Transceivermodule 1 TRX433-10A / TRX868-10A (Vers. 1.0E ...

Transceivermodule 4 TRX433-10A / TRX868-10A (Vers. 1.0E)
Family overview Radiotransceivers TRXnnn-10
The Radiotransceivers of the TRX433 and TRX868 family are offered in three different versions, which are
different in software and / or in hardware.
Today the three versions A, B and C exists, with the following main differences:
Version A Version B Version C
Data interface RS232 any, transparent RS232
Configuration
through RS232
Sleep, Powerdown,
Wakeup features
Only most important
parameters, only
possible at powerup
Delay TX-RX 1 t DATA + tRADIO ,
see timing diagram
Comprehensive command
set, configurable anytime,
also while operating
no yes yes
6 t BIT-RADIO
Jitter +- 1/8 t BIT-RADIO
Comprehensive command
set, configurable anytime,
also while operating
8 t BIT_DATA + 50 t BIT_RADIO
Error checking CRC16 none with / without CRC16
Retransmit after
receive error
Yes, until receiver
acknowledges correctly
no no
Buffersize TX 2 x 31 Bytes Ringbuffer, 63 Bytes 2
Buffersize RX 1 x 31 Bytes, Ringbuffer Ringbuffer, 63 Bytes 2
data handshake RTS-CTS, XON-XOFF RTS-CTS
The three versions are covering the different needs of most applications as follow:
Version A is meant for simple applications as cable replacement e.g. between PC and peripheral devices, if
the time delay of the radio link doesn’t play any role. The Transceiver himself checks for errors in the
reception, sends an acknowledge back to the transmitter, which repeats the message in case of an error.
The data are transmitted over radio after the buffer is full or if during a time of 3ms no further data are
received. The Evalkit3 with the Version A of the Transceiver is ideally suited to test the radio range.
Version B is used, if maximum transparency and control of the radio link is necessary or wished. There’s
absolutely no coding or error check done. The input signal of the transmitter will be transmitted to the
receiver transparently and with a minimal delay, so the receiver outputs a 1:1 copy of the transmitter input
signal. This version nearly emulates a direct wire connection and gives maximum compatibility to any coding
scheme and radio module of other manufacturers.
Version C with a transparent byte mode is used, if short response times are needed for RS232 data
communication, and if you need full and easy control over many parameters of the communication. The
serial bytes input at the transmitter side are sent almost immediately, so the data will be output at the
receiver side only a few milliseconds later. If Error-checking is activated, the receiver outputs data only after
they are checked and ok. Without internal errorchecking, the user has to implement this task itself within the
application. Version C works well with protocols like X, Y, Z-modem because of the minimal timedelay.
1 tBIT_DATA : time of 1 Bit of the RS232 input data at the transmitter side
t BIT_RADIO : time of 1 Bit of the selected radio datarate
2
if the radio datarate is fast enough with respect to the RS232 baudrate, a continuous dataflow will result
without interruption by the Handshake.