RF803-ALPHA RFSOLUTIONS [rfsolutions.ltd], RF803-ALPHA Datasheet - Page 11

• Manufacturer Part Number: RF803-ALPHA
• Description: EASY TO USE TELEMETRY SYSTEM USING ALPHA MODULES
• Manufacturer: RFSOLUTIONS [rfsolutions.ltd]

D
D
S
S
8
8
0
0
3
3
-
-
A
A
L
L
P
P
H
H
A
A
-
-
1
1
ALPHA Encoder / Decoder IC’s
N
N
o
o
Serial Data Output
The RF803D-ALPHA has a serial data output. This outputs the serial number, button and
battery status of the transmitter encoder (RF803E-ALPHA). This data may be fed directly to a
microcontroller or RS232 type driver circuit which may then be fed directly to a PC serial port.
Serial data is output initially and again on every state change whilst data is being received from
the RF803E-ALPHA transmitter. i.e. this output is valid regardless of whether the RF803E-
ALPHA encoder has been learnt to the RF803D-ALPHA decoder or not. The serial data packet
contains a learn bit to show if an encoder input is learnt.
Serial Data Format
Serial Data is sent on every state change as a stream of 8 bytes at 19.2K 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
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:
v
v
‘
‘
0
0
9
9
N
12AB (hexadecimal) or 0001 0010 1010 1011 (binary)
N
N
©
©
2
2
0
0
T
T
0
0
e
8
8
e
X
l
l
R
R
0
0
F
F
1
1
2
2
S
S
7
7
o
o
X
3
3
l
l
u
u
8
8
t
t
9
9
i
i
o
o
8
8
STAT $ 0D $ 0A
n
n
0
0
s
s
0
0
L
0
0
L
t
t
d
d
F
F
,
,
a
Output from Serial Data pin
a
w
w
x
x
w
w
0
0
1
w
w
1
2
2
.
.
r
r
7
7
f
f
s
3
s
3
o
o
4
4
l
l
u
u
8
8
t
t
0
0
i
i
o
o
6
6
n
n
6
6
s
s
1
1
.
.
8 bytes of data transmitted
c
c
o
o
L F Line feed (last character)
CR Carriage return
.
.
u
u
Encoder serial number
Encoder Input information
Battery Status / Learn Status
k
k
P
P
a
a
g
g
e
e
1
1
1
1
RF803-ALPHA