AX5043-QFN28-TU AXSEM, AX5043-QFN28-TU Datasheet - Page 37

• Manufacturer Part Number: AX5043-QFN28-TU
• Description: RF Transceiver Narrow-Band-IC
• Manufacturer: AXSEM

Specifications of AX5043-QFN28-TU

• Number Of Receivers: 1
• Number Of Transmitters: 1
• Wireless Frequency: 70 MHz to 1050 MHz
• Interface Type: SPI
• Output Power: 18 dBm to 22 dBm
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Maximum Supply Current: 60 mA
• Minimum Operating Temperature: - 40 C
• Modulation: ASK, FSK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

37
Circuit Description
5.17. Wire-Mode Interface
In wire-mode the transmitted or received data are transferred from and to the
AX5043
using the
pins DATA and DCLK. DATA is an input when transmitting and an output when receiving.
PWRMODE
The direction can be chosen by programming the
register.
Wire-mode offers two variants: synchronous or asynchronous.
In synchronous wire-mode the, the
AX5043
always drives DCLK. Transmit data must be applied to
DATA synchronously to DCLK, and receive data must be sampled synchronously to DCLK. Timing is
given in Figure 9. In asynchronous wire-mode, a low voltage RS232 type UART can be connected to
DATA. DCLK is optional in this mode. The UART must be programmed to send two stop bits, but
must be able to accept only one stop bit. Both the UART data rate and the
AX5043
transmit and
receive bit rate must match. The
AX5043
synchronizes the RS232 signal to its internal
transmission clock, by inserting or deleting a stop bit.
Wire-mode is also available in 4-FSK-mode. The two bits that encode one symbol are serialized on
the DATA pin. The PWRAMP pin can be used as a synchronization pin to allow symbol (dibit)
boundaries to be reconstructed. Gray coding is used to reduce the number of bit errors in case of a
wrong decision.
Registers for setting up the
AX5043
are programmed via the serial peripheral interface (SPI).
Wire-Mode Timing
Figure 9 Wire-mode interface timing
Version 0.2
Preliminary
Datasheet AX5043