MTX-405-433DR-B Radios Inc, MTX-405-433DR-B Datasheet - Page 5

• Manufacturer Part Number: MTX-405-433DR-B
• Description: MODULE TRANSMITTER 433MHZ 24DIP
• Manufacturer: Radios Inc

Specifications of MTX-405-433DR-B

• Frequency: 433MHz
• Applications: Automotive, General Wire Elimination
• Modulation Or Protocol: ASK, FSK
• Data Rate - Maximum: 200 kbps
• Power - Output: 10dBm
• Current - Transmitting: 18mA
• Data Interface: PCB, Through Hole
• Antenna Connector: Through Hole
• Voltage - Supply: 2.6 V ~ 16 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 24-DIP Module
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Memory Size: -
• Other names: 694-1013

ASK/FSK TRANSMITTER MODULE
MXR-405 Communication
MTX-405
Communication with the MTX-405 is accomplished through a universal asynchronous receive/
transmit (UART) peripheral interface. The UART uses 8-bit, non-parity, LSB, 1200bps baud
format. The maximum number of data bytes that can be transmitted in one packet is 50. The user
will transmit data through the UART on the MTX-405 via pin 24, URXD. The MTX-405 will
packetize and wirelessly transmit the data. The data being sent through the UART should follow a
specific protocol.
The communication protocol is outlined below:
Byte #1
Bytes #2-51 Data Bytes – The data bytes are the actual data byte values being transmitted by
When the first byte is received through the UART on the MTX-405, the user will have one second
to send the remaining data bytes to the MTX-405. If the MTX-405 does not receive all of the data
bytes within that second, the data the MTX-405 did receive will be dumped. For example, if the
user sends a 10 for the number of bytes and then only sends five more bytes within one second, the
MTX-405 assumes this is corrupted data and does not transmit the packet. The five bytes the
MTX-405 did receive will be discarded and the MTX-405 will wait for a new packet of data to be
received.
Number of Bytes – The number of bytes is one byte containing the total number of
data bytes. This byte should not be included in the number of bytes. Therefore, the
number of bytes should be one less than the total number of bytes being sent. The
maximum number of data bytes that can be transmitted is 50; therefore, the number
of bytes should not exceed 50.
the MTX-405. The MTX-405 can send a maximum of 50 data bytes per packet.
The first two bytes are used as preamble bytes by Radios, Inc. to differentiate the
detection of data from noise. They can be set to any value, but to work with the
HHDS-ML they must be set to 0xFF and 0x00, respectively.
-Page 5-