13 dBm
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 28 mA
• Minimum Operating Temperature: - 40 C
• Modulation: FSK, GFSK, OOK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Memory Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 336-1633-5

Register 55h. Calibration Control
Reset value = x1x00100
Name
Type
Bit
Bit
7
6
5
4
3
2
1
0
Reserved
adccaldone
xtalstarthalf
Reserved
vcocaldp
enrcfcal
skipvco
Name
vcocal
D7
rccal
R
xtalstarthalf
Reserved.
If Set, the Xtal Wake Time Period is Halved.
Delta-sigma ADC Calibration Done. Reading this bit gives 1 if the calibration process
has been finished.
RC Oscillator Fine Calibration Enable.
If this bit is set to 1 then the RC oscillator performs fine calibration in every app. 30 s.
RC Calibration Force.
If setting rccal = 1 will automatically perform a forced calibration of the 32 kHz RC Oscil-
lator. The RC OSC will automatically be calibrated if the Wake-Up-Timer is enabled or if
in the Wake-on-Receiver state. The calibration takes 2 ms. The 32 kHz RC oscillator
must be enabled to perform a calibration. Setting this signal from a 0 to 1 will initiate the
calibration. This bit is cleared automatically.
VCO Calibration Double Precision Enable.
When this bit is set to 1 then the VCO calibration measures longer thus calibrates more
precisely.
VCO Calibration Force.
If in Idle Mode and pllon = 1, setting vcocal = 1 will force a one time calibration of the syn-
thesizer VCO. This bit is cleared automatically.
Skip VCO Calibration.
Setting skipvco = 1 will skip the VCO calibration when going from the Idle state to the TX
or RX state.
R/W
D6
adccaldone
D5
R
Preliminary Rev. 0.4
enrcfcal
R/W
D4
Function
rccal
R/W
D3
vcocaldp
R/W
D2
vcocal
R/W
D1
Si4431
skipvco
R/W
D0
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