Linx Technologies LICAL-ENC-MS001 - Manual (Page 8)

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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
MS encoder allows 16,777,216 (2
24 ) possible addresses. Each encoder is
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