C2510Fx / CC2511Fx
14.12.3
RX Termination Timer
CC2510Fx/CC2511Fx
has optional functions for
automatic termination of RX after a
programmable time. The termination timer
starts when in RX state. The timeout is
programmable with the
setting. When the timer expires, the radio
controller will check the condition for staying in
RX; if the condition is not met, RX will
terminate.
The programmable conditions are:
•
Continue
receive if sync word has been found
•
Continue
receive if sync word has been found or
preamble quality is above threshold
(PQT)
14.13 Frequency Programming
The
frequency
programming
in
CC2510Fx/CC2511Fx
is designed to minimize the
programming needed in a channel-oriented
system.
To set up a system with channel numbers, the
desired channel spacing is programmed with
If the system can expect the transmission to
have started when enabling the receiver, the
function can be used.
The radio controller will then terminate RX if
the first valid carrier sense sample indicates
no carrier (RSSI below threshold). See Section
Sense.
If RX terminates due to no carrier sense when
the
function is used,
or if no sync word was found when using the
timeout function, the chip
will always go back to IDLE.
the
and
registers. The channel
spacing registers are mantissa and exponent
respectively.
∆
f
CHANNEL
=
f
ref
2
18
⋅
(
256
+
CHANSPC
_
M
)
⋅
2
CHANSPC
_
E
⋅
CHAN
SWRS055D
Page 206 of 243
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