CMT2210LW データシートの表示（PDF） - Unspecified
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CMT2210LW Datasheet PDF : 20 Pages
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the power up.
PUP
CMT2210LW
SLEEP
RX
XTAL
TUNE
Duty-Cycle Receive Mode
Figure 11. Operation States in Duty Cycle Receive Mode
Power Up (PUP) State
Once the device is powered up, the device will go through the Power Up (PUP) sequence which includes the task of releasing the
Power-On Reset (POR), turning on the crystal and calibrating the internal blocks. The PUP takes about 4 ms to finish in the
always receive mode. The average current of the PUP sequence is about 0.9 mA.
SLEEP State
In this state, all the internal blocks are powered down except the sleep timer. The sleep time is fixed at 3 ms. The sleep current is
about 60 nA.
XTAL State
Once the device wakes up from the SLEEP State, the crystal oscillator restarts to work. The current consumption in this state is
about 520 uA.
TUNE State
The device is tuned to the desired frequency and ready to receive. It usually takes approximately 300 us to complete the tuning
sequence. The current consumption in this state is about 2 mA.
RX State
The device receives the incoming signals and outputs the demodulated data on the DOUT pin. The current in this state is about
3.3 mA (315 MHz) or 3.8 mA (433.92 MHz).
5.6 Duty Cycle Receive Mode
In the duty-cycle mode, after the PUP the device will automatically repeat the sequence of SLEEP, XTAL, TUNE and RX until the
device is powered down. This allows the device to re-tune the synthesizer regularly to adept to the changeable environment and
therefore remain its highest performance. The device will continuously receive any incoming signals during the RX state and
send out the demodulated data on the DOUT pin. The PUP sequence consumes about 4 ms. See the figure below for the timing
and current consumption of the duty cycle receive mode
Rev 0.8 | Page 13/20
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