CC2500_06 Datasheet, PDF (18/84 Pages) Texas Instruments – Single Chip Low Cost Low Power RF Transceiver

CC2500
SIDLE ^{SPWD or wake-on-radio (WOR)}
Sleep
Default state when the radio is not
receiving or transmitting. Typ.
current consumption: 1.5mA.
Idle
CSn=0
Used for calibrating frequency
SCAL
SXOFF
synthesizer upfront (entering
CSn=0
receive or transmit mode can Manual freq.
then be done quicker).
synth. calibration _{SRX or STX or SFSTXON or wake-on-radio (WOR)}
Transitional state. Typ. current
consumption: 7.4mA.
Crystal
oscillator off
Lowest power mode. Most
register values are retained.
Typ. current consumption
400nA, or 900nA when
wake-on-radio (WOR) is
enabled.
All register values are
retained. Typ. current
consumption; 0.16mA.
Frequency synthesizer is on,
ready to start transmitting.
Transmission starts very
quickly after receiving the
STX command strobe.Typ.
current consumption: 7.4mA.
SFSTXON
Frequency
synthesizer on
Frequency
synthesizer startup,
optional calibration,
settling
Frequency synthesizer is turned on, can optionally be
calibrated, and then settles to the correct frequency.
Transitional state. Typ. current consumption: 7.4mA.
STX
SRX or wake-on-radio (WOR)
STX TXOFF_MODE=01
SFSTXON or RXOFF_MODE=01
Typ. current consumption:
11.1mA at -12dBm output,
15.1mA at -6dBm output,
21.2mA at 0dBm output.
Transmit mode
STX or RXOFF_MODE=10
SRX or TXOFF_MODE=11
Receive mode
Typ. current
consumption:
from 13.3mA (strong
input signal) to 16.6mA
(weak input signal).
In FIFO-based modes,
transmission is turned off
and this state entered if the
TX FIFO becomes empty in
the middle of a packet. Typ.
current consumption: 1.5mA.
TXOFF_MODE=00
RXOFF_MODE=00
Optional transitional state. Typ.
current consumption: 7.4mA.
TX FIFO
underflow
Optional freq.
synth. calibration
RX FIFO
overflow
In FIFO-based modes,
reception is turned off and
this state entered if the RX
FIFO overflows. Typ.
current consumption:
1.5mA.
SFTX
Idle
SFRX
Figure 5: Simplified state diagram, with typical usage and current consumption at 250 kbps
data rate and MDMCFG2.DEM_DCFILT_OFF = 1 (current optimized)
9 Configuration Software
CC2500 can be configured using the SmartRF^®
Studio software, available for download from
http://www.ti.com. The SmartRF^® Studio
software is highly recommended for obtaining
optimum register settings, and for evaluating
performance and functionality. A screenshot of
the SmartRF^® Studio user interface for CC2500
is shown in Figure 6.
PRELIMINARY Data Sheet (Rev.1.2) SWRS040A
Page 18 of 83