RF600T_03 Datasheet, PDF (2/11 Pages) rfsolutions.ltd – Low-Power-Radio Transceiver IC

Low-Power-Radio Transceiver IC
RF600T
Pin Descriptions
Pin
Number
1
Name
RxR
2
CTS
LOOP
3
LEARN
4
RTS
5
GND
6
MODE
7
TxH
8
RxH
9
TxR
HBAUD
10
TXEN
RFBAUD
11
RXEN
12
IN1
13
IN2
14
Vcc
15
OSC2
16
OSC1
17
OUT1
18
OUT2
Type
In
Out
In
In/Out
In
In
In
In
Out
Out
In
Out
In
In
In
In
In
Out
In
Out
Out
Description
Received data from RF module.
Dual Function:
1. Clear to send data (to host) when low.
2. Enables loopback mode when low.
In addressed mode: Used to initiate ‘address learn’ and erase
functions. Drives indicator LED.
Request to send data (from host) when low.
Connect to 0 volts.
Device mode, addressed when high, broadcast when low.
Serial data from the host, to be sent on the RF path.
Serial data from the RF path to be sent to the host.
Dual Function:
1. Transmit data to the RF module.
2. Host baud rate select. See notes below.
Dual Function:
1. Transmit enable (low) for the RF module.
2. RF baud rate select. See notes below.
Receive enable (low) for the RF module.
Telemetry logic input #1. (addressed mode only)
Telemetry logic input #2. (addressed mode only)
Positive supply voltage connection.
Connect to 4MHz, 3 terminal resonator.
Connect to 4MHz, 3 terminal resonator.
Telemetry logic output #1. (addressed mode only)
Telemetry logic output #2. (addressed mode only)
Operating Modes
The device is capable of operation in one of two modes, either broadcast or addressed. The following description
describes the features of these mode and assumes two identical system nodes ‘A’ and ‘B’ each consisting of an
RF600T and its associated radio transceiver module.
Broadcast mode.
This mode allows a host generated data block from node ‘A’ to be transmitted and received by any number of
other nodes. This data is received and verified (for correct Manchester coding and CRC) by the other nodes before
being output to their host devices. Alternately, in the same way the other nodes can send data to node ‘A’. Note
that although any node can initiate a transfer, only one direction of transfer can be active at a given time.
Correct reception of a data packet is not acknowledged and the host nodes have the responsibility of ensuring that
data transfers occur as required by operating some form of message protocol over the half duplex data link.
Addressed mode
This mode allows a host generated data block from node ‘A’ to be transmitted and for the data frame to be
addressed to one other network node – in this case we assume node ‘B’. When the data is received by node ‘B’ it
is verified for correct Manchester coding, CRC and for address match and then an acknowledge message is
transmitted back to node ‘A’. Node ‘A’ then outputs a confirmation to the host in the form of the ASCII character ‘C’
(Confirmed). Note that confirmation is given when the data block is stored in the buffer of node ‘B’ and not when it
has been delivered to the host at node ‘B’.
DS601-2
11^th Dec 2003
©2003 Reg. No. 227 4001, ENGLAND
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