D

4

©

k

P

7

T

1

E

s

R

3

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

Output from Serial Data pin

N

N

X

X

STAT $0D $0A

LF Line feed (last character)

CR Carriage return

Battery Status / Learn Status

Encoder Input information

Encoder serial number

7 bytes of data transmitted

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

Description

Details

Bit-7 down to 2

Reserved

For future usage

Bit 1

Learn status

1 = encoder has been learnt

Bit 0

Battery status

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