WP-RF-RF650-EV datasheet, PDF - EEWORLD Datasheet

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WP-RF-RF650-EV: DescriptionNarrow Band Radio Transceiver; File Size178KB，9 Pages; ManufacturerETC1

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WP-RF-RF650-EV Overview

Narrow Band Radio Transceiver

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Narrow Band Radio Transceiver

WP-RF-RF650

General

•

Intelligent Modem RF Transceiver

RF Data Rates to 100 kbps

Upto 250metres Range

Selectable ‘Narrowband’ RF Channels

Crystal Controlled RF Design

Supply Voltage 3.3V

Serial Data Interface with Handshake

Host Data Rates up to 38,400 Baud

Very Stable Operating Frequency

Low Profile Ceramic DIL Package

Operates from –20 to +70 0C

Operating Modes

•

Point to Point

broadcast

One to Many Network

Many to One Network

Applications

•

Wireless Security Systems

EPOS Terminals

Sensor Data logging

Remote Telemetry & Telecommand

Remote Meter Reading

Description

The RF650 radio transceiver module provides a reliable wireless communications for the transfer of data at

Gaussian Frequency Shift Keying (GFSK), Manchester encoded, RF data rates of up to 100 kbps. Their

unique features of narrow band operation and user channel selection combined with excellent interference

rejection make them an ideal choice for next generation applications. The transceivers have the functions of a

complete radio modem and simply require CMOS/TTL data at the transmit input and the corresponding

transceiver(s) output the same data. Preamble and CRC are automatically generated and added to the RF

transmission.

Operating within the 433MHz band the modules operate in user selectable channels. The RF650 can use any

channel in 100kHz steps. The modules both use a crystal controlled design which provides narrow band

performance which is far superior to other wideband ‘SAW’ based designs.

Possible applications include one-to-one and multi-node wireless links in applications including car and

building security, EPOS, inventory tracking, remote industrial process monitoring and computer networking.

Because of their small size and low power requirements, both modules are ideal for use in portable, battery

powered applications such as hand-held terminals.

Part Numbering

WP-RF-RF650

WP-RF-RF650-EV

Tranceiver IC PDIP Package - 16pin DIP

Evaluation Kit for Smart Radio - TBD

BlueTooth

•

GSM Engine

•

GPS Engine

•

Radio Modules

•

Data Radio

•

RF Remote

Video TX/RX

•

Antennas

•

Security

•

Point to Point

•

Multi Point

•

Dect engine

•

Meter Reading

Synthesised multi-channel

•

Xplore PC

•

μ-WEB

•

Paging

•

RTU

•

SMS

•

Lighting

Page 1 of 8

03-11-05

Narrow Band Radio Transceiver

WP-RF-RF650

Applications

The RF650 RF module has applications in many areas where reliable half duplex communications are

required over ranges up to 200 metres. The crystal controlled narrow band design gives reliable performance

within the 433MHz band.

The addressing protocol employed enables many different configurations such including; one-to-one

operation; for point to point data communication broadcast operation; where a single master address many

RF650 modules concurrently. (using many RF650 modules set to the same address), one-to-many; A

network consisting a master and many slaves (the receivers all have the same address) many-to-one; where

the transmitters all send to a single receiver address.

Because each RF650 can contain a unique address, multiple RF650 networks can co-exist in the same area.

Operation

The Host Data Rate pins are read when the PD pin goes high. The RF650 must be put into standby mode by

taking the PD pin low in order to change the selection.

The size of RF data packets are set during configuration. If fewer bytes are received by the RF650 than the

preset size, then after 10ms from the last byte received from the host, the RF packet will be processed

(expanded to meet the preset packet size) and transmitted. The RF data packet size must be set the same

for transmitter and receiver, otherwise the received packets will be discarded.

In order to optimise data rate , in a point-to-point configuration where data is mostly being sent in one

direction, the packet size for one data direction can be set to the maximum size, however the reverse

direction may be set to a smaller packet size, to implement an acknowledge reply for example.

The RTS pin overrides the timeout value. If a short data packet is sent, RF transmission will start as soon as

the RTS pin is taken ‘high’ after the last byte is sent to the module.

The RF650 contains an on-board data buffer equal to two data packets. Therefore if RTS is asserted (then

the host is unable to receive data) the RF650 will store a max of two data bytes, all further datapackets

received will be discarded.

No RF packets will be received by the module when it is in power down standby mode. Each RF650 has its

own preset address. This is set during configuration. Any data received is examined and the address header

embedded within the data packet is compared with the RF60 address. Only data received with matching

address will be processed and output to the host, all other data will be discarded.

All RF650 modules are shipped with a default address of 7E7E7E7E.

BlueTooth

•

GSM Engine

•

GPS Engine

•

Radio Modules

•

Data Radio

•

RF Remote

Page 3 of 8

Video TX/RX

•

Antennas

•

Security

•

Point to Point

•

Multi Point

•

Dect engine

•

Meter Reading

Synthesised multi-channel

•

Xplore PC

•

μ-WEB

•

Paging

•

RTU

•

SMS

•

Lighting

Narrow Band Radio Transceiver

WP-RF-RF650

RF650 Configuration

The configuration of the RF650 module may be changed by setting the Configuration pin low and sending a

set of configuration data bytes to the module on the Tx pin.

The RF Channel is calculated as:

Configuration value = (desired RF frequency – 422.4MHz) * 10

The Configuration pin must be held low for at least the first byte to change the RF650 module into

configuration mode. If the Configuration pin is still low at the end of the configuration then the module will

send the current configuration back to the host. To retrieve the current configuration without changing any

options the host can send a single byte to the module and wait for the response.

It is not necessary to send all configuration bytes to the module, but all data sent must be valid. For example

to change the destination address the host may just send four bytes. Configuration data excluded from the

end of the data stream will be unchanged. The RF650 module will accept a short configuration after a 10ms

timeout after the last byte sent to the module, or when the RTS pin goes high. This allows for the host to

easily change the destination address of the RF data packet, thus enabling one RF650 to send individual

data to several different recipient modules.

A destination address of 00000000 will reset the RF650 to the default settings shown above.

RF data packets received by the RF650 with the embedded destination address which matches the RF650

address will be accepted, processed and passed to the host, all of the RF data packets will be ignored.

When configuring the destination or RF650 address an incorrect number of bytes for an address will leave

the current address unchanged.

An invalid Transmitter Power or Packet Size setting will leave the current setting unchanged.

BlueTooth

•

GSM Engine

•

GPS Engine

•

Radio Modules

•

Data Radio

•

RF Remote

Page 4 of 8

Video TX/RX

•

Antennas

•

Security

•

Point to Point

•

Multi Point

•

Dect engine

•

Meter Reading

Synthesised multi-channel

•

Xplore PC

•

μ-WEB

•

Paging

•

RTU

•

SMS

•

Lighting

WP-RF-RF650-EV Related Products

	WP-RF-RF650-EV	WP-RF-RF650
Description	Narrow Band Radio Transceiver	Narrow Band Radio Transceiver

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