RF96 datasheet(111/121 Pages) HOPE

111 / 121 page

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

CrcOk

FifoLevel

FifoEmpty

PreambleDetect

– Note: MapPreambleDetect bit should be set.

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

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

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Scheda tecnica Scarica

Link URL