RTX-24EM-HP
User guide
The technical characteristics can change without notice. AUR°EL S.p.A doesn’t assume the responsibility to the damages caused by an improper use of the device.
AUR°EL S.p.A.
Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY 12/11/2019 - Rev. A
Tel.: +390546941124 – Fax: +390546941660 Page 15
http://www.aurel.it
•
Status[0] shows the unlock state of the 2.4GHz LO frequency synthesizer (0: main LO PLL locked).
For connect transmission operation, status[2..0] must be equal to ‘000’.
8.2
SPI Commands
Read_RXFIFO
This command returns the next byte out of the RXFIFO. It also returns the total number of bytes currently
available in the RXFIFO (including the one being read).
This SPI operation works together with the internal microcontroller and is functional only when this latter
has been started (SPI command Start_Micro) and when the master clock is active (Crystal oscillator must be
enabled). The order is taken into account only when SS signal goes down and the RXFIFO size information
are sampled when SS is low.
Figure 3: Timing of the SPI Read_RXFIFO / Write_TXFIFO command
Write_TXFIFO
This command writes a byte to the TXFIFO. It also returns the total number of bytes in both FIFOs, not
including this one. This SPI operation works together whit the internal microcontroller and is functional
only when this latter has been started (SPI command Start_Micro) and when the master clock is active
(Crystal oscillator must be enabled). The order is taken into account only when SS signal goes down and the
FIFO size information are sampled by
mck
when SS is low.
