RF803E Datasheet, PDF (7/13 Pages) List of Unclassifed Manufacturers – Encoder // Decoder IIC’’s

Encoder / Decoder IC’s
RF803
Serial Data Format
Serial Data is sent every 1/2 second as a stream of 7 bytes at 9.6K baud. The serial data format is:
8 data bits with 1 stop bit, no parity.
Serial data is output form the Decoder chip whenever a valid data packet from an RF80n or other
compatible RF Solutions transmitter is received regardless of learn
N N X X STAT $0D $0A _{7 bytes of data transmitted}
LF Line feed (last character)
CR Carriage return
Battery Status / Learn Status
Encoder Input information
Encoder serial number
Output from Serial Data pin
Encoder Serial Number [NN]: made up of two 8-bit bytes where the most significant byte is
transmitted first.
This provides a total of 65,536 possible serial numbers.
Example: 12AB (hexadecimal) or 0001 0010 1010 1011 (binary)
Encoder Input Information [XX]: made up of two 8-bit bytes.
The high order byte is sent first representing inputs 16 down to 9 where the MSb is input 16 and the
LSb is input 9.
The low order byte is sent next representing inputs 8 down to 1 where the MSb is input 8 and the
LSb is input 1.
A bit at state 1 represents an encoder input as active.
Using this method inputs can be multiplexed giving maximum versatility.
Example: 00000000 00001000 - Shows input 4 active.
00000001 00000000 – Shows input 9 active
10000001 00000001 – Shows inputs 16, 9 and 1 active
Status [STAT]: The status byte is made up of an 8-bit byte as follows:
BIT
Bit-7 down to 2
Bit 1
Bit 0
Description
Reserved
Learn status
Battery status
Details
For future usage
1 = encoder has been learnt
0 = encoder battery is OK
1 = encoder battery is low
Example: 00000010 = encoder battery ok, encoder has been learnt
00000001 = encoder battery low, encoder has not been learnt
DS803-7 April 04
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