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© Semiconductor Components Industries, LLC, 2016
August, 2016 - Rev. 3
1 Publication Order Number:
AND9353/D
AND9353/D
AX5031 Programming
Manual
OVERVIEW
AX5031 is a true single chip low−power CMOS
transmitter primarily for use in SRD bands. The on−chip
transmitter consists of a fully integrated RF generation with
modulator and power amplifier. Base band data processing
is implemented in an advanced and flexible communication
controller that enables user friendly communication via the
SPI interface.
Connecting the AX5031 to a Micro−Controller
The AX5031 can easily be connected to any
micro−controller. The micro−controller communicates with
the AX5031 via a register file that is implemented in the
AX5031 and that can be accessed serially via an industry
standard Serial Peripheral Interface (SPI) protocol.
Reset can be performed via the register file. Therefore,
and due to an integrated power−on−reset (POR) block there
is no dedicated reset pin.
The AX5031 sends data via the SPI port in frames. This
standard operation mode is called frame mode.
In frame mode, the internal communication controller
performs frame delimiting, and data is transmitted via a 32
level x 10 bit FIFO, accessible via the register file. Figure 1
shows the corresponding diagram. Connecting the interrupt
line is highly recommended, though not strictly required.
Figure 1. Connection Diagram with a Micro−Controller
AX5031
micro−
controller
CLK
MISO
MOSI
IRQ
SEL
SYSCLK
SPI
communication
mC clock input
Interrupt in
optional
recommended
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APPLICATION NOTE
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