e between two consecutive Event
programmed with a mantissa value given by
and an exponent value set by
The Event 1 timeout is programmed with
ming relationship between Event
an 11.08 ms when using a 26 MHz crystal
and 10.67 ms when a 27 MHz crystal is used.
is less than 11.08 (10.67) ms there is a
chance that the consecutive Event 0 will occur
in detail the theory of operation and the
different registers involved when using WOR,
as well as highlighting important aspects when
used for the WOR functionality varies with
temperature and supply voltage. In order to
keep the frequency as accurate as possible,
the RC oscillator will be calibrated whenever
possible, which is when the XOSC is running
the power and XOSC is enabled, the clock
used by the WOR timer is a divided XOSC
clock. When the chip goes to the
the RC oscillator will use the last valid
calibration result. The frequency of the RC
frequency divided by 750.
In applications where the radio wakes up very
often, typically several times every second, it
do the RC oscillator calibration
consumption. This requires that RC oscillator
calibration values are read from registers
If the RC oscillator calibration is
turned off it will have to be manually turned on
again if temperature and supply voltage
Refer to Application Note AN0
The radio controller controls most timing in
, such as synthesizer calibration, PLL
/TX turnaround times. Timing
from IDLE to RX and IDLE to TX is constant,
RX/TX and TX/RX turnaround times are
constant. The calibration time is constant
crystal clock cycles for key state transitions.
variable, but within the limits stated in
Note that in a frequency hopping spread
calibration time can be reduced from 721 µs to
50 µs. This is explained in
to TX/FSTXON, no calibration
to TX/FSTXON, with calibration
RX or TX to IDLE, no calibration
X to IDLE, with calibration
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