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LICAL-DEC-HS001

HS SERIES DECODER DATA GUIDE

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PIN ASSIGNMENTS

1 D6 LICAL-DEC-HS001 D5 20

2 D7

D4 19

3 SEL_BAUD

D3 18

4 SEND_COPY

D2 17

5 GND

VCC 16

6 GND

VCC 15

7 COPY_IN

D1 14

8 CREATE_KEY

D0 13

9 KEY_OUT

DATA_IN 12

10 MODE_IND

LEARN 11

Figure 4: HS Series Decoder Pin Assignments

Pin Name

Pin Number I/O

Description

D0-D7

1, 2, 13, 14, 17-20 O

Data Output Lines

SEL_BAUD

3

I

Baud Rate Selection Line

SEND_COPY

4

I

Send Copy Activation Line

GND

5, 6

--

Ground

COPY_IN

7

I

Copy Input Line

CREATE_KEY

8

I

Create Key Activation Line

KEY_OUT

9

O Key and Transmitter ID Output Line

MODE_IND

10

O

Mode Indicator Output

LEARN

11

I

Learn Mode Activation Line

DATA_IN

12

I

Data Input Line

VCC

15, 16

--

Table 3: HS Series Decoder Pin Assignments

Positive Power Supply

NOTE:

None of the input lines have internal pull-up or pull-down resistors. The input lines must be in a known state

(either GND or VCC) at all times or the operation may not be predictable. The designer must ensure that the

input lines are never floating, either by using external resistors, by tying the lines directly to GND or VCC, or

by use of other circuits to control the line state.

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PIN DESCRIPTIONS

Data Lines

The decoder has eight data lines, D0 through D7. These lines will reproduce the

state of the encoder’s data lines upon reception of a valid packet.

SEL_BAUD

This line is used to select the baud rate of the

serial data stream. The state of the line allows

the selection of one of two possible baud

rates, as shown in the adjacent table.

SEL_BAUD Baud Rate (bps)

0

4,800

1

28,800

Table 4: Baud Rate Selection Table

The baud rate must be set before power-up. The decoder will not recognize any

change in the baud rate setting after it is on.

SEND_COPY

When this line is taken high along with the LEARN line, the decoder will enter

Send Copy Mode and output the User Data on the KEY_OUT line. When taken

high with the CREATE_KEY line at power-up, Send Copy Mode will be disabled.

GND

These lines are connected to ground.

COPY_IN

This line is used to input the User Data from another decoder.

CREATE_KEY

When this line is taken high along with the LEARN line, the decoder will enter

Create Mode and create a key and encoder ID. It will then send these to the

encoder through the KEY_OUT line. When taken high with the SEND_COPY line

at power-up, Send Copy Mode will be disabled.

KEY_OUT

When the SEND_COPY and LEARN lines are taken high at the same time, the

decoder will output the User Data on this line. This line will also output the

transmitter identity upon reception of the first valid packet of each session.

MODE_IND

This line will activate when a valid transmission is received, when the decoder

enters Learn Mode, Get Key Mode, Create Key Mode, or Send Copy Mode, and

when the memory is cleared. This allows for the connection of a LED to indicate

to the user that these events have taken or are taking place.

LEARN

When this line goes high and is then pulled low, the decoder will enter Learn

Mode to accept permissions from an encoder and store it in memory. If it is held

high for ten seconds, the decoder will clear all User Data from memory. If it goes

high with SEND_COPY or CREATE_KEY, then the decoder will enter Send

Copy Mode or Create Key Mode, respectively.

DATA_IN

This line accepts serial data from the encoder, usually via a wireless link.

VCC

These lines are connected to the positive power supply.

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