Radio Encoder / Decoder IC’s
Typical application circuit for RF800 setup as a Decoder
RF800
Pin Descriptions for RF800 configured as a Decoder
Pin
Number
1
2
3
4
Name
MCLR
Mode
100 / 400
TEN / LRN
Type
Power
In/Out
In
In/Out
Description
Vcc supply voltage connection
Selects operation as Decoder when low or Encoder when high.
RF baud rate (element time) select option.
Logic ‘1’ selects 100us element time.
Logic ‘0’ selects 400us element time.
Learn button, puts RF800 Decoder into learn mode when
momentarily connected to GND
Sets outputs to either latched or monetary for operation with the 204
handheld transmitter.
Logic “1” selects momentary mode
Logic “0” selects latching mode
Learn LED drive. Active low.
Received RF serial data
0 volts.
Connect to 4MHz, 3 terminal resonator.
Connect to 4MHz, 3 terminal resonator.
Logic outputs 9 to 16 (active low)
Vcc supply voltage connection.
Decouple with a 100n capacitor close to the IC supply pins.
Logic outputs 1 to 8 (active low)
5
6
7
8 & 19
9
10
11-18
20
21-28
TEN / 204
LED
Data
GND
OSC1
OSC2
Out 9-16
Vcc
Out 1-8
In/Out
Out
In/Out
Power
In
Out
Out
Power
Out
DS800-4 July ’07
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Tel 01273 898000 Fax 01273 480661
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