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•
Change destination addresses without having to enter command mode
•
Receive success/failure status of each RF packet
•
Identify the source address of each received packet
To implement API operations, refer to
Modes of operation
XTend RF Modules operate in six modes.XTend RF Module Modes of Operation (RF modules can only be in one mode
at a time)
Idle mode
When not receiving or transmitting data, the RF module is in Idle Mode. The module shifts into the other modes of
operation under the following conditions:
•
Transmit Mode: Serial data is received in the DI Buffer
•
Receive Mode: Valid RF data is received through the antenna
•
Shutdown Mode: Shutdown condition is met
•
Sleep Mode: Sleep Mode condition is met
•
Command Mode: Command Mode Sequence is issued
The module automatically transitions back to Idle Mode after responding to these conditions.
Transmit mode
When the first byte of serial data is received from the UART in the DI buffer, the module attempts to shift to Transmit
Mode and initiate an RF connection with other modules. After transmission is complete, the module returns to Idle
Mode.
RF transmission begins after either of the following criteria is met:
1. RB bytes have been received by the UART and are pending for RF transmission. [Refer to the RB (Packetization
Threshold) Command]
2. At least one character has been received by the UART and is pending for RF transmission; and RO character times
of silence been observed on the UART. [Refer to the RO (Packetization Timeout) Command]
The following diagram shows the Transmit Mode Data Flow.
XTend RF Module User Guide
API operation
on page 57.
Modes of operation
17
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