Specifications

Page 41
WT1231H
Idle
Rx
Idle
Rx
ADVANCED COMMUNICATIONS & SENSING DATASHEET
Upo
n detection of a valid packet, the sequencing is altered, as shown below:
PayloadReady
ListenCriteria
passed
ListenEnd = 00
Listen Mode
Id
le Rx
ListenEnd = 01
ListenE
nd = 10
Listen Mode
Listen Mode
Idle Rx
Mo
d
e
Figure 22. Listen Mode Sequence (wanted signal is received)
4.3.4. Stopping Listen Mode
To abort Listen mode operation, the following procedure must be respected:

Program RegOpMode with ListenOn=0, ListenAbort=1, and the desired setting for the Mode bits (Sleep, Stdby, FS, Rx
or Tx mode) in a single SPI access

Program RegOpMode with ListenOn=0, ListenAbort=0, and the desired setting for the Mode bits (Sleep, Stdby, FS, Rx
or Tx mode) in a second SPI access
4.3.5. RC Timer Accuracy
All timings of the Listen Mode rely on the accuracy of the internal low-power RC oscillator. This oscillator is automatically
calibrated at the device power-up, and it is a user-transparent process.
For app
lications enduring large temperature variations, and for which the power supply is never removed, RC calibration
can be performed upon user request. RcCalStart in RegOsc1 can be used to trigger this calibration, and the flag
RcCalDone will be set automatically when the calibration is over.