si4430 Silicon Laboratories, si4430 Datasheet - Page 127

• Manufacturer Part Number: si4430
• Description: Si4430 Ism Transceiver
• Manufacturer: Silicon Laboratories

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
Si4430
skipvco
R/W
D0
127