SX1232
WIRELESS & SENSING
DATASHEET
4.5.2. Sequencer Transitions
The transitions between sequencer states are listed in the forthcoming table.
Table 24 Sequencer Transition Options
Variable
Transition
Selects the chip mode during Idle state:
0: Standby mode
IdleMode
1: Sleep mode
Controls the Sequencer transition when the SequencerStart bit is set to 1 in Sleep or Standby mode:
00: to LowPowerSelection
01: to Receive state
FromStart
10: to Transmit state
11: to Transmit state on a FifoThreshold interrupt
Selects Sequencer LowPower state after a to LowPowerSelection transition
0: SequencerOff state with chip on Initial mode
1: Idle state with chip on Standby or Sleep mode depending on IdleMode
Note: Initial mode is the chip LowPower mode at Sequencer start.
LowPowerSelection
FromIdle
Controls the Sequencer transition from the Idle state on a T1 interrupt:
0: to Transmit state
1: to Receive state
Controls the Sequencer transition from the Transmit state:
0: to LowPowerSelection on a PacketSent interrupt
1: to Receive state on a PacketSent interrupt
FromTransmit
Controls the Sequencer transition from the Receive state:
000 and 111: unused
001: to PacketReceived state on a PayloadReady interrupt
010: to LowPowerSelection on a PayloadReady interrupt
011: to PacketReceived state on a CrcOk interrupt. If CRC is wrong (corrupted packet, with CRC on but
CrcAutoClearOn is off), the PayloadReady interrupt will drive the sequencer to RxTimeout state.
100: to SequencerOff state on a Rssi interrupt
FromReceive
101: to SequencerOff state on a SyncAddress interrupt
110: to SequencerOff state on a PreambleDetect interrupt
Irrespective of this setting, transition to LowPowerSelection on a T2 interrupt
Controls the state-machine transition from the Receive state on a RxTimeout interrupt (and on
PayloadReady if FromReceive = 011):
00: to Receive state via ReceiveRestart
01: to Transmit state
FromRxTimeout
10: to LowPowerSelection
11: to SequencerOff state
Note: RxTimeout interrupt is a TimeoutRxRssi, TimeoutRxPreamble or TimeoutSignalSync interrupt.
Controls the state-machine transition from the PacketReceived state:
000: to SequencerOff state
001: to Transmit on a FifoEmpty interrupt
010: to LowPowerSelection
FromPacketReceived
011: to Receive via FS mode, if frequency was changed
100: to Receive state (no frequency change)
Rev 3 - August 2012
Page 45
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