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Default state when the radio is
not receiving or transmitting.
Typ current consumption: 1.8 mA
Used for calibrating frequency
synthesizer up front (entering
receive or transmit mode can
then be done more quickly).
Transitional state.
Typ current consumption: 9 mA
Frequency synthesizer is on,
ready to start transmitting.
Transmission starts very
quickly after receiving the
STX command strobe.
Typ current consumption: 9 mA
Typ current consumption:
12.2 mA at -5 dBm output
14.6 mA at 0 dBm output
29.5 mA at +10 dBm output
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: 1.8 mA
Figure 3-4. Simplified State Diagram, With Typical Current Consumption at 1.2-kBaud Data Rate and
MDMCFG2.DEM_DCFILT_OFF = 1 (Current Optimized), Frequency Band = 315 MHz
3.5
Configuration Software
CC11x1-Q1 can be configured using the SmartRF
highly recommended for obtaining optimum register settings and for evaluating performance and
functionality. A screenshot of the SmartRF Studio user interface for CC11x1-Q1 is shown in
After chip reset, all the registers have default values as shown in
might differ from the default value. Therefore, after a reset, all registers that are different from the default
value need to be programmed through the SPI interface. For the CC11x1-Q1 device, the settings of the
CC1101 are valid.
Copyright © 2009–2010, Texas Instruments Incorporated
SPWDor wake-on-radio(WOR)
SIDLE
IDLE
SCAL
Manual
frequency
synthesizer
SRX or STX or SFSTXON or wake-on-radio(WOR)
calibration
Frequency
synthesizer startup,
optional calibration,
SFSTXON
settling
Frequency
synthesizer on
STX
STX
TXOFF_MODE = 01
SFSTXON or RXOFF_MODE = 01
STX or RXOFF_MODE=10
Transmit mode
SRX or TXOFF_MODE = 11
TXOFF_MODE = 00
Optional transitional state.
Typ current consumption: 8 mA
TX FIFO
Optional freq.
underflow
synth. calibration
SFTX
IDLE
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SWRS076B – 11-07-22-013 - APRIL 2009 – REVISED APRIL 2010
Lowest power mode. Most
register values are retained.
Sleep
Typ current consumption: 700 nA
(2 µA when wake-on-radio (WOR)
is enabled)
CSn= 0
SXOFF
CSn= 0
All register values are
Crystal
retained. Typ current
oscillator off
consumption 160 µA
Frequency synthesizer is turned on, can optionally be
calibrated, and then settles to the correct frequency.
Transitional state. Typ current consumption: 9 mA
SRX or wake-on-radio(WOR)
Receive mode
RXOFF_MODE = 00
In FIFO-based modes,
reception is turned off and this
RX FIFO
state entered if the RX FIFO
overflow
overflows. Typ current
consumption: 1.8 mA
SFRX
®
Studio software. The SmartRF Studio software is
Section
4. The optimum register setting
CC11x1-Q1
:
Typ current
consumption: 15.5 mA
Figure
3-5.
Detailed Description
23
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