CC1000
SWRS048A Page 29 of 55
Figure 18. Initializing sequence
Power Down
Power Off
Power turned on
Initialise and reset CC1000
MAIN:
RXTX = 0
F_REG = 0
RX_PD = 1
TX_PD = 1
FS_PD = 1
CORE_PD = 0
BIAS_PD = 1
RESET_N = 0
Program all registers except MAIN
Frequency register A is used for
RX mode, register B for TX
Calibrate VCO and PLL
Calibration is performed according
to single calibration algorithm for both
RX and TX mode
MAIN: RESET_N = 1
Wait 2 ms*
Reset and turning on the
crystal oscillator core
*Time to wait depends on the crystal frequency
and the load capacitance
MAIN: RX_PD = 1, TX_PD = 1, FS_PD = 1,
CORE_PD = 1, BIAS_PD = 1
PA_POW = 00h
Power Down
Power Off
Power turned on
Initialise and reset CC1000
MAIN:
RXTX = 0
F_REG = 0
RX_PD = 1
TX_PD = 1
FS_PD = 1
CORE_PD = 0
BIAS_PD = 1
RESET_N = 0
Program all registers except MAIN
Frequency register A is used for
RX mode, register B for TX
Calibrate VCO and PLL
Calibration is performed according
to single calibration algorithm for both
RX and TX mode
MAIN: RESET_N = 1
Wait 2 ms*
Reset and turning on the
crystal oscillator core
*Time to wait depends on the crystal frequency
and the load capacitance
MAIN: RX_PD = 1, TX_PD = 1, FS_PD = 1,
CORE_PD = 1, BIAS_PD = 1
PA_POW = 00h