–

–

–

–

10

11

Create Mode

The Create Mode allows the generation of a unique address to ensure the

security of transmission and prevent unintentional operation of devices. The

shipped with a unique address that is set at the factory. If a new Address is

desired, creating it is remarkably straightforward.

When the CREATE_ADDR line is pulled high, the encoder randomizes the

Address continuously until the CREATE_ADDR line is pulled low. Once

the encoder registers the low line, the Address is saved and the encoder

begins to toggle the MODE_IND line. This indicates to the user that the

encoder is ready to accept the Control Permissions.

Control Permissions are set by activating the data lines that the encoder

is to have the authority to operate. Each desired data line is activated

individually or simultaneously, in any order. Pulling the CREATE_ADDR line

high again or waiting for a 15-second timeout to expire causes the encoder

to save the Control Permissions and go back to sleep.

The Address is sent with every transmission when the SEND line is pulled

high, but the encoder can only activate the decoder data lines that are

authorized by the Control Permissions.

The Address is learned by an MS Series decoder by placing the decoder

into Learn Mode and sending a transmission from the encoder. Please refer

to the MS Series Decoder Data Guide for full details.

The CREATE_ADDR line can be tied to a button or contact point accessible

by the user. With a simple press, the user generates a unique address that

should never again require changing. Some designers may prefer to set an

Address during production and not provide for change by the user.

The MODE_IND line allows for the connection of an LED or other device to

indicate to the user that the encoder is in Create Mode. Once the CREATE_

ADDR line goes high and the encoder enters Create Mode, the MODE_IND

line goes high and stays high until the CREATE_ADDR line goes low. The

MODE_IND line is capable of sourcing up to 25mA of current.

Power Up

NO

NO

YES

YES

Pull The TX_CNTL

Line Low

Set Baud Rate

NO

YES

Sleep

Get the Data From

the Data Lines

Send the Data

Packet

Pull The TX_CNTL

Line High

NO

YES

Pull MODE_IND

Line High

Randomize

Address

Pull MODE_IND

Line Low

Save Address

Start Toggling

MODE_IND

Save Control

Permissions

Pull MODE_IND

Line Low

YES

YES

NO

NO

Poll Data Lines &

Update Control

Permissions

Compare With

Control

Permissions

Is the

SEND Line High?

Is the

CREATE_ADDR

Line High?

Is the

SEND Line High?

Is the

CREATE_ADDR

Line High?

Time Out?

Is the

CREATE_ADDR

Line High?

Figure 10: MS Series Encoder Flowchart