IC RF TXRX SNGL-CHIP LP 20-QFN

CC2500-RTR1

Manufacturer Part NumberCC2500-RTR1
DescriptionIC RF TXRX SNGL-CHIP LP 20-QFN
ManufacturerTexas Instruments
CC2500-RTR1 datasheet
 


Specifications of CC2500-RTR1

Frequency2.4GHzData Rate - Maximum500kBaud
Modulation Or Protocol2-FSK, ASK, GFSK, MSK, OOKApplicationsISM, SRD
Power - Output-30dBm ~ 10dBmSensitivity-104dBm
Voltage - Supply1.8 V ~ 3.6 VCurrent - Receiving17mA
Current - Transmitting21.5mA @ 1 dBmData InterfacePCB, Surface Mount
Antenna ConnectorPCB, Surface MountOperating Temperature-40°C ~ 85°C
Package / Case20-VQFN Exposed Pad, 20-HVQFN, 20-SQFN, 20-DHVQFNOperating Temperature (min)-40C
Operating Temperature (max)85COperating Temperature ClassificationIndustrial
Product Depth (mm)4mmProduct Length (mm)4mm
Operating Supply Voltage (min)1.8VOperating Supply Voltage (typ)2.5/3.3V
Operating Supply Voltage (max)3.6VFor Use With296-24121 - DEV WRLSS TOOL FOR MSP430296-23125 - TARGET BRD WIRELESS EZ430-RF2500296-23031 - DEV WRLSS TOOL FOR MSP430/CC2500296-22903 - KIT EVAL MODULE FOR CC2500296-23077 - KIT DEV FOR CC2500/CC2550
Lead Free Status / RoHS StatusContains lead / RoHS non-compliantMemory Size-
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The
preamble
pattern
is
sequence of ones and zeros (101010101…).
The minimum length of the preamble is
programmable.
When
enabling
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 TX
FIFO if data is available. If the TX FIFO is
empty, the modulator will continue to send
preamble bytes until the first byte is written to
the TX FIFO. The modulator will then send the
sync word and then the data bytes. 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
MDMCFG2.SYNC_MODE=3 or 7. The sync word
will then be repeated twice.
CC2500 supports both fixed packet length
protocols and variable packet length protocols.
Variable or fixed packet length mode can be
used for packets up to 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
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 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,
packet length is set to infinite and transmission
and reception will continue until turned off
manually. As described in the next section, this
can be used to support packet formats with
different length configuration than natively
supported by CC2500 . One should make sure
that TX mode is not turned off during the
transmission of the first half of any byte. Refer
to the CC2500
an
alternating
details.
Note
that
TX,
the
supported (excluding the optional length byte
and CRC) is one byte of payload data.
15.2.1 Arbitrary Length Field Configuration
The packet length register, PKTLEN, can be
reprogrammed during receive and transmit. In
combination with fixed packet length mode
(PKTCTRL0.LENGTH_CONFIG=0) this opens
the possibility to have a different length field
configuration than supported for variable
length packets (in variable packet length mode
the length byte is the first byte after the sync
word). At the start of reception, the packet
length is set to a large value. The MCU reads
out enough bytes to interpret the length field in
the packet. Then the PKTLEN value is set
according to this value. The end of packet will
occur when the byte counter in the packet
by
using
handler is equal to the PKTLEN register. Thus,
the MCU must be able to program the correct
length, before the internal counter reaches the
packet length.
15.2.2 Packet Length > 256 bytes
Also the packet automation control register,
PKTCTRL0, can be reprogrammed during TX
and RX. This opens the possibility to transmit
and receive packets that are longer than 256
bytes and still be able to use the packet
handling hardware support. At the start of the
packet, the infinite packet length mode
(PKTCTRL0.LENGTH_CONFIG=2)
mode,
active. On the TX side, the PKTLEN register is
set to mod(length,256). On the RX side the
MCU reads out enough bytes to interpret the
length field in the packet and sets the PKTLEN
register to mod(length,256). When less than
256 bytes remains of the packet the MCU
disables infinite packet length mode and
activates fixed packet length mode. When the
internal byte counter reaches the PKTLEN
value, the transmission or reception ends (the
radio
the
TXOFF_MODE
CRC appending/checking can also be used
(by setting PKTCTRL0.CRC_EN=1).
When for example a 600-byte packet is to be
transmitted, the MCU should do the following
(see also Figure 12):
Set PKTCTRL0.LENGTH_CONFIG=2.
SWRS040C
Errata Notes [1] for more
the
minimum
packet
must
enters
the
state
determined
or RXOFF_MODE). Automatic
Page 30 of 89
length
be
by