The single-substrate, low-cost module comprises a Semtech SX1308 transceiver concentrator capable of managing packets from many remotely dispersed end-points, two Semtech SX1257 highly integrated RF front-end I/Q transceivers and an STMicroelectronics STM32F401 Arm Cortex M4 microcontroller. A Skyworks RF front-end multi-chip module provides antenna matching, receiver pre-amplifier and transmitter final stage function.
The MCU hosts packet forwarding, communication with the application host controller and the module’s power management functions. The packet forwarder handles the two-way communication of packets between an end-point and the network server while the host driver provisions a USB CDC virtual port to communicate with the host gateway application processor. Alternatively, if desired, the module’s UART port can be used for communication with the gateway’s host. The microcontroller firmware also takes care of the power management, in particular when using a USB port, by limiting downlink power consumption to within the 500 mA maximum power budget.
The module will be exhibited at electronica on the Murata booth in Hall C4 Stand 141.