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RF96 Datasheet(PDF) 111 Page - HOPE Microelectronics CO., Ltd.

Part # RF96
Description  Low Power Long Range Transceiver
PDF  121 Pages
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Manufacturer  HOPE [HOPE Microelectronics CO., Ltd.]
Direct Link  https://www.hoperf.com/
Logo HOPE - HOPE Microelectronics CO., Ltd.

RF96 Datasheet(HTML) 111 Page - HOPE Microelectronics CO., Ltd.

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Page 111
RF96/97/98
Tel: +86-755-82973805
Fax: +86-755-82973550
E-mail: sales@hoperf.com http://www.hoperf.com
WIRELESS & SENSING
PRELIMINARY
DATASHEET
7.3.1.2. Sequencer Configuration
The following graph shows Listen mode - Wake on PreambleDetect state machine:
State M achine
Sequencer Off
&
Initial mode = Sleep or Standby
Start
bit set
IdleMode
= 1 : Sleep
LowPower
LowPowerSelection
= 1
Start
FromStart
= 00
Selection
Idle
On T1
FromIdle
= 1
On T2
Receive
On PreambleDetect
FromReceive
= 110 Sequencer Off
Figure 47. Wake On PreambleDetect State Machine
This example configuration is achieved as follows:
Table 90 Listen Mode with PreambleDetect Condition Settings
Variable
Effect
IdleMode
1: Sleep mode
FromStart
00: To LowPowerSelection
LowPowerSelection
1: To Idle state
FromIdle
1: To Receive state on T1 interrupt
FromReceive
110: To Sequencer Off on PreambleDetect interrupt
TTimer2 defines the maximum duration the chip stays in Receive mode as long as no Preamble is detected. In order to
optimize power consumption, Timer2 must be set just long enough for Preamble detection.
TTimer1 + TTimer2 defines the cycling period, i.e. time between two Preamble polling starts. In order to optimize average
power consumption, Timer1 should be relatively long. However, increasing Timer1 also extends packet reception duration.
In order to insure packet detection and optimize the receiver's power consumption, the received packet Preamble should
be as long as TTimer1 + 2 x TTimer2.
An example of DIO configuration for this mode is described in the following table:
Table 91 Listen Mode with PreambleDetect Condition Recommended DIO Mapping
DIO
Value
Description
0
01
CrcOk
1
00
FifoLevel
3
00
FifoEmpty
4
11
PreambleDetect
– Note: MapPreambleDetect bit should be set.



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