Smart Com Radio Transceiver IC RF600T Enables Easy Radio Communications Connects directly to RF Module Simple CMOS/TTL Data Interface Performs all Data Encryption for Reliable Data Comms. Addressed Mode With Acknowledge Broadcast Mode Automatic Retry Achieves Maximum Range From RF Modules Optional host Flow Control Two Telemetry I/O Lines (addressed mode only) Compatible With Most RF Modules Typical Applications Wireless RS232 Cable Replacement Alarm Systems Communications Systems 1 OUT2 RxR 18 2 Local Area Networking CTS OUT1 17 LEARN 3 OSC1 16 4 RTS OSC2 15 Hardware Features 5 Vcc GND RF600T 14 3.0 5.5V Operation. (2.0 5.5V optional) 6 IN2 MODE 13 190 Byte data Buffer TxH 7 IN1 12 RxH RxEN 8 11 Manchester Modulation TxEN 10 9 TxR CRC Error Checking 18 pin DIP/SOIC Package 2 Digital Telemetry Lines (addressed mode only) Asynchronous Serial Host Interface The RF600T provides a simple interface between TTL level asynchronous serial data sources and standard RF modules (Transceiver, Transmitter or Receiver) with minimal interface required. The RF600T performs all the necessary data manipulation and encryption required by the Radio module to achieve a reliable radio link whilst providing a simple data interface to the users controller. The device has been designed to obtain the maximum range from the Radio medium using automatic data packet generation with Manchester encoding and CRC based error checking. In addition, in addressed mode, automatic retries ensure that the host is informed of successful or failed data packet delivery. The RF600T uses control lines to handle the flow of data to and from the host, and incorporates a 190 byte data buffer. Part Number Description Package RF600T Transceiver IC PDIP Package 18pin PDIP RF600T-SO Transceiver IC SMT Package 18pin SO RF600T-EVAL Evaluation Kit for Smart Radio Modules th DS601-4 25 JUN 2004 2004 Reg. No. 227 4001, ENGLAND Page 1 Smart Com Radio Transceiver IC RF600T Pin Descriptions Pin Name Type Description Number 1 RxR In Received data from RF module. Dual Function: CTS Out 2 1. Clear to send data (to host) when low. LOOP In 2. Enables loopback mode when low. 2. In addressed mode: Used to initiate address learn and erase 3 LEARN In/Out functions. Drives indicator LED. 4 RTS In Request to send data (from host) when low. 5 GND In Connect to 0 volts. 6 MODE In Device mode, addressed when high, broadcast when low. 7 In Serial data from the host, to be sent on the RF path. TxH 8 Out Serial data from the RF path to be sent to the host. RxH Dual Function: TxR Out 9 1. Transmit data to the RF module. HBAUD In 2. Host baud rate select. See notes below. Dual Function: TXEN Out 10 1. Transmit enable (low) for the RF module. RFBAUD In 2. RF baud rate select. See notes below. 2. 11 RXEN Out Receive enable (low) for the RF module. 12 IN1 In Telemetry logic input 1. (addressed mode only) 13 IN2 In Telemetry logic input 2. (addressed mode only) 14 In Positive supply voltage connection. Vcc 15 Out Connect to 4MHz, 3 terminal resonator. OSC2 16 OSC1 In Connect to 4MHz, 3 terminal resonator. 17 OUT1 Out Telemetry logic output 1. (addressed mode only) 18 OUT2 Out 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. The RF600T must be configured before power up for either the broadcast or addressed mode of operation by means of the MODE pin (6). Note that for security, broadcast nodes will not receive data from addressed nodes. 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 th DS601-4 25 JUN 2004 2004 Reg. No. 227 4001, ENGLAND Page 2