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3.4.2 Application Example 2: Wake on Preamble with Rx Early Exit
Table 7. Wake on Preamble with “Rx Early Exit = On” Configurations
Options
Value
Sleep Time
800 ms
Rx Time
20 ms
Rx Time Ext
200 ms
Wake-On Radio
On
Preamble
16-symbol
Rx Early Exit
On
Valid Reception
2 packets
This example is based on the one descript in Chapter 3.3.2.
Because the Rx Early Exit function is turned on and the “Valid Reception” is set to 2 packets, the device automatically exits the
RX state as soon as 2 identical valid packets are successfully captured. As shown in the below figure, due to the happening of
the early exit event, in the current cycle the Rx Time Ext is shortened from 200 ms to 150 ms.
SLEEP
SLEEP
(800 ms)
RX
(20 ms)
Wake on Preamble
RX EXT
(150 ms, saving 50 ms)
XTAL
(310 us)
TUNE
(300 us)
time
Early Exit
Data Packet
Data Packet
Preamble
Figure 17. Preamble Wake-On with Rx Early Exit
