Silicon Laboratories Si4012, Programming Manual

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A N 7 4 6
6 Rev. 0.1
4.2. Initialization
After power on or wake up from shut down, the chip goes through an internal reset process and gets in an initial
state.
Initialization of the chip can be done by setting some basic parameters of the chip operation according to the user’s
requirements. For calculating the parameters, a calculation spreadsheet, “si4012_calc_regs.xls”, is provided by
Silicon Labs. For details, see “AN564: Si4012 Calculator Spreadsheet Usage”, available at
www.silabs.com . The
user inputs the required values into the spreadsheet:

Center frequency

Modulation type

FSK deviation

Total PA power

Bit rate
and gets the PROPERTY values, such as:

PA_CONFIG

TX_FREQ

MODULATION_FSKDEV

BITRATE_CONFIG
in hex form that have to be used as parameters of the SET_PROPERTY command to be sent to the Si4012.
The commands typically used for initialization are:

SET_PROPERTY

SET_INT

CHANGE_STATE

LED_CTRL
To ease the use of these commands, a C header file called
Setup_Si4012.h
can be generated via the Wireless
Development Suite.