User Manual

T940-HOM-004-Module
integration
manual_Rev4.docx
Date:
November 21, 2016
Block Diagram
The module contains a communication controller with embedded proprietary protocol software, a
narrow band high performance RF transceiver and three internal voltage regulators.
The communication controller handles the radio packet protocol. Data to be sent by the host is
received at the DATA_RX pin and buffered in the communication controller. The data packet is
then assembled with preamble, synchronization word and data with CRC check sum before it is
transmitted on RF.
The asynchronous UART interface consists of DATA_TX, DATA_RX and CTS/RXTX/RXEN_RADIO
signals and it is used for hardware handshake flow control.
The RF transceiver modulates the data to be transmitted on RF frequency, and demodulates data
that are received. Narrow band technology is used to enhance sensitivity and selectivity.
The supply voltage is connected to the VAccu pin. The module contains three internal voltage
regulators and can therefore operate over a wide supply voltage range.