CC2510FX Datasheet, PDF (79/244 Pages) List of Unclassifed Manufacturers – True System-on-Chip with Low Power RF Transceiver and 8051 MCU

C2510Fx / CC2511Fx
32.768 kHz crystal oscillator. Refer to 7.5 and
7.6 for characteristics of these oscillators.
The CLKCON.OSC32K bit selects the source of
the 32 kHz clock. This bit must only be
changed while using the HS RCOSC as the
system clock source. When the high speed
crystal oscillator is selected and it is stable, i.e.
SLEEP.XOSC_STB is 1, calibration of the low
power RC oscillator is continuously performed.
This calibration is only performed in active
mode and PM0. The result of the calibration is
a RC clock running at 32 – 36 kHz for
CC2510Fx and 32 kHz for CC2511Fx.
The low power RC oscillator calibration may
take up to 2 ms to complete. The ongoing
calibration must be completed before entering
PM1 or PM2.
SWRS055D
Page 79 of 243