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Page 59

RFM95/96/97/98(W)

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WIRELESS & SENSING

PRELIMINARY

DATASHEET

4.2.8.4. Sequencer State Machine

The following graphs summarize every possible transition between each Sequencer state. The Sequencer states are

highlighted in grey. The transitions are represented by arrows. The condition activating them is described over the

transition arrow. For better readability, the start transitions are separated from the rest of the graph.

Transitory states are highlighted in light grey, and exit states are represented in red. It is also possible to force the

Sequencer off by setting the Stop bit in RegSeqConfig1 to 1 at any time.

Seq uen cer: Start tran sition s

Sequencer Off

Initial mode = Sleep or Standby

On SequencerStart bit rising edge

If FromStart = 00

Start

On FifoThreshold

if FromStart = 11

If FromStart = 01 If FromStart = 10

LowPower

Selection

Receive

Transmit

Seq uen cer: State m ach ine

If LowPowerSelection = 1

Standby

if IdleMode = 0

Sleep

if IdleMode = 1

LowPower

Selection

If LowPowerSelection = 0

( Mode

Initial mode )

Sequencer Off

Idle

If FromPacketReceived = 000

If FromPacketReceived = 010

On T1 if FromIdle = 0

On T1 if FromIdle = 1

Packet

Received

On PayloadReady

if FromReceive = 010

If FromPacketReceived = 100

Via FS mode if FromPacketReceived = 011

On T2

On PayloadReady if FromReceive = 001

On CrcOk if FromReceive = 011

On PayloadReady if FromReceive = 011

(CRC failed and CrcAutoClearOn=0)

On RxTimeout

Receive

On Rssi if FromReceive = 100

On SyncAdress if FromReceive = 101

On Preamble if FromReceive = 110

On PacketSent

if FromTransmit = 1

On PacketSent

If FromRxTimeout = 10

Via ReceiveRestart

if FromRxTimeout = 00

Transmit if FromTransmit = 0

RxTimeout

If FromRxTimeout = 11

If FromRxTimeout = 01

Sequencer Off

Figure 24. Sequencer State Machine

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