DS800-4 July ’07

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Page 4

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Radio Encoder / Decoder IC’s

RF800

Typical application circuit for RF800 setup as a Decoder

Pin Descriptions for RF800 configured as a Decoder

Pin

Number

Name

Type

Description

1

MCLR

Power

Vcc supply voltage connection

2

Mode

In/Out

Selects operation as Decoder when low or Encoder when high.

3

100 / 400

In

RF baud rate (element time) select option.

Logic ‘1’ selects 100us element time.

Logic ‘0’ selects 400us element time.

4

TEN / LRN

In/Out

Learn button, puts RF800 Decoder into learn mode when

momentarily connected to GND

5

TEN / 204

In/Out

Sets outputs to either latched or monetary for operation with the 204

handheld transmitter.

Logic “1” selects momentary mode

Logic “0” selects latching mode

6

LED

Out

Learn LED drive. Active low.

7

Data

In/Out

Received RF serial data

8 & 19

GND

Power

0 volts.

9

OSC1

In

Connect to 4MHz, 3 terminal resonator.

10

OSC2

Out

Connect to 4MHz, 3 terminal resonator.

11-18

Out 9-16

Out

Logic outputs 9 to 16 (active low)

20

Vcc

Power

Vcc supply voltage connection.

Decouple with a 100n capacitor close to the IC supply pins.

21-28

Out 1-8

Out

Logic outputs 1 to 8 (active low)