Typical system setup, Figure 12: hs series encoder flowchart – Linx Technologies LICAL-ENC-HS001 User Manual

Page 12

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– –

– –

18

19

Power Up

NO

YES

Set Baud Rate

NO

YES

Is The

SEND Line

High?

Go To Sleep &

Wake On Interrupt

Is The

KEY_IN Line

High?

Pull The TX_CNTL

Line low

Is The

CREATE_PIN

Line High?

YES

NO

Time Out?

Set Timer

YES

NO

Is The

KEY_IN Line

High?

Is The

Data Valid?

Pull The TX_CNTL

Line High

YES

YES

NO

NO

Get Data

Is The

Data Valid?

YES

Did

Send And

Receive

Confirmation

Pass?

Save Data

Pull MODE_IND

High For 1 Second

YES

NO

NO

Is PIN

Active?

YES

NO

Set 15-Second

Timer

Toggle

MODE_IND Line

15 Second

Timer Time

Out?

YES

NO

Is The

CREATE Line

High?

YES

NO

Was The

4th Button

Pressed?

Save PIN

YES

NO

Is PIN

Enabled?

Set Timer To 2S

YES

NO

Is PIN

Active?

YES

NO

Did The Timer

Expire?

YES

NO

YES

NO

Was A Button

Pressed?

YES

NO

Was The

4th Button

Pressed?

Does PIN

Match?

YES

NO

Pull The DATA

Line High

Get Data Byte

Create Packet

Pull The DATA

Line Low

Send Packet

NO

YES

Is The

SEND Line

High?

Pull The TX_CNTL

Line High

Is PIN

Enabled?

Set Timer From

SEL_TIMER Line

NO

YES

Did The Timer

Expire?

NO

YES

Was A Button

Pressed?

NO

YES

Is The

SEND Line

High?

NO

YES

Pull The TX_CNTL

Line Low

Figure 12: HS Series Encoder Flowchart

Typical System Setup

The HS Series offers an unmatched combination of features and security,
yet is easy for system designers and end users to operate. The following
demonstrates a typical user setup followed by more detailed design
information. The Typical Applications sections of the encoder and decoder
data guides show the circuit schematics on which these examples are
based.

1. Create and exchange a key from a decoder to an encoder.

The high security key is created and exchanged by placing the decoder
in the Create Key Mode. The decoder’s MODE_IND line LED lights to
indicate that the decoder has entered Create Key Mode. The decoder’s
CREATE_KEY button is then pressed ten times to create the key. After
the tenth press, the MODE_IND LED turns off and the decoder sends
the key out of the KEY_OUT line. The MODE_IND LED on the encoder
lights to indicate that the key has been successfully transferred.

2. Establish Control Permissions

The user establishes what buttons on the encoder are recognized by
pressing the decoder's LEARN button. The decoder’s MODE_IND
LED starts flashing and the user presses the buttons that are allowed
access. Control Permissions are stored when the LEARN button is
pressed again or automatically after 17 seconds.

There are other powerful options such as programming a user PIN or
copying a decoder but these simple steps are all that is required for a
typical setup. It is really that simple for a manufacturer or end user to setup
the product!

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