RF600D Datasheet, PDF (20/24 Pages) rfsolutions.ltd – RF / IR Encoder / Decoder Chipset RF Evaluation Boards

RF / IR Encoder / Decoder Chipset
RF Evaluation Boards,
RF600E
RF600D
any one time to prevent inter-module interference and also to prevent damage to the ‘data out’ signal pins
on the modules. The following table gives the link option fitment for each module.
Module
R5.
RRFQ1.
HRR3
Reference
(M2)
(M3)
(M4)
Links to make
LK3, 4
LK5, 6
LK7, 8
RF600 Decoder Circuit.
The RF600 decoder stage of the RFEVAL2 board is implemented using the RF600D chip. This device
offers a complete ‘system on a chip’ solution to radio data reception, Keeloq decoding and non volatile
memory handling. Examination of the circuit diagram and layout reveals that U1, the RF600D device, is an
18 pin part which can be either in a DIL or a surface mount package. The associated 4 MHz resonator
(X1) provides a timing reference for the RF600D. A 93C76 EEPROM memory provides 512x16 bits of non
volatile memory which is used to store data on the encoders (up to 50) which have been ‘learned’ by the
system. Also in this circuit area can be seen a ‘learn’ switch (SW1) and an LED (LED1) and these parts
are used to control and indicate progress of both encoder learning and also data erasure. Option link fields
are provided for a number of functions:
OPT1 allows the selection of radio data or IR data.
OPT2 allows the selection of latch or momentary mode for the data outputs.
OPT3 allows the selection of input data sync pulse ‘mark’.
Note that where space is tight, a serial only version of the decoder - the RF600E is available in an 8 pin
DIL/SO package. This device does not decode the KeeLoq stream but after verifying that the data packet
is a true Manchester encoded packet, extracts the encoder serial number and button status and outputs
this as serial data. In applications where the high security level of KeeLoq encoding is not required, this
device provides a simple solution to the problem of reading and verifying data from the noisy data output
of a radio module.
Radio or IR data selection.
The RF600D chip can decode signals from either the radio modules or the IR receiver device and option
field OPT1 allows the selection of the desired input.
Input
Radio data
IR data
Make OPT1 link
RF
IR
Output function.
The RF600D chip has 4 data outputs and these can operate as either all latched or all momentary.
Output mode
Latch all
Momentary all
Make OPT2 link
LATCH
MOM
DS600-9 Sept ‘04
©2004 Reg. No. 227 4001, ENGLAND
Page 20