7.5.26 Read RSSI FIFO Byte Interrupt

Description

The SPI command “Read RSSI FIFO Byte Interrupt” returns n data bytes of the content of the SFIFO in the RX direction. The desired number of returned data bytes is given by the step parameter. The access direction switch of the FIFO is set automatically and restored to the origin at the end of the command (direction temporarily stored in the T-bit).

The SPI command “Read RSSI FIFO Byte Interrupt” can be used instead of the command “Read RSSI FIFO” to read the SFIFO content without using the SPI FIFO. The data bytes are read directly from the SFIFO. This can be helpful in timing critical situations where every single byte is fetched in a certain time slot. Due to the bypassing mechanism of the SPI FIFOs, this SPI command only works with data rates up to 250 Kbit/s.

Command Frame

Parameters

• 0x1E – Command ID
• 0x01 – Parameter step
  • 0: Stop reading from SFIFO
  • 1: Continue reading from SFIFO

Return Values

• events.system – Event byte (For details, see SPI command “Get Event Bytes”.)
• events.events – Event byte (For details, see SPI command “Get Event Bytes”.)
• data – Data byte 1
• data – Data byte 2
• …
• data – Data byte n