CC2510FX Datasheet, PDF (200/253 Pages) List of Unclassifed Manufacturers – True System-on-Chip with Low Power RF Transceiver and 8051 MCU

CC2510Fx / CC2511Fx
The preamble pattern is an alternating
sequence of ones and zeros
(01010101…). The minimum length of the
preamble is programmable. When
enabling TX, the modulator will start
transmitting the preamble. When the
programmed number of preamble bytes
has been transmitted, the modulator will
send the sync word and then data from the
RFD register.
The number of preamble bytes is
programmed
with
the
MDMCFG1.NUM_PREAMBLE value.
The synchronization word is a two-byte
value set in the SYNC1 and SYNC0
registers. The sync word provides byte
synchronization of the incoming packet. A
one-byte sync word can be emulated by
setting the SYNC1 value to the preamble
pattern. It is also possible to emulate a 32
bit
sync
word
by
using
MDMCFG2.SYNC_MODE=3 or 7. The sync
word will then be repeated twice.
CC2510Fx/CC2511Fx supports both fixed
packet length protocols and variable
length protocols. The maximum packet
length is 255 bytes. For longer packets,
infinite packet length mode must be used.
Fixed packet length mode is selected by
setting PKTCTRL0.LENGTH_CONFIG=0.
The desired packet length is set by the
PKTLEN register.
In variable packet length mode,
PKTCTRL0.LENGTH_CONFIG=1, the
packet length is configured by the first byte
after the sync word. The packet length is
defined as the payload data, excluding the
length byte and the optional automatic
CRC. The PKTLEN register is used to set
the maximum packet length allowed in RX.
Any packet received with a length byte
with a value greater than PKTLEN will be
discarded.
With PKTCTRL0.LENGTH_CONFIG=2, the
packet length is set to infinite and
transmission and reception will continue
until turned off manually. The infinite mode
can be turned off while a packet is being
transmitted or received. As described in
the next section, this can be used to
support packet formats with different
length configuration than natively
supported by CC2510Fx/CC2511Fx.
CC2510Fx/CC2511Fx PRELIMINARY Data Sheet (Rev. 1.2) SWRS055A Page 200 of
252