RPC-UHF Datasheet, PDF (1/28 Pages) Radiometrix Ltd – Radio Packet Controller

Radiometrix
Issue 4, 25 July 2001
RPC-UHF
Radio Packet Controller
Modules: RPC-418-40: IC+BiM, UK version
RPC-433-40: IC+BiM, Euro version
IC’s:
RPC-000-DIL:
RPC-000-SO:
18 pin DIL IC
18 pin SO IC
The RPC-418-40 and RPC-433-40 are
intelligent transceiver modules which enable
a radio network/link to be simply implemented
between a number of digital devices. The
module combines a UHF radio transceiver
and a 40kbit/s packet controller.
The RPC-module
• SAW controlled FM transmitter and superhet receiver
• Reliable 30 meter in-building range, 120m open ground
• Built-in self-test / diagnostics / status LED’s
• Complies with ETSi 300-220 regulations
• Single 5V supply @ < 20mA
• 40kbit/s half duplex
• Free format packets of 1 - 27 bytes
• Packet framing and error checking are user transparent
• Collision avoidance (listen before transmit)
• Direct interface to 5V CMOS logic
• Power save mode
INTRODUCTION
The RPC is a self-contained plug-on radio port which requires only a simple antenna, 5V supply and a
byte-wide I/O port on a host microcontroller (or bi-directional PC port).
The module provides all the RF circuits and processor intensive low level packet formatting and packet
recovery functions required to inter-connect an number of microcontrollers in a radio network.
A data packet of 1 to 27 bytes downloaded by a Host microcontroller into the RPC's packet buffer is
transmitted by the RPC’s transceiver and will "appear" in the receive buffer of all the RPC's within
radio range.
A data packet received by the RPC’s transceiver is decoded, stored in a packet buffer and the Host
microcontroller signalled that a valid packet is waiting to be uploaded.
figure 1: RPC + Host µ-controller
Radiometrix Ltd, RPC
page 1