TRC1300, TRC1315

MARCSTAR

™ I E/D

REMOTE CONTROL ENCODER/DECODERS

SLWS011D – AUGUST 1996 – REVISED JANUARY 1997

8

POST OFFICE BOX 655303

PRINCIPLES OF OPERATION

general

Operation of the MARCSTAR I E/D devices is shown in Figure 2. The devices have two primary modes of

operation: encoder mode and decoder mode. Additional modes and functions include programming and

learning mode, self-testing mode, security code generation, and clock generation.

Power-On Reset

CONF

†

PROG

†

Test Mode

Low (Decoder Mode)

High (Encoder Mode)

PROG

†

Low

Low

LED On

Learn Code

LED Off

Decoder

Learn Path

High

(PROG)

Set Flag High

PROG

†

High

Decoder Mode

Encoder Mode

Reset Flag

Store a New Code

LED On (2 s)

Flag

High

Attempting To Retransmit

Received-Code Path

Program

Encoder

Path

Low

Normal Encode Path

Normal

Decode Path

† = Terminals

Low

TEST

†

TEST

†

High

(PROG)

High

High

Low

Low

Figure 2. Top Level Operational Flow